DESCRIPTION
In this circuit, the combination meter assembly receives engine coolant temperature signals from the ECM via CAN communication. The combination meter assembly displays the engine coolant temperature that is calculated based on the data received from the ECM.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Click here
HINT:
Click here
PROCEDURE
1. | CHECK CAN COMMUNICATION SYSTEM |
(a) Check if CAN communication DTCs are output.
Click here
Result | Proceed to |
---|---|
CAN communication DTCs are not output. | A |
CAN communication DTCs are output. | B |
B | ![]() | GO TO CAN COMMUNICATION SYSTEM |
|
2. | CONFIRM MODEL |
(a) Choose the model to be inspected.
Result | Proceed to |
---|---|
for Optitron Meter Type | A |
for TFT Meter Type | B |
B | ![]() | GO TO STEP 4 |
|
3. | PERFORM ACTIVE TEST USING TECHSTREAM (WATER TEMPERATURE METER OPERATION) |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Combination Meter / Active Test.
(e) Perform the Active Test according to the display on the Techstream.
Body Electrical > Combination Meter > Active Test Tester Display | Measurement Item | Control Range | Diagnostic Note |
---|---|---|---|
Water Temperature Meter Operation | Engine coolant temperature receiver gauge | OFF, LOW, NORMAL, HIGH | - |
Tester Display |
---|
Water Temperature Meter Operation |
OK:
Engine coolant temperature receiver gauge indication is normal.
NG | ![]() | REPLACE COMBINATION METER ASSEMBLY |
|
4. | READ VALUE USING TECHSTREAM (COOLANT TEMPERATURE) |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Combination Meter / Data List.
(e) Read the Data List according to the display on the Techstream.
Body Electrical > Combination Meter > Data List 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) | 75 to 100°C (167 to 212°F): After warming up engine | - |
Tester Display |
---|
Coolant Temperature |
OK:
Engine coolant temperature displayed on the Techstream is almost the same as the engine coolant temperature receiver gauge indication.
HINT:
NG | ![]() | REPLACE COMBINATION METER ASSEMBLY |
|
5. | CHECK FOR DTC |
(a) Check if SFI system DTCs are output.
Click here
Result | Proceed to |
---|---|
SFI system DTCs are not output. | A |
SFI system DTCs are output. | B |
B | ![]() | GO TO SFI SYSTEM |
|
6. | READ VALUE USING TECHSTREAM (COOLANT TEMP, COOLANT TEMPERATURE) |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus:
(1) for Engine: Powertrain / Engine / Data List.
(2) for Combination Meter: Body Electrical / Combination Meter / Data List.
(e) Read the Data List according to the display on the Techstream.
(1) Engine
Powertrain > Engine > Data List Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
---|---|---|---|---|
Coolant Temperature | Engine coolant temperature | Min.: -40°C (-40°F), Max.: 140°C (284°F) | 75 to 100°C (167 to 212°F): After warming up | This is the engine coolant temperature. HINT:
|
Tester Display |
---|
Coolant Temperature |
(2) Combination Meter
Body Electrical > Combination Meter > Data List 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) | 75 to 100°C (167 to 212°F): After warming up engine | - |
Tester Display |
---|
Coolant Temperature |
Result | Proceed to |
---|---|
Data List values of the ECUs match. | A |
Data List values of the ECUs do not match. | B |
HINT:
B | ![]() | REPLACE ECM |
|
7. | REPLACE COMBINATION METER ASSEMBLY |
(a) Replace the combination meter assembly with a new one.
Click here
OK:
The operation of the engine coolant temperature receiver gauge returns to normal.
OK | ![]() | END |
NG | ![]() | REPLACE ECM |
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