Toyota Sienna Quiz
Theft deterrent

Ignition Switch Circuit

In this manual: Theft deterrent
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
9steps
~54min
2/5difficulty
Done 0 of 9

DESCRIPTION

When the ignition switch is turned to the ON position, battery positive voltage is applied to terminal IG of the ECU. When battery positive voltage is applied to terminal IG of the ECU while the theft deterrent system is operating, the warning stops.

WIRING DIAGRAM

WIRING DIAGRAM

INSPECTION PROCEDURE

1 INSPECT FUSES (ECU-IG, AM1)

  1. Remove the ECU-IG and AM1 fuses from the instrument panel J/B.
  2. Measure the resistance.
Standard resistance: Below 1 Ω

2 INSPECT RELAY (IG1)

INSPECT RELAY (IG1)
  1. Remove the IG1 relay from the instrument panel J/B.
  2. Check the operation of the IG1 relay.

Standard resistance

Standard resistance

3 INSPECT IGNITION OR STARTER SWITCH ASSEMBLY

INSPECT IGNITION OR STARTER SWITCH ASSEMBLY
  1. Disconnect the I15 switch connector.
  2. Measure the resistance according to the value(s) in the table below.

Standard resistance

Standard resistance

4 CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (POWER SOURCE)

CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (POWER SOURCE)
  1. Disconnect the 1A J/B connector.
  2. Turn the ignition switch ON.
  3. Measure the voltage according to the value(s) in the table below.

Standard voltage

Standard voltage

REPLACE INSTRUMENT PANEL J/B ASSEMBLY

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