1998 TOYOTA LAND CRUISER engine coolant

DI-4
- DIAGNOSTICSENGINE
197 Author
: Date
:

The diagnosis system operates in ºnormal modeº
during normal vehicle use. In ºnormal modeº, 2 trip
detection logic* is used to ensure accurate detec-
tion of malfunctions. A ºcheck modeº is also avail-
able to technicians as an option. In ºcheck modeº,
1 trip detection logic is used for simulating malfunc-
tion symptoms and increasing the system's ability to
detect malfunctions, including intermittent malfunc-
tions (hand-held tester only) (See step 3).

*2 trip detection logic:
When a malfunction is first detected, the malfunc-
tion is temporarily stored in the ECM memory. This
is known as 1st trip detection. If the ignition switch
is turned OFF and then ON again, and the same
malfunction is detected again, the MIL will illumi-
nate. This is known as 2nd trip detection.

Freeze frame data:
The freeze frame data records the engine condi-
tions (fuel system, calculated load, engine coolant
temperature, fuel trim, engine speed, vehicle
speed, etc.) when a malfunction is detected. When
troubleshooting, freeze frame data can help deter-
mining if the vehicle was running or stopped, if the
engine was warmed up or not, if the air-fuel ratio
was lean or rich, and other data from the time the
malfunction occurred.
Priorities for troubleshooting:
When multiple DTCs occur, find out the order in which the DTCs
should be inspected by checking the component's DTC chart.
If no instructions are written in the DTC chart, check DTCs in the
following order of priority:
(1) DTCs other than fuel trim malfunction DTCs
(P0171, P0172, P0174 and P0175) and misfire
DTCs (P0300 to P0308).
(2) Fuel trim malfunction DTCs (P0171, P0172, P0174
and P0175).
(3) Misfire DTCs (P0300 to P0308).

DI-8
- DIAGNOSTICSENGINE
201 Author
: Date
:
(6) Start the engine. The MIL should turn off after the
engine starts.
(7) Simulate the conditions of the malfunction de-
scribed by the customer.
(8) After simulating the malfunction conditions, use the
hand-held tester diagnosis selector to check the
DTC, freeze frame data and other data.
(9) After checking the DTC, inspect the applicable cir-
cuit.
(b) Clearing DTCs using the OBD ll scan tool or the hand-
held tester.
(1) Connect the OBD ll scan tool or the hand-held tes-
ter to the DLC3.
(2) Turn the ignition switch ON.
(3) Erase DTCs and freeze frame data with the OBD II
scan tool (complying with SAE J1978) or the hand-
held tester. For the hand-held tester: 1) enter the
following menus: DIAGNOSIS ENHANCED OBD II
/ DTC INFO / CLEAR CODES; and 2) press YES.
For the OBD II scan tool, see its instruction manual.
(c) Clearing the DTCs without using the OBD ll scan tool or
the hand-held tester.
Remove the EFI or ECD No. 1 and ETCS fuses from the
engine room J/B for more than 60 seconds, or disconnect
the battery terminal for more than 60 seconds.
After disconnecting the battery terminal, perform the ºINI-
TIALIZEº procedure.
4. FAIL-SAFE CHART
If any of the following code is recorded, the ECM enters fail-safe mode.
DTC No.Fail-Safe OperationFail-Safe Deactivation Conditions
P0031
P0032
P0037
P0038
P0051
P0052
P0057
P0058
The heater circuit in which an abnormality is detected is
turned offIgnition switch OFF
P0100
P0102
P0103Ignition timing is calculated from engine speed and throttle
angleºPassº condition detected
P0110
P0112
P0113
Intake air temperature is fixed at 20°C (68°F)ºPassº condition detected
P0115
P0117
P0118
Engine coolant temperature is fixed at 80°C (176°F)ºPassº condition detected

