Toyota Tacoma (2015-2018) Service Manual: Engine Coolant Temperature Receiver Gauge Malfunction

DESCRIPTION

In this circuit, the meter CPU receives engine coolant temperature signals from the ECM using the CAN communication system (CAN V1 Bus). The meter CPU displays engine coolant temperature that is calculated based on the data received from the ECM.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

HINT:

If there is an open or short in the engine coolant temperature sensor circuit, the ECM stores the DTCs. Troubleshoot the SFI System (for 2TR-FE) (See page ) or SFI System (for 2GR-FKS) (See page ) .

PROCEDURE

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

B

GO TO CAN COMMUNICATION SYSTEM

A

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Combination Meter / Data List.

(e) According to the display on the Techstream, read the Data List.

OK:

Engine coolant temperature value displayed on the Techstream is almost the same as the engine coolant temperature receiver gauge indication.

NG

REPLACE COMBINATION METER ASSEMBLY

OK

(a) Check if a engine control DTC is output.

A

REPLACE COMBINATION METER ASSEMBLY

B

GO TO SFI SYSTEM (for 2TR-FE)

C

GO TO SFI SYSTEM (for 2GR-FKS)