RM36D0EC _58 Vehicle Interior _083094 THEFT DETERRENT / KEYLESS ENTRY _0712331 THEFT DETERRENT SYSTEM J

THEFT DETERRENT / KEYLESS ENTRY  THEFT DETERRENT SYSTEM  Security 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 security horn to sound at intervals of 0.4 seconds.

WIRING DIAGRAM

B591723E50
1.219,0.271 3.365,0.781 2.146,0.51 10 false from Auxiliary Battery 1.135,1.198 2.385,1.396 1.25,0.198 10 false S-HORN 2.885,1.948 4.135,2.146 1.25,0.198 10 false S-HORN 4.531,2.26 5.969,3.021 1.438,0.76 10 false Power Distribution Box Assembly 4.427,3.385 4.917,3.604 0.49,0.219 10 false A16 4.417,3.552 5.26,4.01 0.844,0.458 10 false Security Horn Assembly 5.51,3.229 6,3.448 0.49,0.219 10 false A 5.51,3.375 7.135,3.771 1.625,0.396 10 false Main Body ECU (Multiplex Network Body ECU) 4.531,2.094 5.021,2.313 0.49,0.219 10 false 6C 4.917,0.927 5.406,1.146 0.49,0.219 10 false 8 5.802,0.948 6.292,1.167 0.49,0.219 10 false 24 6.052,0.948 6.542,1.167 0.49,0.219 10 false SH 6.635,1.094 6.885,1.333 0.25,0.24 10 false IC 2.635,0.927 2.969,1.135 0.333,0.208 10 false 1 3.542,1.563 3.875,1.771 0.333,0.208 10 false 3 3.552,0.927 3.885,1.135 0.333,0.208 10 false 2 2.635,1.531 2.969,1.74 0.333,0.208 10 false 5 4.094,3.333 4.427,3.542 0.333,0.208 10 false 1

CAUTION / NOTICE / HINT

NOTICE:
·

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

·

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



PROCEDURE

1.PERFORM ACTIVE TEST USING GTS (SECURITY HORN)
a.

According to the display on the GTS, perform the Active Test.

Body Electrical > Main Body > Active Test
Tester Display Measurement Item Control Range Diagnostic Note
Security Horn Security horn assembly ON or OFF -
Body Electrical > Main Body > Active Test
Tester Display
Security Horn
50004 449 3
OK:

The security horn assembly sounds and stops correctly when operated through the GTS.



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

2.INSPECT SECURITY HORN ASSEMBLY
3.INSPECT SECURITY WARNING RELAY (S-HORN)
a.
E270109E01
1.948,1.302 2.135,1.302 false 2.698,1.302 2.885,1.302 false 2.542,1.021 2.865,1.021 false 2.552,0.76 2.875,0.76 false 0.458,0.719 0.615,0.917 0.156,0.198 10 false 5 1.271,0.719 1.427,0.917 0.156,0.198 10 false 3 1.271,1.281 1.427,1.479 0.156,0.198 10 false 2 0.458,1.281 0.615,1.479 0.156,0.198 10 false 1 2.927,0.677 3.083,0.875 0.156,0.198 10 false 3 2.917,0.938 3.073,1.135 0.156,0.198 10 false 5 2.948,1.229 3.104,1.427 0.156,0.198 10 false 1 1.813,1.24 1.969,1.438 0.156,0.198 10 false 2

Remove the security warning relay (S-HORN).


b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
Security warning relay (S-HORN) terminal 3 - Security warning relay (S-HORN) terminal 5 Auxiliary battery voltage is applied between security warning relay (S-HORN) terminals 2 - 1 Below 1 Ω
Security warning relay (S-HORN) terminal 3 - Security warning relay (S-HORN) terminal 5 Auxiliary battery voltage is not applied between security warning relay (S-HORN) terminals 2 - 1 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

4.CHECK HARNESS AND CONNECTOR (SECURITY WARNING RELAY [S-HORN] - MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU])

NG

REPLACE SECURITY WARNING RELAY (S-HORN RELAY)

4.CHECK HARNESS AND CONNECTOR (SECURITY WARNING RELAY [S-HORN] - MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU])
a.

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

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


b.

Connect the power distribution box assembly connectors.


c.

Remove the security warning relay (S-HORN).


d.

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

Standard Resistance:
Tester Connection Condition Specified Condition
Security warning relay (S-HORN) terminal 2 - A-24 (SHRN) Always Below 1 Ω
Security warning relay (S-HORN) terminal 2 or A-24 (SHRN) - Other terminals and body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

5.CHECK HARNESS AND CONNECTOR (BATTERY - SECURITY WARNING RELAY [S-HORN])

NG

7.CHECK HARNESS AND CONNECTOR (SECURITY WARNING RELAY [S-HORN] - POWER DISTRIBUTION BOX ASSEMBLY)
5.CHECK HARNESS AND CONNECTOR (BATTERY - SECURITY WARNING RELAY [S-HORN])
a.
B341518C06
0.188,0.125 0.5,0.281 0.313,0.156 10 false *a
*a Front view of wire harness connector
(to Security Warning Relay [S-HORN])


Remove the security warning relay (S-HORN).


b.

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

Standard Voltage:
Tester Connection Switch Condition Specified Condition
Security warning relay (S-HORN) terminal 1 - Body ground Ignition switch off 11 to 14 V
Security warning relay (S-HORN) terminal 5 - Body ground Ignition switch off 11 to 14 V



Result:
Proceed to
OK
NG



OK

6.CHECK HARNESS AND CONNECTOR (SECURITY WARNING RELAY [S-HORN] - SECURITY HORN ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.CHECK HARNESS AND CONNECTOR (SECURITY WARNING RELAY [S-HORN] - SECURITY HORN ASSEMBLY)
a.

Remove the security warning relay (S-HORN).


b.

Disconnect the A16 security horn assembly connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
Security warning relay (S-HORN) terminal 3 - A16-1 Always Below 1 Ω
Security warning relay (S-HORN) terminal 3 or A16-1 - Other terminals and body ground Always 10 kΩ or higher



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

REPAIR OR REPLACE HARNESS OR CONNECTOR

7.CHECK HARNESS AND CONNECTOR (SECURITY WARNING RELAY [S-HORN] - POWER DISTRIBUTION BOX ASSEMBLY)
a.

Disconnect the 6C power distribution box assembly connector.


b.

Remove the security warning relay (S-HORN).


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
Security warning relay (S-HORN) terminal 2 - 6C-8 Always Below 1 Ω
Security warning relay (S-HORN) terminal 2 or 6C-8 - Other terminals and body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

REPLACE POWER DISTRIBUTION BOX ASSEMBLY

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


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR