☰ Toyota Frontlander☰ فهرستVehicle Interior › THEFT DETERRENT / KEYLESS ENTRY › THEFT DETERRENT SYSTEM
RM38T0EC
_58
Vehicle Interior
_115230
THEFT DETERRENT / KEYLESS ENTRY
_0512196
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 assembly to sound at intervals of 0.4 seconds.
WIRING DIAGRAM
Production Date from 2022/01 to 2023/04
1.219,0.271 3.365,0.469
2.146,0.198
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
4.417,3.385 4.906,3.604
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
MB
5.51,3.375 7.135,3.771
1.625,0.396
10
false
Main Body ECU (Multiplex Network Body ECU)
4.521,2.094 5.01,2.313
0.49,0.219
10
false
8E
4.917,0.927 5.406,1.146
0.49,0.219
10
false
4
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
2.646,0.948 2.979,1.156
0.333,0.208
10
false
1
2.667,1.563 3.042,2
0.375,0.438
10
false
3
3.531,0.948 3.865,1.156
0.333,0.208
10
false
2
3.542,1.563 3.885,1.948
0.344,0.385
10
false
5
4.094,3.333 4.427,3.542
0.333,0.208
10
false
1
Production Date from 2023/04
1.219,0.271 3.365,0.469
2.146,0.198
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
4.417,3.385 4.906,3.604
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
MB
5.51,3.375 7.135,3.771
1.625,0.396
10
false
Main Body ECU (Multiplex Network Body ECU)
4.521,2.094 5.01,2.313
0.49,0.219
10
false
8E
4.917,0.927 5.406,1.146
0.49,0.219
10
false
4
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
2.646,0.948 2.979,1.156
0.333,0.208
10
false
1
2.677,1.552 3.052,1.99
0.375,0.438
10
false
5
3.531,0.948 3.865,1.156
0.333,0.208
10
false
2
3.542,1.552 3.885,1.938
0.344,0.385
10
false
3
4.094,3.333 4.427,3.542
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.CONFIRM MODEL
a.
Choose the model to be inspected.
- Result:
Result Proceed to Production date from 2022/01 to 2023/04 A Production date from 2023/04 B
A
2.PERFORM ACTIVE TEST USING GTS
B
9.PERFORM ACTIVE TEST USING GTS
2.PERFORM ACTIVE TEST USING GTS
a.
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 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)
NG
3.INSPECT SECURITY HORN ASSEMBLY
3.INSPECT SECURITY HORN ASSEMBLY
- Result:
Proceed to OK NG
OK
4.INSPECT S-HORN RELAY
NG
REPLACE SECURITY HORN ASSEMBLY
4.INSPECT S-HORN RELAY
a.
2.188,1.469 2.188,1.802
true
2.833,1.042 3.167,1.042
true
2.479,1.354 2.479,1.823
true
1.698,0.927 2.031,0.927
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
2.469,1.833 2.688,2.052
0.219,0.219
10
false
5
2.146,1.833 2.375,2.063
0.229,0.229
10
false
1
1.583,0.844 1.875,1.115
0.292,0.271
10
false
2
3.188,0.958 3.333,1.188
0.146,0.229
10
false
3
| *1 | S-HORN Relay |
Remove the S-HORN relay from the No. 1 engine room relay block.
b.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition 3 - 5 Auxiliary battery voltage not applied between terminals 1 and 2 10 kΩ or higher 3 - 5 Auxiliary battery voltage applied between terminals 1 and 2 Below 1 Ω
- Result:
Proceed to OK NG
OK
5.INSPECT POWER DISTRIBUTION BOX ASSEMBLY
NG
REPLACE S-HORN RELAY
5.INSPECT POWER DISTRIBUTION BOX ASSEMBLY
a.
Remove the main body ECU (multiplex network body ECU).
1.354,0.25 1.771,0.5
0.417,0.25
4.813,0.5 5.229,0.75
0.417,0.25
5.719,1.375 5.99,1.094
true
0.115,0.063 0.427,0.219
0.313,0.156
10
false
*a
1.469,0.292 1.781,0.49
0.313,0.198
10
false
8E
4.927,0.531 5.24,0.729
0.313,0.198
10
false
MB
5.5,1.365 6.063,1.583
0.563,0.219
10
false
SH
| *a | Component without harness connected
(Power Distribution Box Assembly) |
- | - |
b.
Disconnect the 8E power distribution box assembly connector.
c.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition 8E-4 - MB-24 (SH) Always Below 1 Ω
- Result:
Proceed to OK NG
OK
6.CHECK HARNESS AND CONNECTOR (AUXILIARY BATTERY - S-HORN RELAY)
NG
REPLACE POWER DISTRIBUTION BOX ASSEMBLY
6.CHECK HARNESS AND CONNECTOR (AUXILIARY BATTERY - S-HORN RELAY)
a.
0.146,0.125 0.458,0.281
0.313,0.156
10
false
*1
| *1 | No. 1 Engine Room Relay Block |
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Switch Condition Specified Condition S-HORN relay holder terminal 1 - Body ground Ignition switch off 11 to 14 V S-HORN relay holder terminal 3 - Body ground*1 Ignition switch off 11 to 14 V
- Result:
Proceed to OK NG
OK
7.CHECK HARNESS AND CONNECTOR (S-HORN RELAY - SECURITY HORN ASSEMBLY)
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
7.CHECK HARNESS AND CONNECTOR (S-HORN RELAY - SECURITY HORN ASSEMBLY)
a.
0.146,0.125 0.458,0.281
0.313,0.156
10
false
*1
| *1 | No. 1 Engine Room Relay Block |
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition S-HORN relay holder terminal 5 - A16-1 Always Below 1 Ω S-HORN relay holder terminal 5 or A16-1 - Other terminals and body ground Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
8.CHECK HARNESS AND CONNECTOR (S-HORN RELAY - POWER DISTRIBUTION BOX ASSEMBLY)
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
8.CHECK HARNESS AND CONNECTOR (S-HORN RELAY - POWER DISTRIBUTION BOX ASSEMBLY)
a.
0.146,0.125 0.458,0.281
0.313,0.156
10
false
*1
| *1 | No. 1 Engine Room Relay Block |
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition S-HORN relay holder terminal 2 - 8E-4 Always Below 1 Ω S-HORN relay holder terminal 2 or 8E-4 - Other terminals and body ground Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
9.PERFORM ACTIVE TEST USING GTS
a.
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 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)
NG
10.INSPECT SECURITY HORN ASSEMBLY
10.INSPECT SECURITY HORN ASSEMBLY
- Result:
Proceed to OK NG
OK
11.INSPECT S-HORN RELAY
NG
REPLACE SECURITY HORN ASSEMBLY
11.INSPECT S-HORN RELAY
a.
2.188,1.469 2.188,1.802
true
2.833,1.042 3.167,1.042
true
2.479,1.354 2.479,1.823
true
1.698,0.927 2.031,0.927
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
2.469,1.833 2.688,2.052
0.219,0.219
10
false
5
2.146,1.833 2.375,2.063
0.229,0.229
10
false
1
1.583,0.844 1.875,1.115
0.292,0.271
10
false
2
3.188,0.958 3.333,1.188
0.146,0.229
10
false
3
| *1 | S-HORN Relay |
Remove the S-HORN relay from the No. 1 engine room relay block.
b.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition 3 - 5 Auxiliary battery voltage not applied between terminals 1 and 2 10 kΩ or higher 3 - 5 Auxiliary battery voltage applied between terminals 1 and 2 Below 1 Ω
- Result:
Proceed to OK NG
OK
12.INSPECT POWER DISTRIBUTION BOX ASSEMBLY
NG
REPLACE S-HORN RELAY
12.INSPECT POWER DISTRIBUTION BOX ASSEMBLY
a.
Remove the main body ECU (multiplex network body ECU).
1.354,0.25 1.771,0.5
0.417,0.25
4.813,0.5 5.229,0.75
0.417,0.25
5.719,1.375 5.99,1.094
true
0.115,0.063 0.427,0.219
0.313,0.156
10
false
*a
1.469,0.292 1.781,0.49
0.313,0.198
10
false
8E
4.927,0.531 5.24,0.729
0.313,0.198
10
false
MB
5.5,1.365 6.063,1.583
0.563,0.219
10
false
SH
| *a | Component without harness connected
(Power Distribution Box Assembly) |
- | - |
b.
Disconnect the 8E power distribution box assembly connector.
c.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition 8E-4 - MB-24 (SH) Always Below 1 Ω
- Result:
Proceed to OK NG
OK
13.CHECK HARNESS AND CONNECTOR (AUXILIARY BATTERY - S-HORN RELAY)
NG
REPLACE POWER DISTRIBUTION BOX ASSEMBLY
13.CHECK HARNESS AND CONNECTOR (AUXILIARY BATTERY - S-HORN RELAY)
a.
0.146,0.125 0.458,0.281
0.313,0.156
10
false
*1
| *1 | No. 1 Engine Room Relay Block |
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Switch Condition Specified Condition S-HORN relay holder terminal 1 - Body ground Ignition switch off 11 to 14 V S-HORN relay holder terminal 5 - Body ground Ignition switch off 11 to 14 V
- Result:
Proceed to OK NG
OK
14.CHECK HARNESS AND CONNECTOR (S-HORN RELAY - SECURITY HORN ASSEMBLY)
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
14.CHECK HARNESS AND CONNECTOR (S-HORN RELAY - SECURITY HORN ASSEMBLY)
a.
0.146,0.125 0.458,0.281
0.313,0.156
10
false
*1
| *1 | No. 1 Engine Room Relay Block |
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition S-HORN relay holder terminal 3 - A16-1 Always Below 1 Ω S-HORN relay holder terminal 3 or A16-1 - Other terminals and body ground Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
15.CHECK HARNESS AND CONNECTOR (S-HORN RELAY - POWER DISTRIBUTION BOX ASSEMBLY)
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
15.CHECK HARNESS AND CONNECTOR (S-HORN RELAY - POWER DISTRIBUTION BOX ASSEMBLY)
a.
0.146,0.125 0.458,0.281
0.313,0.156
10
false
*1
| *1 | No. 1 Engine Room Relay Block |
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition S-HORN relay holder terminal 2 - 8E-4 Always Below 1 Ω S-HORN relay holder terminal 2 or 8E-4 - Other terminals and body ground Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR