Toyota Sienna Service Manual: Light Control Switch Circuit
DESCRIPTION
This circuit detects the state of the headlight dimmer switch.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 READ VALUE OF INTELLIGENT TESTER
- Connect the intelligent tester to DLC3.
- Turn the ignition switch ON and push the intelligent tester main switch ON.
- Select the items below in the DATA LIST, and read the displays on the intelligent tester
BODY NO.1:
2 INSPECT HEADLIGHT DIMMER SWITCH ASSEMBLY
- Inspect headlight dimmer switch assembly
3 INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
- Remove the instrument panel junction block assembly.
- Measure voltage between the each of terminals as shown in the chart below.
Voltage
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
Front Fog Light Circuit
DESCRIPTION
The Multiplex network body ECU controls FOG relay when signal is received
from headlight dimmer
switch assembly.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 PERFORM ACTIVE TEST BY INT ...
Automatic Light Control Sensor Circuit
DESCRIPTION
The Multiplex network body ECU receives the signal from the automatic light
control sensor.
HINT:
DTC code is output when malfunction of automatic light control sensor or open or
...
Other materials:
Oxygen (A/F) Sensor Pumping Current Circuit
DTC P2238 Oxygen (A/F) Sensor Pumping Current Circuit
Low (Bank 1 Sensor 1)
DTC P2239 Oxygen (A/F) Sensor Pumping Current Circuit
High (Bank 1 Sensor 1)
DTC P2241 Oxygen (A/F) Sensor Pumping Current Circuit
Low (Bank 2 Sensor 1)
DTC P2242 Oxygen (A/F) Sensor Pumping Current Circuit
High (Bank ...
VSC Warning Light Remains ON
DESCRIPTION
The skid control ECU is connected to the combination meter via CAN and
multiplex communications.
If the skid control ECU stores DTCs to shut down TRAC and VSC operation, the VSC
warning light comes
on in the combination meter.
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTICE:
...
Power window master
switch
Inspection
1. INSPECT POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY (w/ Jam
Protection Function)
Check the resistance between the terminals of the
switch when the switch is operated.
Standard:
AUTO (driver side) switch
Passenger side switch
Rear LH switch
Rear RH switch
...
