U0124

BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: U0073/94: 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 inputs the signals from the ECM, steering sensor, and yaw rate sensor via CAN communication system.





INSPECTION PROCEDURE

PROCEDURE

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

DATA LIST: ABS / VSC / TRAC





OK:
There are no momentary interruptions.
HINT:
Perform the above inspection before removing the sensor and connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

2. RECONFIRM DTC
(a) Record the output DTCs (for ABS, VSC, and CAN communication).

HINT: If the CAN communication system DTC and the relevant sensor DTCs are output simultaneously, troubleshoot the relevant sensor DTCs (for ABS and VSC) after the CAN communication system returns to normal.

NEXT -- REPAIR CAN COMMUNICATION SYSTEM
3. REPAIR OR REPLACE HARNESS OR CONNECTOR
(a) Repair or replace the harness and connector.
(b) Check for any momentary interruption between the skid control ECU and each sensor or ECM Check for Intermittent Problems.
(c) Check that there is no momentary interruption.
NEXT -- Continue to next step.

4. RECONFIRM DTC
(a) Clear the DTC.
(b) Start the engine.
(c) Drive the vehicle and turn the steering wheel to the right and left at a speed of 9 mph (15 km/h) or more.
(d) Check that no CAN communication system DTC is output.
(e) If ABS and VSC DTCs are output, record them.
Result:





HINT:
- The CAN communication system must be normal when repairing each sensor DTC (for ABS and VSC).
- These DTCs may be restored due to a malfunction in the connector terminal connection, etc.

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