Toyota Tundra Service Manual: How To Proceed With Troubleshooting

Toyota Tundra Service Manual / Power Source, Network / Multiplex Communication / Lin Communication System / How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

  • Use these procedures to troubleshoot the LIN communication system.
  • *: Use the Techstream.

PROCEDURE

1.

VEHICLE BROUGHT TO WORKSHOP
NEXT

2.

INSPECT BATTERY VOLTAGE

Standard Voltage:

11 to 14 V

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

NEXT

3.

CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*

(a) Using the Techstream, inspect the CAN communication function to ensure there are no malfunctions in the CAN communication system.

Click here

Result

Proceed to

No DTCs output

A

DTCs output

B
B

GO TO CAN COMMUNICATION SYSTEM

A

4.

CHECK FOR DTC*

(a) Check for DTCs.

Click here

(b) Clear the DTCs.

Click here

(c) Recheck for DTCs.

Click here

Result

Proceed to

DTC output does not reoccur

A

DTC output reoccurs

B
B

GO TO DIAGNOSTIC TROUBLE CODE CHART

A

5.

PROBLEM SYMPTOMS TABLE

(a) Refer to the 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 6

A

6.

OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) Terminals of ECU

Click here

(b) Data List / Active Test

Click here

NEXT

7.

REPAIR OR REPLACE
NEXT

END
    Dtc Check / Clear

    Integration Control and Panel Assembly Communication Error

    See More:

    Toyota Tundra Service Manual > Meter / Gauge System: Communication with BODY ECU (Receive) (U0142)
    DESCRIPTION The combination meter assembly communicates with the main body ECU (multiplex network body ECU) via the CAN line. DTC Code DTC Detection Condition Trouble Area U0142 When either of following conditions is detected: IG voltage 10.5 V or more No communication with main body ECU (multiplex ...

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