Engine Coolant Temperature Gauge Malfunction [09/2015 - ]: Procedure

1. Check for DTC (Refer to DIAGNOSIS SYSTEM [09/2015 - ] ).
   RESULT
   
   

   Result	Proceed to
   CAN communication system DTC is not output	A
   CAN communication system DTC is output	B

Result:  B

B 

Go to CAN COMMUNICATION SYSTEM 

(Refer to PRECAUTION [09/2015 - ] )

Result:  A

A 

See step  2

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

   OK

   Needle indication is normal.

   COMBINATION METER
   
   

   Tester Display	Test Part	Control Range
   Water Temperature Meter Operation	Engine coolant temperature receiver gauge	Low, Normal or High

   HINT: 

   Confirm that the vehicle is stopped and engine is idling.

Result:  NG

NG 

REPLACE NO. 1 METER ECU 

(Refer to DISASSEMBLY [09/2015 - ] )

Result:  OK

OK 

See step  3

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

   OK

   Coolant temperature displayed on Techstream is between 80°C (176°F) and 95°C (203°F) after warming up.

   COMBINATION METER
   
   

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

Result:  OK

OK 

REPLACE NO. 1 METER ECU 

(Refer to DISASSEMBLY [09/2015 - ] )

Result:  NG

NG 

See step  4

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

   OK

   Engine coolant temperature value displayed on Techstream is almost the same as actual engine coolant temperature.

   ENGINE
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Water Temperature	Engine coolant temperature / Min.: -40°C (-40°F), Max.: 140°C (284°F)	After warming up: 80 to 105°C (176 to 221°F)	-

Result:  NG

NG 

Go to SFI SYSTEM 

(Refer to PROBLEM SYMPTOMS TABLE [09/2015 - ] )

Result:  OK

OK 

See step  5

1. Temporarily replace the No. 1 meter ECU with a new one (Refer to DISASSEMBLY [09/2015 - ] ).

Result:  NEXT

NEXT 

See step  6

1. Check the operation of the combination meter returns to normal (Refer to OPERATION CHECK [09/2015 - ] ).

   OK

   Operation of combination meter returns to normal.

Result:  OK

OK 

END (NO. 1 METER ECU IS DEFECTIVE) 

Result:  NG

NG 

REPLACE ECM 

(Refer to REMOVAL [09/2015 - ] )