1996 TOYOTA LAND CRUISER wiring

IN0CO−12
FI1066
Z11554
Seal Lock Adhesive
IN−4
−
INTRODUCTION REPAIR INSTRUCTIONS
4
Author: Date:
1996 LAND CRUISER (RM451U)
REPAIR INSTRUCTIONS
GENERAL INFORMATION
BASIC REPAIR HINT
(a) Use fender, seat and floor covers to keep the vehicle
clean and prevent damage.
(b) During disassembly, keep parts in the appropriate order to facilitate reassembly.
(c) Installation and removal of battery terminal: (1) Before performing electrical work, disconnect the
negative (−) terminal cable from the battery.
(2) If it is necessary to disconnect the battery for in- spection or repair, first disconnect the negative ( −)
terminal cable.
(3) When disconnecting the terminal cable, to prevent damage to battery terminal, loosen the cable nut
and raise the cable straight up without twisting or
prying it.
(4) Clean the battery terminals and cable ends with a clean shop rag. Do not scrape them with a file or oth-
er abrasive objects.
(5) Install the cable ends to the battery terminals after loosening the nut, and tighten the nut after installa-
tion. Do not use a hammer to tap the cable ends
onto the terminals.
(6) Be sure the cover for the positive (+) terminal is properly in place.
(d) Check hose and wiring connectors to make sure that they
are connected securely and correctly.
(e) Non−reusable parts (1) Always replace cotter pins, gaskets, O−rings, oilseals, etc. with new ones.
(2) Non−reusable parts are indicated in the component illustrations by the ” ” symbol.
(f) Precoated parts Precoated parts are bolts, nuts, etc. that are coated with
a seal lock adhesive at the factory.
(1) If a precoated part is retightened, loosened orcaused to move in any way, it must be recoated with
the specified adhesive.
(2) When reusing precoated parts, clean off the old
adhesive and dry with compressed air. Then apply
the specified seal lock adhesive to the bolt, nut or
threads.
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INTRODUCTION FOR ALL OF VEHICLES
IN−15
15
Author: Date:
1996 LAND CRUISER (RM451U)
3. FOR VEHICLES EQUIPPED WITH A CATALYTIC CONVERTER
CAUTION:
If large amount of unburned gasoline flows into the converter, it may overheat and create a fire haz-
ard. To prevent this, observe the following precautions and explain them to yo\
ur customer.
(a) Use only unleaded gasoline.
(b) Avoid prolonged idling.
Avoid running the engine at idle speed for more than 20 minutes.
(c) Avoid spark jump test. (1) Perform spark jump test only when absolutely necessary. Perform this test as rapidly as possible.
(2) While testing, never race the engine.
(d) Avoid prolonged engine compression measurement. Engine compression tests must be done as rapidly as possible.
(e) Do not run engine when fuel tank is nearly empty. This may cause the engine to misfire and create an extra load on the con\
verter.
(f) Avoid coasting with ignition turned off.
(g) Do not dispose of used catalyst along with parts contaminated with gasol\
ine or oil.
4. IF VEHICLE IS EQUIPPED WITH MOBILE COMMUNICATION SYSTEM
For vehicles with mobile communication systems such as two− way radios and cellular telephones, observe
the following precautions. (1) Install the antenna as far as possible away from the ECU and sensors of the vehicle’\
s electronic
system.
(2) Install the antenna feeder at least 20 cm (7.87 in.) away from the ECU and se\
nsors of the ve- hicle’s electronic systems. For details about ECU and sensors locations, refer\
to the section on
the applicable component.
(3) Avoid winding the antenna feeder together with other wiring as much as possible, and also avoid
running the antenna feeder parallel with other wire harnesses.
(4) Check that the antenna and feeder are correctly adjusted.
(5) Do not install powerful mobile communications system.
5. FOR USING OBD II SCAN TOOL OR TOYOTA HAND −HELD TESTER
CAUTION:
Observe the following items for safety reasons:
Before using the OBD II scan tool or TOYOTA hand −held tester, the OBD II scan tool’s instruc-
tion book or TOYOTA hand −held tester’s operator manual should be read thoroughly.
Be sure to route all cables securely when driving with the OBD II scan too\
l or TOYOTA hand −
held tester connected to the vehicle. (i.e. Keep cables away from feet,\
pedals, steering wheel
and shift lever.)
Two persons are required when test driving with the OBD II scan tool or TOYOTA hand −held
tester, one person to drive the vehicle and the other person to operate the OBD\
II scan tool or
TOYOTA hand−held tester.
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V08423
Knock Sensor 1
GR ECM
KNK E1
12
E6
WIRING DIAGRAM
Wiring Diagram
This shows a wiring diagram of the circuit.
Use this diagram together with ELECTRICAL
WIRING DIAGRAM to thoroughly understand the
circuit.
Wire colors are indicated by an alphabetical code.
B = Black, L = Blue, R = Red, BR = Brown,
LG = Light Green, V = Violet, G = Green,
O = Orange, W = White, GR = Gray, P = Pink,
Y = Yellow, SB = Sky Blue
The first letter indicates the basic wire color and
the second letter indicates the color of the stripe.
DTC P0325Knock Sensor 1 Circuit Malfunction
CIRCUIT DESCRIPTION
Knock sensor is fitted to the cylinder block to detect engine knocking. This sensor c\
ontains a piezoelectric element which
generates a voltage when it becomes deformed, which occurs when the cyli\
nder block vibrates due to knocking. If engine
knocking occurs, ignition timing is retarded to suppress it.
DTC No. DTC Detection Condition Trouble Area
P0325 No knock sensor 1 signal to ECM with engine speed,
1,200 rpm or more.  Open or short in knock sensor1 circuit
 Knock sensor 1 (looseness)
 ECM
If the ECM detects the above diagnosis conditions, it operates the fall sa\
fe function in which the corrective retard angle
value is set to the maximum value.
 Diagnostic Trouble Code No. and Detection Item
 Circuit Description
The major role and operation, etc. of the circuit
and its component parts are explained.
 Indicates the diagnostic trouble code, diagnostic
trouble code set parameter and suspect area of
the problem.

IN−26
−
INTRODUCTION HOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMS
1996 LAND CRUISER (RM451U)
6. CIRCUIT INSPECTION
How to read and use each page is shown below.
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BE−6
−
BODY ELECTRICAL BODY ELECTRICAL SYSTEM
1996 LAND CRUISER (RM451U)
Engine oil level warning light does not light up.
1. Bulb
2. Meter Circuit
3. Engine Oil Level Warning Switch
4. Wire Harness−
BE−32
BE−34 −
Low oil pressure warning light does not light up.
1. Bulb
2. Low Oil Pressure Warning Switch
3. Meter Circuit
4. Wire Harness−
BE−32
BE−34 −
Fuel level warning light does not light up.
1. Bulb
2. Fuel Level Warning Switch
3. Meter Circuit
4. Wire Harness−
BE−34
BE−32 −
INDICATOR LIGHTS:
COMBINATION METER
SymptomSuspect AreaSee page
High beam indicator light does not light up.
1. Bulb
2. Headlight and Taillight System
3. Meter Circuit
4. Wire Harness−
BE−19
BE−32 −
Shift indicator lights do not light up. (ALL)
1. Shift Position Indicator Wiring Circuit
2. Park/Neutral Position Switch
3. Wire Harness
4. Bulb−
BE−34 AT −6
−
Shift indicator lights do not light up. (L, 2, D)
1. Bulb
2. Shift Position Indicator Wiring Circuit
3. Park/Neutral Position Switch
4. Light Control Rheostat
5. Wire Harness−
BE−34 AT −6
BE−34 −
Shift indicator lights do not light up. (PWR)
1. Bulb
2. Shift Position Indicator Wiring Circuit
3. Pattern Select Switch
4. Wire Harness−
BE−34 AT −6
−
Shift indicator lights do not light up. (2nd START)
1. Bulb
2. Shift Position Indicator Wiring Circuit
3. ECM
4. Wire Harness−
AT −6
−
−
Only one shift indicator does not light up.1. Bulb
2. Shift Position Indicator Wiring Circuit−
BE−34
Indicator lights do not light up. (Except Turn, Hi −beam)1. GAUGE Fuse (I/P F/B)
2. Wire Harness−
−
O/D OFF indicator light does not light up.
1. Bulb
2. O/D Main Switch
3. Meter Circuit
4. Wire Harness−
−
BE−32 −
Malfunction indicator light does not light up.
1. Bulb
2. ECM
3. Wire Harness−
−
−
Cruise control indicator light does not light up.
1. Bulb
2. Cruise Control ECU
3. Meter Circuit
4. Wire Harness−
−
BE−32 −
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P03788
CORRECT WRONG
Clearance
Z00038
Nippondenso Borroughs
−
CHARGING CHARGING SYSTEM
CH−3
1996 LAND CRUISER (RM451U)
(b) Check the fusible link and fuses for continuity.
Fusible link
MAIN 2.0 A
AM1 1.25 B
AM2 0.3 P
H−fuseAM1 50 A
FuseIGN 7.5 A
GAUGE 15 A
3. INSPECT DRIVE BELTS
(a) Visually check the drive belt for cracks, oiliness or wear.
Check that the belt does not touch the bottom of the pulley
groove.
If necessary, replace the drive belts as a set.
(b) Using a belt tension gauge, measure the belt tension. Belt tension gauge:
Nippondenso BTG−20 (95506 −00020)
Borroughts No. BT−33−73F
Drive belt tension:
New belt400 − 580 N (41.0 − 59.1 kgf, 90.4 − 130.2 lbf)
Used belt200 − 390 N (20.4 − 40.0 kgf, 45.0 − 88.2 lbf)
If the belt tension is not as specified, adjust it.
HINT:
”New belt” refers to a belt which has been used less than
5 minutes on a running engine.
