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

1. Connect the intelligent tester to DLC3.
2.  Turn the ignition switch ON and push the intelligent tester main switch ON.
3.  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)

1. 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.
2.  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.
3.  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

1. 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