DESCRIPTION
When the alarm sounds, the following alarm functions operate: the roof console box assembly and No. 1 room light assembly illuminates, and the headlights, taillights and hazard lights flash, and the security horn and vehicle horn sound intermittently.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
PROCEDURE
1. |
CHECK THEFT DETERRENT SYSTEM OPERATION |
(a) Open the driver side window.
(b) Set the theft deterrent system.
(1) Close all doors and the hood.
(2) Lock the doors using wireless operation*1, key linked operation or entry operation*2.
(3) Wait for 30 seconds or more.
(c) After 30 seconds have elapsed, check that the security indicator light changes from illuminated to flashing.
(d) Unlock the driver door using the door lock knob.
(e) Check that each alarm component operates correctly.
Result
Result |
Proceed to |
---|---|
Security horn is not activated |
A |
Vehicle horn is not activated |
B |
Headlights, taillights or hazard lights are not activated |
C |
Interior lights are not activated |
D |
B | ![]() |
GO TO STEP 9 |
C | ![]() |
GO TO LIGHTING SYSTEM |
D | ![]() |
GO TO LIGHTING SYSTEM |
|
2. |
PERFORM ACTIVE TEST USING TECHSTREAM (SECURITY HORN) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Main Body / Active Test.
(e) Perform the Active Test according to the display on the Techstream.
Main Body
Tester Display |
Test Part |
Control Range |
Diagnostic Note |
---|---|---|---|
Security Horn |
Security horn assembly |
OFF/ON |
- |
OK:
The security horn assembly sounds and stops correctly when operated through the Techstream.
OK | ![]() |
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
|
3. |
INSPECT S-HORN RELAY |
(a) Remove the S-HORN relay from the engine room relay block.
(b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
NG | ![]() |
REPLACE S-HORN RELAY |
|
4. |
CHECK HARNESS AND CONNECTOR (BATTERY - S-HORN RELAY) |
(a) Remove the S-HORN relay from the engine room relay block assembly.
(b) Measure the voltage according to the value(s) in the table below. Standard Voltage:
|
|
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
5. |
INSPECT SECURITY HORN ASSEMBLY |
(a) Remove the security horn assembly (See page
).
(b) Inspect the security horn assembly (See page
).
NG | ![]() |
REPLACE SECURITY HORN ASSEMBLY |
|
6. |
CHECK HARNESS AND CONNECTOR (S-HORN RELAY - SECURITY HORN ASSEMBLY) |
(a) Remove the S-HORN relay from the engine room relay block assembly.
(b) Disconnect the S44 security horn assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
3 (S-HORN relay holder) - S44-1 |
Always |
Below 1 Ω |
3 (S-HORN relay holder) or S44-1 - Body ground |
Always |
10 kΩ or higher |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
7. |
CHECK HARNESS AND CONNECTOR (S-HORN RELAY - DRIVER SIDE JUNCTION BLOCK) |
(a) Remove the S-HORN relay from the engine room relay block assembly.
(b) Disconnect the 1F driver side junction block connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
2 (S-HORN relay holder) - 1F-31 |
Always |
Below 1 Ω |
2 (S-HORN relay holder) or 1F-31 - Body ground |
Always |
10 kΩ or higher |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
8. |
INSPECT DRIVER SIDE JUNCTION BLOCK |
(a) Remove the main body ECU (multiplex network body ECU) (See page
).
(b) Disconnect the driver side junction block connector.
(c) Measure the resistance according to the value(s) in the table below.
*a |
Component without harness connected (Driver Side Junction Block ) |
- |
- |
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
1F-31 - MB-29 (SH) |
Always |
Below 1 Ω |
OK | ![]() |
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
NG | ![]() |
REPLACE DRIVER SIDE JUNCTION BLOCK |
9. |
CHECK HORN OPERATION |
(a) Press the horn switch and check if the horn sounds.
OK:
Horn sounds
NG | ![]() |
GO TO HORN SYSTEM |
|
10. |
INSPECT DRIVER SIDE JUNCTION BLOCK |
(a) Remove the main body ECU (multiplex network body ECU) (See page
).
(b) Disconnect the driver side junction block connector.
(c) Measure the resistance according to the value(s) in the table below.
*a |
Component without harness connected (Driver Side Junction Block) |
- |
- |
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
1F-26 - MB-28 (HORN) |
Always |
Below 1 Ω |
OK | ![]() |
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
NG | ![]() |
REPLACE DRIVER SIDE JUNCTION BLOCK |
Terminals Of Ecu
TERMINALS OF ECU
1. BLIND SPOT MONITOR SENSOR LH (MASTER)
Terminal No.
(Symbol)
Wiring Color
Terminal Description
Condition
Specified Condition
B12-3 (BIND) - B12-10 (BLGD)
Y - W-B
Blind spot monitor ...
Seat Position Airbag Sensor Circuit Malfunction (B1653/35)
DESCRIPTION
The seat position airbag sensor circuit consists of the airbag sensor assembly
and the seat position airbag sensor.
DTC B1653/35 is stored when a malfunction is detected in the seat position airbag
sensor assembly circuit.
DTC No.
DTC Detection Condition
...
PTC Heater Circuit
DESCRIPTION
PTC HTR heater relays are closed in accordance with signals from the air conditioning
amplifier assembly and power is supplied to the quick heater assembly installed
on the radiator heater unit.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits rela ...