P0504

P0504-BRAKE SWITCH A/B CORRELATION

For a complete wiring diagram, refer to the Wiring Information.

- When Monitored:
With the ignition on.

- Set Condition:
The Powertrain Control Module (PCM) detects a plausibility error is present in the brake information received from the ABS Module.





Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Pre-Diagnostic Troubleshooting Procedure.

Diagnostic Test

1. CHECK FOR ACTIVE DIAGNOSTIC TROUBLE CODE (DTC)
1. Turn the ignition on.
2. With the scan tool, read PCM DTCs.

Is the DTC active?

Yes

- Go To 2

No

- Perform the INTERMITTENT DTC diagnostic procedure. Intermittent Condition Test

2. CHECK FOR ABS MODULE DTCS
1. Turn the ignition on.
2. With the scan tool, read ABS Module DTCs.

Are there any Brake Switch Sensor DTCs present?

Yes

- Perform the appropriate diagnostic procedure.

No

- Go To 3

3. POWERTRAIN CONTROL MODULE (PCM)
1. Look for any chafed, pierced, pinched or partially broken wires.
2. Look for broken, bent, pushed out or corroded terminals.
3. Perform any Technical Service Bulletins that may apply.

Were any problems found?

Yes

- Repair as necessary.
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test.

No

- Replace the Powertrain Control Module (PCM).
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test.