Inspection Procedure

1. Remove the engine switch.
   Fig 1: Inspecting Engine Switch

   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 will not illuminate.
   • If the voltage is too low, the indicator will not illuminate.

   OK 

   MEASUREMENT SPECIFIED CONDITION CHART
   
   

   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 E68 switch connector.
   Fig 2: Checking Wire Harness (Engine Switch - Main Body ECU And Body Ground)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the E61 ECU connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   E68-11 (SWIL) - E61-25 (SWIL)	Always	Below 1 Ω
   E68-12 (INDS) - E61-15 (INDS)	Always	Below 1 Ω
   E68-13 (INDW) - E61-14 (INDW)	Always	Below 1 Ω
   E68-5 (GND) - Body ground	Always	Below 1 Ω
   E68-4 (COM) - Body ground	Always	Below 1 Ω
   E68-11 (SWIL) or E61-25 (SWIL) - Body ground	Always	10 kΩ or higher
   E68-12 (INDS) or E61-15 (INDS) - Body ground	Always	10 kΩ or higher
   E68-13 (INDW) or E61-14 (INDW) - Body ground	Always	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPLACE MAIN BODY ECU