B121B

B121B-RIGHT HEATED SEAT HI INDICATOR CONTROL CIRCUIT OPEN





For a complete wiring diagram Refer to Diagrams/Electrical.

- When Monitored:Continuously with the ignition on.
- Set Condition:This code is set immediately when the Cluster detects low voltage on the heated seat indicator control circuit.





Diagnostic Test

1.VERIFY THAT DTC B121B-RIGHT HEATED SEAT HI INDICATOR CONTROL CIRCUIT OPEN IS ACTIVE

With the scan tool, record and erase DTC's

Operate the Heated Seat Switch in both positions several times.

With the scan tool, read DTC's.

Does the DTC B121B-RIGHT HEATED SEAT HI INDICATOR CONTROL CIRCUIT OPEN 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 - VER 1. Body Verification Test

2.INSPECT PDC FUSES

Check PDC fuses #8 and #40.

Is either fuse open?

Yes

- Check for a possible short to ground on the (F23) Fused Ignition Switch Output (Run-Start) Circuit and replace the fuse as necessary.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Go To 3

3.DISCONNECT THE CLUSTER C3 CONNECTOR AND CHECK FOR VOLTAGE





Reinstall fuse if removed in previous test.

Disconnect the Cluster C3 connector.

NOTE: Check connectors - Clean and repair as necessary.

Turn the ignition on.

Measure the voltage at the (P84) Right Heated Seat High Indicator Driver circuit at the Cluster C3 connector.

Is the voltage above 10.0 volts?

Yes

- Replace the Cluster.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Go To 4

4.CHECK THE (F23) FUSED IGNITION SWITCH OUTPUT (RUN-START)





Disconnect the Right Heated Seat switch connector.

NOTE: Check connectors - Clean and repair as necessary.

Turn the ignition on.

Measure the voltage of the (F23) Fused Ignition Switch Output (Run-Start ) circuit at the Right Heated Seat Switch connector.

Is the voltage above 10.0 volts ?

Yes

- Go To 5

No

- Repair the (F23) Fused Ignition Switch Output (Run-Start ) circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

5.CHECK THE (P84) RIGHT HEATED SEAT HIGH INDICATOR DRIVER CIRCUIT FOR A SHORT TO GROUND





Measure the resistance between ground and the (P84) Right Heated Seat High Indicator Driver circuit.

Was the resistance below 5.0 ohms?

Yes

- Repair the (P84) Right Heated Seat High Indicator Driver circuit for a short to ground
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Go To 6

6.CHECK THE (P84) RIGHT HEATED SEAT HIGH INDICATOR DRIVER CIRCUIT FOR AN OPEN





Measure the resistance of the (P84) Right Heated Seat High Indicator Driver circuit between the Cluster C3 connector and the Right Heated Seat Switch connector.

Is the resistance below 5.0 ohms?

Yes

- Replace the Right Heated Seat Switch.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Repair the (P84) Right Heated Seat High Indicator Driver circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test