B121A

B121A-RIGHT HEATED SEAT HI INDICATOR CONTROL CIRCUIT HIGH





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

- When Monitored:
Continuously with the ignition on.

- Set Condition:
This code is set immediately when the Cluster detects excessive voltage on the heated seat indicator control circuit.





1. VERIFY THAT DTC B121A-RIGHT HEATED SEAT SWITCH HI INDICATOR CONTROL CIRCUIT HIGH IS ACTIVE
1. With the scan tool, record and erase DTC's
2. Operate the Heated Seat Switch in both positions several times.
3. With the scan tool, read DTC's.

Does the DTC B121A-RIGHT HEATED SEAT HI INDICATOR CONTROL CIRCUIT HIGH reset?

Yes

- Go To 2

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 BODY VERIFICATION TEST. Body Verification Test.

2. DISCONNECT THE RIGHT HEATED SEAT SWITCH AND RE-READ DTC
1. Disconnect the Right Heated Seat Switch connector.
2. With the scan tool erase DTC's
3. Cycle the ignition switch off then back on.
4. With the scan tool, read DTC's.

Does the DTC B121A-RIGHT HEATED SEAT HI INDICATOR CONTROL CIRCUIT HIGH reset?

Yes

- Go To 3

No

- Replace the Right Heated Seat switch.
- Perform BODY VERIFICATION TEST. Body Verification Test.

3. DISCONNECT THE CLUSTER C-3 CONNECTOR AND CHECK FOR VOLTAGE




1. Disconnect the Cluster C-3 connector.

NOTE: Check connectors - Clean and repair as necessary.

2. Turn the ignition on.
3. Measure the voltage at the (P84) Right Heated Seat High Indicator Driver circuit at the Cluster C-3 connector.

Is there any voltage present?

Yes

- Repair the (P84) Right Heated Seat High Indicator Driver circuit for a short to battery.
- Perform BODY VERIFICATION TEST. Body Verification Test.

No

- Replace the Cluster.
- Perform BODY VERIFICATION TEST. Body Verification Test.