Lexus ES manuals

Lexus ES: How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

*: Use the Techstream.

PROCEDURE

1.

VEHICLE BROUGHT TO WORKSHOP

NEXT

2.

CUSTOMER PROBLEM ANALYSIS

NEXT

3.

CONNECT TECHSTREAM TO DLC3*

HINT:

If the display indicates a communication malfunction, inspect the DLC3.

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

NEXT

4.

CHECK DTC AND FREEZE FRAME DATA*

(a) Check for DTCs.

Powertrain > Engine > Trouble Codes

(b) Check for freeze frame data.

Click here

HINT:

Record or print DTCs and freeze frame data if necessary.

NEXT

5.

CLEAR DTC AND FREEZE FRAME DATA*

(a) Clear the DTCs and freeze frame data.

Powertrain > Engine > Clear DTCs
NEXT

6.

CONDUCT VISUAL INSPECTION

NEXT

7.

SELECT CHECK MODE DIAGNOSIS*

(a) Switch the ECM from normal mode to check mode.

Powertrain > Engine > Utility

Tester Display

Check Mode

NEXT

8.

CONFIRM PROBLEM SYMPTOMS

(a) Confirm problem symptoms.

HINT:

If the engine does not start, first perform the "Check DTC" procedure and "Conduct Basic Inspection" procedure below.

Result

Proceed to

Malfunction does not occur

A

Malfunction occurs

B

B

GO TO STEP 10

A

9.

SIMULATE SYMPTOMS

HINT:

Refer to Symptom Simulation.

Click here

NEXT

10.

CHECK DTC*

(a) Check for DTCs.

Powertrain > Engine > Trouble Codes

Result

Proceed to

DTCs are output

A

DTCs are not output

B

B

GO TO STEP 12

A

11.

REFER TO DTC CHART

HINT:

Refer to Diagnostic Trouble Code Chart.

Click here

NEXT

12.

CONDUCT BASIC INSPECTION

(a) Conduct basic inspection.

Click here

Result

Proceed to

Malfunctioning parts not confirmed

A

Malfunctioning parts confirmed

B

B

GO TO STEP 17

A

13.

REFER TO PROBLEM SYMPTOMS TABLE

HINT:

Refer to Problem Symptoms Table.

Click here

Result

Proceed to

Malfunctioning circuit confirmed

A

Malfunctioning parts confirmed

B

B

GO TO STEP 17

A

14.

CHECK ECM POWER SOURCE CIRCUIT

(a) Check the ECM power source circuit.

Click here

NEXT

15.

CONDUCT CIRCUIT INSPECTION

Result

Proceed to

Malfunction not confirmed

A

Malfunction confirmed

B

B

GO TO STEP 18

A

16.

CHECK FOR INTERMITTENT PROBLEMS

(a) Check for intermittent problems.

Click here

NEXT

17.

CONDUCT PARTS INSPECTION

NEXT

18.

IDENTIFY PROBLEM

NEXT

19.

ADJUST AND/OR REPAIR

NEXT

20.

CONDUCT CONFIRMATION TEST

NEXT

END

READ NEXT:

 Check For Intermittent Problems

CHECK FOR INTERMITTENT PROBLEMS HINT: Inspect the vehicle ECM using check mode. Intermittent problems are easier to detect with the Techstream when the ECM is in check mode. In check mode, the ECM use

 Basic Inspection

CAUTION / NOTICE / HINT When a malfunction is not confirmed by the DTC check, troubleshooting should be carried out for all circuits considered to be possible causes of the problem. In many cases, by

 Registration

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 Removal

REMOVAL PROCEDURE 1. REMOVE FRONT WHEEL RH Click here 2. REMOVE FRONT FENDER APRON SEAL RH Click here 3. REMOVE V-BANK COVER SUB-ASSEMBLY Click here 4. REMOVE CAMSHAFT TIMING OIL CONTROL SOLENOID ASSEMBLY (for Exhaust Side of Bank 2) Click here 5. SET NO. 1 CYLINDER TO TDC/COMPRESSION

 Precaution

PRECAUTION CAUTION: Never perform work on fuel system components near any possible ignition sources. Vaporized fuel could ignite, resulting in a serious accident. Do not perform work on fuel system components without first disconnecting the cable from the negative (-) battery terminal. Sp

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