Tire Pressure Module (TPM)
B21DD-85-SYSTEM VOLTAGE - SIGNAL ABOVE ALLOWABLE RANGE
For a complete wiring diagram, refer to the Wiring Information.
- When Monitored:
Continuously.
- Set Condition:
Any time the Tire Pressure Monitoring (TPM) Module senses voltage input above 16.0 volts for over 20ms, this code will set.
NOTE: Check for and remove any non-FCC compliant components before beginning this diagnostic procedure.
1. CHECK POWERTRAIN CONTROL MODULE (PCM) DTCs
1. With the scan tool, read PCM DTCs.
Are there any battery or charging system DTCs present?
Yes
- Testing and Inspection and perform the appropriate diagnostic procedure.
No
- Go To 2
2. VERIFY THE DTC IS ACTIVE
1. With the scan tool, record and erase stored DTCs.
2. Start the engine and run for two minutes.
3. With the scan tool, read DTCs.
Is the DTC active at this time?
Yes
- Replace the Tire Pressure Monitoring (TPM) Module. Tire Pressure Monitoring (TPM) Module - Removal.
- Perform the TPM VERIFICATION TEST. TPM Verification.
No
- The conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
- Perform the TPM VERIFICATION TEST. TPM Verification.
3. INTERMITTENT WIRING AND CONNECTORS
1. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
2. Wiggle test the wiring harness and connectors while monitoring the scan tool data relative to this circuit.
3. Look for the data to change or for the DTC to reset during the wiggle test.
4. While monitoring the scan tool data relative to this circuit.
5. Look for the data to change other than as expected or for the DTC to reset.
Were any problems found?
Yes
- Repair as necessary.
- Perform the TPM VERIFICATION TEST. TPM Verification.
No
- The conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
- Perform the TPM VERIFICATION TEST. TPM Verification.