B2181

B2181-HEATED SEAT MODULE POWER SUPPLY LOW





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

- When Monitored:
Ignition on.

- Set Condition:
If the Heated Seat Module (HSM) detects voltage under 10 volts on the (P693) Fused Run Relay Output circuit.





1. CHECK FOR CHARGING SYSTEM DIAGNOSTIC TROUBLE CODES (DTCs)
1. Turn the ignition on.
2. With the scan tool, read Powertrain Control Module (PCM) DTCs.

Are there any Charging System DTCs set in the PCM?

Yes

- Testing and Inspection and Testing and Inspection for Charging System diagnostic procedures.

No

- Go To 2

2. VERIFY DTC B2181-HEATED SEAT MODULE POWER SUPPLY LOW IS ACTIVE
1. With the scan tool, record and erase DTCs.
2. Turn the ignition off.
3. Start the engine and let it run for one minute.
4. With the scan tool, read DTCs.

Does DTC B2181-HEATED SEAT MODULE POWER SUPPLY LOW reset?

Yes

- Go To 3

No

- The conditions that caused this code to set are not present at this time. Verify that the seat harness is routed correctly to the HSM. 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. Attempt to reproduce condition by adjusting the seat.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

3. CHECK (P693) FUSED RUN RELAY OUTPUT CIRCUIT VOLTAGE




1. Turn the ignition off.
2. Disconnect the HSM harness connector.

NOTE: Check connectors - Clean and repair as necessary.

3. Start the engine.
4. Allow the engine to idle.
5. Measure the voltage of the (P693) Fused Run Relay Output circuit between the HSM connector and ground and compare it to the voltage at the vehicle battery.

Is the voltage measured at the HSM connector the same as the voltage measured at the battery?

Yes

- Replace the Heated Seat Module (HSM).
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Repair the (P693) Fused Run Relay Output circuit for the cause of the low voltage condition at the HSM.
- Perform the BODY VERIFICATION TEST. Body Verification Test.