DI-14
- DIAGNOSTICSENGINE
207 Author
: Date
:
7. DATA LIST
HINT:
Using the hand-held tester DATA LIST allows switch, sensor, actuator and other item values to be read with-
out removing any parts. Reading the DATA LIST early in troubleshooting is one way to shorten labor time.
NOTICE:
In the table below, the values listed under ºNormal Conditionº are reference values. Do not depend
solely on these reference values when deciding whether a part is faulty or not.
(a) Warm up the engine.
(b) Turn the ignition switch OFF.
(c) Connect the hand-held tester or the OBD II scan tool to the DLC3.
(d) Turn the ignition switch ON.
(e) Push the ºONº button of the hand-held tester.
(f) Enter the following menus: DIAGNOSIS / ENHANCED OBD II / DATA LIST.
(g) According to the display on tester, read the ºDATA LISTº.
ItemMeasurement Item/Range
(Display)Normal Condition*Diagnostic Note
INJECTOR
Injection period of the
No. 1 cylinder/
Min.: 0 ms, Max.: 32.64 ms
Idling: 2.1 to 3.9 ms-
IGN ADVANCE
Ignition timing advance
for No.1 cylinder/
Min.: -64 deg., Max.: 63.5 deg.
Idling: BTDC 5 to 25°-
CALC LOADCalculated load by ECM/
Min.: 0%, Max.: 100%
Idling: 12.5 to 19.7%

Racing without load (2,500 rpm):
10.7 to 17.9%
-
MAFAir flow rate from MAF sensor/
Min.: 0 gm/s, Max.: 655 gm/s

Idling:
4.1 to 6.4 gm/sec.

Racing without load (2,500 rpm):
12.5 to 20.8 gm/sec.
If value is approximately 0.0 gm/s:

Mass air flow meter power
source circuit open

VG circuit open or short
If value is 160.0 gm/s or more:

E2G circuit open
ENGINE SPDEngine Speed/
Min.: 0 rpm, Max.: 16,383 rpmIdling:
650 to 750 rpm-
COOLANT TEMPCoolant temperature/
Min.: -40°C, Max.: 140°CAfter warming up:
80 to 95°C (176 to 203°F)
If value is -40C (-40F): sensor
circuit is open.
INTAKE AIRIntake air temperature/
Min.: -40 °C, Max.: 140 °CEquivalent to ambient temp.
(After cold soak)
circuit is oen.

If value is 140C (284F) or
more: sensor circuit is shorted.
THROTTLE POSAbsolute throttle position sensor/
Min.: 0%, Max.: 100%
Throttle fully closed: 10 to 24%

Throttle fully open: 66 to 98%Read value with the ignition switch
ON (Do not start engine).
THROTTLE INITIALThrottle fully closed rearing value0.5 to 0.9 V-
CTP SWClosed throttle position switch/
ON or OFF
Throttle fully closed: ON

Throttle open: OFF-
VEHICLE SPDVehicle speed/
Min.: 0 km/h, Max.: 255 km/hVehicle stopped: 0 km/h (0 mph)Speed indicated on speedometer
O2S B1 S1
Oxygen sensor output voltage of
the bank 1 sensor 1/
Min.: 0 V, Max.: 1.275 V
Idli 01t 09V
Performing INJ VOL or A/F CON-
TROL function of ACTIVE TEST
enables the technician to check
the voltage output of each sensor.
O2S B2 S1
Oxygen sensor output voltage of
the bank 2 sensor 1/
Min.: 0 V, Max.: 1.275 V
Idling: 0.1 to 0.9 VPerforming INJ VOL or A/F CON-
TROL function of ACTIVE TEST
enables the technician to check
the voltage output of each sensor.

A18907
(64 to 88 km/h)
(56 to 72 km/h)
Idling
Ignition OFF
Warmed up3 minutes
7 minutes 40 to 55 mph
35 to 45 mph
- DIAGNOSTICSENGINE
DI-31
224 Author
: Date
:
2004 LAND CRUISER (RM1071U)
2. CATALYST MONITOR (O2S TYPE)
(a) Preconditions
The monitor will not run unless:

MIL is OFF.

Engine Coolant Temperature (ECT) is 75°C (167°F) or greater.