”Used belt” refers to a belt which has been used on a run-
ning engine for 5 minutes or more.
After installing a new belt, run the engine for about 5 min-
utes and recheck the belt tension.
4. VISUALLY CHECK GENERATOR WIRING AND LIS- TEN FOR ABNORMAL NOISES
(a) Check that the wiring is in good condition.
(b) Check that there is no abnormal noise from the generator
while the engine is running.
5. INSPECT DISCHARGE WARNING LIGHT CIRCUIT
(a) Turn the ignition switch ”ON”. Check that the discharge warning light comes on.
(b) Start the engine. Check that the light goes off.
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DI5OX−03
FI6526
12345678910
11
1213
1415161718192021222324252612345678
910
11
1213141516 123456
78
910
11
12 12345678910
11
1415161718192021221213
E4 E5E6 E7
ECM Terminals
−
DIAGNOSTICS ENGINE
DI−17
1996 LAND CRUISER (RM451U)
TERMINALS OF ECM
Symbols (Terminals No.)Wiring ColorConditionSTD Voltage (V)
BATT (E7 − 2) − E1 (E4 − 24)R − Y ↔ BR − BAlways9 − 14
+ B (E7 − 12) − E1 (E4 − 24)Y ↔ BR − BIG switch ON9 − 14
VCC (E5 − 1) − E2 (E5 − 9)R − G ↔ BR − BIG switch ON4.5 − 5.5
IDL (E5 − 11) − E2 (E5 − 9)G − W ↔ BR − B
IG switch ON and apply vacuum to the throttle opener
Throttle valve fully closed0 − 3
IG switch ON
Throttle valve fully open9 − 14
VTA (E5 − 10) − E2 (E5 − 9)G − B↔ BR − B
IG switch ON
Throttle valve fully closed0.3 − 0.8
IG switch ON
Throttle valve fully open3.2 − 4.9
VG (E5 − 2) − E21 (E5 − 16)G − BRIdling, N position, A/C switch OFF1.1 − 1.5
THA (E5 − 3) − E2 (E5 − 9)L − Y ↔ BR − BIdling, Intake air temp. 20° C (68° F)0.5 − 3.4
THW (E5 − 4) − E2 (E5 − 9) R − W↔BR − BIdling, Engine coolant temp. 80 °C (176°F)0.2 − 1.0
STA (E7 − 11) − E1 (E4 − 24)B − R ↔ BR − BCranking6.0 or more
#10 (E4 − 12) − E01 (E4 − 13)W − L ↔ BR
IG switch ON9 − 14
IdlingPulse generation
(See page DI−54)
#20 (E4 − 11) − E01 (E4 − 13)W − R ↔ BR
IG switch ON9 − 14
IdlingPulse generation
(See page DI−54)
#30 (E4 − 25) − E01 (E4 − 13)W − G ↔ BR
IG switch ON9 − 14
IdlingPulse generation
(See page DI−54)
#40 (E4 − 2) − E01 (E4 − 13)Y ↔ BR
IG switch ON9 − 14
IdlingPulse generation
(See page DI−54)
#50 (E4 − 1) − E01 (E4 − 13)Y − R ↔ BR
IG switch ON9 − 14
IdlingPulse generation
(See page DI−54)
#60 (E4 − 15) − E01 (E4 − 13)Y − L ↔ BR
IG switch ON9 − 14
IdlingPulse generation
(See page DI−54)
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P22419
WR−Y
GECM
Y−R R
R
BR
Battery Fusible Link
EFI
R/B No.2
EFI Main
Relay
Y−R
FL MAIN
BR
1
Mass Air Flow
Meter
2
2 2
2 2
2
1 1
1
F8 2
4
3 E7
E5
E5 VGMRLY
2
23
7
5 16B+
E1
EB
E21
EB1 EA2
−
DIAGNOSTICS ENGINE
DI−21
1996 LAND CRUISER (RM451U)
WIRING DIAGRAM
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DIAGNOSTICS ENGINE
DI−25
1996 LAND CRUISER (RM451U)
DTC P0101 Mass Air Flow Circuit Range/Performance
Problem
CIRCUIT DESCRIPTION
Refer to DTC P0100 (Mass Air Flow Circuit Malfunction) on page DI−20.
DTC No.DTC Detecting ConditionTrouble Area
P0101
Conditions (a) and (b) continue with engine speed 900 rpm or
less (2 trip detection logic):
(a) Closed throttle position switch: ON
(b) Mass air flow meter output > 2.2 V
Mass air flow meterConditions (a) and (b) continue with engine speed 1500 rpm
(2 trip detection logic):
(a) Mass air flow meter output < 1 V
(b) VTA  0.72 V
WIRING DIAGRAM
Refer to DTC P0100 (Mass Air Flow Circuit Malfunction) on page DI−20 for the WIRING DIAGRAM.
INSPECTION PROCEDURE
1 Are there any other codes (besides DTC P0101) being output?
YES Go to relevant DTC chart.
NO
Replace mass air flow meter.
DI5P0−02
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