Dtc U0073 Control Module Communication Bus Off

Brake. Yaris. Ncp93, 131
Brake Control Dynamic Control Systems. Yaris. Ncp93, 131

DESCRIPTION

INSPECTION PROCEDURE

RECONFIRM DTC

DTC U0073 Control Module Communication Bus OFF


DESCRIPTION

The skid control ECU receives the signal sent from the ECM via the CAN communication system. When DTCs indicating a CAN communication system malfunction are output, repair the CAN communication system before repairing each corresponding sensor.

DTC NO.
DTC Detection Condition
Trouble Area
U0073
When either of the following is detected:
  1. With terminal IG1 10 V or more, data output from skid control ECU is completed, and output continues for 5 seconds or more.
  2. With terminal IG1 10 V or more, bus off condition occurs once or more within 0.1 seconds, and this state continues 10 times or more.
CAN communication system

INSPECTION PROCEDURE

1.RECONFIRM DTC

  1. Clear the DTC (YARIS_NCP93 RM000000XHV0BPX.html).

  1. Turn the ignition switch off.

  1. Start the engine.

  1. Drive the vehicle and turn the steering wheel to the right and left at a speed of 15 km/h (9 mph) or more.

  1. Check for DTCs (YARIS_NCP93 RM000000XHV0BPX.html).

    HINT:
    If the CAN communication system DTC and the relevant sensor DTCs are output simultaneously, troubleshoot the relevant sensor DTCs (for ABS) after the CAN communication system returns to normal.
    Result
    Result
    		Proceed to
    DTC (relating to CAN communication system) is output
    		A
    DTC (relating to ABS system) is output
    		B
    DTC is not output
    		C


B
REPAIR CIRCUIT INDICATED BY OUTPUT DTC (YARIS_NCP93 RM000000XHU08CX.html)

C
CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION) (YARIS_NCP93 RM000000UZ309WX.html)
A

CHECK CAN COMMUNICATION SYSTEM (YARIS_NCP93 RM000001D3500JX.html)