How To Proceed With Troubleshooting
NOTE:
- DTCs for the CAN communication system are as follows:
U0073, U0100, U0101, U0122, U0123, U0124, U0126, U0132, U0145, U1101.
- Refer to troubleshooting of each system if DTCs regarding the CAN communication system are not output.
- CHECK AND CLEAR DTCs
- CHECK FOR INSTALLED SYSTEMS (ECUS & SENSORS) THAT ADOPT CAN COMMUNICATION)
- Check which of the following is adopted: LEXUS Navigation System, dynamic radar/laser cruise control, and electronic modulated air suspension (see DIAGNOSIS SYSTEM ).
- (SEE CHECK CAN BUS LINE )
- CHECK HAND-HELD TESTER VIA CAN VIM
- Select "BUS CHECK" (see DIAGNOSIS SYSTEM
).
Standard: All ECUs and sensors connected to the CAN communication system are displayed.
NOTE:- The systems (ECUs, sensors) that adopt CAN communication vary depending on the vehicle and option settings. Check which systems (ECUs, sensors) are installed on the vehicle (see DIAGNOSIS SYSTEM ).
- Non-installed ECUs or sensors are not displayed. Do not mistake them for being in the communication stop mode.
NO: COMMUNICATION STOP MODE TABLE (SEE PROBLEM SYMPTOMS TABLE )
YES: GO TO NEXT STEP
- Select "BUS CHECK" (see DIAGNOSIS SYSTEM
).
- DTC COMBINATION TABLE (SEE DIAGNOSTIC TROUBLE CODE CHART
)
- 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
END