Inspection Procedure

HINT:

• If DTC U0100 has been stored, troubleshoot the CAN communication system first.
• 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.

1. PERFORM ACTIVE TEST BY TECHSTREAM (COOLANT HOT) 
   1. Connect the Techstream to the DLC3.
   2. Turn the ignition switch ON and turn the tester ON.
   3. Enter the following menus: Body Electrical / Combination Meter / Active Test.

      Body Electrical / Combination Meter / Active Test: 

      BODY ELECTRICAL / COMBINATION METER / ACTIVE TEST
      
      

      Tester Display	Test Part	Control Range
      Indicate. Lamp Coolant Hot	ON: Engine coolant temperature warning light flashes OFF: Engine coolant temperature warning light turns off	-
      Indicate. Lamp Coolant Cool	ON: Engine coolant temperature indicator light flashes OFF: Engine coolant temperature indicator light turns off	-
      Water Temperature Meter Operation	HIGH: Engine coolant temperature warning light flashes NORMAL: Engine coolant temperature warning light and indicator light turns off LOW: Engine coolant temperature indicator light illuminates	-

      OK: 

      Both the engine coolant temperature warning light and indicator light are operated in accordance with the tester instructions. 

   NG: REPLACE COMBINATION METER ASSEMBLY 

   OK: Go to Next Step 

2. READ VALUE OF TECHSTREAM (COOLANT TEMP) 
   1. Connect the Techstream to the DLC3.
   2. Turn the ignition switch ON and turn the tester ON.
   3. Select the item below from the Data List, and read the value displayed on the Techstream.

      Body Electrical / Combination Meter / Data List: 

      BODY ELECTRICAL / COMBINATION METER / DATA LIST
      
      

      Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
      Coolant Temperature	Engine coolant temperature /Min.: 0°C, Max.: 127.5°C	After warming up: 75 to 105°C (167 to 221°F)	-

      HINT:

      • If the value is 0°C (32°F), the sensor circuit is open.
      • If the value is 127.5°C (262°F), the sensor circuit is shorted.

      OK: 

      Coolant temperature displayed on the tester is between 75°C (167°F) and 105°C (221°F) after warming up. 

   NG:  GO TO SFI SYSTEM

   OK: REPLACE COMBINATION METER ASSEMBLY