1998 TOYOTA LAND CRUISER sensor

- DIAGNOSTICSENGINE
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O2S B1 S2
Oxygen sensor output voltage of
the bank 1 sensor 2/
Min.: 0 V, Max.: 1.275 V
Driving 50 km/h (31 mph):
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 S2
Oxygen sensor output voltage of
the bank 2 sensor 2/
Min.: 0 V, Max.: 1.275 V
Driving 50 km/h (31 m h):
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.
SHORT FT #1Short term fuel trim of bank 1/
Min.: -100%, Max.: 100%0 ± 20%
This item is short-term fuel com-
pensation used to maintain air-fuel
ratio at stoichiometric air-fuel ratio
LONG FT #1Long term fuel trim of bank 1/
Min.: -100%, Max.: 100%0 ± 20%
This item is overall, long-term fuel
compensation that helps to main-
tain air-fuel ratio at stoichiometric
air-fuel ratio (steadies long term
deviations of short-term fuel trim
from central value)
TOTAL FT #1Total fuel trim of bank 1/
Min.: 0.5, Max.: 1.496Idling: 0.5 to 1.4-
SHORT FT #2Short term fuel trim of bank 2/
Min.: -100%, Max.: 100%0 ± 20%Same as SHORT FT #1
LONG FT #2Long term fuel trim of bank 2/
Min.: -100%, Max.: 100%0 ± 20%Same as LONG FT #1
TOTAL FT #2Total fuel trim of bank 2/
Min.: 0.5, Max.: 1.496Idling: 0.5 to 1.4-
O2FT B1 S1
Short term fuel trim associated
with the bank 1, sensor 1/
Min.: -100%, Max.: 100%
0 ± 20%Same as SHORT FT #1
O2FT B1 S2
Short term fuel trim associated
with the bank 1, sensor 2/
Min.: -100%, Max.: 100%
0 ± 20%Same as SHORT FT #2
O2FT B2 S1
Short term fuel trim associated
with the bank 2, sensor 1/
Min.: -100%, Max.: 100%
0 ± 20%Same as SHORT FT #1
O2FT B2 S2
Short term fuel trim associated
with the bank 2, sensor 2/
Min.: -100%, Max.: 100%
0 ± 20%Same as SHORT FT #2
O2 LR B1 S1
Response time of the O2 sensor
lean to rich (bank 1, sensor 1)/
Min.: 0 ms, Max.: 16,711 msIdling after warming up:
0 to 1,000 ms-
O2 LR B2 S1
Response time of the O2 sensor
lean to rich (bank 2, sensor 1)/
Min.: 0 ms, Max.: 16,711 msIdling after warming up:
0 to 1,000 ms-
O2 RL B1 S1
Response time of the O2 sensor
rich to lean (bank 1, sensor 1)/
Min.: 0 ms, Max.: 16,711 ms
Idling after warming up:
-
O2 RL B2 S1
Response time of the O2 sensor
rich to lean (bank 2, sensor 1)/
Min.: 0 ms, Max.: 16,711 ms
Idling after warming u:
0 to 1,000 ms
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DI-16
- DIAGNOSTICSENGINE
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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
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8. ACTIVE TEST
HINT:
Performing the ACTIVE TEST using the hand-held tester or the OBD II scan tool allows the relay, VSV, ac-
tuator and so on to operate without parts removal. Performing the ACTIVE TEST as a first step of trouble-
shooting is one method to shorten diagnostic time.
It is possible to display the DATA LIST during the ACTIVE TEST.
(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 or the OBD II scan tool.
(f) Enter the following menus: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST.
(g) According to the display on tester, perform the ºACTIVE TESTº.
ItemTest DetailsDiagnostic Note
INJ VOL
[Test Details]
Control the injection volume.
Min.: -12.5%, Max.: 24.8%
[Vehicle Condition]
Engine speed: 3,000 rpm or less.
All injectors are tested at
once.

