TOYOTA LAND CRUISER 1998 Factory Repair Manual

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.

Thermostat malfunction
VAL. . . . . . . . . . . . . . 119.375C
LMT. . . . . . . . . . . . . . . 75.000C
TLT. . . . . . . . . . . . . . . . . . . . . . 1
[HELP] to notice
[EXIT] to return
A20450
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(7) Select the component (Label) and press ENTER.
The accuracy test value appears when the monitor
result is either PASS or FAIL.
VAL The test value
LMT: The test limit
TLT: The test limit type. Either 0 or 1 is displayed.
(8) If TLT is 0, the component is malfunctioning when
the test value is higher than the test limit. If TLT is
1, the component is malfunctioning when the test
value is lower than the test limit.
(9) Compare the test value with the test limit. The test
value is usually significantly higher or lower than the
test limit. If the test value is on the borderline of the
test limit, there is a potential malfunction in the com-
ponent.
HINT:
The monitor result might on rare occasions be PASS even if the
MIL is illuminated. This indicates the system malfunctioned on
a previous driving cycle. This might be caused by an intermit-
tent problem.

DI1L9-13
DI-48
- DIAGNOSTICSENGINE
241 Author
: Date
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2004 LAND CRUISER (RM1071U)
PROBLEM SYMPTOMS TABLE
SymptomSuspect AreaSee page
Engine does not crank (Does not start)
16.Starter
17.Starter relay
18.Park/neutral position switchST-16
ST-18
DI-402
No initial combustion (Does not start)
1. ECM power source circuit
2. Fuel pump control circuit
3. Engine control module (ECM)DI-345
DI-350
IN-36
No complete combustion (Does not start)1. Fuel pump control circuitDI-350
Engine cranks normally but difficult to start
1. Starter signal circuit
2. Fuel pump control circuit
3. CompressionDI-336
DI-350
EM-3
Difficult to start with cold engine1. Starter signal circuit
2. Fuel pump control circuitDI-336
DI-350
Difficult to start with hot engine1. Starter signal circuit
2. Fuel pump control circuitDI-336
DI-350
High engine idle speed (Poor idling)1. A/C switch circuit
2. ECM power source circuit-
DI-345
Low engine idle speed (Poor idling)1. A/C switch circuit
2. Fuel pump control circuit-
DI-350
Rough idling (Poor idling)1. Compression
2. Fuel pump control circuitEM-3
DI-350
Hunting (Poor idling)1. ECM power source circuit
2. Fuel pump control circuitDI-345
DI-350
Hesitation/Poor acceleration (Poor driveability)1. Fuel pump control circuit
2. A/T faultyDI-350
DI-396
Surging (Poor driveability)1. Fuel pump control circuitDI-350
Engine stalls soon after starting1. Fuel pump control circuitDI-350
Engine stalls during A/C operation1. A/C switch circuit
2. Engine control module (ECM)-
IN-36
Unable to refuel/Difficult to refuel1. ORVR system-

DIC21-01
DI-30
- DIAGNOSTICSENGINE
223 Author
: Date
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2004 LAND CRUISER (RM1071U)
READINESS MONITOR DRIVE PATTERN
1. PURPOSE OF THE READINESS TESTS

The On-Board Diagnostic (OBD II) system is designed to monitor the performance of emission-re-
lated components and report any detected abnormalities in the form of Diagnostic Trouble Codes
(DTCs). Since the various components need to be monitored during different driving conditions, the
OBD II system is designed to run separate monitoring programs called Readiness Monitors. Many
state Inspection and Maintenance (I/M) programs require that vehicles complete their Readiness Mon-
itors prior to beginning an emissions test.

The current status of the Readiness Monitors can be seen by using the hand-held tester with version
9.0 software (or newer), or a generic OBD II Scan tool.

To view the Readiness Monitor status using the hand-held tester, select ºMonitor Statusº from the En-
hanced OBD II Menu.

A status of ºcompleteº indicates that the necessary conditions have been met to run the performance
tests for the related Readiness Monitor.

The Readiness Monitor will be reset to ºincompleteº if:

ECM has lost power (battery or fuse).

DTCs have been cleared.

The conditions for running the Readiness Monitor have not been met.

In the event that any Readiness Monitor shows ºincomplete,º follow the appropriate Readiness Monitor
Drive Pattern to active the monitor and change the readiness status to ºcomplete.º
CAUTION:
Strictly observe of posted speed limits, traffic laws, and road conditions when performing these
drive patterns.
NOTICE:
These drive patterns represent the fastest method to satisfy all necessary conditions which allow
the specific readiness monitor to complete.
In the event that the drive pattern must be interrupted (possibly due to traffic conditions or other fac-
tors) the drive pattern can be resumed, and in most cases, the readiness monitor will still set to ºcom-
pleteº.
To ensure rapid completion of readiness monitors, avoid sudden changes in vehicle load and speed
(driving up and down hills and/or sudden acceleration).

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.

A18910
Idling
Ignition OFF
Warmed up Soak 15 to 50 min.
(When the readiness code or diagnostic code
is set, this test is completed.) 3,000 rpm
10 sec. DI-32
- DIAGNOSTICSENGINE
225 Author
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2004 LAND CRUISER (RM1071U)
3. EVAP MONITOR (VACUUM PRESSURE MONITOR)
NOTICE:
A cold soak must be performed prior to conducting the drive pattern to complete the Internal Pres-
sure Readiness Monitor.
(a) Cold Soak 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
(b) Cold Soak Procedure
Let the vehicle cold soak for 8 hours or until the difference between IAT and ECT becomes 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)
4. EVAP MONITOR (VACUUM PRESSURE MONITOR) (CONTINUED)

- DIAGNOSTICSENGINE
DI-33
226 Author
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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.

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
- DIAGNOSTICSENGINE
227 Author
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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).

A18915
Idling
Ignition OFF(40 km/h)25 mph
Over 2 minutes Over 500 seconds
- DIAGNOSTICSENGINE
DI-35
228 Author
: Date
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2004 LAND CRUISER (RM1071U)
6. OXYGEN SENSOR HEATER MONITOR
(a) Preconditions
The monitor will not run unless:

MIL is OFF
(b) Drive Pattern
(1) Connect the OBD II scan tool to the DLC3 to check monitor status and preconditions (refer to
step ºaº).
(2) Start the engine and allow it to idle for 500 seconds or more.
(3) Drive the vehicle at 25 mph (40 km/h) or more at least 2 minutes.
(4) Check the status of the readiness monitor on the scan tool display. If readiness status did not
switch to complete, ensure the preconditions are met, turn the ignition off and then repeat steps
(2) and (3).

DI1L7-17
A19624
E8 E7
E6 E5E9 DI-46
- DIAGNOSTICSENGINE
239 Author
: Date
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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