DTC 62

BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: U0073/94,U0100/65,U0123/62,U0124/95,U0126/63: Control Module Communication Bus OFF

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

DESCRIPTION

The skid control ECU receives signals from the ECM, steering angle sensor, and yaw rate and acceleration sensor via the CAN communication system.






WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (MOMENTARY INTERRUPTION)
(a) Using the Techstream, check for any momentary interruptions in the wire harness and connector corresponding to a DTC Check for Intermittent Problems.

ABS/VSC/TRAC





Result:





HINT: Perform the above inspection before removing the sensor and connector.

C -- REPAIR OR REPLACE HARNESS OR CONNECTOR
B -- RECONFIRM DTC
A -- Continue to next step.
2. CHECK IF EACH SENSOR AND ECM CONNECTOR IS SECURELY CONNECTED
(a) Turn the ignition switch off.
(b) Check if each sensor or ECM connector is securely connected.
OK:
Each connector is securely connected.
NG -- CONNECT CONNECTOR TO EACH SENSOR OR ECM CORRECTLY
OK -- Continue to next step.
3. RECONFIRM DTC
(a) Turn the ignition switch off.
(b) Record the output DTCs (for ABS, VSC system, and/or CAN communication system) Vehicle Stability Control System for ABS and VSC system, or Diagnosis System for CAN communication system).
HINT: If CAN communication system DTCs and the relevant sensor DTCs are output simultaneously, troubleshoot the relevant sensor DTCs (for ABS and/or VSC system) after the CAN communication system returns to normal.

Result:






C -- CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION)
B -- REPAIR CIRCUIT INDICATED BY OUTPUT DTC
A -- INSPECT CAN COMMUNICATION SYSTEM
4. REPAIR OR REPLACE HARNESS OR CONNECTOR
(a) Turn the ignition switch off.
(b) Repair or replace the harness or connector.
(c) Check for any momentary interruptions between the skid control ECU and each sensor or ECM Check for Intermittent Problems.
(d) Check that there are no momentary interruptions.
NEXT -- Continue to next step.
5. RECONFIRM DTC
(a) Turn the ignition switch off.
(b) Clear the DTCs Vehicle Stability Control System.
(c) Start the engine.
(d) Drive the vehicle and turn the steering wheel to the right and left at a speed of 15 km/h (9 mph) or more.
(e) Check that no CAN communication system DTCs are output Diagnosis System.
(f) If ABS and VSC DTCs are output, record them Vehicle Stability Control System.
Result:





HINT: The CAN communication system must be normal when performing troubleshooting for each sensor DTC (for ABS and VSC).

C -- END
B -- REPAIR CIRCUIT INDICATED BY OUTPUT DTC
A -- INSPECT CAN COMMUNICATION SYSTEM