low oil pressure TOYOTA LAND CRUISER 1998 Factory User Guide

- DIAGNOSTICSAUTOMATIC TRANSMISSION
DI-367
560 Author
: Date
:
6. DEFINITION OF TERMS
TermDefinition
Monitor descriptionDescription of what the ECM monitors and how it detects malfunctions (monitoring purpose and its details).
Related DTCsDiagnostic code
Typical enabling condition
Preconditions that allow the ECM to detect malfunctions.
With all preconditions satisfied, the ECM sets the DTC when the monitored value(s) exceeds the malfunction
threshold(s).
Sequence of operation
The priority order that is applied to monitoring, if multiple sensors and components are used to detect the malfunc-
tion.
While another sensor is being monitored, the next sensor or component will not be monitored until the previous
monitoring has concluded.
Required sensor/compo-
nentsThe sensors and components that are used by the ECM to detect malfunctions.
Frequency of operation
The number of times that the ECM checks for malfunctions per driving cycle.
ºOnce per driving cycleº means that the ECM detects malfunction only one time during a single driving cycle.
ºContinuousº means that the ECM detects malfunction every time when enabling condition is met.
DurationThe minimum time that the ECM must sense a continuous deviation in the monitored value(s) before setting a
DTC. This timing begins after the ºtypical enabling conditionsº are met.
Malfunction thresholdsBeyond this value, the ECM will conclude that there is a malfunction and set a DTC.
MIL operation
MIL illumination timing after a defect is detected.
ºImmediatelyº means that the ECM illuminates MIL the instant the ECM determines that there is a malfunction.
º2 driving cycleº means that the ECM illuminates MIL if the same malfunction is detected again in the 2nd driving
cycle.
7. TOYOTA/LEXUS PART AND SYSTEM NAME LIST
This reference list indicates the part names used in this manual along with their definitions.
TOYOTA/LEXUS nameDefinition
Toyota HCAC system, Hydrocarbon adsorptive Catalyst
(HCAC) system, HC adsorptive three-way catalystHC adsorptive three-way catalytic converter
Variable Valve Timing sensor, VVT sensorCamshaft position sensor
Variable valve timing system, VVT systemCamshaft timing control system
Camshaft timing oil control valve, Oil control valve OCV,
VVT, VSVCamshaft timing oil control valve
Variable timing and lift, VVTLCamshaft timing and lift control
Crankshaft position sensor ºAºCrankshaft position sensor
Engine speed sensorCrankshaft position sensor
THAIntake air temperature
Knock control moduleEngine knock control module
Knock sensorEngine knock sensor
Mass or volume air flow circuitMass air flow sensor circuit
Vacuum sensorManifold air pressure sensor
Internal control module, Control module, Engine control
ECU, PCMPower train control module
FC idleDeceleration fuel cut
Idle air control valveIdle speed control
VSV for CCV, Canister close valve VSV for canister controlEvaporative emissions canister vent valve
VSV for EVAP, Vacuum switching valve assembly No. 1,
EVAP VAV, Purge VSVEvaporative emissions canister purge valve
VSV for pressure switching valve, Bypass VSVEvaporative emission pressure switching valve
Vapor pressure sensor, EVAP pressure sensor, Evaporative
emission control system pressure sensorFuel tank pressure sensor
Charcoal canisterEvaporative emissions canister
ORVR systemOn-boad refueling vapor recovery system
Intake manifold runner controlIntake manifold tuning system
Intake manifold runner valve, IMRV, IACV (runner valve)Intake manifold tuning valve
Intake control VSVIntake manifold tuning solenoid valve

D12745
SST
SST
DI-378
- DIAGNOSTICSAUTOMATIC TRANSMISSION
571 Author
: Date
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15. HYDRAULIC TEST
Measure the line pressure.
NOTICE:

Do the test at normal operation fluid temperature 70
to 80°C (158 to 176°F).

The line pressure test should always be carried out in
pairs. One technician should observe the conditions
of wheels or wheel stoppers outside the vehicle while
the other is doing the test.

Be careful to prevent SST's hose from interfering with
the exhaust pipe.

This check must be conducted after checking and ad-
justing engine.

Perform under condition that A/C is OFF.

