Test Description
The numbers below refer to the step numbers on the diagnostic table.
- 2: This step tests the PCM TRC - high and TRC - low circuits to the EBCM for an open, high resistance, or short.
- 3: This step tests the PCM ENG - high and ENG - low circuits to the EBCM for an open, high resistance, or short.
- 4: Test the PCM ground circuits for an open or high resistance.
DTC C1203
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: ABS Schematics Connector End View Reference: ABS Connector End Views |
|||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 | Test the powertrain control module (PCM) TRC - high and TRC - low circuits to the electronic brake control module (EBCM) for an open, high resistance, or short. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 6 | Go to Step 3 |
| 3 | Test the PCM ENG - high and ENG - low circuits to the EBCM for an open, high resistance, or short. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 6 | Go to Step 4 |
| 4 | Test the PCM ground circuits for an open or high resistance. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 6 | Go to Step 5 |
| 5 | Replace the brake pressure modulator valve (BPMV). Refer to Brake Modulator Assembly Replacement (Without VSC) or Brake Modulator Assembly Replacement (With VSC) . Did you complete the replacement? |
Go to Step 6 | - |
| 6 |
|
Go to Step 2 | System OK |