B2181-HEATED SEAT MODULE POWER SUPPLY LOW
For a complete wiring diagram, refer to the Wiring Information.
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When Monitored:
During heated seat operation.
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Set Condition:
This code is set immediately if the Heated Seat Module (HSM) detects voltage under 10 volts on the (P693) Fused Run Relay Output circuit.
Possible Causes |
|---|
| (P693) FUSED RUN RELAY OUTPUT CIRCUIT HIGH RESISTANCE |
| HEATED SEAT MODULE |
1. CHECK PCM FOR CHARGING SYSTEM DTC
| 1. | Turn the ignition on. |
| 2. | With the scan tool, read PCM DTCs. |
Are there any Charging System DTCs set in the PCM?
Yes
- (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Diagnosis and Testing) for Charging System diagnostic procedures.
No
- Go To 2
| 1. | With the scan tool, clear all DTCs. |
| 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 DTCs. |
Does the scan tool display this DTC as active?
Yes
- Go To 3
No
- Test complete, the condition or conditions that originally set this DTC are not present at this time. 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.
- Perform BODY VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure).
3. (P693) FUSED RUN RELAY OUTPUT CIRCUIT HIGH RESISTANCE
| 1. | Start the engine and let idle. |
| 2. | Disconnect the Heated Seats Module harness connector. |
| 3. | Using a 12-volt test light connected to ground, check the (P693) Fused Run Relay Output circuit. |
| 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 (HSM) in accordance with the Service Information.
- Perform BODY VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure).
No
- Repair the (P693) Fused Ignition Switch Output (Run) circuit as necessary.
- Perform BODY VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure).