Circuit/System Testing
- With the ignition OFF, disconnect the EBCM harness connector and connect a test lamp between the battery positive voltage circuit terminal going to the ABS pump motor and to ground. It is important that the test lamp is connected before the ignition is turned ON.
- With the ignition ON, verify that the test lamp illuminates.
- If the test lamp does not illuminate, repair the open or high resistance in the battery positive voltage circuit.
- Connect a test lamp between the battery positive voltage circuit and pump motor ground circuit at the EBCM connector, verify that the test lamp illuminates.
- If the test lamp does not illuminate, repair the open or high resistance in the pump motor ground circuit.
- With ignition OFF, separate the EBCM from the BPMV
- Inspect the EBCM to BPMV connector for conditions such as damage, corrosion, or presence of brake fluid.
- If connector corrosion or damage is evident, replace BPMV and/or EBCM as necessary.
- If brake fluid is present, replace both BPMV and EBCM.
- Connect the EBCM harness to the EBCM with the BPMV still separated.
- Connect a test lamp between the pump motor circuits, the internal EBCM connector.
- With ignition ON, use the scan tool to perform the Pump Motor Test.
- If test lamp illuminates replace the BPMV.
- If test lamp does not illuminate replace the EBCM and BPMV.