1986 TOYOTA LAND CRUISER ignition

1
152 3 4 5 6 7 8
9 10 11 12
13 14
D11994OT+OT-
- DIAGNOSTICSAUTOMATIC TRANSMISSION
DI-413
606 Author
: Date
:
2004 LAND CRUISER (RM1071U)
INSPECTION PROCEDURE
HINT:
According to the DATA LIST displayed by the OBD ll scan tool or Hand-held tester, you can read the value
of the switch, sensor, actuator and so on without parts removal. Reading the DATA LIST as a first step of
troubleshooting is one method to shorten labor time.
(a) Warm up the engine.
(b) Turn the ignition switch OFF.
(c) Connect the OBD ll scan tool or Hand-held tester to the DLC3.
(d) Turn the ignition switch ON.
(e) Push the ºONº button of OBD ll scan tool or Hand-held tester.
(f) Select the item º/DIAGNOSIS/ENHANCED OBD ll/DATA LIST/ALL (or ATM)º.
(g) According to the display on tester, read the ºDATA LISTº.
ItemMeasurement Item/
Display (Range)Normal ConditionDiagnostic Note
AT FLUID TEMP
ATF Temp. Sensor No.1 Value/
min.: -40°C (-40°F)
max.: 215°C (419°F)80°C (176°F)
(After Stall Test)
If the value is º-40°C (-40°F)º or
º215°C (419°F)º, ATF temp. sen-
sor No. 1 circuit is opened or
shorted.
HINT:
When DTC P0712 is output and OBD ll scan tool or hand-held tester output is 150°C (302°F), there is a
short circuit.
Measure the resistance between THO1 (THO) and body ground.
Temperature DisplayedMalfunction
-40°C (-40°F)Open circuit
150°C (302°F) or moreShort circuit
1 Check transmission wire.
PREPARATION:
Disconnect the transmission wire connector from the transmis-
sion.
CHECK:
Measure the resistance between terminals OT+ and OT-.
OK:
79 W to 156 kW
CHECK:
Measure resistance between terminals OT+ and OT- of the
transmission wire connector and body ground.
OK:
Resistance: 1 MW or higher
NG Replace the transmission wire (ATF tempera-
ture sensor).
OK

DI-416
- DIAGNOSTICSAUTOMATIC TRANSMISSION
609 Author
: Date
:
2004 LAND CRUISER (RM1071U)
TYPICAL MALFUNCTION THRESHOLDS
Detection criteriaThreshold
ATF Temperature
Less than 10°C (50°F)
(ATF temperature = -10°C (14°F) at engine start)
(Conditions vary with ATF temperature at engine start)
COMPONENT OPERATING RANGE
ParameterStandard value
ATF temperature sensorAtmospheric temperature to approx. 130°C (266°F)
WIRING DIAGRAM
See page DI-410.
INSPECTION PROCEDURE
1 Check other DTCs output (in addition to DTC P0711).
PREPARATION:
(a) Warm up the engine.
(b) Turn the ignition switch off.
(c) Connect the OBD II scan tool or hand-held tester to the DLC3.
(d) Turn the ignition switch to the ON position.
(e) Push the ºONº button of the OBD II scan tool or the hand-held tester.
(f) Select the item ºDIAGNOSIS/ENHANCED OBD II/DTC INFO/CURRENT CODESº.
CHECK:
Read the DTCs using the OBD II scan tool or the hand-held tester.
RESULT:
Display (DTC output)Proceed to
Only ºP0711º is outputA
ºP0711º and other DTCsB
HINT:
If any other codes besides ºP0711º is output, perform the troubleshooting for those DTCs first.
B Go to relevant DTC chart (See page DI-389).
A

- DIAGNOSTICSAUTOMATIC TRANSMISSION
DI-455
648 Author
: Date
:
2004 LAND CRUISER (RM1071U) ECM selected gear
5th
Engine speed - Turbine speed (NE - NT)
(After transition from 4th to 5th gear)-Less than 150 rpm
Vehicle speed
(After transition from 4th to 5th gear)-Less than 100 km/h (62 mph)
TYPICAL MALFUNCTION THRESHOLDS
Detection criteriaThreshold
Both of the following conditions are met: Condition (A), and Condition (B), (C) or (D)
Condition (A)
Turbine speed/Output speed (NT/NO)
3.30 or more
and
7.50 or less
Condition (B)
Turbine speed/Output speed (NT/NO)
1.28 or more
and
1.53 or less
Condition (C)
Turbine speed - Output speed x 4th gear ratio
(NT - NO x 4th gear ratio)1,000 rpm or more
Condition (D)
Turbine speed - Output speed x 5th gear ratio
(NT - NO x 5th gear ratio)1,000 rpm or more
INSPECTION PROCEDURE
1 Check other DTCs output (in addition to DTC P0781).
PREPARATION:
(a) Warm up the engine.
(b) Turn the ignition switch off.
(c) Connect the OBD ll scan tool or hand-held tester to the DLC3.
(d) Turn the ignition switch to the ON position.
(e) Push the ºONº button of the OBD ll scan tool or the hand-held tester.
(f) Select the item ºDIAGNOSIS/ENHANCED OBD ll/DTC INFO/CURRENT CODESº.
CHECK:
Read the DTCs using the OBD ll scan tool or the hand-held tester.
RESULT:
Display (DTC output)Proceed to
Only ºP0781º is outputA
ºP0781º and other DTCsB
HINT:
If any other codes besides ºP0781º is output, perform the troubleshooting for those DTCs first.
B Go to relevant DTC chart (See page DI-389)
A