Injection volume is gradual-
ly changed between -12.5
and 25%
A/F CONTROL
[Test Details]
Control injection volume
-12.5 or 25 % (change injection volume -12.5 % or 25 %)
[Vehicle Condition]
Engine speed: 3,000 rpm or less
Following A/F CONTROL
procedure enables techni-
cian to check and graph volt-
age outputs of both the A/F
sensor and heated oxygen
sensor
For displaying graph, enter
ºACTIVE TEST / A/F CON-
TROL / USER DATAº, select
ºAFS B1S1 and O2S B1S2º
by pressing ºYESº and push
ºENTERº. Then press ºF4º
FUEL PUMP / SPD
[Test Details]
Control the fuel pump speed.
ON or OFF
-
VVT CTRL B1
[Test Details]
Active VVT system (Bank 1)
ON or OFF
ON: Rough idle or engine
stall

OFF: Normal engine speed
VVT CTRL B2
[Test Details]
Active VVT system (Bank 2)
ON or OFF
ON: Rough idle or engine
stall

OFF: Normal engine speed
CAN CTRL VSV
[Test Details]
Activate the VSV for canister control.
ON or OFF
-
TANK BYPASS VSV
[Test Details]
Activate the VSV for tank bypass.
ON or OFF
-
A/C MAG CLUTCH
[Test Details]
Control the A/C magnet clutch.
ON or OFF
-
EVAP VSV (ALONE)
[Test Details]
Activate the VSV for EVAP control.
ON or OFF
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DI-18
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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
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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

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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 VSV, 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-board 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
AFSAir fuel ratio sensor
O2 sensorHeater oxygen sensor
Oxygen sensor pumping current circuitOxygen sensor output signal
Oxygen sensor reference ground circuitOxygen sensor signal ground
Accel position sensorAccelerator pedal position sensor
Throttle actuator control motor, Actuator control motor, Elec-
tronic throttle motor, Throttle control motorElectronic throttle actuator
Electronic throttle control system, Throttle actuator control
systemElectronic throttle control system
Throttle/pedal position sensor, Throttle/pedal position switch,
Throttle position sensor/switchThrottle position sensor
Turbo press sensorTurbocharger pressure sensor
Turbo VSVTurbocharger pressure control solenoid valve
P/S pressure switchPower-steering pressure switch
VSV for ACMActive control engine mount
Speed sensor, Vehicle speed sensor ºAº, Speed sensor for
skid control ECUVehicle speed sensor
ATF temperature sensor, Trans. fluid temp. sensor, ATF
temperature sensor ºAºTransmission fluid temperature sensor
Electronic controlled automatic transmission, ECTElectronically controlled automatic
Intermediate shaft speed sensor ºAºCounter gear speed sensor
Output speed sensorOutput shaft speed sensor
Input speed sensor, Input turbine speed sensor ºAº, Speed
sensor (NT), Turbine speed sensorInput turbine speed sensor
PNP switch, NSWPark/neutral position switch
Pressure control solenoidTransmission pressure control solenoid
Shift solenoidTransmission shift solenoid valve
Transmission control switch, Shift lock control unitShift lock control module
Engine immobiliser system, Immobiliser systemVehicle anti-theft system

01 BANK 1 - SENSOR 1O2 SENSOR TEST
02 BANK 1 - SENSOR 2
03 BANK 2 - SENSOR 1
04 BANK 2 - SENSOR 2
A21190
O2S TEST RESULT Screen DI-26
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12. O2S TEST RESULT
INTRODUCTION
The O2S TEST RESULT refers to the results of the engine con-
trol module (ECM) when it monitors the oxygen sensor (O2S),
and it can be read using the hand-held tester or the generic
OBD II scantool. Based on this, you can find the O2S's condi-
tions.
The ECM monitors the O2S in the various items. You can read
the monitor result (TEST DATA) of each monitor item using the
O2S TEST RESULT. However, the output value of the TEST
DATA is the latest ºsnapshotº value that is taken after monitor-
ing and therefore is not dynamic.
In this repair manual, the description of the O2S TEST RESULT
(for O2S related DTCs) are written in a table.
This table consists of 5 items:
(1) TEST ID (a code applied to each TEST DATA)
(2) Description of TEST DATA
(3) Conversion Factor (When Conversion Factor has a
value written in the table, multiply the TEST DATA
value appearing on the scan tool by the Conversion
Factor value. The result will be the required value.)
(4) Unit
(5) Standard Value
If the TEST DATA value appearing on the scan tool is out of the
standard value, the O2S is malfunctioning. If it is within the stan-
dard value, the O2S is functioning normally. However, if the val-
ue is on the borderline of the standard value, the O2S may mal-
function very soon.
HOW TO READ O2S TEST RESULT USING HAND-HELD
TESTER
(a) Connect the hand-held tester to the DLC3.
(b) On the tester screen, select the following menus: DIAG-
NOSIS/CARB OBDII/O2S TEST RESULT. A list of the
O2S equipped on the vehicle will be displayed.