When conducting stall test, do not continue more
than 10 seconds.
(1) Warm up the ATF.
(2) Remove the test plug on the transmission case cen-
ter right side and connect SST.
SST 09992-00095 (09992-00231, 09992-00271)
(3) Fully apply the parking brake and chock the 4
wheels.
(4) Start the engine and check idling speed.
(5) Keep your left foot pressing firmly on the brake ped-
al and shift into D position.
(6) Measure the line pressure when the engine is idling.
(7) Depress the accelerator pedal all the way down.
Quickly read the highest line pressure when engine
speed reaches stall speed.
(8) In the same manner, do the test in R position.
Specified line pressure:
ConditionD position kPa (kgf/cm2
, psi)R position kPa (kgf/cm2, psi)
Idling362 to 420 (3.7 to 4.2, 53 to 59)500 to 580 (5.1 to 5.9, 73 to 84)
Stall1,360 to 1,460 (13.8 to 14.9, 196 to 212)1,295 to 1,415 (13.2 to 14.4, 188 to 205)
Evaluation
ProblemPossible cause
If the measured value at all positions are higher
Shift solenoid valve SLT defective

Regulator valve defective
If the measured value at all positions are lower

Shift solenoid valve SLT defective

Regulator valve defective

Oil pump defective
If pressure is low in the D position only
D position circuit fluid leakage

Clutch No. 1 (C
1) defective
If pressure is low in the R position only

R position circuit fluid leakage

Clutch No. 3 (C
3) defective

Brake No. 4 (B
4) defective

DI-40
- DIAGNOSTICSENGINE
233 Author
: Date
:
2004 LAND CRUISER (RM1071U)P0230
(DI-162)
Fuel Pump Primary Circuit

Open or short in fuel pump relay circuit

Fuel pump relay

Circuit opening relay

Fuel pump

ECM
-
P0300
(DI-167)Random/Multiple Cylinder Misfire
Detected*2
P0301
(DI-167)Cylinder 1 Misfire Detected

Open or short in engine wire
*2
P0302
(DI-167)Cylinder 2 Misfire Detected

Open or short in engine wire

Connector connection

Vacuum hose connection
*2
P0303
(DI-167)Cylinder 3 Misfire Detected

Vacuum hose connection

Ignition system

Injector*2
P0304
(DI-167)Cylinder 4 Misfire Detected

Fuel pressure

Mass air flow meter

Engine coolant temperature sensor
*2
P0305
(DI-167)Cylinder 5 Misfire Detected

Engine coolant temperature sensor

Compression pressure

Valve clearance
*2
P0306
(DI-167)Cylinder 6 Misfire Detected

Valve clearance

Valve timing

PCV piping*2
P0307
(DI-167)Cylinder 7 Misfire Detected

ECM
*2
P0308
(DI-167)Cylinder 8 Misfire Detected*2
P0325
(DI-186)Knock Sensor 1 Circuit (Bank 1
or Single Sensor)
Open or short in knock sensor 1 circuit

Knock sensor 1 (looseness)

ECM

P0330
(DI-186)Knock Sensor 2 Circuit (Bank 2)

Open or short in knock sensor 2 circuit

Knock sensor 2 (looseness)

ECM

P0335
(DI-191)Crankshaft Position Sensor ºAº
Circuit

Open or short in crankshaft position sensor circuit

Crankshaft position sensor

Signal plate

ECM

P0339
(DI-191)Crankshaft Position Sensor ºAº
Circuit Intermittent

Open or short in crankshaft position sensor circuit

Crankshaft position sensor

Signal plate

ECM
-
P0340
(DI-197)Camshaft Position Sensor ºAº
Circuit (Bank 1 or Single Sensor)
Open or short in camshaft position sensor circuit

Camshaft position sensor
P0341
(DI-197)Camshaft Position Sensor ºAº
Circuit Range/Performance
(Bank 1 or Single Sensor)

Camshaft osition sensor

LH camshaft timing pulley

Jumping teeth of timing belt

ECM

P0351
(DI-202)Ignition Coil ºAº Primary/Second-
ary Circuit

Open or short in IGF 1 and IGT 1 circuit from No. 1 ignition coil
with igniter to ECM

No. 1 ignition coil with igniter

Ignition system

ECM

P0352
(DI-202)Ignition Coil ºBº Primary/Second-
ary Circuit

Open or short in IGF 2 and IGT 2 circuit from No. 2 ignition coil
with igniter to ECM

No. 2 ignition coil with igniter

Ignition system

ECM


- DIAGNOSTICSENGINE
DI-41
234 Author
: Date
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2004 LAND CRUISER (RM1071U)P0353
(DI-202)
Ignition Coil ºCº Primary/Second-
ary Circuit

