1998 TOYOTA LAND CRUISER brake

- DIAGNOSTICSENGINE
DI-43
236 Author
: Date
:
2004 LAND CRUISER (RM1071U)P0617
(DI-296)
Starter Relay Circuit High

Park/neutral position switch

Starter relay circuit

Ignition switch

ECM

P0657
(DI-294)Actuator Supply Voltage Circuit /
Open
ECM
P0724
(DI-424)Brake Switch ºBº Circuit High

Short in stop light switch signal circuit

Stop light switch

ECM

P2102
(DI-302)Throttle Actuator Control Motor
Circuit Low
Open in throttle control motor and sensor circuit

Throttle control motor and sensor

ECM

P2103
(DI-302)Throttle Actuator Control Motor
Circuit High

Short in throttle control motor and sensor circuit

Throttle control motor and sensor

Throttle valve

Throttle body

ECM

P2111
(DI-306)Throttle Actuator Control System
- Stuck Open

Throttle control motor and sensor circuit

Throttle control motor and sensor

Throttle valve

Throttle body

P2112
(DI-306)Throttle Actuator Control System
- Stuck Closed

Throttle control motor and sensor circuit

Throttle control motor and sensor

Throttle valve

Throttle body

P2118
(DI-310)Throttle Actuator Control Motor
Current Range/Performance
Open in throttle control motor and sensor power source circuit

ETCS fuse

ECM

P2119
(DI-315)Throttle Actuator Control Throttle
Body Range/Performance
Electric throttle control system

Throttle body
P2120
(DI-318)Throttle/Pedal Position Sensor/
Switch ºDº Circuit
Accelerator pedal position sensor

ECM
P2121
(DI-331)Throttle/Pedal Position Sensor/
Switch ºDº Circuit Range/Perfor-
mance

Accelerator pedal position sensor
P2122
(DI-318)Throttle/Pedal Position Sensor/
Switch ºDº Circuit Low Input

Accelerator pedal position sensor

VCPA circuit open

VPA circuit open or ground short

ECM

P2123
(DI-318)Throttle/Pedal Position Sensor/
Switch ºDº Circuit High Input
Accelerator pedal position sensor

EPA circuit open

ECM

P2125
(DI-318)Throttle/Pedal Position Sensor/
Switch ºEº Circuit
Accelerator pedal position sensor

ECM
P2127
(DI-318)Throttle/Pedal Position Sensor/
Switch ºEº Circuit Low Input

Accelerator pedal position sensor

VCP2 circuit open

VPA2 circuit open or ground short

ECM

P2128
(DI-318)Throttle/Pedal Position Sensor/
Switch ºEº Circuit High Input
Accelerator pedal position sensor

EPA circuit open

ECM

P2135
(DI-84)Throttle Pedal Position Sensor/
Switch ºAº / ºBº Voltage Correla-
tion
VTA1 and VTA2 circuit are short-circuited

Throttle control motor and sensor

ECM


DI-16
- DIAGNOSTICSENGINE
209 Author
: Date
:
FUEL SYS #1
Fuel system status (Bank1)/
OL or CL or OLDRIVE or OL-
FAULT or CLFAULT
Idli ft i CL

OL: Open Loop-has not yet sa-
tisfied conditions to go closed
loop.

CL: Closed Loop-using oxygen
sensor(s) as feed back for fuel
control.

OL DRIVE: Open loop due to
dri ing conditions (Po er enrich
FUEL SYS #2
Fuel system status (Bank2)/
OL or CL or OLDRIVE or OL-
FAULT or CLFAULT
Idling after warming up: CLdriving conditions (Power enrich-
ment, deceleration enlargement).

OL FAULT: Open loop due to de-
tected system fault.

