Circuit/System Testing
WARNING: This page is about a different car, the 2010 Cadillac SRX. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, disconnect the harness connector at the K17 Electronic Brake Control Module (EBCM).
- Test for less than 1 Ω between the ground circuit terminal 16 and ground.
- If greater than the specified value, test the ground circuit for an open/high resistance.
- Verify that a test lamp illuminates between the B+ circuit terminal 1 and ground.
- If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
- Ignition OFF, remove the K17 Electronic Brake Control Module (EBCM) from the Q5 brake pressure modulator valve assembly.
- Inspect the K17 Electronic Brake Control Module (EBCM) to Q5 brake pressure modulator valve assembly connector for damage, corrosion, or presence of brake fluid.
- If connector corrosion or damage is diagnosed, replace the Q5 brake pressure modulator valve assembly and/or K17 Electronic Brake Control Module (EBCM) as necessary.
- If brake fluid is present, replace the Q5 brake pressure modulator valve assembly and the K17 Electronic Brake Control Module (EBCM).
- Connect the K17 Electronic Brake Control Module (EBCM) harness connector with the Q5 brake pressure modulator valve assembly still separated.
- Connect a test lamp between the pump motor circuits terminals.
- Ignition ON, command the ABS Pump Motor Increase and Decrease with a scan tool, verify the test lamp illuminates when commanded.
- If test lamp does not illuminate, replace the K17 Electronic Brake Control Module (EBCM).
- If all circuits test normal, replace the Q5 brake pressure modulator valve assembly and verify the DTC does not reset.
- If the DTC resets, replace the K17 Electronic Brake Control Module (EBCM).