Open or short in IGF 2 and IGT 3 circuit from No. 3 ignition
coil with igniter to ECM

No. 3 ignition coil with igniter

Ignition system

ECM

P0354
(DI-202)Ignition Coil ºDº Primary/Second-
ary Circuit

Open or short in IGF 1 and IGT 4 circuit from No. 4 ignition coil
with igniter to ECM

No. 4 ignition coil with igniter

Ignition system

ECM

P0355
(DI-202)Ignition Coil ºEº Primary/Second-
ary Circuit

Open or short in IGF 2 and IGT 5 circuit from No. 5 ignition coil
with igniter to ECM

No. 5 ignition coil with igniter

Ignition system

ECM

P0356
(DI-202)Ignition Coil ºFº Primary/Second-
ary Circuit

Open or short in IGF 1 and IGT 6 circuit from No. 6 ignition coil
with igniter to ECM

No. 6 ignition coil with igniter

Ignition system

ECM

P0357
(DI-202)Ignition Coil ºGº Primary/Second-
ary Circuit

Open or short in IGF 1 and IGT 7 circuit from No. 7 ignition coil
with igniter to ECM

No. 7 ignition coil with igniter

Ignition system

ECM

P0358
(DI-202)Ignition Coil ºHº Primary/Second-
ary Circuit

Open or short in IGF 2 and IGT 8 circuit from No. 8 ignition coil
with igniter to ECM

No. 8 ignition coil with igniter

Ignition system

ECM

P0420
(DI-215)Catalyst System Efficiency Be-
low Threshold (Bank 1)
Gas leakage on exhaust system

Heated oxygen sensor (bank 1 sensor 1, 2)

Three-way catalytic converter

P0430
(DI-215)Catalyst System Efficiency Be-
low Threshold (Bank 2)
Gas leakage on exhaust system

Heated oxygen sensor (bank 2 sensor 1, 2)

Three-way catalytic converter

P0441
(DI-222)Evaporative Emission Control
System Incorrect Purge Flow

Vacuum hose cracks, holed, blocked, damaged or discon-
nected ((1), (2), (3), (4), (5), (6), (7), (8) and (9) in Fig. 1)

Fuel tank cap incorrectly installed

Fuel tank cap cracked or damaged

Open or short in vapor pressure sensor circuit

Vapor pressure sensor

Open or short in VSV circuit for EVAP

EVAP VSV

Open or short in VSV circuit for CCV

CCV

Open or short in VSV circuit for pressure switching valve

Pressure switching valve

Fuel tank cracked, holed or damaged

Charcoal canister cracked, holed or damaged

ECM


DI1L5-18
A21338
Fuel Pump Resister Knock Sensor 2
Heated Oxygen Sensor
(Bank 1 Sensor 1) Heated Oxygen Sensor
(Bank 2 Sensor 1)VSV for EVAP
Combination Meter
Ignition Coil with Igniter
ECMKnock Sensor 1
Injector
Throttle Control
Motor and Sensor
Mass Air Flow Meter
Engine Coolant
Temperature Sensor
Camshaft
Position Sensor
Crankshaft
Position Sensor
VSV for CCV
Park/neutral Position Switch DLC3
Vapor Pressure Sensor VSV for
Pressure Switching Valve
Accelerator Pedal Assembly
(Accelerator Pedal Position Sensor)
Cowl Side J/B LH:

STOP Fuse

EFI or ECD No. 2 Fuse
Engine Room R/B and J/B:

