How To Proceed With Troubleshooting

WARNING: This page is about a different car, the 2006 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

DTCs for the CAN communication system are as follows:
U0073/94, U0123/62, U0124/95, U0126/63, U100/65.
Refer to troubleshooting of each system if DTCs regarding the CAN communication system are not output.

CHECK AND CLEAR DTCs
CHECK CAN BUS LINE (SEE CHECK CAN BUS LINE )

CHECK USING HAND-HELD TESTER VIA CAN VIM

Select BUS CHECK .

Result:

RESULT REFERENCE

A	All ECUs and sensors connected to the CAN communication system are displayed.
B	An ECU or sensor not connected to the CAN communication system is displayed.
C	A few ECUs or sensors not connected to the CAN communication system are displayed.

B: COMMUNICATION STOP MODE TABLE (SEE PROBLEM SYMPTOMS TABLE )

C: CHECK FOR AN OPEN IN ONE SIDE OF THE CAN SUB BUS LINE (SEE CHECK FOR AN OPEN IN ONE SIDE OF CAN SUB BUS LINE )

A: Go to next step

DTC COMBINATION TABLE (SEE PROBLEM SYMPTOMS TABLE )
1. Confirm trouble according to the combination of output DTCs regarding the CAN communication system.
HINT:

Previous CAN communication system DTCs may be the cause if CAN communication system DTCs are output and all ECUs and sensors connected to the CAN communication system are displayed on the hand-held tester's "BUS CHECK" screen via the CAN VIM.
CIRCUIT INSPECTION
IDENTIFICATION OF PROBLEM
REPAIR OR REPLACE
CONFIRMATION TEST