METER / GAUGE SYSTEM > Malfunction in Water Temperature Receiver Gauge

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WIRING DIAGRAM


E110305E01


INSPECTION PROCEDURE

HINT:
If there is an open or short in the engine coolant temperature sensor circuit, an SFI system DTC is output. If output, perform troubleshooting on the SFI system first.

1.PERFORM ACTIVE TEST BY INTELLIGENT TESTER

  1. Operate the intelligent tester according to the display and select the "Active Test".

    Combination meter:

    Item
    		Test Details
    		Diagnostic Note
    Water Temperature Meter Operation
    		LOW / NORMAL / HI
    		-

    OK:
    Needle indication is normal.



NG
REPLACE COMBINATION METER
OK


2.READ VALUE OF INTELLIGENT TESTER

  1. Operate the intelligent tester according to the display and select the "Data List".

    ECM:
    3GR-FE, 3GR-FSE

    Item
    		Measurement Item/Range (Display)
    		Normal Condition
    		Diagnostic Note
    Coolant Temp
    		Engine coolant Temperature/ Min.: -40°C, Max.: 140°C
    		After warming up: 80 to 105°C (176 to 221°F)
    		If value is -40°C (-40°F), sensor circuit is open.
    If value is 140°C (284°F), sensor circuit is shorted.

OK:
Coolant temperature displayed on the tester is between 80°C (176°F) and 105°C (221°F) after warming up.


ECM:
3UZ-FE

Item
Measurement Item/Range (Display)
Normal Condition
Diagnostic Note
Coolant Temp
Engine coolant Temperature/ Min.: -40°C, Max.: 140°C
After warming up: 75 to 95°C (167 to 203°F)
If value is -40°C (-40°F), sensor circuit is open.
If value is 140°C (284°F), sensor circuit is shorted.

OK:
Coolant temperature displayed on the tester is between 75°C (167°F) and 95°C (203°F) after warming up.



NG
GO TO ENGINE CONTROL SYSTEM
OK


3.REPLACE COMBINATION METER

OK:
Operation of combination meter returns to normal.



NG
GO TO ENGINE CONTROL SYSTEM
OK

END