B2181

B2181-HEATED SEAT MODULE POWER SUPPLY LOW







- When Monitored:
During heated seat operation.

- Set Condition:
This code is set immediately if the Heated Seat Module detects voltage under 10 volts on the (F937) Fused Ignition Switch Output (Run) circuit.





1. CHECK ECM/PCM FOR CHARGING SYSTEM DTC
1. With the scan tool, read Powertrain Control Module DTC's.

Are there any Charging System DTC's set in the ECM/PCM?

Yes

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

No

- Go To 2

2. VERIFY THAT DTC B2181-HEATED SEAT MODULE POWER SUPPLY LOW IS ACTIVE
1. With the scan tool, record and erase DTC's
2. Turn the ignition switch to the Off position then start the engine and operate the heated seats for one minute.
3. With the scan tool, read DTC's.

Does the 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. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
- Perform BODY VERIFICATION TEST. Body Verification Test.

3. (F937) FUSED IGNITION SWITCH OUTPUT (RUN) CIRCUIT HIGH RESISTANCE




1. Disconnect the Heated Seat Module connector.

NOTE: Check connectors - Clean and repair as necessary.

2. Start the engine and let idle.
3. Using a 12-volt test light connected to ground, check the (F937) Fused Ignition Switch Output (Run) circuit at the HSM connector.

NOTE: The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery.

Does the test light illuminate brightly?

Yes

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

No

- Repair the (F937) Fused Ignition Switch Output (Run) circuit as necessary.
- Perform BODY VERIFICATION TEST. Body Verification Test.