CL FAULT: Closed loop, but fault
with at least one oxygen sensor
may be using single oxygen sen-
sor for fuel control.
FC IDLIdle fuel cut/
ON or OFFFuel cut operation: ON
FC IDL = ºONº when throttle valve
fully closed and engine speed is
over 1,500 rpm.
MILMIL status/
ON or OFFMIL ON: ON-
STARTER SIGStarter signal/
ON or OFFCranking: ON-
A/C SIGA/C signal/
ON or OFFA/C ON: ON-
PNP SW [NSW]Park/neutral position switch signal/
ON or OFFP or N range: ON-
ELECT LOAD SIGElectrical load signal/
ON or OFFDefogger switch ON: ON-
STOP LIGHT SWStop light switch/
ON or OFF
Brake pedal depressed: ON

Brake pedal released: OFF-
FUEL PMP SP CTLFuel pump speed control status/
ON or OFFIdling: ON-
FUEL PUMP/SPDFuel pump/speed status/
ON/H or OFF/M, LIdling: ON-
A/C MAG CLUTCHA/C magnet clutch status/
ON or OFFA/C magnet clutch ON: ON-
EVAP VSVVSV status for EVAP control/
ON or OFFVSV operating: ONVSV for EVAP is controlled by the
ECM (ground side duty control)
IGNITIONIgnition counter/
Min.: 0, Max.: 4000 to 400-
VAPOR PRESSVapor pressure/
Min.: -4.125 kPa, Max.: 2.125 kPaFuel tank cap removed:
0 kPaPressure inside of fuel tank as
read by the vapor pressure sen-
sor.
CYL #1 - CYL #8Misfire ratio of the cylinder/
Min.: 0%, Max.: 50%0%This item is displayed in only idling
*1: If no conditions are specifically stated for ºldlingº, it means the shift lever is in the N or P position, the A/C
switch is OFF and all accessory switches are OFF.

- DIAGNOSTICSENGINE
DI-33
226 Author
: Date
:
2004 LAND CRUISER (RM1071U)
(a) Preconditions
The monitor will not run unless:

MIL is OFF

Fuel level is approximately 1/2 to 3/4

Altitude is 7,800 feet (2,400 m) or less*

Engine Coolant Temperature (ECT) is between 4.4°C and 35°C (40°F and 95°F)

Intake Air Temperature (IAT) is between 4.4°C and 35°C (40°F and 95°F)

Cold Soak Procedure has been completed

Before starting the engine, the difference between ECT and IAT must be less than 7°C (13°F)
HINT:
Examples:

Scenario 1
ECT = 24°C (75°F)
IAT = 16°C (60°F)
Difference between ECT and IAT is 8°C (15°F)
" The monitor will not run because difference between ECT and IAT is greater than 7°C (13°F)

Scenario 2
ECT = 21°C (70°F)
IAT = 20°C (68°F)
Difference between ECT and IAT is 1°C (2°F)
" The monitor will run because difference between ECT and IAT is less than 7°C (13°F)
The readiness test can be completed in cold ambient conditions (less than 40°F / 4.4°C) and/or at
high altitudes (more than 7,800 feet / 2,400 m) if the drive pattern is repeated a second time after cycl-
ing the ignition off.
(b) Drive Pattern
(1) Connect the OBD II scan tool to DLC3 to check monitor status and preconditions (refer to ºaº).
(2) Release pressure in fuel tank by removing the fuel tank cap and then reinstalling it.
(3) Start the engine and allow it to idle until ECT becomes 75°C (167°F) or higher.
(4) Run the engine at 3,000 rpm for about 10 seconds.
(5) Allow the engine to idle with the A/C ON (to create slight load) for 15 to 50 minutes.
NOTICE:
If the vehicle is not equipped with A/C put a slight load on the engine by doing the following :

Securely set the parking brake.

Block the drive wheels with wheel chocks.

Allow the vehicle to idle in drive for 15 to 50 minutes.

