Toyota Sienna Service Manual: Engine Hood Courtesy Switch Circuit
DESCRIPTION
The engine hood courtesy switch is built in the engine hood lock assembly. The switch turns on when the engine hood is opened and turns off when the engine hood is closed.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 INSPECT ENGINE HOOD COURTESY SWITCH
- Remove the courtesy switch.
- Disconnect the E3 switch connector.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
2 CHECK HARNESS AND CONNECTOR (MULTIPLEX NETWORK BODY ECU - ENGINE HOOD COURTESY SWITCH)
- Disconnect the B8 ECU connector.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
3 CHECK HARNESS AND CONNECTOR (ENGINE HOOD COURTESY SWITCH - BODY GROUND)
- Measure the resistance according to the value(s) in the table below.
Standard resistance
REPLACE MULTIPLEX NETWORK BODY ECU
Terminals of ECU
1. CHECK INSTRUMENT PANEL J/B ASSEMBLY
(MULTIPLEX NETWORK BODY ECU)
Disconnect the B6, B7 and B9 ECU connectors.
Disconnect the 1A, 1C, 1L and 1K J/B connectors.
Measure t ...
Security Horn Circuit
DESCRIPTION
During the alarm sounding state, the relay in the ECU turns on and off in a
cycle of approximately 0.2
seconds, causing the security horn to sound.
WIRING DIAGRAM
INSPECTION PROC ...
Other materials:
ECM Power Source Circuit
DESCRIPTION
When the ignition switch is turned to the ON position, the battery voltage is
applied to terminal IGSW of
the ECM. The ECM MREL output signal causes a current to flow to the coil,
closing the contacts of the EFI
relay and supplying power to terminal +B of the ECM.
If the igniti ...
Disposal
1. DISPOSE OF FRONT SEAT OUTER BELT ASSEMBLY
(WHEN INSTALLED IN VEHICLE)
NOTICE:
Never dispose of a front seat outer belt assembly
with an deactivated pretensioner.
The seat belt pretensioner produces an exploding
sound when it activates, so perform the operation
outdoors w ...
Removal
1. REMOVE FRONT DOOR OPENING TRIM
WEATHERSTRIP LH
2. REMOVE FRONT DOOR OPENING TRIM
WEATHERSTRIP RH
3. REMOVE FRONT PILLAR GARNISH LH
4. REMOVE FRONT PILLAR GARNISH RH
5. REMOVE VISOR ASSEMBLY LH
6. REMOVE VISOR ASSEMBLY RH
7. REMOVE ASSIST GRIP SUB-ASSEMBLY (2)
8. REMOVE VISOR HOLDER (1)
...
