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)  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 assembly to sound at intervals of 0.4 seconds.

WIRING DIAGRAM

B492645E25
0.792,0.135 2.938,0.333 2.146,0.198 10 false from Battery 0.438,1.073 1.688,1.271 1.25,0.198 10 false S-HORN 2.219,1.865 3.469,2.063 1.25,0.198 10 false S-HORN 1.604,2.26 4.229,2.563 2.625,0.302 10 false No. 3 Relay Block Assembly 4.354,1.625 5.99,2.406 1.635,0.781 10 false Driver Side Junction Block Assembly 4.146,3.74 4.635,3.958 0.49,0.219 10 false A16 4.146,3.896 6.25,4.219 2.104,0.323 10 false Security Horn Assembly 5.979,3.188 6.469,3.406 0.49,0.219 10 false MB 5.979,3.354 6.99,4.208 1.01,0.854 10 false Main Body ECU (Multiplex Network Body ECU) 4.354,1.469 4.844,1.688 0.49,0.219 10 false 4B 4.656,0.833 5.146,1.052 0.49,0.219 10 false 26 5.802,0.823 6.292,1.042 0.49,0.219 10 false 29 6.031,0.823 6.521,1.042 0.49,0.219 10 false SH 6.615,1.094 6.865,1.333 0.25,0.24 10 false IC 1.969,0.823 2.302,1.031 0.333,0.208 10 false 1 1.979,1.438 2.313,1.646 0.333,0.208 10 false 5 2.875,0.802 3.208,1.01 0.333,0.208 10 false 2 2.875,1.438 3.208,1.646 0.333,0.208 10 false 3 3.792,3.615 4.125,3.823 0.333,0.208 10 false 1

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

Connect the GTS to the DLC3.


b.

Turn the engine switch on (IG).


c.

Turn the GTS on.


d.

Enter the following menus: Body Electrical / Main Body / Active Test.


e.

Perform the Active Test according to the display on the GTS.

Body Electrical > Main Body > Active Test
Tester Display Measurement Item Control Range Diagnostic Note
Security Horn Security horn Assembly OFF/ON -
Body Electrical > Main Body > Active Test
Tester Display
Security Horn
50004 123 20
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 S-HORN RELAY
a.
B256934C02
2.198,0.917 2.198,0.5 2.198,0.5 2.031,0.5 true 2.031,1.885 2.198,1.885 2.198,1.885 2.198,1.469 true 2.646,1.885 2.479,1.885 2.479,1.885 2.479,1.365 true 2.823,1 2.823,0.5 2.823,0.5 2.656,0.5 true 0.104,0.083 0.417,0.396 0.313,0.313 10 false *1 0.323,1.458 0.573,1.75 0.25,0.292 10 false 5 1.313,0.667 1.594,0.917 0.281,0.25 10 false 2 0.313,0.667 0.51,0.906 0.198,0.24 10 false 1 1.313,1.469 1.563,1.708 0.25,0.24 10 false 3 2.708,1.792 2.927,2.01 0.219,0.219 10 false 5 1.833,1.771 2.063,2 0.229,0.229 10 false 1 1.917,0.417 2.208,0.688 0.292,0.271 10 false 2 2.542,0.417 2.813,0.708 0.271,0.292 10 false 3
*1 S-HORN Relay


Remove the S-HORN relay from the No. 3 relay block assembly.


b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
3 - 5 Battery voltage not applied between terminals 1 and 2 10 kΩ or higher
3 - 5 Battery voltage applied between terminals 1 and 2 Below 1 Ω



Result:
Proceed to
OK
NG



OK

4.INSPECT DRIVER SIDE JUNCTION BLOCK ASSEMBLY

NG

REPLACE S-HORN RELAY

4.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

B424477C17
1.333,0.25 1.75,0.5 0.417,0.25 4.833,0.5 5.25,0.75 0.417,0.25 6.375,1.083 6.375,1.406 6.375,1.406 5.938,1.406 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 4.938,0.542 5.25,0.74 0.313,0.198 10 false MB 5.688,1.323 6.25,1.542 0.563,0.219 10 false SH
*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-26 - MB-29 (SH) Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

5.CHECK HARNESS AND CONNECTOR (BATTERY - S-HORN RELAY)

NG

REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY

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


5.CHECK HARNESS AND CONNECTOR (BATTERY - S-HORN RELAY)
a.
B340809C03
0.146,0.125 0.458,0.281 0.313,0.156 10 false *1
*1 No. 3 Relay Block Assembly


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

Standard Voltage:
Tester Connection Condition Specified Condition
No. 3 relay block assembly S-HORN relay terminal 1 - Body ground Always 11 to 14 V
No. 3 relay block assembly S-HORN relay terminal 5 - Body ground Always 11 to 14 V



Result:
Proceed to
OK
NG



OK

6.CHECK HARNESS AND CONNECTOR (S-HORN RELAY - SECURITY HORN ASSEMBLY AND BODY GROUND)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.CHECK HARNESS AND CONNECTOR (S-HORN RELAY - SECURITY HORN ASSEMBLY AND BODY GROUND)
a.
B340809C03
0.146,0.125 0.458,0.281 0.313,0.156 10 false *1
*1 No. 3 Relay Block Assembly


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

Standard Resistance:
Tester Connection Condition Specified Condition
No. 3 relay block assembly S-HORN relay terminal 3 - A16-1 Always Below 1 Ω
No. 3 relay block assembly S-HORN relay terminal 3 or A16-1 - Other terminals and body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

7.CHECK HARNESS AND CONNECTOR (S-HORN RELAY - DRIVER SIDE JUNCTION BLOCK ASSEMBLY AND BODY GROUND)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

7.CHECK HARNESS AND CONNECTOR (S-HORN RELAY - DRIVER SIDE JUNCTION BLOCK ASSEMBLY AND BODY GROUND)
a.
B340809C03
0.146,0.125 0.458,0.281 0.313,0.156 10 false *1
*1 No. 3 Relay Block Assembly


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

Standard Resistance:
Tester Connection Condition Specified Condition
No. 3 relay block assembly S-HORN relay terminal 2 - 4B-26 Always Below 1 Ω
No. 3 relay block assembly S-HORN relay terminal 2 or 4B-26 - 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