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:
Manual shifting test
1. Perform manual shifting test
Hint:
With this test, it can be determined whether the
trouble occurs in the electrical circuit or is a
mechanical problem in the transaxle.
If any abnormalities are found in the following test, the
problem is in the transaxle itself.
(A) disconnec ...
Open in Front Passenger Side Squib Circuit
DTC B0106/54 Open in Front Passenger Side Squib Circuit
DESCRIPTION
The front passenger side squib circuit consists of the center airbag sensor
assembly and the front
passenger airbag assembly.
The circuit instructs the SRS to deploy when deployment conditions are met.
DTC B0106/54 is rec ...
DSP Error
DTC 44-78 DSP Error
DESCRIPTION
DTC No.
DTC Detection Condition
Trouble Area
44-78
An error occurs during the decode process (MP3 /
WMA).
-
INSPECTION PROCEDURE
HINT:
After the inspection is completed, clear the DTCs.
NOTICE:
Th ...
