METER / GAUGE SYSTEM Oil Temperature Gauge Malfunction

DESCRIPTION

The meter CPU uses the engine oil temperature sensor to determine the temperature of the engine oil. The resistance of the engine oil temperature sensor will vary between approximately 30 kΩ or higher with the engine oil temperature is 0°C (32°F), and 0.3 kΩ with the engine oil temperature is 155°C (311°F). Voltage measured at this point will vary as the engine temperature is changed.

The engine oil temperature gauge displays the engine oil temperature using seven bars. The meter CPU calculates the engine oil temperature based on signals from the engine oil temperature sensor via the direct line. When the engine oil temperature becomes 140°C (284°F) or higher, all the bar blinks and the warning message is displayed in the multi-information display.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. SYSTEM CHECK

   
   

   1. Confirm the symptoms.

      Result
      Result Proceed to The lowest bar in the oil temperature gauge blinks. A All the bars in the oil temperature gauge blink and the oil temperature warning light comes on. B

   
   

   B

   INSPECT COMBINATION METER (OUTPUT VOLTAGE) Click here

   A

2. INSPECT COMBINATION METER (CHECK FOR AN OPEN)

   
   

   1. Check the combination meter operation.

      
      

      1. Disconnect the E60 connector.

      2. Connect terminals 1 and 2 of the combination meter connector on the wire harness side.

         

      3. Turn the engine switch on (IG).

         Result
         Result Proceed to The lowest bar in the oil temperature gauge does not blink. A The lowest bar in the oil temperature gauge blinks. B

      4. Turn the engine switch off.

   
   

   B

   REPLACE COMBINATION METER Click here

   A

3. CHECK HARNESS AND CONNECTOR (COMBINATION METER - ENGINE OIL TEMPERATURE SENSOR)

   
   

   1. Disconnect the J34 connector.

   2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition J34-3 (GND) - E60-1 (OT-) Always Below 1 Ω J34-7 (GAGE) - E60-2 (OT+) Always Below 1 Ω

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

4. INSPECT ENGINE OIL TEMPERATURE SENSOR

   
   

   1. 

      Remove the engine oil temperature sensor.

   2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition 1 (OT-) - 2 (OT+) Oil temperature is 100°C (212°F) 1 kΩ 1 (OT-) - 2 (OT+) Oil temperature is 125°C (257°F) 0.5 kΩ

      Tech Tips

      Reference

      

   
   

   NG

   REPLACE ENGINE OIL TEMPERATURE SENSOR Click here

   OK

   REPLACE COMBINATION METER Click here

5. INSPECT COMBINATION METER (OUTPUT VOLTAGE)

   
   

   1. 

      Disconnect the E60 engine oil temperature sensor connector.

   2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition E60-2 (OT+) - Body ground Engine switch on (IG) 4 to 6 V

   
   

   NG

   REPLACE COMBINATION METER Click here

   OK

6. CHECK HARNESS AND CONNECTOR (COMBINATION METER - ENGINE OIL TEMPERATURE SENSOR)

   
   

   1. Disconnect the J34 connector.

   2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition J34-3 (GND) - Body ground Always 10 kΩ or higher E60-2 (OT+) - Body ground Always 10 kΩ or higher

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

7. INSPECT ENGINE OIL TEMPERATURE SENSOR

   
   

   1. 

      Remove the engine oil temperature sensor.

   2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition 1 (OT-) - 2 (OT+) Oil temperature is 0°C (32°F) 23.7 to 30.7 kΩ 1 (OT-) - 2 (OT+) Oil temperature is 125°C (257°F) 0.5 to 0.6 kΩ

      Tech Tips

      Reference

      

   
   

   NG

   REPLACE ENGINE OIL TEMPERATURE SENSOR Click here

   OK

   REPLACE COMBINATION METER Click here