Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000ZP1G
Model Year Start: 2017 Model: Sienna Prod Date Range: [08/2016 -           ]
Title: METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM: Engine Coolant Temperature Receiver Gauge Malfunction; 2017 - 2020 MY Sienna [08/2016 -        ]

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 (See page 2017 MY Sienna [08/2016 - 11/2017]; 2GR-FKS (ENGINE CONTROL): SFI SYSTEM: DIAGNOSTIC TROUBLE CODE CHART 2018 MY Sienna [11/2017 - 08/2018]; 2GR-FKS (ENGINE CONTROL): SFI SYSTEM: DIAGNOSTIC TROUBLE CODE CHART 2019 - 2020 MY Sienna [08/2018 -        ]; 2GR-FKS (ENGINE CONTROL): SFI SYSTEM: DIAGNOSTIC TROUBLE CODE CHART ).

PROCEDURE

1.

CHECK CAN COMMUNICATION SYSTEM

(a) Check if a CAN communication DTC is output (See page 2017 MY Sienna [08/2016 - 11/2017]; NETWORKING: CAN COMMUNICATION SYSTEM: DIAGNOSIS SYSTEM 2018 MY Sienna [11/2017 - 08/2018]; NETWORKING: CAN COMMUNICATION SYSTEM: DIAGNOSIS SYSTEM 2019 - 2020 MY Sienna [08/2018 -        ]; NETWORKING: CAN COMMUNICATION SYSTEM: DIAGNOSIS SYSTEM ).

Result

Result

Proceed to

CAN communication DTC is not output

A

CAN communication DTC is output

B

B

GO TO CAN COMMUNICATION SYSTEM 2017 MY Sienna [08/2016 - 11/2017]; NETWORKING: CAN COMMUNICATION SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING 2018 - 2020 MY Sienna [11/2017 -        ]; NETWORKING: CAN COMMUNICATION SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING

A

2.

PERFORM ACTIVE TEST USING TECHSTREAM (WATER TEMPERATURE METER OPERATION)

(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 / Active Test.

(e) According to the display on the Techstream, perform the Active Test.

Combination Meter

Tester Display

Test Part

Control Range

Diagnostic Note

Water Temperature Meter Operation

Engine coolant temperature receiver gauge

OFF, LOW, NORMAL, HIGH

Operate with IG ON and the vehicle is stopped.

OK:

Engine coolant temperature receiver gauge indication is normal.

NG

REPLACE COMBINATION METER ASSEMBLY

OK

3.

READ VALUE USING TECHSTREAM (COOLANT TEMPERATURE)

(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.

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

-

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

4.

CHECK ENGINE CONTROL SYSTEM

(a) Check if a engine control DTC is output (See page 2017 - 2020 MY Sienna [08/2016 -        ]; 2GR-FKS (ENGINE CONTROL): SFI SYSTEM: DTC CHECK / CLEAR ).

Result

Result

Proceed to

Engine control DTC is not output

A

Engine control DTC is output

B

A

REPLACE COMBINATION METER ASSEMBLY

B

GO TO SFI SYSTEM