DTC C1277, C1295, C1306, C1307 [DSC]

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DTC C1277, C1295, C1306, C1307 [DSC]

B3E040243000W21

DTC | C1277, C1295, C1306, C1307 | Steering angle sensor

DETECTION CONDITION

• C 1277

  - The steering angle sensor detects signal modulation or steering angle that exceeds specification.

• C 1295

  - Output voltage from either steering angle sensors 1 or 2 is 4.75 V or more or 0.25 V or less.

• C 1306

  - The neutral position of the steering angle cannot be estimated from the signals from the ABS wheel-speed sensors and the combined sensor.

• C 1307

  - The signal from the steering angle sensor remains unchanged when the steering angle is turned to the right and left.

POSSIBLE CAUSE

• Improper installation or positioning of the steering angle sensor
• Open circuit in the wiring harness between DSC HU/CM terminal AB and steering angle sensor terminal A
• Open circuit in the wiring harness between DSC HU/CM terminal AE and steering angle sensor terminal C, short to battery or to ground
• Open circuit in the wiring harness between DSC HU/CM terminal AN and steering angle sensor terminal B, short to battery or to ground
• Open circuit in the wiring harness between DSC HU/CM terminal AH and steering angle sensor terminal D
• Signal error from the ABS wheel-speed sensor
• Signal error from the combined sensor
• Signal errors from sensors due to rough road driving
• Steering angle sensor malfunction
• Poor connection at connectors (female terminal)

Diagnostic procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | INSPECT STEERING ANGLE SENSOR POWER SUPPLY FOR OPEN CIRCUIT • Turn the ignition switch to the ON position. • Measure the voltage between the steering angle sensor terminal A and body ground. • Is the voltage B+? | Yes | Go to the next step.
No | Repair or replace the wiring harness, then go to Step 8.
2 | INSPECT STEERING ANGLE SENSOR GROUND FOR OPEN CIRCUIT • Turn the ignition switch off. • Inspect for continuity between the steering angle sensor terminal D and body ground. • Is there continuity? | Yes | Go to the next step.
No | Repair or replace the wiring harness, then go to Step 8.

3

INSPECT STEERING ANGLE SENSOR SIGNAL FOR OPEN CIRCUIT
• Disconnect the DSC HU/CM connectors.
• Inspect for continuity between the DSC HU/CM connectors (vehicle harness-side) and the following steering angle sensor connector terminals:

  - Steering angle sensor (Sensor 1 system): AN-B
  - Steering angle sensor (Sensor 2 system): AE-C

• Is there continuity?

Yes

Go to the next step.

No | Repair or replace the wiring harness, then go to Step 8.

4

INSPECT STEERING ANGLE SENSOR SIGNAL FOR SHORT TO GROUND
• Disconnect the steering angle sensor connectors
• Inspect for continuity between the following steering angle sensor connector terminals (vehicle harness-side) and body ground:

  - Steering angle sensor (Sensor 1 system): B-Body ground
  - Steering angle sensor (Sensor 2 system): C-Body ground

• Is there continuity?

Yes

Repair or replace the wiring harness, then go to Step 8.

No | Go to the next step.

5

INSPECT STEERING ANGLE SENSOR SIGNAL FOR SHORT TO POWER SUPPLY CIRCUIT
• Measure voltage between the following steering angle sensor connector terminals (vehicle harness-side) and body ground:

  - Steering angle sensor (Sensor 1 system): B-Body ground
  - Steering angle sensor (Sensor 2 system): C-Body ground

• Is the voltage 1 V or less?

Yes

Go to the next step.

No | Repair or replace the wiring harness, then go to Step 8.
6 | INSPECT FOR IMPROPER INSTALLATION OF STEERING ANGLE SENSOR • Is the installation normal? | Yes | Go to the next step.
No | Repair installation or replace the steering angle sensor, then go to Step 8. (See STEERING ANGLE SENSOR REMOVAL/INSTALLATION.)
7 | INSPECT STEERING ANGLE SENSOR • Reconnect all disconnected connectors. • Inspect the steering angle sensor. (See STEERING ANGLE SENSOR INSPECTION.) • Is the steering angle sensor normal? | Yes | Go to the next step.
No | Replace the steering angle sensor, then go to the next step. (See STEERING ANGLE SENSOR REMOVAL/INSTALLATION.)
8 | VERIFY THAT THE SAME DTC IS NOT PRESENT • Clear the DTCs from the memory. (See Clearing DTCs Procedures.) • Start the engine and drive the vehicle at 10 km/h {6.2 mph} or more. • Are the same DTCs present? | Yes | Repeat the inspection from Step 1. If the malfunction recurs, replace the DSC HU/CM, then go to the next step. (See DSC HU/CM REMOVAL/INSTALLATION.)
No | Go to the next step.
9 | VERIFY THAT NO OTHER DTCS ARE PRESENT • Are any other DTCs output? | Yes | Go to the applicable DTC inspection. (See DTC Table.)
No | DTC troubleshooting completed.