Dtc U0073/49 Control Module Communication Bus Off

Steering. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35
Power Steering. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35

DESCRIPTION

INSPECTION PROCEDURE

RECONFIRM DTC

DTC U0073/49 Control Module Communication Bus Off

DTC U0100/41 Lost Communication with ECM/PCM "A"

DTC U0129/42 Lost Communication with Brake System Control Module


DESCRIPTION

The power steering ECU receives signals from the ECM and the skid control ECU via the CAN communication system.

DTC No.
DTC Detection Condition
Trouble Area
U0073/49
Control Module Communication Bus Off
CAN communication system
U0100/41
Lost Communication with ECM/PCM "A"
  1. CAN communication system
  2. ECM
U0129/42
Lost Communication with Brake System Control Module
  1. CAN communication system
  2. Skid control ECU
HINT:
  1. When 2 or more DTCs starting with [U] are output simultaneously, inspect the connectors and wire harness of each ECU.
  2. If DTC U0100/41 is output, first erase the DTCs. Then turn the ignition switch from off to on (IG). If DTC U0100/41 is not output again, there is no malfunction.

INSPECTION PROCEDURE

1.RECONFIRM DTC

  1. Check for DTC.

    OK:
    DTC is not output.


OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
NG

GO TO CAN COMMUNICATION SYSTEM