How To Proceed With Troubleshooting [09/2014 - 10/2015]: Procedure

WARNING: This page is about a different car, the 2015 Lexus GS 350. However, it is still accessible from the selected car via links, so may be relevant.

VEHICLE BROUGHT TO WORKSHOP
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CUSTOMER PROBLEM ANALYSIS
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CONNECT TECHSTREAM TO DLC3*
HINT:

If the display indicates a communication fault with the Techstream, inspect the DLC3.

When any CAN communication system DTCs are output, perform troubleshooting on the CAN communication system first.

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CHECK DTC AND FREEZE FRAME DATA*

Check for DTCs (Refer to DTC CHECK / CLEAR [09/2014 - 10/2015] ) and freeze frame data (Refer to FREEZE FRAME DATA [09/2014 - 10/2015] ).

HINT:

Record or print DTCs and freeze frame data, if necessary.

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CLEAR DTC AND FREEZE FRAME DATA*

Clear the DTCs and freeze frame data (Refer to DTC CHECK / CLEAR [09/2014 - 10/2015] ).

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CONDUCT VISUAL INSPECTION
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SELECT CHECK MODE DIAGNOSIS*
HINT:

Refer to Check Mode Procedure (Refer to CHECK MODE PROCEDURE [09/2014 - 10/2015] ).

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CONFIRM PROBLEM SYMPTOMS

HINT:

Refer to Problem Symptoms Table (Refer to PROBLEM SYMPTOMS TABLE [09/2014 - 10/2015] ).
If the engine does not start, first perform the "Check DTC" procedure and "Conduct Basic Inspection" procedure below.

Result

Result	Proceed to
Malfunction does not occur	A
Malfunction occurs	B

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SIMULATE SYMPTOMS
HINT:

Refer to Symptom Simulation (Refer to PROBLEM SYMPTOMS TABLE [09/2014 - 10/2015] ).

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See step 10

CHECK DTC*

HINT:

Refer to DTC Check / Clear (Refer to DTC CHECK / CLEAR [09/2014 - 10/2015] ).

Result

Result	Proceed to
Trouble code	A
No code	B

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REFER TO DTC CHART
HINT:

Refer to Diagnostic Trouble Code Chart (Refer to DIAGNOSTIC TROUBLE CODE CHART [09/2014 - 10/2015] ).

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CONDUCT BASIC INSPECTION

Result

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

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REFER TO PROBLEM SYMPTOMS TABLE

HINT:

Refer to Problem Symptoms Table (Refer to PROBLEM SYMPTOMS TABLE [09/2014 - 10/2015] ).

Result

Result	Proceed to
Malfunctioning circuit confirmed	A
Malfunctioning parts confirmed	B

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See step 17

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CHECK ECM POWER SOURCE CIRCUIT
HINT:

Refer to ECM Power Source Circuit (Refer to ECM Power Source Circuit [09/2014 - 10/2015] ).

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See step 15

CONDUCT CIRCUIT INSPECTION

Result

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Malfunction not confirmed	A
Malfunction confirmed	B

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See step 18

Result:

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CHECK FOR INTERMITTENT PROBLEMS

Check for intermittent problems.

HINT:

Refer to Check for Intermittent Problems (Refer to CHECK FOR INTERMITTENT PROBLEMS [09/2014 - 10/2015] ).

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CONDUCT PARTS INSPECTION
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See step 18
IDENTIFY PROBLEM
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See step 19
ADJUST AND/OR REPAIR
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See step 20
CONDUCT CONFIRMATION TEST
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