How To Proceed With Troubleshooting

WARNING: This page is about a different car, the 2007 Lexus GX 470. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

DTCs for the CAN communication system as follows: U0073/94, U0123/62, U0124/95, U0126/63, U0100/65.
Refer to troubleshooting of each system if DTCs regarding the CAN communication system are not output.

CHECK AND CLEAR DTCs
CHECK CAN BUS LINE

CHECK USING INTELLIGENT TESTER VIA CAN VIM

Select the "BUS CHECK" (See CAN BUS LINE ).

Result

RESULT TABLE

Proceed to	Result
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

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

A: Go to next step

CHECK DTC COMBINATION 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 intelligent testers "BUS CHECK" screen via the CAN VIM.
CIRCUIT INSPECTION
IDENTIFICATION OF PROBLEM
REPAIR OR REPLACE
CONFIRMATION TEST
NEXT: END