DESCRIPTION
In this circuit, the meter CPU receives engine coolant temperature signals from the ECM using the CAN communication system. The meter CPU displays the engine coolant temperature, which 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 ).
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 |
|
2. |
PERFORM ACTIVE TEST USING TECHSTREAM (WATER TEMPERATURE METER OPERATION) |
(a) Operate the Techstream according to the display and select the Active Test (See page ).
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) Operate the Techstream according to the display and select the Data List (See page ).
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
---|---|---|---|
Coolant Temperature |
Engine coolant temperature/16 to 127°C (60.8 to 260.6°F) |
After warming up: 80 to 95°C (176 to 203°F) |
|
OK:
Engine coolant temperature value displayed on the Techstream is almost the same as the engine coolant temperature receiver gauge indication.
(b) Record the temperature displayed on the Techstream.
NG |
REPLACE COMBINATION METER ASSEMBLY |
|
4. |
READ VALUE USING TECHSTREAM (COOLANT TEMP) |
(a) Operate the Techstream according to the display and select the Data List (See page ).
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
---|---|---|---|
Coolant Temp |
Engine coolant temperature/Min.: -40°C (-40°F), Max.: 215°C (419°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 the previously recorded Techstream indication (Body Electrical / Combination Meter / Data List / Coolant Temperature).
OK |
REPLACE COMBINATION METER ASSEMBLY |
NG |
REPLACE ECM |
Lost Communication with Rear Floor Airbag Sensor RH (B1676/85,B1677/85)
DESCRIPTION
HINT:
"Rear floor airbag sensor RH" refers to the rear floor side airbag sensor.
The rear floor side airbag sensor circuit consists of the center airbag
sensor and rear floor side airbag sensor.
The rear floor side airba ...
System Description
SYSTEM DESCRIPTION
1. ENGINE IMMOBILISER SYSTEM DESCRIPTION
(a) The engine immobiliser system is designed to prevent the vehicle from being
stolen. This system uses a transponder key ECU assembly that stores the key codes
of authorized ignition keys. If ...