C121D

C121D-BRAKE PRESSURE SENSOR CIRCUIT

- When Monitored:
With the ignition on.

- Set Condition:
When the Anti-Lock Brake Module indicates that the Brake Pressure Sensor Signal is out of range.





Diagnostic Test

1. CHECK FOR A DTC C121D-BRAKE PRESSURE SENSOR CIRCUIT
NOTE: This DTC must be active for the results of this test to be valid.

Turn the ignition on.
With the scan tool, read and record DTCs.
With the scan tool, read and record Freeze Frame information.
With the scan tool, erase DTCs.
Start the engine.
Depress firmly and release the brake pedal.
With the scan tool, read and record DTCs.
Does the scan tool display: C121D-BRAKE PRESSURE SENSOR CIRCUIT?

Yes

- Go To 2

No

- REFER TO the INTERMITTENT CONDITION diagnostic procedure. Checking For An Intermittent DTC.
- REFER TO the ABS-INTERMITTENT CONDITION TEST. ABS Intermittent Condition Test.

2. RECHECK FOR A DTC C121D-BRAKE PRESSURE SENSOR CIRCUIT
Turn the ignition on.
With the scan tool, read and record DTCs.
With the scan tool, read and record Freeze Frame information.
With the scan tool, erase DTCs.
Start the engine.
Depress firmly and release the brake pedal.
With the scan tool, read and record DTCs.
Does the scan tool display: C121D-BRAKE PRESSURE SENSOR CIRCUIT?

Yes

- Replace the ICU.
- PERFORM ABS VERIFICATION TEST. ABS Verification Test

No

- Test complete