1986 TOYOTA LAND CRUISER brake light

DI-424
- DIAGNOSTICSAUTOMATIC TRANSMISSION
617 Author
: Date
:
2004 LAND CRUISER (RM1071U)
DTC P0724 Brake Switch ºBº Circuit High
CIRCUIT DESCRIPTION
The purpose of this circuit is to prevent the engine from stalling, while driving in lock-up condition, when
brakes are suddenly applied.
When the brake pedal is operated, this switch sends a signal to ECM. Then the ECM cancels operation of
the lock-up clutch while braking is in progress.
DTC No.DTC Detection ConditionTrouble Area
P0724Stop light switch always turn on even vehicle is driver Go and
Stop 10 times. (2-trip detection logic)
Short in stop light switch signal circuit

Stop light switch

ECM
MONITOR DESCRIPTION
When the stop light switch remains ON during ºstop and goº driving, the ECM interprets this as a fault in the
stop light switch and the MIL comes on and the ECM stores the DTC. The vehicle must stop and go (3 km/h
(2 mph) to 30 km/h (19 mph)) ten times for two driving cycles in order to detect malfunction.
MONITOR STRATEGY
Related DTCsP0724Stop light switch/Range check/Rationality
Rid /C tMainStop light switchRequired sensors/ComponentsSubVehicle speed sensor
Frequency of operationContinuous
DurationGO and STOP 10 times
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
The stop light switch remains on during GO and STOP 10 times.
GO and STOP are defined as follows;
GO: Vehicle speed30 km/h (19 mph) or more-
STOP: Vehicle speed-Less than 3 km/h (2 mph)
TYPICAL MALFUNCTION THRESHOLDS
Detection criteriaThreshold
Brake switch statusON stuck
WIRING DIAGRAM
See page DI-278.
DIB37-02

DI3BQ-04
- DIAGNOSTICSAUTOMATIC TRANSMISSION
DI-389
582 Author
: Date
:
2004 LAND CRUISER (RM1071U)
DIAGNOSTIC TROUBLE CODE CHART
If a DTC is displayed during the DTC check, check the circuit listed for that code in the table below and pro-
ceed to the page given.
*
1:
...MIL light up
DTC No.
(See Page)Detection ItemTrouble AreaMIL *1Memory
P0500
(DI-274)Vehicle Speed Sensor ºAº
Open or short in No. 1 vehicle speed sensor circuit
No. 1 vehicle speed sensor
Combination meter
ECM


P0705
(DI-402)Transmission Range Sensor Cir-
cuit Malfunction (PRNDL Input)Short in park/neutral position switch circuit
Park/neutral position switch
ECM


P0710
(DI-410)Transmission Fluid Temperature
Sensor ºAº CircuitOpen or short in ATF temperature sensor No.1 circuit
ATF temperature sensor No.1
ECM


P0711
(DI-415)Transmission Fluid Temperature
Sensor ºAº PerformanceATF temperature sensor No.1
ECM

P0712
(DI-410)Transmission Fluid Temperature
Sensor ºAº Circuit Low InputShort in ATF temperature sensor No.1 circuit
ATF temperature sensor No.1
ECM


P0713
(DI-410)Transmission Fluid Temperature
Sensor ºAº Circuit High InputOpen in ATF temperature sensor No.1 circuit
ATF temperature sensor No.1
ECM


P0717
(DI-418)Input Speed Sensor Circuit No
SignalOpen or short in speed sensor NT circuit
Speed sensor NT
ECM


P0722
(DI-421)Output Speed Sensor
Open or short in speed sensor SP2 circuit
Speed sensor SP2
ECM


P0724
(DI-424)Brake Switch ºBº Circuit High
Short in stop light switch circuit
Stop light switch
ECM


P0748
(DI-426)Pressure Control Solenoid ºAº
Electrical
(Shift Solenoid Valve SL1)Open or short in shift solenoid valve SL1 circuit
Shift solenoid valve SL1
ECM


P0751
(DI-433)Shift Solenoid ºAº Performance
(Shift Solenoid Valve S1)
Shift solenoid valve S1 is stuck open or closed
Valve body is blocked up or stuck
Shift solenoid valve S1
Automatic transmission assembly
ECM


P0756
(DI-437)Shift Solenoid ºBº Performance
(Shift Solenoid Valve S2)
Shift solenoid valve S2 is stuck open or closed
Valve body is blocked up or stuck
Shift solenoid valve S2
Automatic transmission assembly
ECM


P0771
(DI-441)Shift Solenoid ºEº Performance
(Shift Solenoid Valve SR)
Shift solenoid valve SR is stuck open or closed
Shift solenoid valve SL1 is stuck open or closed
Valve body is blocked up or stuck
Shift solenoid valve SR
Shift solenoid valve SL1
Automatic transmission assembly
ECM



- DIAGNOSTICSAUTOMATIC TRANSMISSION
DI-365
558 Author
: Date
:
(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.
4. DATA LIST
HINT:
According to the DATA LIST displayed by the OBD II 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 II 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
STOP LIGHT SWStop light SW Status/
ON or OFF
Brake Pedal is depressed: ON

Brake Pedal is released: OFFu
SHIFTActual Gear Position/
1st, 2nd, 3rd, 4th or 5th
Shift Lever Position is;

L: 1st

2: 1st or 2nd

3: 1st, 2nd or 3rd

4: 1st, 2nd, 3rd or 4th

D: 1st, 2nd, 3rd, 4th or 5th
u
PNP SW [NSW]PNP SW Status/
ON or OFFShift lever position is;
P or N: ON
Except P or N: OFF
REVERSEPNP SW Status/
ON or OFFShift lever position is;
R: ON
Except R: OFF
DRIVEPNP SW Status/
ON or OFFShift lever position is;
D and 4: ON
Except D and 4: OFF
Th hift l iti d th
4th/DRIVEPNP SW Status/
ON or OFFShift lever position is;
4: ON
Except 4: OFFThe shift lever position and these
values are different, there are fail-
ures of the PNP switch or shift
cable adjustment
3RDPNP SW Status/
ON or OFFShift lever position is;
3: ON
Except 3: OFFcable adjustment.
2NDPNP SW Status/
ON or OFFShift lever position is;
2 and L: ON
Except 2 and L: OFF
LOWPNP SW Status/
ON or OFFShift lever position is;
L: ON
Except L: OFF
LOCK UP SOLLock Up Solenoid Status/
ON or OFF
Lock Up: ON

Except Lock Up: OFFu

- DIAGNOSTICSAUTOMATIC TRANSMISSION
DI-373
566 Author
: Date
:
9. PROBLEM SYMPTOM CONFIRMATION
Taking into consideration the results of the customer problem analysis, try to reproduce the symptoms. If the
problem is that the transmission does not shift up, shift down, or the shift point is too high or too low, conduct
the following road test referring to the automatic shift schedule and simulate the problem symptoms.
10. ROAD TEST
NOTICE:
Perform the test at normal operating ATF temperature 50 to 80°C (122 to 176°F).
(a) D position test (NORM and PWR pattern):
Shift into the D position and fully depress the accelerator pedal and check the following points.
(1) Check up-shift operation.
Check that 1 " 2, 2 " 3, 3 " 4 and 4 " 5th up-shifts take place, and that the shift points conform
to the automatic shift schedule (See page SS-23).
HINT:

5th Gear Up-shift Prohibition Control (1. Coolant temp. is 55°C (131°F) or less. 2. Vehicle speed is
51 km/h (32 mph) or less.)

4th Gear Up-shift Prohibition Control (1. Coolant temp. is 40°C (104°F) or less. 2. Vehicle speed is
45 km/h (28 mph) or less.)

5th Gear Lock-up Prohibition Control (1. Brake pedal is depressed. 2. Coolant temp. is 60°C (140°F)
or less.)

When the 2nd start switch is on, there is no 1"2 up-shift and 2"1 down-shift.
(2) Check for shift shock and slip.
Check for shock and slip at the 1 " 2, 2 " 3, 3 " 4 and 4 " 5th up-shifts.
(3) Check for abnormal noises and vibration.
Drive in the D position lock-up or 5th gear and check for abnormal noises and vibration.
HINT:
The check for the cause of abnormal noises and vibration must be done very thoroughly as it could also be
due to loss of balance in the differential, torque converter clutch, etc.
(4) Check kick-down operation.
While running in the D position, 2nd, 3rd, 4th and 5th gears, check that the possible kick-down
vehicle speed limits for 2 " 1, 3 " 2, 4 " 3 and 5th " 4 kick-downs conform to those indicated
on the automatic shift schedule (See page SS-23).
(5) Check abnormal shock and slip at kick-down.
(6) Check the lock-up mechanism.

Drive in D position 5th gear, at a steady speed (lock-up ON) of about 70 km/h (43 mph).

Lightly depress the accelerator pedal and check that the engine speed does not change
abruptly.
If there is a big jump in engine speed, there is no lock-up.
(b) 4 position test:
Shift into the 4 position and fully depress the accelerator pedal and check the following points.
(1) Check up-shift operation.
Check that the 1 " 2, 2 " 3 and 3 " 4 up-shift takes place and that the shift point conforms
to the automatic shift schedule (See page SS-23).
HINT:

There is no 5th up-shift in the 4 position.

4th Gear Lock-up Prohibition Control (1. Brake pedal is depressed. 2. Coolant temp. is 60°C (140°F)
or less.)