- DIAGNOSTICSENGINE
DI-47
240 Author
: Date
:
2004 LAND CRUISER (RM1071U) #1 (E5-1) - E01 (E5-7)
#2 (E5-2) - E01 (E5-7)
#3 (E5-3) - E01 (E5-7)
#4 (E5 4) E01 (E5 7)
Y - W-B
B - W-B
L - W-B
RWB
IG switch ON9 to 14 V
#4 (E5-4) - E01 (E5-7)
#5 (E5-5) - E01 (E5-7)
#6 (E6-3) - E01 (E5-7)
#7 (E7-6) - E01 (E5-7)
#8 (E7-5) - E01 (E5-7)R - W-B
G - W-B
R-L - W-B
W - W-B
B-W - W-B
IdlingPulse generation
(See page DI-167)
KNK1 (E6-1) - E1 (E7-1)B - BRMiti i d t4000 ft iPulse generation
KNK2 (E6-2) - E1 (E7-1)W - BRMaintain engine speed at 4,000 rpm after warming upPulse generation
(See page DI-186)
G2+ (E7-27) - G2- (E7-32)R - GIdliPulse generation
NE+ (E7-25) - NE- (E7-24)L - GIdlingPulse generation
(See page DI-191)
PRG (E5-34) - E1 (E7-1)L-B - BRIG switch ON9 to 14 V
CCV (E5-27) - E1 (E7-1)L-R - BRIG switch ON9 to 14 V
TBP (E9-4) - E1 (E7-1)L - BRIG switch ON, disconnect vacuum hose from VSV for pressure
switching valve9 to 14 V
PTNK (E9 21) E2 (E5 28)L B BR WIgnition switch ON2.9 to 3.7 VPTNK (E9-21) - E2 (E5-28)L-B - BR-WApply vacuum 4.0 kPa (30 mmHg, 1.18 in.Hg)Below 0.5 V
SPD (E8-17) - E1 (E7-1)V - BRIG switch ON, Rotate driving wheel slowlyPulse generation
(See page DI-274)
M+ (E7-3) - E1 (E7-1)
M- (E7-2) - E1 (E7-1)R - BR
W - BRIdlingPulse generation
(See page DI-302)
FPR (E5-33) - E1 (E7-1)G-W - BRIG switch ON0 to 3.0 V
FC (E9-10) - E1 (E7-1)B-W - BRIG switch ON9 to 14 V
IGT1 (E5-9) - E1 (E7-1)
IGT2 (E5-8) - E1 (E7-1)
IGT3 (E5-25) - E1 (E7-1)
IGT4 (E5-11) - E1 (E7-1)
IGT5 (E5-12) - E1 (E7-1)
IGT6 (E5-26) - E1 (E7-1)
IGT7 (E5-13) - E1 (E7-1)
IGT8 (E5-10) - E1 (E7-1)B - BR
R - BR
L - BR
G - BR
Y - BR
B-Y - BR
B-L - BR
L-B - BR
IdlingPulse generation
(See page DI-202)
IGF1 (E5 24) E1 (E7 1)BW BRIG switch ON4.5 to 5.5 VIGF1 (E5-24) - E1 (E7-1)
IGF2 (E5-23) - E1 (E7-1)B-W - BR
B-R - BR
IdlingPulse generation
(See page DI-202)
STP (E8 19) E1 (E7 1)GW BRBrake pedal is depressed7.5 to 14 VSTP (E8-19) - E1 (E7-1)G-W - BRBrake pedal is releasedBelow 1.5 V
ST1 (E8 12) E1 (E7 1)RG BRBrake pedal is depressedBelow 1.5 VST1- (E8-12) - E1 (E7-1)R-G - BRBrake pedal is released7.5 to 14 V
STA (E5-17) - E1 (E7-1)B-R - BRShift lever range P or N, Ignition switch START6.0 V or more
STSW (E7-12) - E1 (E7-1)B-W - BRShift lever range P or N, ignition switch START6.0 V or more
ACCR (E5-15) - E1 (E7-1)R-G - BRShift lever range P or N, ignition switch START9 to 14 V
STAR (E6-9) - E1 (E7-1)B-W - BRShift lever range P or N, ignition switch START9 to 14 V
NSW (E5 16) E1 (E7 1)BW BRIG switch ON, Other shift position in P, N9 to 14 VNSW (E5-16) - E1 (E7-1)B-W - BRIG switch ON, Shift position in P, N0 to 3.0 V
W (E9 11) E1 (E7 1)WBRIdling9 to 14 VW (E9-11) - E1 (E7-1)W - BRIG switch ONBelow 3.0 V
SIL (E9-18) - E1 (E7-1)V-W - BRDuring transmissionPulse generation
TACH (E9-5) - E1 (E7-1)B - BRIdlingPulse generation

EM-2
- ENGINE MECHANICALCO/HC
1575 Author
: Date
:
2004 LAND CRUISER (RM1071U)
6. TROUBLESHOOTING
HINT:
If the CO/HC concentration does not comply with the regula-
tions, perform troubleshooting in the order given below.
See the table below for possible causes, and then inspect and
correct the applicable causes if necessary.
COHCProblemsCauses
NormalHighRough idle1. Faulty ignitions:

Incorrect timing

Fouled, shorted or improperly gapped plugs
2. Incorrect valve clearance
3. Leaky intake and exhaust valves
4. Leaky cylinders
LowHighRough idle
(fluctuating HC reading)1. Vacuum leaks:

PCV hoses

Intake manifold

Throttle body

Brake booster line
2. Lean mixture causing misfire
HighHighRough idle
(Black smoke from exhaust)1. Restricted air filter
2.Faulty SFI systems:

Faulty pressure regulator

Defective ECT sensor

Faulty ECM

Faulty injectors

Faulty throttle position sensor

Faulty MAF meter

A19472
A17671A19482
A17679
A09148
EVAP Pipe
A08655
- ENGINE MECHANICALCYLINDER HEAD
EM-37
1610 Author
: Date
:
2004 LAND CRUISER (RM1071U)
(s) Remove the 2 bolts and disconnect the engine wire pro-
tector from the intake manifold.
(t) Remove the engine wire from the engine hanger.
(u) Remove the engine wire from the wire bracket.
(v) Remove the RH rear and the LH front V-bank cover
brackets.
(w) Remove the 6 bolts, the 4 nuts, the intake manifold as-
sembly and the 2 gaskets.
13. DISASSEMBLE UPPER AND LOWER INTAKE MAN-
IFOLDS
(a) Remove the throttle body (See page SF-36).
(b) Remove the 13 bolts, the 3 nuts, the upper intake man-
ifold and the gasket.
(c) Disconnect the EVAP hose from the upper intake man-
ifold, and remove the accelerator cable clamp and VSV
for EVAP.
(d) Remove the bolt, the union, the 2 gaskets and the brake
booster tube from the upper intake manifold.
(e) Remove the 2 bolts and the EVAP pipe from the intake
manifold.
(f) Disconnect the fuel return hose from the fuel pressure
regulator.
(g) Remove the 3 bolts holding the fuel return hose from the
lower intake manifold.
(h) Remove the fuel pressure regulator, the fuel pressure
pulsation damper and the 2 gaskets.
(i) Remove the bolt and the rear fuel pipe.
(j) Remove the 2 delivery pipes and the 8 injectors (See
page
SF-22).

[N]
[O]
[P]
[Q]
[R]
[S]
[T]
[U]
2004 LAND CRUISER (EWD548U)
6B HOW TO USE THIS MANUAL
Current is applied at all times through the STOP fuse to TERMINAL 2 of the stop light SW.
When the ignition SW is turned on, current flows from the GAUGE fuse to TERMINAL 8 of the light failure sensor, and also flows
through the rear lights warning light to TERMINAL 4 of the light failure sensor.
Stop Light Disconnection Warning
When the ignition SW is turned on and the brake pedal is pressed (Stop light SW on), if the stop light circuit is open, the current
flowing from TERMINAL 7 of the light failure sensor to TERMINALS 1, 2 changes, so the light failure sensor detects the
disconnection and the warning circuit of the light failure sensor is activated.
As a result, the current flows from TERMINAL 4 of the light failure sensor to TERMINAL 11 to GROUND and turns the rear lights
warning light on. By pressing the brake pedal, the current flowing to TERMINAL 8 of the light failure sensor keeps the warning
circuit on and holds the warning light on until the ignition SW is turned off.
S6 Stop Light SW
2-1 : Closed with the brake pedal depressed
L4 Light Failure Sensor
1, 2, 7-Ground : Approx. 12 volts with the stop light SW on
4, 8-Ground : Approx. 12 volts with the ignition SW at ON position
11-Ground : Always continuity
: Parts Location
CodeSee PageCodeSee PageCodeSee Page
C734L436R737
H1736R637S635
: Relay Blocks
CodeSee PageRelay Blocks (Relay Block Location)
118R/B No.1 (Instrument Panel Brace LH)
: Junction Block and Wire Harness Connector
CodeSee PageJunction Block and Wire Harness (Connector Location)
IB20Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
3C22Instrument Panel Wire and J/B No.3 (Instrument Panel Brace LH)
: Connector Joining Wire Harness and Wire Harness
CodeSee PageJoining Wire Harness and Wire Harness (Connector Location)
IE142Floor Wire and Instrument Panel Wire (Left Kick Panel)
BV150Luggage Room Wire and Floor Wire (Luggage Room Left)
: Ground Points
CodeSee PageGround Points Location
BL50Under the Left Center Pillar
BO50Back Panel Center
: Splice Points
CodeSee PageWire Harness with Splice PointsCodeSee PageWire Harness with Splice Points
I544Cowl WireB1850Luggage Room Wire
System Outline
Service Hints

