Monday, September 30, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 116


锟斤拷 If less than the specified value, test the signal circuit for a short to ground.



6. Ignition ON, test for less than 1 volt between the passenger seat belt tension sensor signal circuit terminal C X2 and ground.



锟斤拷 If greater than the specified range, test the circuit for a short to voltage



7. Test for less than 1 ohm between the PPS module signal circuit terminal 4(X88+HP2/Z88+HP2) or terminal 6 (-HP2/Z75+HP2) and the



passenger seat belt tension sensor terminal C X2.



锟斤拷 If greater than the specified range, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the PPS module.



8. If all circuits test normal, replace the passenger seat belt buckle which includes the seat belt tension sensor.



Repair Instructions



Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.



* SIR/SRS Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic



Procedures/Wiring Repairs/SIR/SRS Wiring Repairs)



* Driver or Passenger Seat Belt Buckle Replacement (with HP2) (See: Restraints and Safety Systems/Seat Belt Systems/Seat Belt



Buckle/Service and Repair/Driver or Passenger Seat Belt Buckle Replacement)Driver or Passenger Seat Belt Buckle Replacement (without



HP2) (See: Restraints and Safety Systems/Seat Belt Systems/Seat Belt Buckle/Service and Repair/Driver or Passenger Seat Belt Buckle



Replacement)



* Control Module References (See: Testing and Inspection/Programming and Relearning) for PPS replacement, setup, and programming



B0074



DTC B0074



Diagnostic Instructions



* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System



Check - Vehicle) prior to using the diagnostic procedure.



* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an



overview of the diagnostic approach.



* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure



Instructions) provides an overview of each diagnostic category.



DTC Descriptors



DTC B0074 03



- Passenger Occupant Classification Sensor Circuit Voltage Below Threshold



DTC B0074 07



- Passenger Occupant Classification Circuit Voltage Above Threshold



DTC B0074 08



- Passenger Occupant Classification Circuit Signal Invalid



Diagnostic Fault Information



Circuit/System Description



The passenger presence system (PPS) uses a silicone filled sensor pad located underneath the passenger seat foam cushion and is connected by a



hose clamp to a pressure sensor. The weight of the occupant sitting in the front passenger seat is measured as a pressure change within the bladder by



the pressure sensor. The pressure sensor is a 3-wire sensor consisting of a power, ground, and signal circuit. The PPS continually monitors itself and



if a fault in this circuit occurs, a DTC will set. When the sensing and diagnostic module (SDM) detects this DTC within the PPS, it will notify the



customer of the enable/disable status by illuminating the OFF indicator on the PASSENGER AIR BAG ON/OFF indicators. Then the PPS will



communicate to the SDM through serial data communications that a PPS fault is present. The SDM will then suppress the deployment of the



instrument panel (I/P) module and then illuminate the AIR BAG indicator.



Conditions for Running the DTC

GM Recalls 230,000 Chevrolets, Buicks And Cadillacs Due To Bad Brakes

Remember when 150,000 Dodge and Jeeps were recalled for dodgy brakes last month? The brake calipers were made by the same manufacturer.

General Motors has issued a massive recall affecting 210,628 vehicles in the US and 19,385 in Canada because of faulty brakes. According to a safety report filed by GM, improperly chromed rear brake caliper pistons can cause gas to be released into the braking system’s hydraulic circuit resulting in a “soft or spongy feel” when the brakes are applied.

Obviously, reduced brake response could increase the risk of an accident if you can’t stop in time. These brake calipers are sourced from Germany’s ZF group, which is the same manufacturer of the faulty brake calipers that led to 150,000 Dodge and Jeep vehicles being recalled.

“The manufacturer of the brake pistons failed to properly chrome and temper the brake pistons during the manufacturing process,” the report says. “In this condition, hydrogen gas can remain trapped in the piston body.” Vehicles affected by the recall are 2018 and 2019 models of the Buick LaCrosse, Cadillac XTS, GMC Terrain and Chevrolet Bolt EV, Cruze, Equinox, Impala, Malibu and Volt.

ZF Group has been investigating similar reports on its brake calipers from other automakers such as Audi, Volkswagen and BMW but failed to notify GM until June 14. Luckily, GM says it is not aware of any accidents caused by the brake issue. To rectify the problem, GM will bleed the rear brakes of affected vehicles to remove any gas.

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2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 442


3. Test for less than 1 ohm between each seat direction signal terminal listed below and the B+ terminal E with the switch in the closed position.



* Front vertical upward switch terminal A



* Front vertical downward switch terminal K



* Rear vertical upward switch terminal F



* Rear vertical downward switch terminal J



* Horizontal forward switch terminal D



* Horizontal rearward switch terminal C



* Recline forward switch terminal H



* Recline rearward switch terminal G



锟斤拷 If greater than the specified range, replace the adjuster switch switch.



Repair Instructions



Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.



* Power Seat Switch Replacement (with HP2) ()Power Seat Switch Replacement (without HP2) ()



* Control Module References (See: Testing and Inspection/Programming and Relearning) for MSM replacement, setup, and programming



B1820



DTC B1735, B1740, B1745, B1750, B1755, B1760, B1815, or B1820



Diagnostic Instructions



* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System



Check - Vehicle) prior to using this diagnostic procedure.



* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an



overview of the diagnostic approach.



* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure



Instructions) provides an overview of each diagnostic category.



DTC Descriptors



DTC B1735 01



- Seat Front Up Switch Circuit Short to Battery



DTC B1740 01



- Seat Front Down Switch Circuit Short to Battery



DTC B1745 01



- Seat Rear Up Switch Circuit Short to Battery



DTC B1750 01



- Seat Rear Down Switch Circuit Short to Battery



DTC B1755 01



- Seat Assembly Forward Switch Circuit Short to Battery



DTC B1760 01



- Seat Assembly Rearward Switch Circuit Short to Battery



DTC B1815 01



- Seat Recline Forward Switch Circuit Short to Battery



DTC B1820 01



- Seat Recline Rearward Switch Circuit Short to Battery



Diagnostic Fault Information

French Automaker PSA Will Make Decision About US By Spring

Will French cars finally make a comeback to the US market?

French cars haven't been sold in the United States for several decades, but that could change with the return of the PSA Group that builds Peugeot, Citroen, and DS, and recently purchased Opel from General Motors. Last year, PSA Group announced its triumphant return to the US and has recently reaffirmed its plan. In order to test the market, PSA arrived with a ride-sharing service that uses cars from other brands.

The next step involves using Peugeot cars for the ride-sharing service before eventually selling them. However, Automotive News reports that PSA still hasn't quite made up its mind on how it wants to sell cars in the US market.

In fact, PSA hasn't even decided which of its brands will be sold in the US. DS has been the most likely candidate because of its strong SUV and crossover lineup. In the coming months, the French automakers will be making the final decisions for which brand will arrive in the US and how they will be distributed. The most likely option is a traditional dealership franchise model, though nothing has been confirmed. If PSA does choose to open traditional dealerships, it needs to keep costs low to ensure profitability.

The whole decision to come back to the US has been made more difficult because of looming trade tensions. After levying a 25% tariff against China, President Trump threatened a similar tax on European vehicles, which could threaten PSA's return. We should hear PSA's decision in the spring of 2019 but the cars won't actually arrive until 2026. Expect a mix of crossovers and sedans, likely with electrified drivetrains. This is good news because we love some of the designs that have come out recently from Peugeot and DS.

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 610


* The DTC clears when the fault is no longer detected.



* The current DTC will become history when the request for the output is removed.



* The history DTC will clear after 50 consecutive fault-free ignition cycles have occurred.



Reference Information



Schematic Reference



Horn Schematics (See: Lighting and Horns/Horn/Diagrams/Electrical Diagrams)



Connector End View Reference



Component Connector End Views (See: Diagrams/Connector Views)



Description and Operation



Horns System Description and Operation (See: Lighting and Horns/Horn/Description and Operation)



Electrical Information Reference



* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit



Testing/Circuit Testing)



* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic



Procedures/Connector Repairs/Connector Repairs)



* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General



Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)



* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring



Repairs/Wiring Repairs)



Scan Tool Reference



Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information



Circuit/System Verification



Command the horn ON and OFF with the scan tool. The horn should turn ON and OFF when changing between the commanded states.



Circuit/System Testing



1. Ignition OFF, disconnect the X4 harness connector at the underhood fuse block.



2. Connect a test lamp between the control circuit terminal G1 and B+.



3. Press and release the horn switch. The test lamp should turn ON and OFF when changing between the commanded states.



锟斤拷 If the test lamp is always ON, test the control circuit for a short to ground or a sticking horn switch. If the circuit tests normal, replace the



BCM.



