Toyota Venza: 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
.gif)
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 | .gif) |
GO TO CAN COMMUNICATION SYSTEM |
|
.gif)
|
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 |
|
|
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) |
|
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 |
|
|
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 |
|
|
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 |
|
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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