Inspection Procedure

1. Confirm the symptoms.

   Result 

   RESULT CHART
   
   

   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: Go to step  3

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.
   3. Turn the engine switch on (IG).
      Fig 1: Combination Meter Circuit Diagram

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Result 

      RESULT CHART
      
      

      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: REPLACE COMBINATION METER  (See REMOVAL  )

A: Go to next step 

1. Disconnect the J34 connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   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

Fig 2: Identifying Harness And Connector (Combination Meter - Engine Oil Temperature Sensor)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Remove the engine oil temperature sensor.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   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

   Fig 3: Identifying Engine Oil Temperature Sensor Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   HINT:

   Reference

   Fig 4: Engine Oil Temperature Sensor Resistance Graph

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE ENGINE OIL TEMPERATURE SENSOR  (See ENGINE OIL TEMPERATURE SENSOR )

OK: REPLACE COMBINATION METER  (See REMOVAL  )

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 SPECIFIED CONDITION CHART
   
   

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

   Result 

   RESULT CHART
   
   

   Result	Proceed to
   NG	A
   OK	B

B: Go to step  7

Fig 5: Identifying E60 Engine Oil Temperature Sensor Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

A: Go to next step 

1. Disconnect the J34 connector
2. Measure the resistance according to the value(s) in the table below

   Standard Resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   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

Fig 6: Identifying Harness And Connector (Combination Meter - Engine Oil Temperature Sensor)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Remove the engine oil temperature sensor
2. Measure the resistance according to the value(s) in the table below

   Standard Resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   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 7: Identifying Engine Oil Temperature Sensor Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   Fig 8: Engine Oil Temperature Sensor Resistance Graph

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE ENGINE OIL TEMPERATURE SENSOR  (See REMOVAL )

OK: REPLACE COMBINATION METER  (See REMOVAL  )