Toyota Tundra Service Manual: 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 fault in the Techstream, 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 (Click here ) and 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 DTCs and freeze frame data.

Click here

NEXT

6.

CONDUCT VISUAL INSPECTION

NEXT

7.

SET CHECK MODE DIAGNOSIS*

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

HINT:

Refer to Check Mode Procedure.

Click here

NEXT

8.

CONFIRM PROBLEM SYMPTOMS

(a) Confirm problem symptoms.

HINT:

  • Refer to Problem Symptoms Table.

    Click here

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

HINT:

Refer to DTC Check / Clear.

Click here

Result

Proceed to

Trouble code

A

No code

B

B

GO TO STEP 12

A

11.

REFER TO DTC CHART

(a) 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

(a) 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.

HINT:

Refer to 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.

HINT:

Refer to 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

    Fuel Pump Control Circuit

    Initialization

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