Monday, June 24, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 282


Scan Tool Reference



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



Circuit/System Verification



1. Verify that DTC B1405 is not set.



锟斤拷 If DTC is set, refer to DTC B1405 (See: B1405).



2. Verify that DTC B0958 3A, DTC B0959 3A, DTC B0960 3A, or DTC B0961 3A is not set.



锟斤拷 If DTC is set, replace the appropriate object alarm sensor.



3. Transmission in REVERSE, verify the parking assist system is enabled and one audible beep sounds.



Circuit/System Testing



Single Object Alarm Sensor DTC Set



1. Ignition OFF, disconnect the harness connector at the appropriate object alarm sensor.



2. Ignition OFF for 30 seconds, test for less than 20 Ohms between the low reference circuit terminal 2 and ground.



锟斤拷 If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the object



alarm module.



3. Ignition ON, transmission in REVERSE, test for 8.0-9.0 V between the voltage reference circuit terminal 1 and ground.



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



alarm module.



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



replace the object alarm module.



4. Ignition OFF, remove the malfunctioning object alarm sensor and swap locations with another properly functioning object alarm sensor.



Connect the harness connector at both sensors.



5. Ignition ON, verify the DTC is set for the new location in which the malfunctioning object alarm sensor is installed.



锟斤拷 If the DTC does not set for the new location, test the signal circuit terminal 3 for a short to voltage, short to ground, or an open/high



resistance. If the circuit tests normal, replace the object alarm module.



6. If the DTC sets for the new location in which the malfunctioning object alarm sensor is installed, replace the appropriate object alarm sensor.



Multiple Object Alarm Sensor DTCs Set



1. Ignition OFF, disconnect the harness connector at each of the object alarm sensors.



2. Ignition OFF for 30 seconds, test for less than 20 Ohms between the low reference circuit terminal 2 and ground.



锟斤拷 If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the object



alarm module.



3. Ignition ON, transmission in REVERSE, test for 8.0-9.0 V between the voltage reference circuit terminal 1 and ground.



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



alarm module.



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



replace the object alarm module.



Repair Instructions



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



* Rear Object Sensor Replacement (See: Accessories and Optional Equipment/Collision Avoidance and Parking Assist Systems/Parking Assist



Distance Sensor/Service and Repair/Rear Object Sensor Replacement)



* Control Module References (See: Testing and Inspection/Programming and Relearning) for object alarm module replacement, setup, and



programming



B0961



DTC B0958, B0959, B0960, or B0961



Diagnostic Instructions

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