B10C4-13
B10C4-13-HEATED STEERING WHEEL CONTROL - CIRCUIT OPEN
- When Monitored:
With the engine running.
- Set Condition:
The Heated Seat Module (HSM) detects current below threshold on the (C91) Heated Steering Wheel Feed circuit for more than two seconds when the output is turned on.
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. Turn the HSW on.
6. 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 rotating the steering wheel. Attempt to reproduce condition by adjusting the seat.
- Perform the BODY VERIFICATION TEST. Body Verification Test.
2. CHECK FOR AN OPEN HSW
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. Measure the resistance between the (C91) Heated Steering Wheel Feed circuit and the (C986) Heated Steering Wheel Return circuit at the Steering Wheel Heater (component side) connector.
Is the resistance 1.85 ± 0.2 Ohms?
Yes
- Go To 3
No
- Replace the Heated Steering Wheel (HSW).
- Perform the BODY VERIFICATION TEST. Body Verification Test.
3. CHECK (C91) HEATED STEERING WHEEL FEED CIRCUIT FOR AN OPEN
1. Disconnect the HSM C4 connector.
NOTE: Check connectors. Clean and repair as necessary.
2. Measure the resistance of the (C91) Heated Steering Wheel Feed circuit between the Steering Wheel Heater connector and the HSM C4 connector.
Is the resistance below 5.0 Ohms?
Yes
- Go To 4
No
- Go To 5
4. CHECK (C986) HEATED STEERING WHEEL RETURN CIRCUIT OPEN FOR AN OPEN
1. Measure the resistance of the (C986) Heated Steering Wheel Return circuit between the Steering Wheel Heater connector and the HSM C4 connector.
Is the resistance below 5.0 Ohms?
Yes
- Replace the Heated Seat Module (HSM).
- Perform the BODY VERIFICATION TEST. Body Verification Test.
No
- Go To 6
5. CHECK (C91) HEATED STEERING WHEEL FEED CIRCUIT FOR AN OPEN BETWEEN SCM AND HSM
1. Disconnect the SCM C5 connector.
NOTE: Check connectors. Clean and repair as necessary.
2. Measure the resistance of the (C91) Heated Steering Wheel Feed circuit between the SCM C5 connector and the HSM C4 connector.
Is the resistance below 5.0 Ohms?
Yes
- Replace the Steering Control Module (SCM).
- Perform the BODY VERIFICATION TEST. Body Verification Test.
No
- Repair the (C91) Heated Steering Wheel Feed circuit for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test.
6. CHECK (C986) HEATED STEERING WHEEL RETURN CIRCUIT FOR AN OPEN BETWEEN SCM AND HSM
1. Disconnect the SCM C5 connector.
NOTE: Check connectors. Clean and repair as necessary.
2. Measure the resistance of the (C986) Heated Steering Wheel Return circuit between the SCM C5 connector and the HSM C4 connector.
Is the resistance below 5.0 Ohms?
Yes
- Replace the Steering Control Module (SCM).
- Perform the BODY VERIFICATION TEST. Body Verification Test.
No
- Repair the (C986) Heated Steering Wheel Return circuit for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test.