Toyota Sienna Service Manual: 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 short of automatic light control sensor circuit occurs.
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 CHECK HARNESS AND CONNECTOR (MULTIPLEX NETWORK BODY ECU - AUTOMATIC LIGHT CONTROL SENSOR)
- Check for open or short circuit in the harness and the connector between the terminal 6 of the automatic light control sensor and the terminal B6-6 of the multiplex network body ECU.
- Check for open or short circuit in the harness and the connector between the terminal 3 of the automatic light control sensor and the terminal B6-4 of the multiplex network body ECU.
- Check for open or short circuit in the harness and the connector between the terminal 5 of the automatic light control sensor and the terminal B6-5 of the multiplex network body ECU
3 INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
- Measure voltage between the terminal B6-4 and the terminal B6-6 of the multiplex network body ECU in the instrument panel junction block assembly.
Voltage
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
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.
...
Door Courtesy Switch Circuit
DESCRIPTION
The Multiplex network body ECU detects the condition of the door courtesy
switch assembly.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 READ VALUE OF INTELLIGENT TESTER
Connect the ...
Other materials:
Vehicle interior
Items
Check points
Accelerator pedal
The accelerator pedal should move
smoothly (without uneven pedal effort or
catching).
Automatic transaxle “Park”
mechanism
When parked on a slope with the shift
lever in P, is ...
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 the voltage and resistance between each
terminal of the wire harness side connectors and
body gro ...
Network gateway ECU
COMPONENTS
REMOVAL
1. REMOVE FRONT DOOR SCUFF PLATE LH
2. REMOVE COWL SIDE TRIM BOARD LH
3. REMOVE INSTRUMENT PANEL FINISH PANEL
LOWER LH (See page IP-6)
4. REMOVE INSTRUMENT PANEL SAFETY PAD
INSERT NO. 1 (See page IP-6)
5. REMOVE CLEARANCE WARNING ECU ASSEMBLY
(See page PM-15)
6. REMOVE ...
