Inspection Procedure

HINT:

• When DTC U0073/94, U0100/65, U0123/62, U0124/95, U0126/63, U0128/13, U0130/68 and/or U0131/67 is output together with DTC C1439/66 and/or C1445/66, inspect and repair the trouble areas indicated by DTC U0073/94, U0100/65, U0123/62, U0124/95, U0126/63, U0128/13, U0130/68 and/or U0131/67 first (see DTC U0073/94 CONTROL MODULE COMMUNICATION BUS OFF; DTC U0100/65 LOST COMMUNICATION WITH ECM/PCM; DTC U0123/62 LOST COMMUNICATION WITH YAW RATE SENSOR MODULE; DTC U0124/95 LOST COMMUNICATION WITH LATERAL ACCELERATION SENSOR MODULE; DTC U0126/63 LOST COMMUNICATION WITH STEERING ANGLE SENSOR MODULE; DTC U0128/13 LOST COMMUNICATION WITH PARK BRAKE CONTROL MODULE; DTC U0130/68 LOST COMMUNICATION WITH STEERING EFFORT CONTROL MODULE; DTC U0131/67 LOST COMMUNICATION WITH POWER STEERING CONTROL MODULE  ).
• When the speed sensor or the yaw rate and acceleration sensor has trouble, DTCs for the steering angle sensor may be output even when the steering angle sensor is normal. When DTCs for the speed sensor or yaw rate and acceleration sensor are output together with other DTCs for the steering angle sensor, inspect and repair the speed sensor and yaw rate and acceleration sensor first, and then inspect and repair the steering angle sensor.

1. CHECK FOR DTC 
   1. Clear the DTCs (see DTC CHECK/CLEAR  ).
   2. Turn the engine switch off.
   3. Turn the engine switch on (IG) and check that no CAN communication system DTCs are output (see DTC CHECK/CLEAR  ).
   4. Drive the vehicle at a speed of 35 km/h (22 mph) and turn the steering wheel to the right and left and check that no speed sensor and yaw rate and deceleration sensor DTCs are output (see DTC CHECK/CLEAR  ).

      Result 

      RESULT CHART
      
      

      Result	Proceed to
      DTCs C1439/66 and/or C1445/66 are output	A
      CAN communication system DTC is output	B
      Speed sensor and/or yaw rate and acceleration sensor DTC is output	C
      DTCs C1439/66 and C1445/66 are not output	D

      HINT:

      • If there is a malfunction in the speed sensor or the yaw rate and acceleration sensor, an abnormal value may be output although the steering angle sensor is normal.
      • If the speed sensor and the yaw rate and acceleration sensor DTCs are output simultaneously, repair the sensors and inspect the steering angle sensor.
      • If the same DTC C1439/66 and/or C1445/66 is not output again, the DTC may have been stored due to a temporary loss of the steering angle zero calibration, such as when the power voltage drops.

        B: INSPECT CAN COMMUNICATION SYSTEM  (See HOW TO PROCEED WITH TROUBLESHOOTING )

        C: REPAIR CIRCUITS INDICATED BY OUTPUT DTCS (See  DIAGNOSTIC TROUBLE CODE CHART   ) 

        D: CHECK FOR INTERMITTENT PROBLEMS  (See HOW TO PROCEED WITH TROUBLESHOOTING )

        A: Go to Next Step 

2. CHECK STEERING ANGLE SENSOR ZERO POINT CALIBRATION 
   1. Drive the vehicle straight ahead at 35 km/h (22 mph) or more for at least 5 seconds.
   2. Check that the centered position of the steering wheel is correctly set while driving straight ahead.

      HINT:

      If the front wheel alignment and steering position are adjusted as a result of an off-centered position of the steering wheel, acquire yaw rate and acceleration sensor zero point again after the adjustments are completed.

      OK: The centered position of the steering wheel is correctly set. 

      NG: ADJUST FRONT WHEEL ALIGNMENT OR STEERING POSITION 

      OK: Go to Next Step 

3. RECONFIRM DTC 
   1. Turn the engine switch off.
   2. Clear the DTCs (see DTC CHECK/CLEAR  ).
   3. Start the engine.
   4. Drive the vehicle at a speed of 35 km/h (22 mph) or more and turn the steering wheel to the right and left.
   5. Check if the same DTC is output (see DTC CHECK/CLEAR  ).

      Result 

      RESULT CHART
      
      

      Result	Proceed to
      DTCs C1439/66 and/or C1445/66 are output	A
      DTCs C1439/66 and C1445/66 are not output	B

      HINT:

      If the same DTC C1439/66 and/or C1445/66 is not output again, the DTC may have been stored due to a temporary loss of the steering angle zero calibration, such as when the power voltage drops.

      B: END 

      A: REPLACE SKID CONTROL ECU (See  REMOVAL   )