Intake Air Temperature (IAT) is -10°C (14°F) or greater
NOTICE:
The readiness test can be completed in cold ambient conditions (less than -10°C / 14°F), if the drive
pattern is repeated a second time after cycling the ignition off.
(b) Drive Pattern
(1) Connect the OBD II scan tool to the DLC3 to check monitor status and preconditions.
(2) Drive the vehicle at 40 to 55 mph (64 to 88 km/h) for approximately for 3 minutes.
NOTICE:
Drive with smooth throttle operation and avoid sudden acceleration.
If IAT is less than 10°C (50°F) when engine was started, drive the vehicle at 40 to 55 mph (64 to 88
km/h) for additional 4 minutes.
(3) Drive the vehicle at 35 to 45 mph (56 to 72 km/h) for approximately 7 minutes.
NOTICE:
Drive with smooth throttle operation and avoid sudden deceleration as much as possible with the
throttle fully closed.
(4) If readiness status does not switch to complete, make sure that the preconditions are met and
the ignition switch is turned OFF and then repeat steps (2) and (3).
(5) Release pressure in the fuel tank by removing and then reinstalling the fuel tank cap.
(6) Start the engine and immediately begin driving as directed.

- 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.

DI1L7-17
A19624
E8 E7
E6 E5E9 DI-46
- DIAGNOSTICSENGINE
239 Author
: Date
:
2004 LAND CRUISER (RM1071U)
TERMINALS OF ECM
Each ECM terminals standard normal voltage is shown in the table below. In the table, first follow the informa-
tion under ºConditionº.
Look under ºSymbols (Terminals No.)º for the terminals to be inspected.
The standard normal voltage between the terminals is shown under ºSTD Voltageº.
Use the illustration above as a reference for the ECM terminals.
Symbols (Terminals No.)Wiring ColorConditionSTD Voltage
BATT (E9-3) - E1 (E7-1)B-R - BRAl9t 14V+BM (E8-6) - E1 (E7-1)Y-B - BRAlways9 to 14 V
IGSW (E9-9) - E1 (E7-1)B-R - BRIG it h ON9t 14V+B (E9-1) - E1 (E7-1)B-Y - BRIG switch ON9 to 14 V
MREL (E9-8) - E1 (E7-1)B-W - BRIG switch ON9 to 14 V
VC (E5-18) - E2 (E5-28)L-R - BR-WIG switch ON4.5 to 5.5 V
VG (E5-30) - E2G (E5-29)L-Y - G-WIdling, P or N position, A/C switch OFF0.5 to 3.0 V
THA (E5-20) - E2 (E5-28)Y-B - BR-WIdling, Intake air temp. 20°C (68°F)0.5 to 3.4 V
THW (E5-19) - E2 (E5-28)G-B - BR-WIdling, Engine coolant temp. 80°C (176°F)0.2 to 1.0 V
VTA1 (E5 21) E2 (E5 28)R Y BR WIG switch ON, Accelerator pedal released0.5 to 1.2 VVTA1 (E5-21) - E2 (E5-28)R-Y - BR-WIG switch ON, Accelerator pedal depressed3.2 to 4.8 V
VTA2 (E5 31) E2 (E5 28)Y B BR WIG switch ON, Accelerator pedal released2.0 to 3.1 VVTA2 (E5-31) - E2 (E5-28)Y-B - BR-WIG switch ON, Accelerator pedal depressed4.7 to 5.1 V
VPA (E9 22) E2 (E5 28)RBRWIG switch ON, Accelerator pedal released0.3 to 0.9 VVPA (E9-22) - E2 (E5-28)R - BR-WIG switch ON, Accelerator pedal depressed3.2 to 4.8 V
VPA2 (E9 23) E2 (E5 28)R B BR WIG switch ON, Accelerator pedal released1.8 to 2.7 VVPA2 (E9-23) - E2 (E5-28)R-B - BR-WIG switch ON, Accelerator pedal depressed4.7 to 5.1 V
VCPA (E9-26) - EPA (E9-28)L-R - BR-WIG switch ON4.5 to 5.5 V
VCP2 (E9-27) - EPA2 (E9-29)W - W-RIG switch ON4.5 to 5.5 V
OX1A (E6-23) - E1 (E7-1)
OX1B (E6-29) - E1 (E7-1)B - BR
B - BRMaintain engine speed at 2,500 rpm for 2 minutes after warming
upPulse generation
(See page DI-215)
OX2A (E6-22) - E1 (E7-1)
OX2B (E6-21) - E1 (E7-1)W - BR
W - BRMaintain engine speed at 2,500 rpm for 2 minutes after warming
upPulse generation
(See page DI-215)
HT1A (E6-4) - E1 (E7-1)
HT1B
(E6-5) - E1 (E7-1)
R - BR
L - BRIdlingBelow 3.0 VHT1B (E6-5) - E1 (E7-1)
HT2A (E6-33) - E1 (E7-1)
HT2B (E6-25) - E1 (E7-1)
L -BR
Y - BR
R - B - BRIG switch ON9 to 14 V