MONITOR RESULT
CATALYST#1 B1 . INCMP
CATALYST#1 B2 . INCMP
O2S HEAT B1S1 . INCMP
O2S HEAT B1S2 . INCMP
O2S HEAT B2S1 . INCMP
O2S HEAT B2S2 . INCMP
THERMOSTAT . . . . . PASS
Press [ENTER] to
Select the Label .
A20449
DI-28
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13. CHECKING MONITOR STATUS
NOTICE:
The Monitor Status is not applicable to the heated oxygen
sensor (HO2S). The HO2S status can be checked with O2S
TEST RESULT.
(a) INTRODUCTION
The purpose of the monitor result (mode 6) is to allow ac-
cess to the results for on-board diagnostic monitoring
tests of specific components/systems that are not contin-
uously monitored. Examples are catalyst, EVAP and ther-
mostat.
The monitor result allows the OBD scan tool to display the
monitor status, test value and test limit. The monitor sta-
tus indicates whether the component is functioning nor-
mally or not (PASS or FAIL). The test value is the value
that was used to determine the monitor status. When the
test value is inside the test limit, the ECM determines the
component is functioning normally (PASS). If the test val-
ue is outside the test limit, the ECM determines the com-
ponent is malfunctioning (FAIL).
A problem in these components/systems can be found by
comparing the test value and test limit. The monitor result
information is included under MONITOR RESULTº in the
DTC sections.
(b) PROCEDURE
NOTICE:
The monitor result and test value are cleared when the igni-
tion switch is turned OFF.
(1) Connect the hand-held tester to the DLC3.
(2) Turn the ignition switch ON.
(3) Clear the DTCs.
(4) Run the vehicle in accordance with the applicable
drive pattern described in READINESS MONITOR
DRIVE PATTERN (see page DI-30).
(5) Select from the tester menus: DIAGNOSIS, EN-
HANCED OBD II, MONITOR INFO and MONITOR
RESULT. The monitor result appears after the com-
ponent name.
INCMP: The component has not been monitored
yet.
PASS: The component is functioning normally.
FAIL: The component is malfunctioning.
(6) Confirm that the component is set to either PASS or
FAIL.

A18913
(40 km/h)
Idling
Ignition OFF (over 900 rpm)25 mph
Over 2 min.
50 sec. Over 50 sec. 50 sec.Over 40 sec. 40 sec. 40 sec.
50 sec. Once Twice 3 times 10 times DI-34
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2004 LAND CRUISER (RM1071U)
5. OXYGEN SENSOR MONITOR (FRONT AND REAR O2S SYSTEM)
(a) Preconditions
The monitor will not run unless:

MIL is OFF
(b) Drive Pattern
(1) Connect the OBD II scan tool to DLC3 to check monitor status and preconditions (refer to step
ºaº).
(2) Start the engine and allow it to idle for 2 minutes or more.
(3) Drive the vehicle at 25 mph (40 km/h) or more for at least 50 seconds.
(4) Stop the vehicle and allow the engine to idle for 40 seconds or more.
(5) Perform steps (3) and (4) ten times.
(6) Check the status of the readiness monitor on the scan tool display. If readiness status did not
switch to complete, ensure preconditions are met, turn the ignition off and then repeat steps (1)
and (5).