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:
Initialization
HINT:
The seatback position is initialized at the factory before
shipment, so initialization is not normally required.
There is an initialization function for cases when
reinitialization is required.
Before performing initialization procedure and initialization
release step ...
Removal
1. Remove rear wheel
2. Remove exhaust pipe assembly
Hint:
(see page ex-8)
3. Remove propeller with center bearing
shaft assembly
Hint:
(see page pr-3)
4. REMOVE REAR DIFFERENTIAL FILLER PLUG
(A) using a hexagon wrench (10 mm), remove the filler
plug and gasket.
5. Remove rear differentia ...
Oxygen Sensor Circuit
HINT:
Sensor 2 refers to the sensor mounted behind the Three-Way Catalytic
Converter (TWC) and located far
from the engine assembly.
DESCRIPTION
A three-way catalytic converter (TWC) is used in order to convert the carbon
monoxide (CO), hydro
carbon (HC), and nitrogen oxides (HOx) into ...
