RM3660EC _58 Vehicle Interior _080747 THEFT DETERRENT / KEYLESS ENTRY _0586355 THEFT DETERRENT SYSTEM(for NR Series Engine) J

THEFT DETERRENT / KEYLESS ENTRY  THEFT DETERRENT SYSTEM(for NR Series Engine)  Horn Circuit  


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

B424476E51
0.823,0.156 2.656,0.354 1.833,0.198 10 false from Battery 2.333,1.865 2.948,2.063 0.615,0.198 10 false HORN 1.104,1.094 1.719,1.292 0.615,0.198 10 false HORN 6.115,0.844 6.729,1.042 0.615,0.198 10 false HORN 1.042,2.26 3.281,2.76 2.24,0.5 10 false No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly 2.573,4.76 3.719,5.198 1.146,0.438 10 false High Pitched Horn Assembly 4.198,4.75 5.302,5.135 1.104,0.385 10 false Low Pitched Horn Assembly 4.438,1.917 6.073,2.354 1.635,0.438 10 false Driver Side Junction Block Assembly 5.375,3.396 7.052,3.927 1.677,0.531 10 false Main Body ECU (Multiplex Network Body ECU) 2.021,0.844 2.24,1.042 0.219,0.198 10 false 1 2.938,0.833 3.156,1.031 0.219,0.198 10 false 2 2.26,4.5 2.479,4.698 0.219,0.198 10 false 1 3.875,4.521 4.094,4.719 0.219,0.198 10 false 1 2.594,4.583 2.948,4.781 0.354,0.198 10 false A64 4.198,4.573 4.552,4.771 0.354,0.198 10 false A2 4.792,4.031 7.104,4.25 2.313,0.219 10 false to Steering Pad Switch Assembly 5.865,0.823 6.219,1.021 0.354,0.198 10 false 28 5.365,3.208 5.719,3.406 0.354,0.198 10 false MB 6.74,1.021 7.094,1.219 0.354,0.198 10 false IC 4.635,0.729 4.99,0.927 0.354,0.198 10 false 27 4.625,0.948 4.979,1.146 0.354,0.198 10 false 4B 4.625,1.24 4.979,1.438 0.354,0.198 10 false 50 4.615,1.448 4.969,1.646 0.354,0.198 10 false 4E 2.042,1.448 2.26,1.646 0.219,0.198 10 false 3 2.948,1.427 3.167,1.625 0.219,0.198 10 false 5

CAUTION / NOTICE / HINT

NOTICE:
·

Before replacing the main body ECU (multiplex network body ECU), refer to Service Bulletin.

·

Inspect the fuses for circuits related to this system before performing the following procedure.



PROCEDURE

1.INSPECT HORNS
a.

Press the horn switch and check if the horns sound.

Result:
Result Proceed to
Horns sound A
Horns do not sound B




A

2.INSPECT DRIVER SIDE JUNCTION BLOCK ASSEMBLY

B

GO TO HORN SYSTEM

Click hereVehicle Exterior>HORN>HORN SYSTEM>PROBLEM SYMPTOMS TABLE


2.INSPECT DRIVER SIDE JUNCTION BLOCK ASSEMBLY
a.

Remove the main body ECU (multiplex network body ECU).

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU>REMOVAL

B424477C16
1.333,0.25 1.75,0.5 0.417,0.25 4.813,0.5 5.229,0.75 0.417,0.25 6.271,1.083 6.271,1.406 6.271,1.406 5.833,1.406 true 0.115,0.063 0.427,0.219 0.313,0.156 10 false *a 1.448,0.292 1.76,0.49 0.313,0.198 10 false 4B 4.927,0.531 5.24,0.729 0.313,0.198 10 false MB 5.427,1.323 5.99,1.542 0.563,0.219 10 false HORN
*a Component without harness connected
(Driver Side Junction Block Assembly) 		- -



b.

Disconnect the 4B driver side junction block assembly connector.


c.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
4B-27 - MB-28 (HORN) Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU>REMOVAL


NG

REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU>REMOVAL