Inspection Procedure

READ VALUE OF TECHSTREAM (START SWITCH)

Connect Techstream to the DLC3.

Check the DATA LIST for proper functioning of the start switch.

HINT:

When using Techstream with the engine switch off, turn on and off any of the door courtesy light switches repeatedly at 1.5 second intervals or less until communication between the tester and vehicle starts.

Main Body:

DIAGNOSTIC NOTE

Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
Start Switch 1	Start Switch 1/ON or OFF	ON: Engine switch on (IG) OFF: Engine switch off	-
Start Switch 2	Start Switch 2/ON or OFF	ON: Engine switch on (IG) OFF Engine switch off	-

OK: ON (engine switch on (IG)) and OFF (engine switch off) appear on the screen.

NG: Go to step 3

OK: Go to Next Step

CHECK ENGINE SWITCH CONDITION
1. Check the power source mode change.
  1. When the key is inside the vehicle and the shift lever is in the P position, check that pressing the engine switch causes the power source mode to change as follows.
    OK: off → on (ACC) → on (IG) → off
    
    HINT:
    - If power mode does not change to ON (IG and ACC), (See POWER SOURCE MODE DOES NOT CHANGE TO ON (IG AND ACC) ).
    - If power mode does not change to ON (IG), (See POWER SOURCE MODE DOES NOT CHANGE TO ON (IG) ).
    - If power mode does not change to ON (ACC), (See POWER SOURCE MODE DOES NOT CHANGE TO ON (ACC) ).
NG: GO TO OTHER PROBLEM

OK: END

INSPECT ENGINE SWITCH

Remove the engine switch.

Fig 1: Inspecting Engine Switch
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Disconnect the switch connector.

Measure the resistance according to the value(s) in the table below.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection (Symbols)	Switch Condition	Specified Condition
7 (SS1) - 5 (GND)	Pushed	Below 1 Ω
2 (SS2) - 5 (GND)	Pushed	Below 1 Ω
7 (SS1) - 5 (GND)	Not pushed	10 kΩ or higher
2 (SS2) - 5 (GND)	Not pushed	10 kΩ or higher

HINT:

This switch is a momentary type switch.

NG: REPLACE ENGINE SWITCH

OK: Go to Next Step

CHECK WIRE HARNESS (ENGINE SWITCH - MAIN BODY ECU AND BODY GROUND)

Disconnect the E61 ECU connector.

Fig 2: Identifying Engine Switch And Main Body ECU Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Disconnect the E68 switch connector.

Measure the resistance according to the value(s) in the table below.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection (Symbols)	Condition	Specified Condition
E68-7 (SS1) - E61-17 (SSW1)	Always	Below 1 Ω
E68-2 (SS2) - E61-16 (SSW2)	Always	Below 1 Ω
E68-5 (GND) - Body ground	Always	Below 1 Ω
E68-7 (SS1) or E61-17 (SSW1) - Body ground	Always	10 kΩ or higher
E68-2 (SS2) or E61-16 (SSW2) - Body ground	Always	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE MAIN BODY ECU