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DTC C1394 INCOMP.learn neutral(SAS)
 
 
caution
  • Whenever the ECU is replaced, ensure that the CAN bus lines are normal.
  • When the steering wheel sensor is replaced, calibrate the steering wheel sensor (Refer to ).
 
 
OPERATION
FCM/LDW/AHB-ECU communicates with the steering wheel sensor via the CAN bus lines.
 
 
DTC SET CONDITION
This DTC is set when the abnormality below is detected:
  • The steering wheel sensor has not learned the neutral position yet.
 
 
TROUBLESHOOTING HINTS
  • Neutral position of steering wheel sensor not learned
  • Malfunction of the steering wheel sensor (column switch assembly)
  • Malfunction of the FCM/LDW/AHB-ECU
 
 
DIAGNOSIS
STEP 1. Steering wheel sensor calibration.
Perform calibration of steering wheel sensor (Refer to ).
Has the calibration succeeded?
Go to Step 2.
Replace the steering wheel sensor (column switch assembly) (Refer to GROUP 54A - Column Switch ).
 
STEP 2. Check whether the DTC is set again.
(1)
cautionTo prevent damage to scan tool (M.U.T.-IIISE), always turn off the power supply mode of the electric motor switch before connecting or disconnecting scan tool (M.U.T.-IIISE).
Connect scan tool (M.U.T.-IIISE). Refer to "How to connect the Scan Tool (M.U.T.-IIISE) ."
(2) Erase the DTC.
(3) Turn off the power supply mode of the electric motor switch.
(4) Turn on the power supply mode of the electric motor switch.
(5) Check if DTC is set.
Is the DTC set?
Replace the FCM/LDW/AHB-ECU (Refer to ).
This diagnosis is complete.