Engine Switch Indicator Circuit: Procedure

1. Remove the engine switch (for 2GR-FSE: Refer to REMOVAL , for 4GR-FSE: Refer to REMOVAL ).
   Fig 1: Identifying Engine Switch Connector Terminals

   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

   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

3. Proceed to next step based on inspection result.

   Result	Proceed to
   OK	A
   NG (for 2GR-FSE)	B
   NG (for 4GR-FSE)	C

C → See step   4 

B → See step   3 

A: Go to next step 

1. Disconnect the J31 switch connector.
   Fig 2: Identifying J55 And J31 Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   TEXT IN ILLUSTRATION
   
   

   *1	Front view of wire harness connector (to Engine Switch)
   *2	Front view of wire harness connector (to Power Source Control ECU)

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

   Standard Resistance

   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 

OK → See step   5