锟斤拷 If the test lamp is always OFF, test the control circuit for a short to voltage, an open high resistance, or a horn switch which is not closing.



If the circuit tests normal, replace the BCM.



4. If all circuits test normal, replace the underhood fuse block.



Repair Instructions



Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.



* Underhood Electrical Center or Junction Block Bracket Replacement (See: Maintenance/Fuses and Circuit Breakers/Fuse Block/Service and



Repair/Removal and Replacement/Underhood Electrical Center or Junction Block Bracket Replacement)



* Control Module References (See: Testing and Inspection/Programming and Relearning) for BCM replacement, setup and programming



B2850



DTC B2850, B2855, B2870, or B2875



Diagnostic Instructions



* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System



Check - Vehicle) prior to using this diagnostic procedure.



* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an



overview of the diagnostic approach



* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure



Instructions) provides an overview of each diagnostic category

Sunday, September 29, 2019

Volvo Wants Chinese-Built XC60 Exemption From US Tariffs

Will the Trump administration agree to this?

Like all automakers, Volvo’s crossover lineup is vital to its continued sales success, especially in the US. But unlike some of its competitors, Volvo’s XC60 is not built in the US, but rather in China and Sweden. And that now poses a problem. Reuters reports that Volvo has asked the Trump administration for an exemption from new 25 percent tariffs specifically for the XC60, which totaled nearly a third of its US sales last month.

"The imposition of the additional 25 percent duty on mid-size SUVs would cause severe economic harm," Volvo said in a letter last month to the US Trade Representative’s office. "The burden of the 25 percent duty imposed on vehicles imported from China will also be borne by American consumers.”

Remember, Volvo’s parent company is Chinese-owned Geely, so there is a political sensitivity here. Originally, the XC60 was built in Sweden and only more recently added the Chinese production line in order to satisfy growing demand. Apparently, since last March only XC60s built in China have been imported to the US.

Looking ahead a few years, Volvo’s newly opened production plant in Charleston, South Carolina could perhaps handle XC60 production, but right now it’s only handling the new S60 sedan. In fact, Volvo even told the USTR that “over time given our global manufacturing footprint we could also anticipate production of the XC60s in the US as well.”

Volvo’s request is also not without precedent. Specifically, GM asked the Trump administration last July for a tariff exemption for its Chinese-built Buick Envision crossover. However, GM suggested in its request a cap of 40,000 vehicles while Volvo asked the government for no cap. For now, the USTR has not ruled on either request. We don’t have any idea as to when an answer will come, but this is certainly a more vital issue for Volvo than GM, which has a much larger vehicle lineup and can far more easily handle the situation.

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 370


* The current DTC will clear and set the code to history, 3 seconds after no motor movement is requested or the current is no longer



mismatched, and the ignition is cycled OFF then back to ACC or RUN.



* The history DTC will clear after 50 consecutive fault-free ignition cycles have occurred.



Reference Information



Schematic Reference



* Driver Seat Schematics ()



* Adjustable Pedal Schematics (See: Accessories and Optional Equipment/Pedal Positioning System/Diagrams/Electrical Diagrams)



Connector End View Reference



Component Connector End Views (See: Diagrams/Connector Views)



Description and Operation



Memory Seats Description and Operation ()



Electrical Information Reference



* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit



Testing/Circuit Testing)



* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic



Procedures/Connector Repairs/Connector Repairs)



* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General



Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)



* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring



Repairs/Wiring Repairs)



Scan Tool Reference



Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information



Circuit/System Testing



DTC B1335 00 or B1335 0B



1. Ignition ON, use a scan tool to clear the current and history diagnostic trouble code.



2. Determine which motor set this DTC by operating the motors listed below one at a time in both directions. Check for the DTC to set between



each motor test.



* Driver seat front vertical motor



* Driver seat rear vertical motor



* Driver seat horizontal motor



* Driver seat recline motor



* Driver seat lumbar horizontal motor



* Driver seat lumbar vertical motor



* Adjustable pedal motor



3. Clear the diagnostic trouble codes.



4. Ignition OFF, disconnect the X1 harness connector at the appropriate seat adjuster assembly, lumbar adjuster assembly, or the adjustable pedal



motor for which the DTC set.



5. Ignition ON, operate the motor adjuster switch in both directions. DTC B1335 00 or B1335 0B should not set.



锟斤拷 If the DTC sets, test for a short between appropriate motor control circuits listed below. If the circuits test normal, replace the MSM.



