Toyota Sienna Quiz
Lighting

Illumination Circuit

In this manual: Lighting
Introduction — 55Service specifications — 7Maintenance — 7Engine — 264U151e automatic transaxle — 108Transfer — 19Propeller shaft — 8Drive shaft — 14Differential — 16Axle — 18Suspension — 37Tire and wheel — 54Brake control — 141Parking brake — 16Steering Column — 11Power steering — 18Air conditioning — 106Supplemental restraint system — 146Seat belt — 22Theft deterrent — 14Engine immobiliser — 17Cruise control — 65Lighting — 61Wiper and washer — 13Door lock — 42Meter — 28Audio / visual — 94Navigation — 108Park assist / monitoring — 33Horn — 5Garage door opener — 42GR-FE Engine control system — 126Supplemental restraint system — 147Other system — 14Windshield / windowglass — 43Mirror — 23Instrument panel — 6Seat belt — 22Seat — 92Engine hood / door — 104Exterior — 39Interior — 5Sliding roof — 9Multiplex communication — 18Can communication — 23
6steps
~36min
2/5difficulty
Done 0 of 6

DESCRIPTION

The Multiplex network body ECU controls illumination light as shown in the chart below.

  1. Room light assembly (Interior light, luggage component light) and courtesy light with DOOR position
  2. Map light assembly (Personal light)
  3. Transponder key amplifier (Ignition key cylinder light)

WIRING DIAGRAM

WIRING DIAGRAM
WIRING DIAGRAM

INSPECTION PROCEDURE

1 PERFORM ACTIVE TEST BY 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 item below in the ACTIVE TEST and then check that the relay operates

DATA LIST / AIR CONDITIONER

2 INSPECT LIGHT CONTROL RELAY

INSPECT LIGHT CONTROL RELAY
  1. Check that there is resistance between the terminals at each switch position as shown in the chart.

Resistance

Resistance

3 INSPECT INTERIOR DOME LIGHT SWITCH ASSEMBLY

INSPECT INTERIOR DOME LIGHT SWITCH ASSEMBLY
  1. Inspect interior dome light relay continuity.

Resistance

Resistance

4 INSPECT INTERIOR LIGHT

  1. Inspect the each of interior light

5 INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

  1. Measure voltage between each of the terminals as shown in the chart below
INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

Voltage

Voltage
Voltage

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

Test yourself

A quick Toyota Sienna quiz: every answer comes with an explanation and a link to the manual page.