- DIAGNOSTICSAUTOMATIC TRANSMISSION
DI-457
650 Author
: Date
:
2004 LAND CRUISER (RM1071U)
DTC P0818 Driveline Disconnect Switch Input Circuit
CIRCUIT DESCRIPTION
The ECM detects the signal from the transfer neutral position switch.
This DTC indicates that the transfer neutral position switch remains ON.
DTC No.DTC Detecting ConditionTrouble Area
P0818
Transfer neutral position switch remains ON while vehicle run-
ning under conditions for 30 sec. (2-trip detection logic)

Vehicle speed is 25 km/h or more

Transfer shift position is H
Short in transfer neutral position switch circuit

Transfer neutral position switch

ECM
MONITOR DESCRIPTION
The ECM detects whether or not the transfer gear is in the neutral position by monitoring the signal from the
transfer neutral position switch.
If the ECM detects that the transfer-case is in neutral under the following conditions, the ECM will conclude
that there is a malfunction of the transfer-case neutral position switch:

Transfer-case neutral position switch indicates that the transfer-case is in neutral.

Transfer-case shifter is in the ºHº position.

The vehicle is traveling at 25 km/h (16 mph) or more.

The neutral switch has been ON for more than thirty seconds.
If all of the above conditions are detected, the ECM will conclude that there is a malfunction of the transfer-
case neutral position switch, illuminate the MIL and store the DTC.
MONITOR STRATEGY
Related DTCsP0818Transfer neutral position switch/Verify switch cycling
Rid /C tMainTransfer neutral position switchRequired sensors/ComponentsSubVehicle speed sensor
Frequency of operationContinuous
Duration30 sec.
MIL operation2 driving cycles
Sequence of operationNone
TYPICAL ENABLING CONDITIONS
ItSpecificationItemMinimumMaximum
The monitor will run whenever the follow-
ing DTCs are not present.See page DI-361
Vehicle speed25 km/h (16 mph) or more-
Transfer positionHigh
Ignition switch ON and time after OFF to
ON0.5 sec. or more-
TYPICAL MALFUNCTION THRESHOLDS
Detection criteriaThreshold
Transfer neutral switch signalON
DIB3E-02

D12765
ECM
L4 4
E8 EB1 6CJ/B No. 6
115 D5
Detection SW
(Transfer L Position)
J/B No. 3
ALT
II R-LB-L
1
26D31
R-LB-L
EB1B-L 3 11
IN2Ib2 14 6
R-L
R-L3
1
39 3E
3C
3Q
1 23
5 IG1 No. 3 RelayGAUGE2 Cowl Side J/B RH
Cowl Side J/B LHB-G
SB
J/B No. 2
Battery FL Block
1 1
F17 F16 B-G
B-G13937 77
2Q
2C2E
2E AM1I18
Ignition SW
AM1 IG12 4
B-R L-B DI-474
- DIAGNOSTICSAUTOMATIC TRANSMISSION
667 Author
: Date
:
2004 LAND CRUISER (RM1071U)
WIRING DIAGRAM

A04550
9 1011 12 13141516 12345678
DLC3 DI-362
- DIAGNOSTICSAUTOMATIC TRANSMISSION
555 Author
: Date
:
(b) Inspect the DLC3.
The vehicle's ECM uses ISO 9141-2 for communication.
The terminal arrangement of DLC3 complies with SAE
J1962 and matches the ISO 9141-2 format.
Tester connectionConditionSpecified condition
7 (Bus
Line) - 5 (Signal ground)During communicationPulse generation
4 (Chassis Ground) - BodyAlways1 W or less
5 (Signal Ground) - BodyAlways1 W or less
16 (B+) - BodyAlways9 to 14 V
HINT:
If your display shows UNABLE TO CONNECT TO VEHICLE
when you have connected the cable of the OBD II scan tool or
hand-held tester to the DLC3, turned the ignition switch ON
and operated the scan tool, there is a problem on the vehicle
side or tool side.

