Oil Temperature Gauge Malfunction: Procedure

1. Confirm the symptoms.

   Result

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

B → See step   5 

A: Go to next step 

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.
      Fig 1: Combination Meter Circuit Diagram

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   3. Turn the engine switch on (IG).

      Result

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

   4. Turn the engine switch off.

B → See step   9 

A: Go to next step 

1. Disconnect the J34 connector.
   Fig 2: Checking Harness And Connector Between Combination Meter And Engine Oil Temperature Sensor

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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: Go to next step 

1. Remove the engine oil temperature sensor.
   Fig 3: Identifying Engine Oil Temperature Sensor Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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

   HINT: 

   Reference

   Fig 4: Engine Oil Temperature Sensor Resistance Graph

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG → See step   8 

OK → See step   9 

1. Disconnect the E60 engine oil temperature sensor connector.
   Fig 5: Identifying E60 Engine Oil Temperature Sensor Harness Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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

   Result

   Result	Proceed to
   NG	A
   OK	B

B → See step   7 

A: Go to next step 

1. Disconnect the J34 connector.
   Fig 6: Checking Harness And Connector Between Combination Meter And Engine Oil Temperature Sensor

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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: Go to next step 

1. Remove the engine oil temperature sensor.
   Fig 7: Identifying Engine Oil Temperature Sensor Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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

   HINT: 

   Reference

   Fig 8: Engine Oil Temperature Sensor Resistance Graph

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG → See step   8 

OK → See step   9