* Front vertical motor terminal 2 and terminal 5



* Rear vertical motor terminal 1 and terminal 4



* Seat horizontal motor terminal 3 and terminal 6



* Seat recline motor terminal A and terminal B



* Lumbar vertical motor terminal A and terminal B



* Lumbar horizontal motor terminal C and terminal D



* Adjustable pedal motor terminal 4 and terminal 5



6. Test the appropriate control circuits listed below for a high resistance. If all circuits test normal, test or replace the appropriate seat, lumbar, or



adjustable pedal motor.



* Front vertical motor terminal 2 and terminal 5



* Rear vertical motor terminal 1 and terminal 4



* Seat horizontal motor terminal 3 and terminal 6



* Seat recline motor terminal A and terminal B



* Lumbar vertical motor terminal A and terminal B

This Is Buick’s Other New Chinese Crossover You Don’t Want

No word if it might come here.

Following Buick’s debut of the utterly stunning Enspire Concept, the brand followed it up by unveiling the relatively mundane—albeit production ready—Velite 6 crossover ahead of Auto China 2018 in Beijing. It joins the Velite 5, which is basically just a Buick-badged Chevrolet Volt. The Velite 6 is another one of those China-only Buicks you don’t really want anyway. However, it is the first General Motors product to be offered with both plug-in hybrid and full electric powertrains.

The plug-in hybrid will arrive first, featuring a 1.5-liter engine, two AC permanent-magnet synchronous electric motors, and a liquid-cooled lithium-ion battery pack. Buick says the Velite 6 plug-in can travel an estimated 434 miles. Buick was noticeably hushed about the pure electric Velite 6, except that it’s likely to arrive in Chinese showrooms sometime next year. The brand did say, however, the Velite 6 will “adopt a new-generation pure electric drive system,” which will be built at the new state-of-the-art SAIC-GM Power Battery Development Center in Shanghai also responsible for the CT6 PHEV’s battery pack. I

Both models under the Velite 6 umbrella will feature a new cloud-based Buick eConnect system that now enables over-the-air updates and allows for the entire vehicle to be managed via a smartphone app. The system gives users the ability to create multiple accounts, which enables personalization for navigation and audio system settings. The Buick Velite 6 is the production realized version of the sharp and shapely Velite Concept the brand first showed at the Guangzhou Motor Show in late 2016. The Velite 6 plug-in and Velite 6 electric will be displayed at Auto China 2018 in Beijing, which begins in earnest on April 25th.

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 244


* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System



Check - Vehicle) prior to using this diagnostic procedure.



* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an



overview of the diagnostic approach.



* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure



Instructions) provides an overview of each diagnostic category.



DTC Descriptors



DTC B0770 01



- AWD Indicator Circuit Short to Battery



DTC B0770 06



- AWD Indicator Circuit Short to Ground or Open



Diagnostic Fault Information



Circuit/System Description



The all wheel drive (AWD) indicator circuit consists of a light emitting diode (LED), a LED feed circuit and a LED control circuit. The indicator



dimming control circuit is the LED feed circuit and continuously supplies voltage to the 2 High, Auto 4WD, 4 Low and 4 High LEDs. When the



AWD mode has been selected by the driver, the transfer case shift control module (TCCM) provides a ground through the AWD indicator control



circuit illuminating the LED. The TCCM tests the AWD indicator circuit for unexpected voltage by monitoring the B+ supplied by the BCM on the



indicator dimming control circuit, by grounding the AWD indicator control circuit for 2 seconds during the bulb test at key ON.



Conditions for Running the DTC



B0770 01



* Ignition ON



* System voltage 10-18 V



* Instrument panel lights not dimmed.



* Daylight running lights MUST be commanded ON.



* Circuit tested when the AWD indicator is commanded OFF.



B0770 06



* Ignition ON



* System voltage 10-18 V



* Instrument panel lights not dimmed.



* Daylight running lights MUST be commanded ON.



* Circuit tested when the AWD indicator is commanded ON.



Conditions for Setting the DTC



B0770 01



The TCCM detects 3.4 V or greater on the AWD indicator control circuit when the AWD indicator is commanded ON.



B0770 06



The TCCM detects 1.6 V or less for 1.5 seconds on the AWD indicator control circuit when the AWD indicator is commanded OFF.



