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Code No. C1505 Steering angle sensor
 
 
caution
  • If there is any problem in the CAN bus lines, an incorrect diagnostic trouble code may be stored. Prior to this diagnosis, diagnose the CAN bus lines (Refer to GROUP 54C - CAN Bus Diagnostics Table ).
  • Whenever ECU is replaced, ensure that the CAN bus lines are normal.
  • When the steering wheel sensor is replaced, always carry out calibration to make ASC-ECU learn the neutral point (Refer to ).
  • When the hydraulic unit (integrated with ASC-ECU) is replaced, always carry out the calibration of the steering wheel sensor and the G and yaw rate sensor (Refer to and ).
 
 
OPERATION
The steering wheel sensor output signal is sent to ASC-ECU via the CAN bus lines.
 
 
DIAGNOSTIC TROUBLE CODE SET CONDITIONS
ASC-ECU monitors the signal from the steering wheel sensor, when an abnormal signal is output from the steering wheel sensor, the ECU determines that the trouble occurs and stores the diagnostic trouble code.
 
 
PROBABLE CAUSES
  • The CAN bus line is defective.
  • Steering wheel sensor improper installation
  • Steering wheel sensor calibration error
  • Malfunction of the steering wheel sensor
  • Malfunction of ASC-ECU
 
 
DIAGNOSIS
STEP 1. Using scan tool MB991958, diagnose the CAN bus lines.
Use the scan tool MB991958 to diagnose the CAN bus lines.
Is the check result normal?
Go to Step 3.
Repair the CAN bus line. (Refer to GROUP 54C - CAN Bus Trouble Symptom Chart .) On completion, go to Step 2.
 
STEP 2. Diagnostic trouble code recheck after resetting CAN bus lines
Is diagnostic trouble code No. C1505 stored?
Go to Step 3.
This diagnosis is complete.
 
STEP 3. Steering wheel sensor installation state check
Check that the steering wheel sensor is installed correctly.
Is the check result normal?
Go to Step 4.
Install the steering wheel sensor correctly. (Refer to .)
 
STEP 4. Using scan tool MB991958, check data list
With the front wheel facing in the straight-ahead direction, check the steering wheel sensor signal using the data list. Check that the data list deviates within ±5° from the neutral position (Refer to ).
  • Item No.11: Steering angle sensor
Is the check result normal?
Go to Step 5.
Calibrate the steering wheel sensor (Refer to ).
 
STEP 5. Using scan tool MB991958, check data list
Turn the steering wheel fully to the left, and then turn it fully to the right. Then check that the value of the steering wheel sensor changes smoothly using the data list. In addition, check that the steering wheel angle on the data list almost matches the actual steering wheel angle (Refer to ).
  • Item No.11: Steering angle sensor
Is the check result normal?
Go to Step 6.
After the steering wheel sensor is replaced (Refer to ), calibrate the steering wheel sensor.(Refer to .)
 
STEP 6. Check whether the diagnostic trouble code is stored again.
Check again if the diagnostic trouble code is stored.
(1) Erase the stored diagnostic trouble code.
(2) Ignition switch: "LOCK" (OFF)
(3) Ignition switch: "ON"
Is diagnostic trouble code No.C1505 stored?
Replace the hydraulic unit (integrated with ASC-ECU). (Refer to .)
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).