TOYOTA LAND CRUISER 1998 Factory Repair Manual

I27345
Cowl Side J/B RH
76
3Q
IND 25
G-RT5
Theft Deterrent ECU
12
3D
G-R 21
M5 14
M9
3
M5 8
M9 (*2)(*1)
(*2) (*1) SECURITY (*2) LP (*1)
GND (*2) GND1 (*1) Multi Display
Cowl Side J/B RHW-B
8
3D
10
3D
W-B W-BH
H HJ10
J/C
II
*1: w/ Navigation system
*2: w/o Navigation system
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
DI-969
1162 Author
: Date
:
2004 LAND CRUISER (RM1071U)
Security indicator circuit
CIRCUIT DESCRIPTION
When the theft deterrent system is preparing to be set, this circuit lights up the indicator.
When the system is set, the indicator blinks.
It also indicates the condition of the immobiliser system according to the request from the Transponder Key
ECU.
WIRING DIAGRAM
DIB4T-02

I24677
IND
(+) (-)
DI-970
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
1163 Author
: Date
:
2004 LAND CRUISER (RM1071U)
INSPECTION PROCEDURE
HINT:
In case of using the hand-held tester, start the inspection from step 1 and in case of not using the hand-held
tester, start from step 2.
1 Check security indicator using hand-held tester.
PREPARATION:
Connect the hand-held tester to the DLC 3.
CHECK:
Check that the theft deterrent in the indicator lights in ACTIVE TEST (See page DI-955).
OK Proceed to next circuit inspection shown in
problem symptoms table (See page DI-965).
NG
2 Check security indicator.
CHECK:
Connect the positive lead from the battery to terminal 7 (14) and
negative lead to terminal 6 (8), and check that the warning light
lights up.
( ): w/o Navigation system
OK:
Indicator light lights up.
NG Replace multi-display.
OK

- DIAGNOSTICSTHEFT DETERRENT SYSTEM
DI-971
1164 Author
: Date
:
2004 LAND CRUISER (RM1071U)
3 Check wire harness and connector between theft deterrent ECU and indicator,
indicator and body ground (See page IN-36).
NG Repair or replace wire harness or connector.
OK
Proceed to next circuit inspection shown in
problem symptoms table (See page
DI-965).

I27341
U1
Unlock Warning SWCowl Side J/B RH
Cowl Side J/B LHTheft Deterrent ECU
R-B
W-BW-BR-BKSW 12
T5 3Q 74 23
3E
3
3P1
3P
2E 18
IF 1
2
SB9
IL3
DI-974
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
1167 Author
: Date
:
2004 LAND CRUISER (RM1071U)
Key unlock warning switch circuit
CIRCUIT DESCRIPTION
The key unlock warning switch goes on when the ignition key is inserted the key cylinder and goes off when
the ignition key is removed.
The ECU operates the key confinement prevention function while the key unlock warning switch is ON.
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
In case of using the hand-held tester, start the inspection from step 1 and in case of not using the hand-held
tester, start from step 2.
1 Check unlock warning switch using hand-held tester.
PREPARATION:
Connect the hand-held tester to DLC 3.
CHECK:
Check that the unlock warning switch operate in DATA LIST (See page DI-1040).
OK Proceed to next circuit inspection shown on
problem symptoms table (See page DI-965).
NG
DIB4W-02

- DIAGNOSTICSTHEFT DETERRENT SYSTEM
DI-975
1168 Author
: Date
:
2004 LAND CRUISER (RM1071U)
2 Check key unlock warning switch (See pageBE-29).
NG Replace the key unlock warning switch.
OK
3 Check wireharness and connector between key unlock warning switch and theft
deterrent ECU (See page IN-26).
OK Repair or replace wireharness or connector.
OK
Proceed to next circuit inspection shown on
problem symptoms table
(See page DI-965).

DIB4S-02
DI-966
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
1159 Author
: Date
:
2004 LAND CRUISER (RM1071U)
CIRCUIT INSPECTION
Power source circuit
CIRCUIT DESCRIPTION
When the ignition switch is turned to the ACC position, battery positive voltage is applied to the terminal ACC
of the ECU.
Also, if the ignition switch is turned to the ON position, battery positive voltage is applied to the terminals ACC
and IG of the ECU.
When the battery positive voltage is applied to the terminal IG of the ECU while the theft deterrent system
is activated, the warning stops.
Furthermore, power supplied from the terminals ACC and IG of the ECU is used as power for the door courte-
sy switch, position switch, etc.