Circuit Opening Relay

Fuel Pump Relay

EFI or ECD Relay

STARTER Relay

EFI or ECD No. 1 Fuse

ECTS Fuse
- DIAGNOSTICSENGINE
DI-45
238 Author
: Date
:
2004 LAND CRUISER (RM1071U)
PARTS LOCATION

DI-18
- DIAGNOSTICSENGINE
211 Author
: Date
:
TC/TE1
[Test Details]
Connect the TC and TE1.
ON or OFFSwitch to the same state as
the connection between
terminal TC and TE1.
FC IDL PROHBT
[Test Details]
Control the idle fuel cut prohibit.
ON or OFF
-
9. DEFINITION OF TERMS
TermDefinition
Monitor descriptionDescription of what the ECM monitors and how it detects malfunctions (monitoring purpose and its details).
Related DTCsDiagnostic code
Typical enabling condition
Preconditions that allow the ECM to detect malfunctions.
With all preconditions satisfied, the ECM sets the DTC when the monitored value(s) exceeds the malfunction
threshold(s).
Sequence of operation
The priority order that is applied to monitoring, if multiple sensors and components are used to detect the malfunc-
tion.
When a sensor is being monitored, the next sensor or component will not be monitored until the sensor monitoring
is finished.
Required sensor/compo-
nentsThe sensors and components that are used by the ECM to detect malfunctions.
Frequency of operation
The number of times that the ECM checks for malfunctions per driving cycle.
ºOnce per driving cycleº means that the ECM detects the malfunction only one time during a single driving cycle.
ºContinuousº means that the ECM detects malfunction every time an enabling condition is met.
DurationThe minimum time that the ECM must sense a continuous deviation in the monitored value(s) before setting a
DTC. This timing begins after the ºtypical enabling conditionsº are met.
Malfunction thresholdsBeyond this value, the ECM will conclude that there is a malfunction and set a DTC.
MIL operation
MIL illumination timing after a defect is detected.
ºImmediatelyº means that the ECM illuminates MIL the instant the ECM determines that there is a malfunction.
º2 driving cycleº means that the ECM illuminates MIL if the same malfunction is detected again in the 2nd driving
cycle.
10. TOYOTA/LEXUS PART AND SYSTEM NAME LIST
This reference list indicates the part names used in this manual along with their definitions.
TOYOTA/LEXUS nameDefinition
Toyota HCAC system, Hydro-carbon Adsorptive Catalyst
(HCAC) system, HC adsorptive three-way catalystHC adsorptive three-way catalytic converter
Variable Valve Timing sensor, VVT sensorCamshaft position sensor
Variable valve timing system, VVT systemCamshaft timing control system
Camshaft timing oil control valve, Oil control valve, OCV,
VVT, VSVCamshaft timing oil control valve
Variable timing and lift, VVTLCamshaft timing and lift control
Crankshaft position sensor ºAºCrankshaft position sensor
Engine speed sensorCrankshaft position sensor
THAIntake air temperature
Knock control moduleEngine knock control module
Knock sensorEngine knock sensor
Mass or volume air flow circuitMass air flow sensor circuit
Vacuum sensorManifold air pressure sensor
Internal control module, Control module, Engine control
ECU, PCMPower train control module
FC idleDeceleration fuel cut

EM0KR-09
A04458
Compression
Gauge
- ENGINE MECHANICALCOMPRESSION
EM-3
1576 Author
: Date
:
2004 LAND CRUISER (RM1071U)
COMPRESSION
INSPECTION
HINT:
If there is a lack of power, excessive oil consumption or poor fuel
economy, measure the compression pressure.
1. WARM UP AND STOP ENGINE
Allow the engine to warm up to the normal operating tempera-
ture.
2. REMOVE SPARK PLUGS
(See page IG-1)
3. CHECK CYLINDER COMPRESSION PRESSURE
(a) Insert a compression gauge into the spark plug hole.
(b) Fully open the throttle.
(c) While cranking the engine, measure the compression
pressure.
HINT:
Always use a fully charged battery to obtain the engine speed
at 250 rpm or more.
(d) Repeat steps (a) to (c) for each cylinder.
NOTICE:
This measurement must be done as quickly as possible.
Compression pressure:
1,324 kPa (13.5 kgf/cm
2, 192 psi) or more
Minimum pressure:
981 kPa (10.0 kgf/cm
2, 142 psi)
Difference between each cylinder:
98 kPa (1.0 kgf/cm
2, 14 psi) or less
(e) If the cylinder compression in one or more cylinders is
lower than the specification, pour a small amount of en-
gine oil into the cylinder through the spark plug hole and
repeat steps (a) to (c) for the cylinders.

If adding oil helps the compression, chances are
that the piston rings and/or cylinder bore are worn
or damage.

