C1082-2F

C1082-2F-VACUUM PRESSURE SENSOR - SIGNAL ERRATIC





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

- When Monitored:
Ignition On, Continuous

- Set Condition:
The erratic vacuum pressure sensor fault is set when the ABS module detects multiple quick voltage transitions to faulted levels.





NOTE: If any other DTCs are present, repair them first before continuing with this diagnostic procedure.

1. VERIFY THE DTC IS ACTIVE
1. Perform any Technical Service Bulletins (TSBs) that may apply.
2. Ignition on, engine not running.
3. With the scan tool, erase DTCs.
4. Cycle the ignition switch from off to on.
5. With the scan tool, select View DTCs.

Is the DTC active at this time?

Yes

- Go To 2

No

- The condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires.
- Perform the ABS-INTERMITTENT CONDITION TEST. Testing and Inspection.

2. INSPECT RELATED WIRING HARNESS, TERMINALS, AND CONNECTORS
1. Perform any Technical Service Bulletins (TSBs) that may apply.
2. Review the scan tool Environmental Data (EV Data). If possible, try to duplicate the conditions under which the DTC set.
3. Turn the ignition off.
4. Visually inspect the related wire harness. Disconnect all the related harness connectors. Look for any chafed, pierced, pinched, partially broken wires and broken, bent, pushed out, or corroded terminals.
5. Wiggle the wires while checking for shorts and open circuits.
6. Inspect and clean all ABS, engine, and chassis grounds that are related to the most current DTC.

Were any problems found?

Yes

- Repair as necessary.
- Perform the ABS VERIFICATION TEST. ABS Verification Test.

No

- Go To 3

3. ANTI-LOCK BRAKE SYSTEM (ABS) MODULE
1. Turn the ignition off to the lock position.
2. Replace the Vacuum Pressure Sensor.
3. Perform the ABS VERIFICATION TEST. ABS Verification Test.
4. With the scan tool, read the DTCs.

Is the DTC still active?

Yes

- Replace the Anti-Lock Brake System (ABS) Module. Anti-Lock Brake System Module - Removal.
- Perform the ABS VERIFICATION TEST. ABS Verification Test.

No

- Test complete, the condition or conditions that originally set this DTC are not present at this time.