How To Proceed With Troubleshooting

WARNING: This page is about a different car, the 2008 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.

HINT

Perform troubleshooting according to the following flowchart.
* Use the Techstream

VEHICLE BROUGHT TO WORKSHOP
CHECK DTC AND FREEZE FRAME DATA*
1. Record DTCs and freeze frame data.
CLEAR DTC AND FREEZE FRAME DATA*

PROBLEM SYMPTOM CONFIRMATION

Result

RESULT CHART

Result	Proceed to
Problem symptoms does not occur.	A
Problem symptoms occurs.	B

B: Go to step 6

A: Go to next Step

SYMPTOM SIMULATION

CHECK DTC*

Recheck for DTCs (See DTC CHECK/CLEAR ).

Result

RESULT CHART

Result	Proceed to
Normal system code is output.	A
DTC is output.	B

HINT:

Refer to the diagnostic trouble code chart if any DTCs are output
If any CAN communication system DTCs are output, perform troubleshooting on the CAN communication system first (See HOW TO PROCEED WITH TROUBLESHOOTING )
If communication to the power steering ECU assembly is not established through the Techstream, inspect terminals CANH and CANL of the DLC3 and power steering ECU assembly, and inspect the IG circuit of the power steering ECU assembly.

B: Go to step 8

A: Go to next Step

PROBLEM SYMPTOMS TABLE
CIRCUIT INSPECTION
IDENTIFICATION OF PROBLEM*
REPAIR OR REPLACE
CONFIRMATION TEST
END