Toyota Tundra Service Manual: How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

  • Use this procedure to troubleshoot the engine immobiliser system.
  • *: Use the Techstream.

PROCEDURE

1.

VEHICLE BROUGHT TO WORKSHOP

NEXT

2.

CUSTOMER PROBLEM ANALYSIS

HINT:

  • In troubleshooting, confirm that the problem symptoms have been accurately identified. Preconceptions should be discarded in order to make an accurate judgment. To clearly understand what the problem symptoms are, it is extremely important to ask the customer about the problem and the conditions at the time the malfunction occurred.
  • Gather as much information as possible for reference. Past problems that seem unrelated may also help in some cases.
  • The following 5 items are important points for problem analysis:

What

Vehicle model, system name

When

Date, time, occurrence frequency

Where

Whether the problem occurs at a specific location

Under what conditions?

Whether the doors were locked or unlocked, whether the ignition switch was on, whether the engine was running.

How did it happen?

Problem symptoms

NEXT

3.

INSPECT BATTERY VOLTAGE

(a) Measure the battery voltage.

Standard voltage:

11 to 14 V

If the voltage is below 11 V, recharge or replace the battery before proceeding to the next step.

NEXT

4.

CRANK ENGINE FOR MORE THAN 10 SECONDS

NEXT

5.

CHECK FOR DTC* (ECM)

(a) Check for DTCs and note any codes that are output.

Click here

HINT:

Before checking for DTCs, perform the "DTC Output Confirmation Operation" of each diagnostic procedure.

Result

Proceed to

DTCs are not output

A

SFI system DTCs are output (for 1UR-FE)

B

SFI system DTCs are output (for 3UR-FE)

C

SFI system DTCs are output (for 3UR-FBE)

D

Engine immobiliser system DTCs are output

E

B

GO TO DIAGNOSTIC TROUBLE CODE CHART

C

GO TO DIAGNOSTIC TROUBLE CODE CHART

D

GO TO DIAGNOSTIC TROUBLE CODE CHART

E

GO TO DIAGNOSTIC TROUBLE CODE CHART

A

6.

CHECK FOR DTC* (TRANSPONDER KEY ECU ASSEMBLY)

(a) Check for DTCs and note any codes that are output.

Click here

HINT:

Before checking for DTCs, perform the "DTC Output Confirmation Operation" of each diagnostic procedure.

Result

Proceed to

DTCs are not output

A

Engine immobiliser system DTCs are output

B

B

GO TO DIAGNOSTIC TROUBLE CODE CHART

A

7.

PROBLEM SYMPTOMS TABLE

(a) Refer to Problem Symptoms Table.

Click here

Result

Proceed to

Fault is not listed in problem symptoms table

A

Fault is listed in problem symptoms table

B

B

GO TO STEP 9

A

8.

OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) Data List / Active Test.

Click here

(b) Terminals of ECU.

Click here

NEXT

9.

REPAIR OR REPLACE

HINT:

If the transponder key ECU assembly, ECM, or key are replaced, refer to Registration.

Click here

NEXT

10.

CHECK FOR DTC*

(a) Clear the DTCs.

Click here

(b) Check for DTCs.

Click here

HINT:

Before checking for DTCs, perform the "DTC Output Confirmation Operation" of each diagnostic procedure.

Result

Proceed to

DTCs are not output

A

Engine immobiliser system DTCs are output

B

A

END

B

GO TO DIAGNOSTIC TROUBLE CODE CHART

    Engine does not Start but Initial Combustion Occurs

    Key Cannot be Registered

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