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
INSPECTION PROCEDURE
1 INSPECT SECURITY HORN ASSEMBLY
- Disconnect the T1 security horn connector.
- Check the operation of the security horn.
Standard
2 CHECK HARNESS AND CONNECTOR (MULTIPLEX NETWORK BODY ECU - SECURITY HORN ASSEMBLY)
- Disconnect the B8 ECU connector.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
REPLACE MULTIPLEX NETWORK BODY ECU
Engine Hood Courtesy Switch Circuit
DESCRIPTION
The engine hood courtesy switch is built in the engine hood lock assembly.
The switch turns on when the
engine hood is opened and turns off when the engine hood is closed.
WIRING DIAG ...
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:
Check and replace ecu
NOTICE: • The connector should not be disconnected from
the ECU. Perform the inspection from the
backside of the connector on the wire harness
side.
• When no measuring condition is specified,
perform the inspection with the engine stopped
and the ignition switch on.
• Che ...
Power Slide Door Pulse Sensor Malfunction on
Rear Left Door
DTC B2224 Power Slide Door Pulse Sensor Malfunction on
Rear Left Door
DESCRIPTION
A pulse sensor is built into slide door LH for jam and foreign
object detection and for slide door position
detection. The jam and foreign object detection feature of the pulse sensor
monitors the o ...
Precaution
1. NOTES FOR CLEARANCE SONAR SYSTEM
Under the following conditions, the sensor of the
clearance sonar may not operate properly:
Foreign matter such as snow or mud gets on the
sensor (the detection function will return to
normal when the foreign matter is no longer
prese ...
