DESCRIPTION
When the theft deterrent system is switched from the armed state to the alarm sounding state, the main body ECU (driver side junction block assembly) transmits a signal to cause the horn to sound at intervals of 0.4 seconds.
WIRING DIAGRAM
PROCEDURE
1. |
INSPECT HORNS |
(a) Press the horn switch and check if the horns sound.
Result |
Proceed to |
---|---|
Horns sound |
A |
Horns do not sound |
B |
B | ![]() |
GO TO HORN SYSTEM |
|
2. |
PERFORM ACTIVE TEST USING TECHSTREAM |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Select the item below in the Active Test and then check that the horns operate.
Main Body
Tester Display |
Test Part |
Control Range |
Diagnostic Note |
---|---|---|---|
Vehicle Horn |
Vehicle horns |
ON / OFF |
- |
OK:
The vehicle horns sound and stop correctly when operated through the Techstream.
OK | ![]() |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
NG | ![]() |
REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY) |
Inspection
INSPECTION
PROCEDURE
1. INSPECT FRONT DOOR LOCK ASSEMBLY LH
(a) Check the operation of the door lock motor.
(1) Apply battery voltage and check the operation of the door lock motor.
OK:
Measurement Condition
...
Inspection
INSPECTION
PROCEDURE
1. INSPECT FRONT SEATBACK HEATER LH
(a) Apply battery voltage and check the seatback heater.
OK:
Measurement Connection
Condition
Specified Condition
...
System Diagram
SYSTEM DIAGRAM
1. MIRROR CONTROL SYSTEM
Communication Table
Sender
Receiver
Signal / Signal Condition
Line
Main body ECU (driver side junction block assembly)
Outer mirror control EC ...