Toyota Venza manuals

Toyota Venza: Engine Coolant Temperature Receiver Gauge Malfunction

Toyota Venza 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 No. 1 Bus). The meter CPU displays engine coolant temperature that is calculated based on the data received from the ECM.

WIRING DIAGRAM

1. for 2GR-FE


2. for 1AR-FE


CAUTION / NOTICE / HINT

HINT:

If there is an open or short in the engine coolant temperature sensor circuit, the ECM stores the DTCs. Refer to troubleshoot SFI System (See page for 2GR-FE,
for 1AR-FE).


PROCEDURE

1.

CHECK CAN COMMUNICATION SYSTEM

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


Result

Proceed to

CAN communication DTC is not output.

A

CAN communication DTC is output.

B


B

GO TO CAN COMMUNICATION SYSTEM


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) Check the operation by referring to the table below.

Combination Meter

Tester Display

Test Part

Control Range

Diagnostic Note

Water Temperature Meter Operation

Engine coolant temperature receiver gauge

Low, Normal, High

Confirm that the vehicle is stopped with the engine idling

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) Check the values by referring to the table below.

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)

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

  • If -40°C (-40°F): Sensor circuit open
  • If 140°C (284°F) or more: Sensor circuit shorted

OK:

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


NG

REPLACE COMBINATION METER ASSEMBLY


OK

4.

READ VALUE USING TECHSTREAM (COOLANT TEMP)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Engine and ECT / Data List.

(e) Check the values by referring to the table below.

Engine and ECT (for 2GR-FE)

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Engine Speed

Vehicle speed/Min.: 0 rpm, Max.: 16383 rpm

600 to 700 rpm (When idling)

-

Coolant Temp

Engine coolant temperature/Min.: -40°C (-40°F), Max: 215°C (419°F)

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

  • If -40°C (-40°F): sensor circuit open
  • If 140°C (284°F) or more: sensor circuit shorted
Engine and ECT (for 1AR-FE)

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Engine Speed

Vehicle speed/Min.: 0 rpm, Max.: 16383 rpm

600 to 700 rpm (When idling)

-

Coolant Temp

Engine coolant temperature/Min.: -40°C (-40°F), Max: 140°C (284°F)

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

  • If -40°C (-40°F): sensor circuit open
  • If 140°C (284°F) or more: sensor circuit shorted

OK:

Engine coolant temperature value displayed on the Techstream is almost the same as the Techstream indication (Body Electrical / Combination Meter / Data List).

Result

Proceed to

OK

A

NG (for 2GR-FE)

B

NG (for 1AR-FE)

C


A

REPLACE COMBINATION METER ASSEMBLY


B

REPLACE ECM (for 2GR-FE)


C

REPLACE ECM (for 1AR-FE)

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