EM0E9-15
A05111
Engine Mounting Bracket
Oil Pump
Crankshaft
Front Oil
Seal
Crankshaft Position
Sensor Connector
No.1 Oil Pan
Drain Plug
 Non-reusable part

Precoated partEngine Wire
Oil StrainerEngine
Mounting
BracketStarter
Cable
Knock
Sensor 2
Connector Knock
Sensor 1Knock
Sensor 2
Engine Coolant Drain UnionStarter
No.2 Oil Pan Oil Pan Baffle Platex 8 Water Pump
 Gasket  O-Ring
Engine
Wire
Engine
Wire
CoverKnock
Sensor 1
Connector Engine Coolant
Drain Union
45 (450, 33)
36 (370, 27)
30.5 (310, 22)
15.5 (160, 11)
28 (290, 31)
x 5
Oil Pressure
Sender Gauge
Connector
7.5 (80, 66 in.´lbf)
7.5 (80, 66 in.´lbf)
7.5 (80, 66 in.´lbf)
N´m (kgf´cm, ft´lbf) : Specified torque 


x 20
Ground
Cable
Clamp
Engine Wire
Protector
 Tape
28 (290, 31)
 Gasket
7.5 (80, 66 in.´lbf)
28 (290, 31)
7.5 (80, 66 in.´lbf)
Water Bypass Pipe
Oil Cooler Pipe
Bracket for A/T
7.5 (80, 66 in.´lbf)
 O-Ring
Starter
Connector
 Gasket
EM-86
- ENGINE MECHANICALCYLINDER BLOCK
1659 Author
: Date
:
2004 LAND CRUISER (RM1071U)
CYLINDER BLOCK
COMPONENTS

EM0L6-03
A05112
Pull
Wire
Clamp
O-Ring
A05110
LH Side
A05109
RH Side EM-88
- ENGINE MECHANICALCYLINDER BLOCK
1661 Author
: Date
:
2004 LAND CRUISER (RM1071U)
DISASSEMBLY
1. INSTALL ENGINE TO ENGINE STAND
2. REMOVE TIMING BELT AND PULLEYS
(See page EM-15)
3. REMOVE CYLINDER HEAD (See page EM-35)
4. REMOVE WATER BYPASS PIPE
(a) Disconnect the wire clamp (for knock sensor 1, 2) from the
bracket of the water bypass pipe.
(b) Remove the bolt.
(c) Pull out the water bypass pipe from the water pump.
(d) Remove the O-ring from the water bypass pipe.
5. REMOVE STARTER (See page ST-5)
6. REMOVE KNOCK SENSORS (See page SF-55)
7. DISCONNECT ENGINE WIRE FROM LH SIDE OF CYL-
INDER BLOCK
(a) Remove the 2 bolts and the engine wire cover from the LH
side of the cylinder block.
(b) Remove the bolt, disconnect the bracket on the engine
wire from the cylinder block.
8. DISCONNECT ENGINE WIRE FROM RH SIDE OF CYL-
INDER BLOCK
Remove the 2 bolts, and disconnect the 2 brackets on the en-
gine wire from the cylinder block.
9. REMOVE OIL COOLER PIPE BRACKET FOR A/T
Remove the bolt and bracket.
10. REMOVE ENGINE MOUNTING BRACKETS
Remove the 4 bolts and the mounting bracket. Remove the 2
mounting brackets
11. REMOVE WATER PUMP (See page CO-6)
12. REMOVE NO.2 OIL PAN (See page LU-8)
13. REMOVE OIL PAN BAFFLE PLATE
14. REMOVE NO.1 OIL PAN (See page LU-8)
15. REMOVE OIL STRAINER
16. REMOVE OIL PUMP (See page LU-8)
17. REMOVE ENGINE COOLANT DRAIN UNIONS
Remove the 2 drain unions.