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

Toyota Tacoma (2015-2018) Service Manual / Meter / Gauge / Display / Meter / Gauge System / 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 ) .

PROCEDURE

1.	CHECK CAN COMMUNICATION SYSTEM

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

Result

Result	Proceed to
CAN communication DTC is not output	A
CAN communication DTC is output	B

GO TO CAN COMMUNICATION SYSTEM

2.	READ VALUE USING TECHSTREAM (COOLANT TEMPERATURE)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

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

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

Combination Meter

Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
Coolant Temperature	Engine coolant temperature/ Min.: 0°C (32°F), Max.: 127.5°C (261.5°F)	80 to 100°C (176 to 212°F); After warming up	-

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Coolant Temperature

Engine coolant temperature/

Min.: 0°C (32°F), Max.: 127.5°C (261.5°F)

80 to 100°C (176 to 212°F); After warming up

OK:

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

REPLACE COMBINATION METER ASSEMBLY

3.	CHECK ENGINE CONTROL SYSTEM

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

for 2TR-FE: (See page )
for 2GR-FKS: (See page )

Result

Result	Proceed to
Engine control DTC is not output	A
Engine control (for 2TR-FE) DTC is output	B
Engine control (for 2GR-FKS) DTC is output	C

REPLACE COMBINATION METER ASSEMBLY

GO TO SFI SYSTEM (for 2TR-FE)

GO TO SFI SYSTEM (for 2GR-FKS)

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