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.

The TCM of this system is connected to the CAN communication system Therefore, before starting troubleshooting, make sure to check that there is no trouble in the CAN and multiplex communication system.
*. Use the Techstream.

VEHICLE BROUGHT TO WORKSHOP
CUSTOMER PROBLEM ANALYSIS
INSPECT BATTERY VOLTAGE
Standard voltage:

11 to 14 V

If the voltage is below 11V, recharge or replace the battery before proceeding
CONNECT TECHSTREAM TO DLC3*
CHECK AND CLEAR DTCS AND FREEZE FRAME DATA*
1. Refer to DTC CHECK / CLEAR
VISUAL INSPECTION
SELECT CHECK MODE DIAGNOSIS*
1. Refer to CHECK MODE PROCEDURE

PROBLEM SYMPTOM CONFIRMATION

Refer to ROAD TEST .

Result

RESULT REFERENCE

Result	Proceed to
Symptom does not occur	A
Symptom occurs	B

B: GO TO STEP 10

A: Go to next Step

SYMPTOM SIMULATION
1. Refer to Symptom Simulation (See HOW TO PROCEED WITH TROUBLESHOOTING ).

DTC CHECK*

Refer to DTC CHECK / CLEAR

Result

RESULT REFERENCE

Result	Proceed to
DTC is not output	A
DTC is output	B

B: GO TO STEP 18

A: Go to next Step

BASIC INSPECTION
1. Refer to AUTOMATIC TRANSMISSION FLUID .
2. Refer to PARK/NEUTRAL POSITION SWITCH
3. Refer to FLOOR SHIFT ASSEMBLY .
NG: GO TO STEP 21

OK: Go to next Step
MECHANICAL SYSTEM TESTS
1. Refer to MECHANICAL SYSTEM TESTS .
NG: GO TO STEP 17

OK: Go to next Step
HYDRAULIC TEST
1. Refer to HYDRAULIC TEST
NG: GO TO STEP 17

OK: Go to next Step
MANUAL SHIFTING TEST
1. Refer to MANUAL SHIFTING TEST .
NG: GO TO STEP 16

OK: Go to next Step
PROBLEM SYMPTOMS TABLE CHAPTER 1
1. Refer to PROBLEM SYMPTOMS TABLE
NG: GO TO STEP 19

OK: Go to next Step
PROBLEM SYMPTOMS TABLE CHAPTER 2
1. Refer to PROBLEM SYMPTOMS TABLE .
COMPONENT INSPECTION
NEXT: GO TO STEP 21
DTC CHART
1. Refer to DIAGNOSTIC TROUBLE CODE CHART
CIRCUIT INSPECTION
IDENTIFICATION OF PROBLEM
REPAIR OR REPLACE
CONFIRMATION TEST
NEXT: END