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Test Description

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The numbers below refer to the step numbers on the diagnostic table.

  1. 2:  Tests if the sensor is within the valid voltage range.
  2. 3:  Tests if the sensor is internally shorted to ground.
  3. 4:  Tests if the signal circuit is shorted to ground
  4. 5:  Tests if the 5 volt reference circuit is short to voltage or open.
  5. 14:  Program the BCM after replacement.
DTC C0472 or C0473

Step Action Value(s) Yes No
Schematic Reference: Steering Controls Schematics 
1 Did you perform the Variable Effort Steering Diagnostic System Check? - Go to Step 2  Go to Diagnostic System Check - Variable Effort Steering 
2 
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With a scan tool, observe the steering wheel position sensor data parameter in the Electronic Variable Orifice data list.
Does the scan tool display the steering wheel position sensor data parameter is within the specified range?		 0.35-4.7 V Go to TESTING FOR INTERMITTENT AND POOR CONNECTIONS in Wiring Systems Go to Step 3 
3 
  1. Turn OFF the ignition.
  2. Disconnect the steering wheel position sensor harness connector.
  3. Turn ON the ignition, with the engine OFF.
  4. With a scan tool, observe the steering wheel position sensor data parameter.
Does the scan tool indicate that the steering wheel position sensor data parameter is greater than specified value?		 0.0 V Go to Step 4  Go to Step 8 
4 
  1. Turn OFF the ignition.
  2. Connect a 3 amp fused jumper wire between the signal circuit and the low reference circuit of the steering wheel position sensor harness connector.
  3. Turn ON the ignition, with the engine OFF.
  4. With a scan tool, observe the steering wheel position sensor data parameter.
Does the scan tool indicate that the steering wheel position sensor data parameter is less than specified value?		 0.35 V Go to Step 5  Go to Step 9 
5 
  1. Turn OFF the ignition.
  2. Disconnect the fused jumper wire.
  3. Connect a 3 amp fused jumper wire between the 5 volt reference circuit and the signal circuit of the steering wheel position sensor harness connector.
  4. Turn ON the ignition, with the Engine OFF.
  5. With a scan tool, observe the steering wheel position sensor data parameter.
Does the scan tool indicate that the steering wheel position sensor data parameter is greater than the specified value?		 4.7 V Go to Step 7  Go to Step 6 
6 Test the 5 volt reference circuit of the steering wheel position sensor for a short to ground. Refer to TESTING FOR SHORT TO GROUND and WIRING REPAIRS in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 15  Go to Step 12 
7 Test the 5 volt reference circuit of the steering wheel position sensor for a short to voltage or an open. Refer to CIRCUIT TESTING and WIRING REPAIRS in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 15  Go to Step 11 
8 Test the signal circuit of the steering wheel position sensor for a short to ground. Refer to TESTING FOR SHORT TO GROUND and WIRING REPAIRS in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 15  Go to Step 12 
9 Test the signal circuit of the steering wheel position sensor for a short to voltage or an open. Refer to CIRCUIT TESTING and WIRING REPAIRS in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 15  Go to Step 10 
10 Test the low reference circuit of the steering wheel position sensor for a short to voltage or an open. Refer to CIRCUIT TESTING and WIRING REPAIRS in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 15  Go to Step 12 
11 Inspect for poor connections at the steering wheel position sensor harness connector. Refer to TESTING FOR INTERMITTENT AND POOR CONNECTIONS and CONNECTOR REPAIRS in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 15  Go to Step 13 
12 Inspect for poor connections at the BCM harness connector. Refer to TESTING FOR INTERMITTENT AND POOR CONNECTIONS and CONNECTOR REPAIRS in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 15  Go to Step 14 
13 Replace the steering wheel position sensor. Refer to Steering Wheel Position Sensor or Steering Shaft Lower Bearing Replacement .
Did you complete the replacement?		 - Go to Step 15  -
14  Replace the BCM. Refer to BODY CONTROL MODULE REPLACEMENT in Body Control Systems.
Did you complete the replacement?		 - Go to Step 15  -
15
  1. Use the scan tool in order to clear the DTCs.
  2. Operate the vehicle within the conditions for running the DTC as specified in the supporting text.
Does the DTC reset?		 - Go to Step 2  System OK
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