2004 LAND CRUISER (EWD548U)
8B HOW TO USE THIS MANUAL
The ground points circuit diagram shows the connections from all major parts to the respective ground points. When
troubleshooting a faulty ground point, checking the system circuits which use a common ground may help you identify
the problem ground quickly. The relationship between ground points (
EA, IB and IC shown below) can also be
checked this way.
5
5
5
5
4
44
4
4 BA15IB18EA2
ID115
IC33 IA12 E 3
W-BW-B W-B W-B W-B
W-B
W-B
W-B
W-B W-B
W-B
W-B W-B
W-B
W-B W-B W-BW-B W-B W-B W-B
W-B
W-B
W-B
W-B W-B W-B
W-B
BR
W-B
BR BRW-BW-B W-B
W-B
W-B
W-B
W-B W-B W-B
W-B
W-B W-B
W-B
W-B
BR W-B
BR BR
BR W-B (4A-GZE)
W-B W-BI 2
I 2
B 5 I 5 I 5 I 5
B 5
B 5
B 5
I 5
I 5
I 3 I 3 E 3
E 3
E 3
E 2
E 4
E 5
E 4
E 5
E 6 E 4 E 4
B 4
EA I 4
B 4
B 4
I 4 I 8
IB IC 443E5
3E6 3G13 3F3 3D1 3B7W-B
W-B
W-B W-B W-B
W-B
W-B
W-B
W-B
W-B
W-B
W-B
W-B
W-B W-BI 6
I 6
I 2 3C7
10A A A A
A
A
Junction
Connector J 1
W-B
W-B
W-B W-B
BR W-B W-B
W-B
W-B W-B
W-B
I GROUND POINT
FAN MAIN Relay
FAN MAIN Relay
A/C Relay No.2
A/C Relay No.3
Radiator Fan Motor
Headlight Cleaner Relay
Headlight LH
Headlight RH
Front Fog Light LH
Brake Fluid Level SW Front Fog Light RH Front Turn Signal Light RH
Front Clearance Light RH
Front Turn Signal Light LH
Front Clearance Light LH
Door Lock Control SW
Door Courtesy SW RH
Door Lock Motor RH
Door Lock Control Relay
Blower Resistor
Idle-Up SW
A/C Amplifier
Radio and Player
HEATER Relay
Auto Antenna MotorA/C Control Assembly
Blower Motor
Blower SW
Parking Brake SW
Combination Meter
Combination SW
Cruise Control ECU
Remote Control Mirror SW
Turn Signal Flasher
Defogger SW
Unlock Warning SW
Power Window Master SW
Power Window Control
Relay
Door Courtesy SW LH
Door Lock Control SW
Door Lock Motor LH
Fuel Control SW
Woofer Speaker Amplifier
Combination Meter
Combination Meter
Fuel Sender Cigarette Lighter
O/D Main SW
Clock
Combination SW
*The system shown here is an EXAMPLE ONLY. It is different to the actual circuit shown in the SYSTEM CIRCUITS SECTION.