Toyota Tundra Service Manual: Engine Coolant Temperature Gauge Malfunction

DESCRIPTION

In this circuit, the combination meter receives the engine coolant temperature signals from the ECM using the CAN communication lines. The combination meter displays an engine coolant temperature that is calculated based on the data received from the ECM.

WIRING DIAGRAM

PROCEDURE

1.

CHECK CAN COMMUNICATION SYSTEM

(a) Check if a CAN communication system DTC is output (See page ).

Result

Result

Proceed to

CAN communication system DTC is not output

A

CAN communication system DTC is output

B

B

Go to CAN COMMUNICATION SYSTEM

A

2.

CHECK SFI SYSTEM (ENGINE COOLANT TEMPERATURE)

(a) Check if a SFI system DTC is output.

  • for 1UR-FE (See page )
  • for 3UR-FE (See page )
  • for 3UR-FBE (See page )
Result

Result

Proceed to

SFI system DTC is not output

A

SFI system DTC (for 1UR-FE) is output

B

SFI system DTC (for 3UR-FE) is output

C

SFI system DTC (for 3UR-FBE) is output

D

A

REPLACE COMBINATION METER ASSEMBLY

B

Go to DIAGNOSTIC TROUBLE CODE CHART

C

Go to DIAGNOSTIC TROUBLE CODE CHART

D

Go to DIAGNOSTIC TROUBLE CODE CHART

    Dtc Check / Clear

    Entire Combination Meter does not Operate

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