D12640
D11985Control Shaft Lever
Loosen this nut
D07226
Neutral Basic line
Bolt
Groove
- DIAGNOSTICSAUTOMATIC TRANSMISSION
DI-375
568 Author
: Date
:
(g) P position test:
Stop the vehicle on a grade (more than 5°) and after shifting into the P position, release the parking
brake. Then, check that the parking lock pawl holds the vehicle in place.
11. ADJUST SHIFT LEVER POSITION
When shifting the shift lever from the N position to other posi-
tions, check that the lever can be shifted smoothly and accu-
rately to each position and that the position indicator is not
aligned with the correct position.
If the indicator is not aligned with the correct position, carry out
the following adjustment procedures.
(a) Loosen the nut on the shift lever.
(b) Push the control shaft fully rearward.
(c) Return the control shaft lever 2 notches to N position.
(d) Set the shift lever to N position.
(e) While holding the shift lever lightly toward the R position
side, tighten the shift lever nut.
Torque: 13 N´m (130 kgf´cm, 9 ft´lbf)
(f) Start the engine and make sure that the vehicle moves
forward when shifting the lever from the N to D position
and reverses when shifting it to the R position.
12. ADJUST PARK/NEUTRAL POSITION SWITCH

Check that the engine can be started with the shift lever
only in the N or P position, but not in other positions.
If it is not as stated above, carry out the following adjustment
procedures.

Loosen the park/neutral position switch bolt and set
the shift lever to the N position.

Align the groove with neutral basic line.

Hold in position and tighten the bolt.
Torque: 13 N´m (130 kgf´cm, 9 ft´lbf)

For continuity inspection of the park/neutral position
switch, see page DI-394.
13. CHECK IDLE SPEED
Idle speed (In N position and air conditioner OFF):
700 ± 50 rpm

- DIAGNOSTICSCRUISE CONTROL SYSTEM
DI-993
1186 Author
: Date
:
2004 LAND CRUISER (RM1071U)
DTC P0571/52 Brake Switch ºAº Circuit
CIRCUIT DESCRIPTION
When the brake pedal is depressed, the stop light switch sends a signal to the ECM. When the ECM receives
this signal, it cancels the cruise control.
A fail-safe function is provided so that the cancel functions normally, even if there is a malfunction in the stop
light signal circuit.
The cancel condition is that battery positive voltage is supplied to terminal STP.
When the brake is on, battery positive voltage is normally applied through the STOP fuse and stop light
switch to terminal STP of the ECM, and the ECM turns the cruise control OFF.
If the harness connected to terminal STP has an open circuit, terminal STP will have battery positive voltage
and the cruise control will be turned OFF.
DTC No.Detection ItemTrouble Area
P0571/52Stop light switch circuit.

Stop light switch

Harness or connector between ECM and stop light switch
circuit

ECM
DIB6A-01

- DIAGNOSTICSCRUISE CONTROL SYSTEM
DI-995
1188 Author
: Date
:
2004 LAND CRUISER (RM1071U)
INSPECTION PROCEDURE
HINT:
In case of using the hand-held tester, start the inspection from step 1 and in case of not using the hand-held
tester, start from step 2.
1 Check stop light switch using hand-held tester.
PREPARATION:
Connect the hand-held tester to the DLC3.
(a) Connect the hand-held tester to the DLC3.
(b) Turn the ignition switch ON and push the hand-held tester main SW ON.
CHECK:
Select the item ºSTOP LIGHT SWº in the DATA LIST and read its valve displayed.
OK:
Brake pedal depressed: ON
Brake pedal released: OFF
OK Proceed to next circuit inspection shown in
problem symptom table (See page DI-991).
NG
2 Check operation of stop light.
CHECK:
Check that stop light comes on when brake pedal is depressed, and turns off when brake pedal is released.
NG Check stop light system (See page BE-49).
OK

I25004
STP
STI-
DI-996
- DIAGNOSTICSCRUISE CONTROL SYSTEM
1189 Author
: Date
:
2004 LAND CRUISER (RM1071U)
3 Check voltage between terminal STP/STI- of ECM connector and body ground.
PREPARATION:
(a) Remove the ECM with connectors still connected.
(b) Turn ignition switch ON.
CHECK:
Measure voltage between terminal STP/STI- of ECM connec-
tor and body ground when the brake pedal is depressed and re-
leased.
OK:
Depressed10 - 14 V
ReleasedBelow 1 V
OK Proceed to next circuit inspection shown in
problem symptom table (See page DI-991).
NG
4 Check wire harness and connector between terminal STP of ECM and stop light
switch, and terminal STI- of ECM and stop light switch (See page IN-36).
NG Repair or replace harness or connector.
OK
Check and replace ECM (See page IN-36
).