For 1990-2009 cars

### Circuit Description

The steering wheel position sensor supplies 2 analog inputs, Phase A and Phase B, to the electronic brake control module (EBCM). The 2 input signals are approximately 90 degrees out of phase. By interpreting the relationship between the 2 inputs, the EBCM can determine the position of the steering wheel and the direction of the steering wheel rotation.

### DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC C0710 Steering Position Signal

This vehicle has DTCs which include DTC Symptoms. For more information on DTC Symptoms, refer to DTC Symptom Description .

DTC Symptom | DTC Symptom Descriptor
--- | ---
00 | No Additional Information
1A | Bias Level Out Of Range
1F | Intermittent
52 | Compare Failure

### Conditions for Running the DTC

#### C0710 00

• | The ignition switch is turned ON.

• | Ignition voltage is greater than 8 volts.

• | The steering wheel position sensor power is connected for 0.2 second.

#### C0710 1A

• | The ignition switch is turned ON.

• | The ignition voltage is greater than 8 volts.

• | The steering wheel position sensor is centered.

#### C0710 1F

• | The ignition switch is turned ON.

• | The ignition voltage is greater than 8 volts.

• | The steering wheel position sensor has been powered ON for 0.2 second.

• | The steering speed of phase A is lower than 80 degrees/second.

#### C0710 52

• | The ignition switch is turned ON.

• | Ignition voltage is greater than 8 volts.

• | The steering wheel position sensor power is connected for 0.2 second.

• | The steering wheel position sensor is centered.

### Conditions for Setting the DTC

#### C0710 00

Both phase A and phase B are greater than 4.9 volts or less than 0.2 volt for 1.6 seconds.

#### C0710 1A

The direction deflection is greater than 40 degrees.

#### C0710 1F

The difference in the phase angle between phase A and phase B is greater than 106 degrees or lower than 84 degrees continuously for 0.25 second.

#### C0710 52

The changes in phase A or phase B is greater than 36 degrees between consecutive scans of the signal.

### Action Taken When the DTC Sets

• | The EBCM disables the vehicle stability enhancement system (VSES) for the duration of the ignition cycle.

• | The driver information center (DIC) displays the service stability system message.

• | The ABS remains functional.

### Conditions for Clearing the DTC

• | The condition for the DTC is no longer present and the DTC is cleared with a scan tool.

• | The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

### Diagnostic Aids

• | Check the vehicle for proper alignment. The car should not pull in either direction while driving straight on a level surface.

• | The Snapshot function on the scan tool can help find an intermittent DTC.

• | Possible causes for this DTC are the following conditions:

- | One of the steering wheel position sensor inputs are open, shorted to ground, or shorted to battery.

- | Internal steering wheel position sensor malfunction.

- | Noise on the steering wheel position sensor signal lines.

- | Yaw rate/lateral accelerometer sensor malfunction causing drifting signal outputs.

- | Internal EBCM malfunction.

### Test Description

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

1. Perform the Steering Position Sensor Test in order to verify if the steering wheel position sensor (SWPS) is operating properly.

2. Tests for the proper operation of the steering wheel position signal A circuit in the low voltage range.

3. Tests for the proper operation of the steering wheel position signal B circuit in the low voltage range.

4. Tests for the proper operation of the steering wheel position signal A circuit in the high voltage range. If the fuse in the jumper opens when you perform this test, the signal circuit is shorted to ground.

5. Tests for the proper operation of the steering wheel position signal B circuit in the high voltage range. If the fuse in the jumper opens when you perform this test, the signal circuit is shorted to ground.

6. Tests for a short to voltage in the 5 volt reference circuit.

7. Tests for a high resistance or an open in the low reference circuit.

Step | Action | Values | Yes | No
--- | --- | --- | --- | ---
Schematic Reference: Antilock Brake System Schematics Connector End View Reference: Antilock Brake System Connector End Views
1 | Did you perform the Diagnostic System Check - Vehicle? | -- | Go to Step 2 | Go to Diagnostic System Check - Vehicle
2 |

1. Install a scan tool.
2. Turn ON the ignition, with the engine off.
3. With the scan tool, perform the Steering Position Sensor Test.

Did DTC C0710 reset?

--

Go to Diagnostic Aids

Go to Step 3

3 |

1. Turn OFF the ignition.
2. Disconnect the SWPS connector.
3. Turn ON the ignition, with the engine OFF.
4. With the scan tool, observe the dual analog SWPS Signal A parameter in the VSES data list.

Does the scan tool indicate the dual analog SWPS Signal A parameter is less than the specified value?

0.2V

Go to Step 4

Go to Step 13

4 | With the scan tool, observe the SWPS Signal B parameter. Does the scan tool indicate the dual analog SWPS Signal B parameter is less than the specified value? | 0.2V | Go to Step 5 | Go to Step 3
5 |

1. Turn OFF the ignition.
2. Connect a 3-amp fused jumper wire between the 5-volt reference circuit of the SWPS and the signal A circuit of the SWPS.
3. Turn ON the ignition, with the engine OFF.
4. With the scan tool, observe the SWPS Signal A parameter.

Does the scan tool indicate the dual analog SWPS Signal A parameter is greater than the specified value?

4.9V

Go to Step 6

Go to Step 10

6 |

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 of the SWPS and the signal B circuit of the SWPS.
4. Turn ON the ignition, with the engine OFF.
5. With the scan tool, observe the SWPS Signal B parameter.

Does the scan tool indicate that the dual analog SWPS Signal B parameter is greater than the specified value?

4.9V

Go to Step 7

Go to Step 10

7 |

1. Disconnect the fused jumper.
2. Measure the voltage between the 5-volt reference circuit of the SWPS and the low reference circuit of the SWPS.

Does the voltage measure less the specified value?

5V

Go to Step 8

Go to Step 9

8 | Measure the resistance from the low reference circuit of the SWPS to a good ground. Does the resistance measure less than the specified value? | 5 Ω | Go to Step 16 | Go to Step 15
9 | Test the 5-volt reference circuit of the SWPS for a short to voltage. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 20 | Go to Step 17
10 | Test the 5-volt reference circuit of the SWPS for the following conditions:

• | Open

• | Short to Ground

• | High Resistance

Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

--

Go to Step 20

Go to Step 11

11 | Test the signal A circuit of the SWPS for the following conditions:

• | Open

• | Short to Ground

• | High Resistance

Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

--

Go to Step 20

Go to Step 12

12 | Test the signal B circuit of the SWPS for the following conditions:

• | Open

• | Short to Ground

• | High Resistance

Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

--

Go to Step 20

Go to Step 17

13 | Test the signal A circuit of the SWPS for a short to voltage. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 20 | Go to Step 17
14 | Test the signal B circuit of the SWPS for a short to voltage. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 20 | Go to Step 17
15 | Test the low reference circuit of the SWPS for a high resistance or an open. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 20 | Go to Step 17
16 | Inspect for poor connections at the harness connector of the SWPS. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | -- | Go to Step 20 | Go to Step 18
17 | Inspect for poor connections at the harness connector of the electronic brake control module (EBCM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | -- | Go to Step 20 | Go to Step 19
18 | Replace the SWPS. Refer to Steering Wheel Position Sensor or Steering Shaft Lower Bearing Replacement . Did you complete the replacement? | -- | Go to Step 20 | --
19 | Replace the EBCM. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | -- | Go to Step 20 | --
20 |

1. Use the scan tool in order to clear the DTCs using .
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