DESCRIPTION
When the theft deterrent system is switched from the armed state to the alarm sounding state, the main body ECU (multiplex network body ECU) transmits a signal to cause the horns to sound at intervals of 0.4 seconds.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
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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. | INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY |
(a) Remove the main body ECU (multiplex network body ECU).
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*a | Component without harness connected (Instrument Panel Junction Block Assembly) | - | - |
(b) Disconnect the 2C instrument panel junction block assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
2C-27 - MB-28 (HORN) | Always | Below 1 Ω |
OK | ![]() | REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
NG | ![]() | REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY |
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