How To Proceed With Troubleshooting

WARNING: This page is about a different car, the 2010 Lexus GS 450h. However, it is still accessible from the selected car via links, so may be relevant.

HINT:

*: Use the Techstream.

VEHICLE BROUGHT TO WORKSHOP
NEXT: Go to next step
CUSTOMER PROBLEM ANALYSIS
NEXT: Go to next step
CONNECT TECHSTREAM TO THE DLC3*
HINT:

If the display on the tester indicates a communication fault, inspect the DLC3.

NEXT: Go to next step
CHECK DTC AND SAVE FREEZE FRAME DATA*. Refer to DTC CHECK / CLEAR . Refer to INFORMATION / FREEZE FRAME DATA
HINT:

Make sure to save freeze frame data because the data is necessary for a simulation test.

NEXT: Go to next step
CLEAR DTC AND FREEZE FRAME DATA*. Refer to DTC CHECK / CLEAR
NEXT: Go to next step
CONDUCT VISUAL INSPECTION
NEXT: Go to next step

CONFIRM PROBLEM SYMPTOMS

HINT:

If the engine does not start, perform steps 9 and 11 first.

Result

Result	Proceed to
Malfunction does not occur	A
Malfunction occurs	B

B → GO TO 10 STEP 10

A: Go to next step

DUPLICATE CONDITIONS THAT PRODUCE SYMPTOMS
NEXT: Go to next step

CHECK FOR DTCS*. Refer to DTC CHECK / CLEAR

Result

Result	Proceed to
Trouble code	A
No code	B

B → GO TO 11 STEP 11

A: Go to next step

REFER TO DTC CHART. Refer to DIAGNOSTIC TROUBLE CODE CHART
NEXT → GO TO 13 STEP 13

CONDUCT BASIC INSPECTION

Result

Result	Proceed to
Malfunctioning parts not confirmed	A
Malfunctioning parts confirmed	B

B → GO TO 15 STEP 15

A: Go to next step

CHECK ECU POWER SOURCE CIRCUIT
NEXT: Go to next step

CONDUCT CIRCUIT INSPECTION

Result

Result	Proceed to
Malfunction not confirmed	A
Malfunction confirmed	B

B → GO TO 16 STEP 16

A: Go to next step

CHECK FOR INTERMITTENT PROBLEMS. Refer to CHECK FOR INTERMITTENT PROBLEMS
NEXT → GO TO 16 STEP 16
CONDUCT PARTS INSPECTION
NEXT: Go to next step
IDENTIFY PROBLEM
NEXT: Go to next step
ADJUST AND/OR REPAIR
NEXT: Go to next step
CONDUCT CONFIRMATION TEST
NEXT → END