Saturday, June 22, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 7


The serial data gateway module has not received a valid state of health message from the high voltage circuit impact detector sensor for 2.5 seconds.



B009F 3A



The wrong high voltage circuit impact detector sensor has been installed.



B009F 4A



The serial data gateway module calibration does not match the vehicle configuration.



B009F 73



The serial data gateway module has received invalid serial data from the high voltage circuit impact detector sensor.



Action Taken When the DTC Sets



The driver information center (DIC) displays the SERVICE HYBRID SYSTEM message.



Conditions for Clearing the DTC



* A current DTC clears when the malfunction is no longer present.



* The DIC message turns OFF when the DTC passes.



* A history DTC clears when the module ignition cycle counter reaches the reset threshold of 50, without a repeat of the malfunction.



Diagnostic Aids



* The high voltage circuit impact detector sensor has many different internal configurations in the same external package. Ensure that the correct



sensor part number is installed with the correct software programmed in the serial data gateway module.



* Turn the ignition OFF for 1 minute before using a scan tool to clear the DTC from the serial data gateway module. If the ignition is not OFF



for 1 minute, the DTC may not clear.



Reference Information



Schematic Reference



Data Communication Schematics (See: Powertrain Management/Computers and Control Systems/Information Bus/Diagrams/Electrical Diagrams)



Connector End View Reference



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



Description and Operation



Drive Motor Generator Control Module 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 DTC B009F 00, B009F 4A, or B009F 73 is not set.



锟斤拷 If the DTC is set, program the serial data gateway module. If the DTC resets, replace the serial data gateway module.



2. Verify the serial data gateway module is programmed with the correct software calibration.



锟斤拷 If the correct software is not installed, program the serial data gateway module.



3. Ignition ON, observe the scan tool Hybrid Crash Sensor 1 parameter. The reading should be No Crash.



锟斤拷 If not No Crash, refer to Circuit/System Testing.

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