Diagnostic Test

CHECK FOR AN ACTIVE DTC
NOTE:
If any Steering Column Control Module (SCCM) DTCs are set against the Left Steering Wheel switch. Repair those DTCs first before proceeding.
1. Turn the ignition on.
2. With the scan tool, record Heated Seat Module (HSM) DTCs and record on the work order.
3. With the scan tool, erase HSM DTCs.
4. Turn the ignition off.
5. Start the engine.
6. Turn the Heated Steering Wheel (HSW) on.
7. With the scan tool, read HSM DTCs.
  Does the DTC return?
  
  Yes
  - Go To 2
  No
  - Perform the TESTING FOR AN INTERMITTENT CONDITION procedure. Refer to TESTING FOR AN INTERMITTENT CONDITION .
CHECK FOR AN OPEN OR SHORTED HEATED STEERING WHEEL TEMPERATURE SENSOR
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 Heated Steering Wheel (HSW) harness connector.
3. Before proceeding, thoroughly inspect the wiring harness and connectors between the HSW and the Left Steering Wheel Switch. Look for chafed, pierced, pinched, or partially broken wires and broken, bent, pushed out, spread, corroded, or contaminated terminals and repair as necessary. If no problems were found, continue.
  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. Measure the voltage between the (C92) Heated Steering Wheel Signal circuit and the (Z92) Ground circuit at the Heated Steering Wheel harness connector.
  Is the voltage between 4.8 and 5.2 volts?
  
  Yes
  - Replace the Heated Steering Wheel (HSW) in accordance with the Service Information. Refer to WHEEL, STEERING, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 3
CHECK THE (C92) HEATED STEERING WHEEL SIGNAL CIRCUIT FOR AN OPEN
1. Turn the ignition off.
2. Disconnect the Left Steering Wheel Switch harness connector.
3. Measure the resistance of the (C92) Heated Steering Wheel Signal circuit between the HSW harness connector and the Left Steering Wheel Switch connector.
  Is the resistance below 3.0 Ohms?
  
  Yes
  - Go To 4
  No
  - Repair the (C92) Heated Steering Wheel Signal circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK (C92) HEATED STEERING WHEEL SIGNAL CIRCUIT FOR A SHORT TO GROUND
1. Check for continuity between ground and the (C92) Heated Steering Wheel Signal circuit at the Left Steering Wheel Switch harness connector.
  Is there continuity between ground and the (C92) Heated Steering Wheel Signal circuit?
  
  Yes
  - Repair the (C92) Heated Steering Wheel Signal circuit for a short to ground.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 5
CHECK THE (C92) HEATED STEERING WHEEL SIGNAL CIRCUIT FOR A SHORT TO ANOTHER CIRCUIT
1. Check for continuity between the (C92) Heated Steering Wheel Signal circuit and all other circuits at the Left Steering Wheel Switch harness connector.
  Is there continuity between the (C92) Heated Steering Wheel Signal circuit and any other circuit?
  
  Yes
  - Repair the (C92) Heated Steering Wheel Signal circuit for a short to another circuit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 6
CHECK (Z92) GROUND CIRCUIT FOR AN OPEN
1. Measure the resistance of the (Z92) Ground circuit between the HSW harness connector and the Left Steering Wheel Switch connector.
  Is the resistance below 3.0 Ohms?
  
  Yes
  - Go To 7
  No
  - Repair the (Z92) Ground circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK FOR AN OPEN OR SHORTED LEFT STEERING WHEEL SWITCH
1. Replace the Left Steering Wheel Switch in accordance with the Service Information.
2. Reconnect the HSW harness connector.
3. Turn the ignition on.
4. With the scan tool, erase HSM DTCs.
5. Turn the ignition off.
6. Start the engine.
7. Turn the Heated Steering Wheel (HSW) on.
8. With the scan tool, read HSM DTCs.
  Does the DTC return?
  
  Yes
  - Go To 8
  No
  - Test complete.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK RELATED HARNESS CONNECTIONS
1. Disconnect all HSM harness connectors.
2. Disconnect all related in-line harness connections (if equipped).
3. Disconnect the related component harness connectors.
4. Inspect harness connectors, component connectors, and all male and female terminals for the following conditions:
  - Proper connector installation.
  - Damaged connector locks.
  - Corrosion.
  - Other signs of water intrusion.
  - Weather seal damage (if equipped).
  - Bent terminals.
  - Overheating due to a poor connection (terminal may be discolored due to excessive current draw).
  - Terminals that have been pushed back into the connector cavity.
  - Check for spread terminals and verify proper terminal tension.
  Repair any conditions that are found.
5. Connect all HSM harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
6. Connect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
7. Connect all related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
8. With the scan tool, erase DTCs.
9. Test drive or operate the vehicle in accordance with the when monitored and set conditions.
10. With the scan tool, read HSM DTCs.
  Is the same DTC active?
  
  Yes
  - Replace the Steering Column Control Module (SCCM) in accordance with the Service Information. Refer to MODULE, STEERING COLUMN CONTROL (SCCM), REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Repairing the wiring harness or connections corrected the problem.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .