RM3660EC _58 Vehicle Interior _080747 THEFT DETERRENT / KEYLESS ENTRY _0588948 THEFT DETERRENT SYSTEM(except NR Series Engine) J

THEFT DETERRENT / KEYLESS ENTRY  THEFT DETERRENT SYSTEM(except 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 horn to sound at intervals of 0.4 seconds.

WIRING DIAGRAM

B660444E05
0.823,0.156 2.563,0.375 1.74,0.219 10 false from Auxiliary Battery 2.156,1.875 4.135,2.073 1.979,0.198 10 false HORN Relay 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 2.573,4.76 3.708,5.125 1.135,0.365 10 false Low Pitched Horn Assembly 4.198,4.75 5.344,5.125 1.146,0.375 10 false High Pitched Horn Assembly* 4.844,1.938 6.031,2.677 1.188,0.74 10 false Power Distribution Box Assembly 6.125,3.375 7.063,4.198 0.938,0.823 10 false Main Body ECU (Multiplex Network Body ECU) 2.021,0.844 2.24,1.042 0.219,0.198 10 false 1 2.948,1.458 3.167,1.656 0.219,0.198 10 false 5 2.938,0.833 3.156,1.031 0.219,0.198 10 false 2 2.052,1.438 2.271,1.635 0.219,0.198 10 false 3 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 A2 4.198,4.573 4.552,4.771 0.354,0.198 10 false A64 4.781,4.031 5.958,4.615 1.177,0.583 10 false to Steering Pad Switch Assembly 5.865,0.823 6.219,1.021 0.354,0.198 10 false 23 6.135,3.208 6.49,3.406 0.354,0.198 10 false MB 6.74,1.021 7.094,1.219 0.354,0.198 10 false IC 4.646,0.729 4.854,0.938 0.208,0.208 10 false 10 4.615,0.938 4.99,1.177 0.375,0.24 10 false 10A 4.615,1.344 5,1.625 0.385,0.281 10 false 10F 4.656,1.146 4.844,1.333 0.188,0.188 10 false 31 0.083,5.375 2.219,5.583 2.135,0.208 10 false *: w/ High Pitched Horn Assembly

CAUTION / NOTICE / HINT

NOTICE:
·

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

·

If the main body ECU (multiplex network body ECU) is replaced, refer to the Service Bulletin.



PROCEDURE

1.CHECK HORNS OPERATION
a.

Press the horn switch and check if the horns sound.


Result:
Proceed to
Horns sound
Horns do not sound



Horns sound

2.INSPECT POWER DISTRIBUTION BOX ASSEMBLY

Horns do not sound

GO TO HORN SYSTEM

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


2.INSPECT POWER DISTRIBUTION BOX ASSEMBLY
a.

Remove the power distribution box assembly.

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

B668740C03
1.656,1.427 2.073,1.677 0.417,0.25 5.031,1.042 5.448,1.292 0.417,0.25 1.646,0.094 2.042,0.344 0.396,0.25 6.208,1.635 6.208,1.958 6.208,1.958 5.906,1.958 true 0.115,0.063 0.427,0.219 0.313,0.156 10 false *a 1.76,1.479 2.073,1.677 0.313,0.198 10 false 10A 5.146,1.094 5.458,1.292 0.313,0.198 10 false MB 5.49,1.875 6.052,2.094 0.563,0.219 10 false HORN 1.75,0.146 2.063,0.344 0.313,0.198 10 false 10F
*a Component without harness connected
(Power Distribution Box Assembly) 		- -



b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
10A-10 - MB-23 (HORN) Always Below 1 Ω
10F-31 - MB-23 (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 POWER DISTRIBUTION BOX ASSEMBLY

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