Action Taken When the DTC Sets



Normal operation, the SERVICE 4WD indicator is not commanded ON. Driver is informed of fault via bulb inspection.



Conditions for Clearing the DTC



* The TCCM clears the DTC once the condition for setting the DTC is no longer present.



* A history DTC clears after 40 consecutive warm up cycles without a fault present.



* History DTCs can be cleared using a scan tool.



Diagnostic Aids



* A TRUE B+ has enough current to light a test light.

8 GM Concept Cars We Want To See Enter Production In 2018

GM has built some amazing concepts that deserve to see the light of day.

Over the years, General Motors has trimmed the fat by killing off Hummer, Oldsmobile, Pontiac, Saab, and Saturn, while retaining core brands: Buick, Cadillac, Chevrolet, and GMC. Thanks to some corporate restructuring, GM is back to building great cars like the new Corvette ZR1. Still, we can't help but wonder what else the American auto giant is capable of. We've combed through some the GM's best concept cars, and have chosen eight, two forom each brand, that we'd like to see enter production in 2018.

Chevrolet Code 130R Concept

Back in 2013, rumors circulated that GM had plans to build a lightweight sports car to rival the 86 twins. GM showed off the Chevrolet Code 130R Concept at the 2012 Detroit Auto Show, with plans for a 1.4-liter turbocharged four-cylinder producing 150 horsepower mated to a six-speed manual. We would have loved to see an affordable sports car from GM, though it would have been tough for such a car to undercut the $26,000 base price of the turbocharged Camaro.

Opel GT

At the 2016 Geneva Motor Show, GM showed off yet another concept for a lightweight sport car - this time from Opel. This would have been a competitor for models like the Mazda Miata. GM planned for the revived Opel GT to be powered by a 1.0-liter turbocharged three-cylinder developing 145 hp and 151 lb-ft of torque. Unfortunately, GM sold the Opel and Vauxhall brands to PSA, so the GT will likely never see the light of day. We'd love to see this car be brought out with a Chevy badge, or even as an Opel under PSA ownership.

Hummer HX Concept

Many people questioned why GM kept GMC instead of Pontiac, because both brands simply built rebadged versions of other GM products. The simple answer is that GMC has incredibly high profit margins because trucks and SUVs are popular. With that in mind, we think GMC should compete with one of the most popular American icons in the world: the Jeep Wrangler. Back at the 2008 Detroit Auto Show, the Hummer brand revealed the HX Concept. Much like the Wrangler, this concept SUV featured a removable roof, and would be a stout competitor for the Wrangler and upcoming Ford Bronco.

Pontiac G8 Sport Truck

Even though manufacturing in Australia has ended, we can still dream of being able to drive a V8-powered ute in the United States. In 2010, Pontiac showed off a concept called the G8 Sport Truck. While the GM Zeta platform is now dead, we'd love to see GMC sell a RWD V8 ute. The brand could even revive the Sprint or Caballero names that were used for GMC's version of the El Camino in the '70s and '80s.

Buick Avenir Concept

As with GMC, many people questioned why GM decided to keep Buick. Since the brand is so popular in China, it was an easy decision. In recent years, Buick has been on somewhat of a hot streak when it comes to building concept cars. At the 2015 Detroit Auto Show, Buick teased us with the gorgeous Avenir Concept. The Avenir has since gone on to inspire design elements of new models such as the LaCrosse, as well as a new sub-brand for Buick. Unfortunately, the Avenir never ended up being the Buick flagship sedan we wanted it to be.

Buick Avista 2+2 Coupe Concept

Buick didn't stop with the Avenir, because one year later it dropped the even more drop-dead gorgeous Avista 2+2 Coupe Concept. This stunning coupe was set to use a twin-turbocharged V6 sending 400 hp to the rear wheels. Unfortunately, Buick said a two-door coupe like this would not sell well in China, so it was never put into production.

Cadillac Ciel Concept

Just like its corporate sibling Buick, Cadillac has been doing nothing but teasing us with stunning concept cars that it refuses to build. Back in 2011, Cadillac showed off the Ciel Concept: a flagship convertible harkening back to the company's heyday. It was set to use a twin-turbo 3.6-liter V6 mated to a hybrid drivetrain, but GM never put it into production. We'd love to see Cadillac pull the Ciel out of retirement and use it to compete against the Mercedes S-Class Convertible and upcoming BMW 8 Series.

