Toyota RAV4 manuals

Toyota Sienna Service Manual: Security Horn Circuit

DESCRIPTION

During the alarm sounding state, the relay in the ECU turns on and off in a cycle of approximately 0.2 seconds, causing the security horn to sound.

WIRING DIAGRAM

WIRING DIAGRAM

INSPECTION PROCEDURE

1 INSPECT SECURITY HORN ASSEMBLY

INSPECT SECURITY HORN ASSEMBLY

  1. Disconnect the T1 security horn connector.
  2.  Check the operation of the security horn.

Standard

Standard

2 CHECK HARNESS AND CONNECTOR (MULTIPLEX NETWORK BODY ECU - SECURITY HORN ASSEMBLY)

 CHECK HARNESS AND CONNECTOR (MULTIPLEX NETWORK BODY ECU - SECURITY HORN ASSEMBLY)

  1. Disconnect the B8 ECU connector.
  2.  Measure the resistance according to the value(s) in the table below.

Standard resistance

Standard resistance

REPLACE MULTIPLEX NETWORK BODY ECU

Engine Hood Courtesy Switch Circuit
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Ignition Switch Circuit
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 ...

Other materials:

Repair
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For rear air conditioning system
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Rear blower resistor
ON-VEHICLE INSPECTION 1. INSPECT REAR BLOWER MOTOR CONTROLLER (a) Measure resistance according to the value(s) in the table below.. Standard resistance If the resistance is not as specified, replace the rear blower motor controller. (b) Inspect the rear blower motor controller. (1 ...

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