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.
7
INSPECT STEERING ANGLE SENSOR
• Reconnect all disconnected connectors.
• Inspect the steering angle sensor.
• Is the steering angle sensor normal?
Yes
Go to the next step.
No
Replace the steering angle sensor, then go to the next step.
8
VERIFY THAT THE SAME DTC IS NOT PRESENT
• Clear the DTCs from the memory.
• 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.
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.