If the communication is normal when the tool is connected
to another vehicle, inspect the DLC3 on the original ve-
hicle.

If the communication is still impossible when the tool is
connected to another vehicle, the problem is probably in
the tool itself, so consult the Service Department listed in
the tool's instruction manual.
(c) Inspect the battery voltage.
Battery Voltage: 11 to 14 V
If voltage is below 11 V, recharge the battery before proceeding.
(d) Check the MIL.
(1) The MIL comes on when the ignition switch is turned
ON and the engine is not running.
HINT:
If the MIL does not light up, troubleshoot the combination meter
(See page BE-63).
(2) When the engine is started, the MIL should go off.
If the lamp remains on, it means that the diagnosis
system has detected a malfunction or abnormality
in the system.

F06425
Hand-held tester
DLC3
- DIAGNOSTICSAUTOMATIC TRANSMISSION
DI-363
556 Author
: Date
:
2. Normal Mode:
DTC CHECK
NOTICE:
Hand-held tester only:
When the diagnostic system is switched from the normal
mode to the check mode, all the DTCs and freeze frame
data recorded in the normal mode will be erased. So before
switching modes, always check the DTCs and freeze frame
data, and note them down.
(a) Checking DTCs using the OBD II scan tool or hand-held
tester.
(1) Connect the OBD II scan tool or hand-held tester
to DLC3.
(2) Turn the ignition switch ON.
(3) Use the OBD II scan tool or hand-held tester to
check the DTCs and freeze frame data and note
them down (For operating instructions, see the
OBD II scan tool's instruction book).
(4) See page DI-381 to confirm the details of the
DTCs.
NOTICE:
When simulating symptoms with an OBD II scan tool (ex-
cluding hand-held tester) to check the DTCs, use the nor-
mal mode. For codes on the DTCs chart subject to º2 trip
detection logicº, turn the ignition switch OFF after the
symptom is simulated once. Then repeat the simulation
process again. When the problem has been simulated
twice, the MIL is indicated on the instrument panel and
DTCs are recorded in the ECM.
(b) When using the OBD II scan tool or hand-held tester:
Clearing the DTCs.
(1) Connect the OBD II scan tool or hand-held tester
to DLC3.
(2) Turn the ignition switch ON.
(3) When operating an OBD II scan tool (complying
with SAE J1978) or hand-held tester to erase the
codes, the DTCs and freeze frame data will be
erased. (See the OBD II scan tool's instruction book
for operating instructions.)
(c) When not using the OBD II scan tool or hand-held tester:
Clearing the DTCs.
(1) Disconnecting the battery terminal or remove the
EFI and ETCS fuse from engine room J/B for 60 se-
conds or more.

F06425
Hand-held tester
DLC3
FI3605
ON
OFF
0.13 SecondFlashing
DI-364
- DIAGNOSTICSAUTOMATIC TRANSMISSION
557 Author
: Date
:
3. Check Mode:
DTC CHECK
HINT:
Hand-held tester only:
Compared to the normal mode, the check mode has more sens-
ing ability to detect malfunctions. Furthermore, the same diag-
nostic items which are detected in the normal mode can also be
detected in the check mode.
(a) Procedure for Check Mode using the hand-held tester.
(1) Check the initial conditions.

Battery positive voltage 11 V or more

Throttle valve fully closed

Transmission in P or N position

A/C switched OFF
(2) Turn the ignition switch OFF.
(3) Connect the hand-held tester to the DLC3.
(4) Turn the ignition switch ON.
(5) Switch the hand-held tester from the normal mode
to the check mode (Check that the MIL flashes).
NOTICE:
If the hand-held tester switches the ECM from the normal
mode to the check mode or vice-versa, or if the ignition
switch is turned from ON to ACC or OFF during the check
mode, the DTC and freeze frame data will be erased.
(6) Start the engine (MIL goes off after the engine
starts).
(7) Simulate the conditions of the malfunction de-
scribed by the customer.
NOTICE:
Leave the ignition switch ON until you have checked the
DTCs, etc.
(8) After simulating the malfunction conditions, use the
hand-held tester diagnosis selector to check the
DTCs and freeze frame data, etc.
HINT:
Be sure not to turn the ignition switch OFF, as turning it OFF
switches the diagnosis system from the check mode to the nor-
mal mode, which erases all the DTCs, etc.
(9) After checking the DTC, inspect the applicable cir-
cuit.
(b) When using the OBD II scan tool or hand-held tester:
Clearing the DTCs.
(1) Connect the OBD II scan tool or hand-held tester
to DLC3.
(2) Turn the ignition switch ON.