2010 Cadillac Truck SRX AWD V6-3.0L Page 789
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* A short to ground or an open/high resistance is detected on the pump motor B+ circuit for 1.8 s.
* A faulty pump motor is detected.
Action Taken When the DTC Sets
* The EBCM disables the ABS, traction control and stability control for the duration of the ignition cycle.
* The ABS indicator turns ON.
* The traction control/stability control-active indicator turns ON.
* The brake warning indicator turns ON.
Conditions for Clearing the DTC
* A current DTC clears when the diagnostic runs and passes.
* The EBCM will turn OFF the indicators in the next ignition cycle.
Reference Information
Schematic Reference
Antilock Brake System Schematics (See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Diagrams/Electrical Diagrams)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)
Description and Operation
ABS Description and Operation (See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/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
1. Ignition OFF, disconnect the harness connector at the K17 Electronic Brake Control Module (EBCM).
2. Test for less than 1 ohm between the ground circuit terminal 16 and ground.
瀚慖f greater than the specified value, test the ground circuit for an open/high resistance.
3. Verify that a test lamp illuminates between the B+ circuit terminal 1 and ground.
瀚慖f the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
4. Ignition OFF, remove the K17 Electronic Brake Control Module (EBCM) from the Q5 brake pressure modulator valve assembly.
5. Inspect the K17 Electronic Brake Control Module (EBCM) to Q5 brake pressure modulator valve assembly connector for damage, corrosion,
or presence of brake fluid.
瀚慖f connector corrosion or damage is diagnosed, replace the Q5 brake pressure modulator valve assembly and/or K17 Electronic Brake
Control Module (EBCM) as necessary.
瀚慖f brake fluid is present, replace theQ5 brake pressure modulator valve assembly and the K17 Electronic Brake Control Module (EBCM).
6. Connect the K17 Electronic Brake Control Module (EBCM) harness connector with the Q5 brake pressure modulator valve assembly still
separated.
7. Connect a test lamp between the pump motor circuits terminals.
8. Ignition ON, command the ABS Pump Motor Increase and Decrease with a scan tool, verify the test lamp illuminates when commanded.
瀚慖f test lamp does not illuminate, replace the K17 Electronic Brake Control Module (EBCM).
9. If all circuits test normal, replace the Q5 brake pressure modulator valve assembly and verify the DTC does not reset.
