B10C4-12
B10C4-12-HEATED STEERING WHEEL CONTROL - CIRCUIT SHORT TO BATTERY
- When Monitored:
With the engine running.
- Set Condition:
The Heated Seat Module (HSM) detects Voltage on the (C91) Heated Steering Wheel Feed circuit for more than two seconds with the output turned off.
1. TEST FOR INTERMITTENT CONDITION
NOTE: Make sure the battery is fully charged and the charging system is operating properly before proceeding.
1. Turn the ignition on.
2. Using a scan tool, record and erase Diagnostic Trouble Codes (DTCs).
3. Turn the ignition off.
4. Start the engine and let it run.
5. Using a scan tool, read DTCs.
Is the DTC active?
Yes
- Go To 2
No
- The conditions that caused this code to set are not present at this time. Verify seat harness is routed correctly to the HSM. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors. Look for chafed, pierced, pinched, or partially broken wires and broken, bent, pushed out, spread, corroded, or contaminated terminals. Attempt to reproduce condition by operating all HSM functions one at a time, except for the HSW. Attempt to reproduce condition by rotating the steering wheel. Attempt to reproduce condition by adjusting the seat.
- Perform the BODY VERIFICATION TEST. Body Verification Test.
2. CHECK FOR SHORTED (C91) HEATED STEERING WHEEL FEED CIRCUIT BETWEEN SCM AND HSM
1. Turn the ignition off.
2. Remove the upper steering column shroud.
3. Disconnect the SCM C5 connector.
NOTE: Check connectors. Clean and repair as necessary.
4. Start the engine and let it run.
5. Measure the Voltage of the (C91) Heated Steering Wheel Feed circuit between the SCM C5 connector and ground.
Is there any Voltage present?
Yes
- Go To 3
No
- Go To 5
3. CHECK (C91) HEATED STEERING WHEEL FEED CIRCUIT FOR A SHORT TO (F931) FUSED IGNITION RUN CONTROL OUTPUT
1. Turn the ignition off.
2. Disconnect the HSM C4 connector.
NOTE: Check connectors. Clean and repair as necessary.
3. Measure the resistance between the (C91) Heated Steering Wheel Feed circuit and the (F931) Fused Ignition Run Control Output circuit at the HSM C4 connector.
Is the resistance below 10K Ohms?
Yes
- Repair the (C91) Heated Steering Wheel Feed circuit for a short to the (F931) Fused Ignition Run Control Output circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.
No
- Go To 4
4. CHECK (C91) HEATED STEERING WHEEL FEED CIRCUIT FOR A SHORT TO VOLTAGE
1. Turn the ignition on.
2. Measure the Voltage of the (C91) Heated Steering Wheel Feed circuit between the HSM C4 connector and ground.
Is there any Voltage present?
Yes
- Repair the (C91) Heated Steering Wheel Feed circuit for a short to Voltage.
- Perform the BODY VERIFICATION TEST. Body Verification Test.
No
- Replace the Heated Seat Module (HSM).
- Perform the BODY VERIFICATION TEST. Body Verification Test.
5. CHECK FOR A SHORTED SCM
WARNING: Turn the ignition off, disconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.
1. Remove the Driver Airbag.
2. Disconnect the Steering Wheel Heater connector. NOTE: Before proceeding, thoroughly inspect the wiring harness and connectors between the HSW and the Steering Control Module. Look for chafed, pierced, pinched, or partially broken wires and broken, bent, pushed out, spread, corroded, or contaminated terminals.
3. Reconnect the SCM C5 connector.
WARNING: Turn the ignition on, then reconnect the 12-volt battery. Failure to follow these instructions may result in possible serious or fatal injury.
4. Start the engine and let it run.
5. Measure the Voltage of the (C91) Heated Steering Wheel Feed circuit between the Steering Wheel Heater connector and ground.
Is there any Voltage present?
Yes
- Replace the Steering Control Module (SCM).
- Perform the BODY VERIFICATION TEST. Body Verification Test.
No
- Replace the Heated Seat Module (HSM).
- Perform the BODY VERIFICATION TEST. Body Verification Test.