Cadillac Elmiraj Concept

Two years later in 2013, Cadillac showed off yet another concept depicting what a luxury flagship from America could look like. The Elmiraj Concept was meant to be powered by a 4.5-liter twin-turbo V8 producing 500 hp. Though it didn't turn out to be the exact displacement, Cadillac has unveiled a new 4.2-liter twin-turbo V8 that produces 550 hp in the new CT6 V-Sport. Cadillac now has the perfect engine to power a luxury flagship like the Elmiraj, so we'd love to see it reach production.

Saturday, September 28, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 377


Reference Information



Schematic Reference



* Body Control System Schematics (See: Body and Frame/Body Control Systems/Diagrams/Electrical Diagrams)



* Power Distribution Schematics (See: Diagrams/Electrical Diagrams/Starting and Charging/Power and Ground Distribution/System



Diagram/Power Distribution Schematics)



Connector End View Reference



Component Connector End Views (See: Diagrams/Connector Views)



Description and Operation



Power Mode Description and Operation (See: Power and Ground Distribution/Description and Operation/Power Mode Description and Operation)



Electrical Information Reference



* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit



Testing/Circuit Testing)



* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic



Procedures/Connector Repairs/Connector Repairs)



* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General



Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)



* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring



Repairs/Wiring Repairs)



Scan Tool Reference



Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information



Circuit/System Verification



1. Verify that the following DTCs are not set: U1814, B1428.



锟斤拷 If either of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code



Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle).



2. With a scan tool, access Body Control Module, Power Mode data display list and compare all parameters listed with the corresponding



ignition key position. The PMM Power Mode Parameters table below illustrates the correct state of these input parameters (circuits) in



correspondence to the ignition switch position. The circuits which the individual parameters are related to are in parentheses.



Circuit/System Testing



Note: You must perform the Circuit/System Verification before proceeding with Circuit/System Testing.



1. Inspect for an B+ fuse to the ignition switch. The fuse should be OK.



锟斤拷 If the fuse is open, test the following circuits for a short to ground, if all circuits test OK, replace the BCM.



* B+



* Accessory voltage



* Off/Run/Crank voltage



* Ignition 1 voltage



* Accessory wakeup serial data (BCM output)



* Run/crank ignition 1 voltage (BCM output)



2. Disconnect the harness connector at the ignition switch.



3. Verify that a test lamp illuminates between the B+ circuit terminal 4 and ground.



锟斤拷 If the test lamp does not illuminate, test the B+ circuit for an open/high resistance.

Opel Insignia Spy Shots Have Us Wondering About The Buick Regal

What will happen to the Regal now that Opel is owned by PSA?

Last year, French automaker PSA purchased Opel and Vauxhall from General Motors. The deal had a limited impact on the US market because Opel and Vauxhall don't sell cars here. However, there may be one small hiccup for GM because the current Buick Regal Sportback and Regal TourX are both based on the Opel Insignia.

While there has been some speculation on how the PSA acquisition may affect the Buick Regal, nothing has been announced officially by GM or PSA Group.

Obviously, when the brand that designed the Buick Regal is purchased by another automaker, it calls into question how Buick could possibly continue selling and updating it. We recently received spy shots of a facelifted Insignia Sports Tourer, which is essentially the same car as the Regal TourX but without the body cladding and raised ride height.

PSA Group likely wants to make a change from the GM-designed fascia with a new grille and headlights. Rumors also suggest that the Insignia could gain new infotainment and powertrains from PSA Group.

The big question now becomes will the Buick Regal receive any of these changes? Since PSA Group is overseeing the facelift, it stands to reason that the Regal may just be left in the dark. We reached out to Buick for a statement, and a product spokesperson simply said: "We don’t speculate on future products." Perhaps even Buick doesn't know the fate of the Regal at the moment. It seems like Buick is happy to leave us in the dark, which is a shame because the Regal is a car we like very much.

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2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 483


4. Test for 3.5 - 11.5 Ohms between control circuit terminal 14 and control circuit terminal 1.



锟斤拷 If less than the specified range, test for a short between the control circuits. If the circuits test normal, replace the seat back heater element.



锟斤拷 If greater than the specified range, test the control circuits for an open/high resistance. If the circuits test normal, replace the seat back



heater element.



5. Disconnect the X2, X5 harness connectors at the MSM.



6. Test for 850 Ohms - 300 kOhms between the signal circuit terminal 4 X5 and the low reference circuit terminal 2 X2.



锟斤拷 If less than the specified range, test for a short between the signal and low reference circuits. If the circuits test normal, replace the seat



back heater element/temperature sensor.



锟斤拷 If greater than the specified range, test the signal and low reference circuits for a short to voltage or an open/high resistance. If the circuits



test normal, replace the seat back heater element/temperature sensor.



7. Connect the X1, X2, X5 harness connectors at the MSM.



8. Disconnect the harness connector at the seat back heater element/temperature sensor.



9. Ignition ON, test for 4.8 - 5.2 V between the signal circuit terminal C and ground.



锟斤拷 If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the



MSM.



锟斤拷 If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the MSM.



10. If all circuits test normal, replace the MSM.



B2180 0A, B2180 0B, B2180 0C, B2180 0D, B2180 0E, B2180 04, or B2180 1F



1. Ignition OFF, disconnect the X3 harness connector at the MSM.



2. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 5 and ground.



锟斤拷 If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.



3. Ignition OFF, connect the X3 harness connector at the MSM and disconnect the X1 harness connector at the MSM.



Important: Element resistance must be measured twice to ensure that all failure conditions are simulated. First with the seat



unoccupied, then with the seat occupied.



4. Test for 3.5 - 11.5 Ohms between control circuit terminal 6 and control circuit terminal 4.



锟斤拷 If less than the specified range, test for a short between the control circuits. If the circuits test normal, replace the seat back heater element.



锟斤拷 If greater than the specified range, test the control circuits for an open/high resistance. If the circuits test normal, replace the seat back



heater element.



5. Disconnect the X2, X5 harness connectors at the MSM.



6. Test for 850 Ohms - 300 kOhms between the signal circuit terminal 3 X5 and the low reference circuit terminal 5 X2.



锟斤拷 If less than the specified range, test for a short between the signal and low reference circuits. If the circuits test normal, replace the seat



back heater element/temperature sensor.



锟斤拷 If greater than the specified range, test the signal and low reference circuits for a short to voltage or an open/high resistance. If the circuits



test normal, replace the seat back heater element/temperature sensor.



7. Connect the X1, X2, X5 harness connectors at the MSM.



8. Disconnect the harness connector at the seat back heater element/temperature sensor.



9. Ignition ON, test for 4.8 - 5.2 V between the signal circuit terminal C and ground.



锟斤拷 If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the



MSM.



锟斤拷 If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the MSM.



10. If all circuits test normal, replace the MSM.



Repair Instructions



Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.



* Driver or Passenger Seat Back Cushion Heater Replacement (Escalade with HP2) ()Driver or Passenger Seat Back Cushion Heater



Replacement (Tahoe with HP2) ()Driver or Passenger Seat Back Cushion Heater Replacement (without HP2) ()



* Control Module References (See: Testing and Inspection/Programming and Relearning) for the MSM replacement, setup, and programming

The All-New 2017 Buick LaCrosse Is Still Your Dentist's Dream Car

Somebody had to admit it.

There’s no question Buick has been on a roll lately, with new products like the Encore and Envision, as well as older models, specifically the Regal, that’s still well regarded. But what about its flagship sedan, the newly redesigned 2017 LaCrosse? Is it still the almost but not quite all-out luxury car that adds a dose of adrenaline to an otherwise dull and Novocain numbing-like dentist’s life? Yes. And that’s exactly the way Buick wanted to keep things.

Built on the same platform that underpins the excellent Chevrolet Impala, the redesigned 2017 LaCrosse is 300 pounds lighter than its immediate predecessor, despite being longer and wider. Its exterior styling was somewhat influenced by the gorgeous Avenir Concept from Detroit a couple of years ago.

Step inside and you’ll find an interior layout that’s both premium and comfortable. From the driver’s seat, however, there’s one design flaw we noticed: the center console is simply too high, creating the feeling like you’re buckled into a confining dentist’s chair. Our tester was a nearly fully-loaded Premium trim, only missing the $3,000 all-wheel drive system. Front-wheel-drive is standard. Power comes from a GM’s fantastic 3.6-liter V6 with 310 hp and 282 lb-ft of torque. And that’s about where the excitement ends. Is the 2017 Buick LaCrosse a bad car? Not by any means. Is it a desirable car that’s fun to show off to your golf buddies? Only if you’re a dentist. Special thanks to Woodland Motors for letting us film the car.