Toyota Sienna Service Manual: Illumination Circuit
DESCRIPTION
The Multiplex network body ECU controls illumination light as shown in the chart below.
- Room light assembly (Interior light, luggage component light) and courtesy light with DOOR position
- Map light assembly (Personal light)
- Transponder key amplifier (Ignition key cylinder light)
WIRING DIAGRAM
INSPECTION PROCEDURE
1 PERFORM ACTIVE TEST BY INTELLIGENT TESTER
- Connect the intelligent tester to DLC3.
- Turn the ignition switch ON and push the intelligent tester main switch ON.
- Select the item below in the ACTIVE TEST and then check that the relay operates
DATA LIST / AIR CONDITIONER
2 INSPECT LIGHT CONTROL RELAY
- Check that there is resistance between the terminals at each switch position as shown in the chart.
Resistance
3 INSPECT INTERIOR DOME LIGHT SWITCH ASSEMBLY
- Inspect interior dome light relay continuity.
Resistance
4 INSPECT INTERIOR LIGHT
- Inspect the each of interior light
5 INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
- Measure voltage between each of the terminals as shown in the chart below
Voltage
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
Door LOCK Position Circuit
DESCRIPTION
This circuit detects the state of the door lock detection sensor and send it
to the Multiplex network body
ECU.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 READ VALUE OF INTELLIGENT T ...
Parking Brake Switch Circuit
DESCRIPTION
The Multiplex network body ECU receives parking brake switch signal.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 READ VALUE OF INTELLIGENT TESTER
Connect the intelligent tester to DL ...
Other materials:
Installation
1. INSTALL FUEL INJECTOR ASSEMBLY
(a) Apply a light coat of spindle oil or gasoline to new Orings,
and install them to each injector.
(b) Apply a light coat of spindle oil or gasoline where
the fuel delivery pipe contacts the O-ring.
(c) Push the fuel injector while turning it to inst ...
Installation
1. INSTALL FRONT STABILIZER BAR
2. INSTALL NO. 1 FRONT STABILIZER BAR BUSHING
(a) Install the 2 front stabilizer bar bush No.1 to the
stabilizer bar front.
NOTICE:
Install the bushings with the slit facing on the
rear side of the vehicle.
HINT:
Install the bushing to the outer side of th ...
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 PROCEDURE
1 INSPECT SECURITY HORN ASSEMBLY
Disconnect the T1 security horn connector.
C ...