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:
Sound Signal Circuit between Radio Receiver and Television Display
Assembly
DESCRIPTION
The television display assembly sends a sound signal to the radio receiver
through this circuit.
The sound signal that has been sent is amplified by the stereo component
amplifier or radio receiver
(built-in amplifier), and then is sent to the speakers.
If there is an open or ...
Power back door drive unit
INSPECTION
1. INSPECT POWER BACK DOOR DRIVE UNIT
Remove the unit.
Apply battery voltage to the terminals and check the
motor operation.
Standard
If the result is not as specified, replace the drive
unit.
Check the resistance of the clutch terminals.
Resistance
If th ...
How to proceed with
troubleshooting
HINT:
Use the following procedures to troubleshoot the dynamic
laser cruise control system.
*: Use the intelligent tester
1 VEHICLE BROUGHT TO WORKSHOP
2 CUSTOMER PROBLEM ANALYSIS
3 PROBLEM SYMPTOM CONFIRMATION
Result
SYMPTOM SIMULATION
4 INSPECT BATTERY VOLTAGE
Stan ...
