• Perform the Diagnostic System Check prior to using this diagnostic procedure:Diagnostic System Check - Vehicle
• Review the description of Strategy Based Diagnosis:Strategy Based Diagnosis
• An overview of each diagnostic category can be found here:Diagnostic Procedure Instructions

For an overview of the component/system, refer to:Drive Mode Description and Operation

Ignition » On / Vehicle » In Service Mode

Signal circuit—Voltage=Out Of Range

DTCs listed in the DTC Descriptor category=Type B

DTCs listed in the DTC Descriptor category=Type B

Steering Wheel Secondary/Configurable Control Schematics

Master Electrical Component List

• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Control Module References

1. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

   Verify the DTC does not set.

• If the DTC sets

  Refer to: Circuit/System Testing

• If the DTC is not set
2. All OK.

1. Ignition/Vehicle and all vehicle systems OFF.
2. Disconnect the harness connector at the S126 Drive Mode Select Switch.
3. Test for less than 10 Ω between the ground circuit terminal 10 and ground.
• If 10 Ω or greater
1. Ignition/vehicle OFF.
2. Test for less than 2 Ω in the ground circuit end to end.
• If 2 Ω or greater, repair the open/high resistance in the circuit.
• If less than 2 Ω, repair the open/high resistance in the ground connection.
• If less than 10 Ω
4. Ignition ON/Vehicle in service mode, test for 4.8V — 5.2V between the 5V reference circuit terminal 9 and ground.
• If less than 4.8 V
1. Test circuit 4109 for a short to ground.
• If a short to ground is found, repair the fault on the circuit.
• If a short to ground is not found.
2. Test circuit 4109 for an open/high resistance.
• If an open/high resistance is found, repair the fault on the circuit.
• If an open/high resistance is not found.
3. Replace the K20 Engine Control Module.
• If greater than 5.2 V
1. Test circuit 4109 for a short to voltage.
• If a short to voltage is found, repair the fault on the circuit.
• If a short to voltage is not found.
2. Replace the K20 Engine Control Module.
• If between 4.8 V – 5.2 V
5. Ignition/vehicle OFF, disconnect the appropriate connector for circuit 4108 at the K20 Engine Control Module.
6. Test the signal circuit 4108 for an open/high resistance.
• If an open/high resistance is found, repair the fault on the circuit.
• If an open/high resistance is not found.
7. Test the signal circuit 4108 for a short to ground.
• If a short to ground is found, repair the fault on the circuit.
• If a short to ground is not found.
8. Test the signal circuit 4108 for a short to B+.
• If a short to B+ is found, repair the fault on the circuit.
• If a short to B+ is not found.
9. Replace the S126 Drive Mode Select Switch.
10. Operate the vehicle with the Conditions for Running the DTC. Verify the DTC does not set.
• If the DTC sets

  Replace the K20 Engine Control Module.

• If the DTC is not set
11. All OK.

Perform the Diagnostic Repair Verification after completing the repair:Diagnostic Repair Verification

For control module replacement, programming, and setup refer to:Control Module References