I27343
Cowl Side J/B RH
SECURITY
ECU-B2
25
3B 3C172
71
3Q3Q
B-R37
39
1 ECU-IG1+B1
5
23
1 IG1 No. 2 Relay
2E
2E 2CAM1IL314
SB
4
IG1
AM122
I18
Ignition Switch
Fusible Link Block
Engine Room R/BF161
F17
F15
1B24BAT
21 Short Pin (A)
1
1C
E 2
MAIN J/B No. 3 J/B No. 2140A ALT
29
Battery1
IF Cowl Side J/B LHT5
Theft Deterrent ECU
B-GLG
+B2 3
B SBIL312 26
2Q 22
2Q
2Q20
SBIL322IF
W-B B-GB-GL-B21
2Q IG10
B-W SBIL315 SB
L-O
Cowl Side J/B LH
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
DI-967
1160 Author
: Date
:
2004 LAND CRUISER (RM1071U)

DI-968
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
1161 Author
: Date
:
2004 LAND CRUISER (RM1071U)
INSPECTION PROCEDURE
1 Check ECU-B2 and SECURITY fuse.
CHECK:
Check continuity of ECU-B2 and SECURITY fuse.
OK:
Continuity
NG Replace faulty fuse.
OK
2 Check voltage between terminals +B1, +B2 and E of theft deterrent ECU connec-
tor.
PREPARATION:
(a) Turn the ignition switch OFF.
(b) Disconnect the theft deterrent ECU connector.
CHECK:
Measure the voltage between terminals +B1, +B2 and E.
OK:
Voltage: 10 - 14V
OK Proceed to next circuit inspection shown on
problem symptoms table (See page DI-965).
NG
3 Check wire harness and connector between theft deterrent ECU and body
ground (See page IN-36).
NG Repair or replace wire harness or connector.
OK
Proceed to next circuit inspection shown on
problem symptoms table
(See page DI-965).

I25780
T5
Theft Deterrent ECU
SH-
1
Horn DeterrentTheftT1W
W1
IL37
SB 3Q84
3B6 Cowl Side J/B RH DI-972
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
1165 Author
: Date
:
2004 LAND CRUISER (RM1071U)
Theft deterrent horn circuit
CIRCUIT DESCRIPTION
When the theft deterrent system is activated, the relay in the ECU is turned ON and OFF at of approximately
0.2 sec. interval, causing the theft deterrent horn to sound (See the wiring diagram below).
In this condition, if any of the following operations is done, the relay in the ECU is turned OFF, thus stopping
the theft deterrent horn from sounding:
(1) Unlock the driver door with key.
(2) Turn the ignition switch to ON position.
(3) Unlock the doors with the wireless door lock control system.
(4) Wait for approximately 60 seconds.
(5) Press the panic switch of the wireless door lock control system.
WIRING DIAGRAM
DIB4U-02

BE1239
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
DI-973
1166 Author
: Date
:
2004 LAND CRUISER (RM1071U)
INSPECTION PROCEDURE
HINT:
In case of using the hand-held tester, start the inspection from step 1 and in case of not using the hand-held
tester, start from step 2.
1 Check theft deterrent horn using hand-held tester.
PREPARATION:
Connect the hand-held tester to the DLC 3.
CHECK:
Check that the theft deterrent horn sounds in ACTIVE TEST (See page DI-955).
OK Proceed to next circuit inspection shown on
problem symptoms table (See page DI-965).
NG
2 Check theft deterrent horn.
CHECK:
Connect positive (+) lead to terminal 1 and negative (-) lead to
body ground of theft deterrent horn connector, and that the theft
deterrent horn blows.
OK:
Horn sounding.
NG Replace theft deterrent horn.
OK
3 Check wire harness and connector between theft deterrent ECU and theft deter-
rent horn (See page IN-26).
NG Check and repair wire harness or connector.
OK
Proceed to next circuit inspection shown on
problem symptoms table (See page
DI-965).