U0401

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS


U0401 ECM CAN CIR1

1.PERFORM ICC SENSOR INTEGRATED UNIT SELF-DIAGNOSIS
1. Perform self-diagnosis.
2. Check if "U1000: CAN COMM CIRCUIT" (DTC 100) other than "U0401: ECM CAN CIR1" (DTC 120) is indicated in self-diagnosis item in the display.
Is it indicated?
YES - 1. CAN communication inspection. Refer to ICC.
2. After repairing or replacing applicable item, erase DTC and perform ICC system running test.
Then perform self-diagnosis of ICC system again.
NO - GO TO 2.
2.PERFORM ECM SELF-DIAGNOSIS
With CONSULT-III
1. Perform "ENGINE" self-diagnosis. Refer to Testing and Inspection (for VQ35HR) or (for VK45DE).
2. Check if malfunction is indicated.
Is malfunction indicated?
YES - 1. Repair or replace applicable item.
2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system again.
NO - 1. Replace ICC sensor integrated unit, and adjust laser beam aiming.
2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system again.