Inspection Procedure
WARNING: This page is about a different car, the 2008 Toyota Tundra. However, it is still accessible from the selected car via links, so may be relevant.
- READ VALUE USING TECHSTREAM (IGNITION SWITCH SIGNAL)
- Use the Data List to check if the ignition switch signal is functioning properly (see DATA LIST / ACTIVE TEST
).
Sliding Roof
TECHSTREAM SLIDING ROOF - DATA LISTTester Display Test Part Control Range Diagnostic Note Ignition (MPX) Ignition switch signal (MPX signal)/ON or OFF ON: Ignition switch ON
OFF: Ignition switch OFF- Ignition (Direct Signal) Ignition switch signal/ON or OFF ON: Ignition switch ON
OFF: Ignition switch OFF- OK: The Techstream displays as shown in the table according to the operation of each switch.
NG: Go to step 2
OK: REPLACE SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY (SLIDING ROOF ECU) (see DISASSEMBLY )
- Use the Data List to check if the ignition switch signal is functioning properly (see DATA LIST / ACTIVE TEST
).
- INSPECT FUSE (S/ROOF, ECU-IG No. 1)
- Remove the S/ROOF and ECU-IG No. 1 fuses from the main body ECU.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
INSPECT FUSE (S/ROOF, ECU-IG No. 1) RESISTANCE SPECIFICATIONTester Connection Condition Specified Condition S/ROOF fuse Always Below 1 Ω ECU-IG No. 1 fuse Always Below 1 Ω
NG: REPLACE FUSE
OK: Go to Next Step
- CHECK HARNESS AND CONNECTOR (SLIDING ROOF ECU - BATTERY AND BODY GROUND)
- Disconnect the W3 ECU connector.
- Measure the voltage according to the value(s) in the table below.
Standard voltage
HARNESS AND CONNECTOR (SLIDING ROOF ECU - BATTERY AND BODY GROUND) VOLTAGE SPECIFICATIONTester Connection Switch Condition Specified Condition W3-9 (IG) - Body ground Ignition switch ON 11 to 14 V W3-9 (IG) - Body ground Ignition switch OFF Below 1 V W3-10(B) - Body ground Always 11 to 14 V - Measure the resistance according to the value(s) in the table below.
Standard resistance
HARNESS AND CONNECTOR (SLIDING ROOF ECU - BATTERY AND BODY GROUND) RESISTANCE SPECIFICATIONTester Connection Condition Specified Condition W3-8 (E) - Body ground Always Below 1 Ω
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: REPLACE SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY (SLIDING ROOF ECU) (see DISASSEMBLY )