Inspection Procedure
WARNING: This page is about a different variant/trim than selected.
- READ VALUE USING TECHSTREAM (START SWITCH 1 AND 2)
- Connect the Techstream to the DLC3.
- Turn the engine switch on (IG) and turn the Techstream on.
- Enter the following menus: Body Electrical / Main Body / Data List.
- Read the value displayed on the Techstream.
Main Body
MAIN BODY - DATA LISTTester 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:
When the engine switch is turned on (IG), ON appears on the Techstream screen.
NG: Go to step 3
OK: Go to next step
- CHECK SWITCH CONDITION (ENGINE SWITCH)
- Make sure that the electrical key is inside the cabin.
- With the shift lever in P, check that the power source mode changes as shown below each time the engine switch is pushed.
OK:
off → on (ACC) → on (IG) → off
NG: GO TO POWER SOURCE MODE DOES NOT CHANGE (See )
OK: USE SIMULATION METHOD TO CHECK (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE )
- INSPECT ENGINE SWITCH
- Remove the engine switch (See INSPECTION ).
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
RESISTANCE SPECIFICATIONTester Connection 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 NG: REPLACE ENGINE SWITCH (See REMOVAL )
OK: Go to next step
- CHECK HARNESS AND CONNECTOR (ENGINE SWITCH - MAIN BODY ECU AND BODY GROUND)
- Disconnect the E78 engine switch connector.
- Disconnect the E16 main body ECU connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
RESISTANCE SPECIFICATIONTester Connection Condition Specified Condition E78-7 (SS1) - E16-10 (SSW1) Always Below 1 Ω E78-2 (SS2) - E16-9 (SSW2) Always Below 1 Ω E78-5 (GND) - Body ground Always Below 1 Ω E78-7 (SS1) or E16-10 (SSW1) - Body ground Always 10 kΩ or higher E78-2 (SS2) or E16-9 (SSW2) - Body ground Always 10 kΩ or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
OK: REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)