If the pressure stays low, a valve may be sticking or
the seating is improper, or there may be leakage
past the gasket.
4. REINSTALL SPARK PLUGS
(See page IG-1)

EM0L2-07
A03194
A03193
EM6323
EM6324
P21861
- ENGINE MECHANICALCYLINDER HEAD
EM-45
1618 Author
: Date
:
2004 LAND CRUISER (RM1071U)
INSPECTION
1. CLEAN TOP SURFACES OF PISTONS AND
CYLINDER BLOCK
(a) Turn the crankshaft, and bring each piston to top dead
center (TDC). Using a gasket scraper, remove all the car-
bon from the piston top surface.
(b) Using a gasket scraper, remove all the gasket material
from the cylinder block surface.
(c) Using compressed air, blow carbon and oil from the bolt
holes.
CAUTION:
Protect your eyes when using high pressure compressed
air.
2. REMOVE GASKET MATERIAL
Using a gasket scraper, remove all the gasket material from the
cylinder block contact surface.
NOTICE:
Be careful not to scratch the cylinder block contact sur-
face.
3. CLEAN COMBUSTION CHAMBERS
Using a wire brush, remove all the carbon from the combustion
chambers.
NOTICE:
Be careful not to scratch the cylinder block contact sur-
face.
4. CLEAN VALVE GUIDE BUSHINGS
Using a valve guide bushing brush and solvent, clean all the
guide bushings.

A05516
A05517
A05564
EM-38
- ENGINE MECHANICALCYLINDER HEAD
1611 Author
: Date
:
2004 LAND CRUISER (RM1071U)
14. REMOVE WATER INLET AND INLET HOUSING AS-
SEMBLY (See page CO-6)
15. REMOVE FRONT WATER BYPASS JOINT
Remove the 4 nuts, the water bypass joint and the 2 gaskets.
16. REMOVE REAR WATER BYPASS JOINT
Remove the 4 nuts, the water bypass joint and the 2 gaskets.
17. REMOVE ENGINE HANGERS
18. REMOVE OIL DIPSTICK AND GUIDE FOR A/T
19. REMOVE CYLINDER HEAD COVERS
Remove the 18 bolts, the 18 seal washers, the cylinder head
cover and gasket. Remove the 2 cylinder head covers.
20. IF NECESSARY, REMOVE SEMI-CIRCULAR PLUGS
AND CAMSHAFT HOUSING PLUGS
21. REMOVE CAMSHAFTS
NOTICE:
Since the thrust clearance of the camshaft is small, the
camshaft must be kept level while it is being removed.
Otherwise, excessive pressure is put on the cylinder head
journal thrust, causing a burr on the journal and damage on
the camshaft. To avoid this, follow the steps below.

A04451
Turn
A04452
Tension
Turn
A04453
Turn
P20636
1.27 mm
Hexagon
Wrench
A04454
1.27 mm
Hexagon
Wrench
EM-24
- ENGINE MECHANICALTIMING BELT
1597 Author
: Date
:
2004 LAND CRUISER (RM1071U)
12. CONNECT TIMING BELT TO LH CAMSHAFT
TIMING PULLEY
(a) Remove any oil or water on the LH camshaft timing pulley,
and clean it up.
NOTICE:
Only wipe the pulleys; do not use any cleansing agent.
(b) Turn the LH camshaft timing pulley. Align the installation
mark on the timing belt with the timing mark of the cam-
shaft timing pulley, and hang the timing belt on the LH
camshaft timing pulley.
(c) Turn the LH camshaft timing pulley counterclockwise until
there is tension between the crankshaft timing pulley and
the LH camshaft timing pulley.
13. CONNECT TIMING BELT TO RH CAMSHAFT
TIMING PULLEY
(a) Remove any oil or water on the RH camshaft timing pulley
and water pump pulley, and clean them up.
NOTICE:
Only wipe the pulleys; do not use any cleansing agent.
(b) Turn the RH camshaft timing pulley. Align the installation
mark on the timing belt with the timing mark of the cam-
shaft timing pulley, and hang the timing belt on the RH
camshaft timing pulley.
14. SET TIMING BELT TENSIONER
(a) Using a press, slowly press in the push rod using 981 -
9,807 N (100 - 1,000 kgf, 220 - 2,205 lbf) of pressure.
(b) Align the holes of the push rod and the housing, pass a
1.27 mm (0.050 in.) hexagon wrench through the holes to
keep the setting position of the push rod.
(c) Release the press.
(d) Install the dust boot to the belt tensioner.
15. INSTALL TIMING BELT TENSIONER
(a) Temporarily install the belt tensioner with the 2 bolts.
(b) Alternately tighten the 2 bolts.
Torque: 26 N´m (270 kgf´cm, 19 ft´lbf)
(c) Using pliers, remove the 1.27 mm (0.050 in.) hexagon
wrench from the belt tensioner.