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Home >> Chrysler >> 2011 >> 300 C, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 153 (Heated Seat Module (HSM) - Electrical Diagnostics) >> DTC Troubleshooting >> B10C4-11-Heated Steering Wheel Control - Circuit Short To Ground >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2012 RAM Pickup and 2012 RAM Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
  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. With the 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. With the 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. Refer to BODY VERIFICATION TEST .
  2. CHECK FOR SHORTED (C91) HEATED STEERING WHEEL FEED CIRCUIT BETWEEN CLOCKSPRING AND HSM 
    Fig 1: Check For Shorted Heated Steering Wheel Feed Circuit Between Clockspring And HSM
    GC0148698Courtesy of CHRYSLER GROUP, LLC
    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. Disconnect the Clockspring C5 harness connector.
      WARNING:

      Turn the ignition on, then reconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.

    2. With the scan tool, erase DTCs.
    3. Start the engine and let it run.
    4. Turn the HSW on.
    5. With the scan tool, read DTCs.

      Is the same DTC active?

      Yes 

      • Go To  3.

      No 

      • Go To  5.
  3. CHECK (C91) HEATED STEERING WHEEL FEED CIRCUIT FOR A SHORT TO GROUND 
    Fig 2: Check Heated Steering Wheel Feed Circuit For A Short To Ground
    GC0148693Courtesy of CHRYSLER GROUP, LLC
    1. Turn the ignition off.
    2. Disconnect the HSM C4 harness connector.
      NOTE:

      Check connectors. Clean and repair as necessary.

    3. Measure the resistance of the (C91) Heated Steering Wheel Feed circuit between ground and the Clockspring C5 harness connector.

      Is the resistance below 10k Ohms?

      Yes 

      • Repair the short to ground in the (C91) Heated Steering Wheel Feed circuit.
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .

      No 

      • Go To  4.
  4. CHECK (C91) HEATED STEERING WHEEL FEED CIRCUIT FOR A SHORT TO THE (C986) HEATED STEERING WHEEL RETURN CIRCUIT 
    Fig 3: Check Heated Steering Wheel Feed Circuit For A Short To The Heated Steering Wheel Return Circuit
    GC0148691Courtesy of CHRYSLER GROUP, LLC
    1. Measure the resistance between the (C91) Heated Steering Wheel Feed circuit and the (C986) Heated Steering Wheel Return circuit at the Clockspring C5 harness connector.

      Is the resistance below 10k Ohms?

      Yes 

      • Repair the short between the (C91) Heated Steering Wheel Feed circuit and the (C986) Heated Steering Wheel Return circuit.
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .

      No 

      • Replace the Heated Seat Module (HSM) in accordance with the Service Information.
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  5. CHECK FOR A SHORTED HSW 
    Fig 4: Checking HSW For Short
    GC0090164Courtesy of CHRYSLER GROUP, LLC
    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 in accordance with the Service Information.
    2. Disconnect the CLOCKSPRING C5 connector.
      NOTE:

      Before proceeding, thoroughly inspect the wiring harness and connectors between the HSW and the Clockspring. Look for chafed, pierced, pinched, or partially broken wires and broken, bent, pushed out, spread, corroded, or contaminated terminals.

    3. Reconnect the CLOCKSPRING C5 harness connector.
      WARNING:

      Turn the ignition on, then reconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.

    4. With the scan tool, erase DTCs.
    5. Turn the ignition off.
    6. Start the engine and let it run.
    7. Turn the HSW on.
    8. With the scan tool, read DTCs.

      Is the same DTC active?

      Yes 

      • Replace the Clockspring in accordance with the Service Information.
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .

      No 

      • Replace the Heated Steering Wheel (HSW) in accordance with the Service Information.
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
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