Inspection Procedure

1. Remove the engine switch (See INSPECTION )
   Fig 1: Identifying Indicator Light Connector Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Apply battery voltage between the terminals of the switch, and check the illumination condition of the switch
   NOTE:

   • If the positive (+) lead and the negative (-) lead are incorrectly connected, the engine switch indicator does not illuminate.
   • If the voltage is too low, the indicator will not illuminate.

   OK 

   ITEM RANGE REFERENCE
   
   

   Measurement Condition	Specified Condition
   Battery positive (+) → Terminal 11 (SWIL) Battery negative (-) → Terminal 4 (COM) or 5 (GND)	Illuminates
   Battery positive (+) → Terminal 12 (INDS) Battery negative (-) → Terminal 4 (COM) or 5 (GND)	Illuminates
   Battery positive (+) → Terminal 13 (INDW) Battery negative (-) → Terminal 4 (COM) or 5 (GND)	Illuminates

NG: REPLACE ENGINE SWITCH 

OK: Go to next Step 

1. Disconnect the J31 switch connector
2. Disconnect the J55 ECU connector.
3. Measure the resistance according to the value (s) in the table below

   Standard Resistance 

   RESISTANCE REFERENCE
   
   

   Tester Connection	Condition	Specified Condition
   J31-11 (SWIL) - J55-36 (SWIL)	Always	Below 1 Ω
   J31-12 (INDS) - J55-4 (INDS)	Always	Below 1 Ω
   J31-13 (INDW) - J55-13 (INDW)	Always	Below 1 Ω
   J31-5 (GND) - Body ground	Always	Below 1 Ω
   J31-4 (COM) - Body ground	Always	Below 1 Ω
   J31-11 (SWIL) or J55-36 (SWIL) - Body ground	Always	10 kΩ or higher
   J31-12 (INDS) or J55-4 (INDS) - Body ground	Always	10 kΩ or higher
   J31-13 (INDW) or J55-13 (INDW) - Body ground	Always	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

Fig 2: Identifying J31 Switch Connector Terminal And J55 ECU Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: REPLACE POWER SOURCE CONTROL ECU