TOYOTA LAND CRUISER 1998 Factory Repair Manual

- DIAGNOSTICSAUTOMATIC TRANSMISSION
DI-391
584 Author
: Date
:
2004 LAND CRUISER (RM1071U)P2757
(DI-487)
Torque Converter Clutch Pres-
sure Control Solenoid Perfor-
mance
(Shift Solenoid Valve SLU)Shift solenoid valve SLU is stuck open or closed
Valve body is blocked up or stuck
Shift solenoid valve SLU
Automatic transmission assembly
ECM


P2759
(DI-491)
Torque Converter Clutch Pres-
sure Control Solenoid Control
Circuit Electrical
(Shift Solenoid Valve SLU)Open or short in shift solenoid valve SLU circuit
Shift solenoid valve SLU
ECM



DI3BN-04
Vehicle Brought to Workshop
Customer Problem Analysis
Check DTC and Freeze Frame Data (Precheck)
Record or Print DTC and Freeze Frame Data DI-361
Clear DTC and Freeze Frame Data DI-361
Visual Inspection
Setting the Check Mode Diagnosis DI-361
1
Items insideare titles of pages in this manual, with the
page number indicated in the bottom portion. See the indicated
pages for detailed explanations.
DI-360
Connect an OBD II scan tool or hand-held tester to DLC3.
If the display shows ºUNABLE TO CONNECT TO VEHICLEº when you have connected the
scan tool/hand-held tester, inspect DLC3 DI-361
2
3
4
5
6
Symptom does not occur
Problem Symptom Confirmation8
7Symptom Simulation
P.IN-26
Symptom occurs
DTC Check
DI-361OK Code
11Preliminary Check
DI-361
DTC Chart
DI-389
Mechanical System Test
DI-361
Manual Shifting Test
DI-361OK
OK
Chapter 1
(Electronic)Chapter 2
(On-V ehicle)
DI-396OKChapter 3
(Off-V ehicle)OK Matrix Chart of Problem Symptoms - DI-396
Circuit
Inspection
NG
Parts Inspection
NG
NGNG
Identification of ProblemRepairConfirmation TestEnd
NG
NG
12
OK13
14
1516
17 9
10
DI-396DI-396
DI-495 to DI-500
18

Pattern Select Switch Circuit Check

A/T.P. Indicator Circuit Check DI-358
- DIAGNOSTICSAUTOMATIC TRANSMISSION
551 Author
: Date
:
2004 LAND CRUISER (RM1071U)
AUTOMATIC TRANSMISSION
HOW TO PROCEED WITH TROUBLESHOOTING

DI3BR-05
D13102
Combination Meter
DLC3 Stop Light SwitchECM
Transmission Control
Switch
(2 e L Position)
Pattern Select Switch
Park/Neutral Position Switch
Speed Sensor SP2
Shift Solenoid Valve S1
Shift Solenoid Valve SR
Shift Solenoid Valve SLU
Shift Solenoid Valve SL2 ATF Temperature
Sensor No. 2Speed Sensor NT
Indicator Switch
(Transfer Neutral Position Switch)
Indicator Switch
(Transfer L4 Position Switch)
Transmission Control
Switch
(D e 4 Position)
MIL

ECT PWR Indicator Light

2nd STRT Indicator Light

A/T. P. Indicator Light
Shift Solenoid
Valve SL1
Shift Solenoid
Valve SLT
ATF Temperature
Sensor No. 1
Shift Solenoid Valve S2

AT Oil Temp warning Light DI-392
- DIAGNOSTICSAUTOMATIC TRANSMISSION
585 Author
: Date
:
2004 LAND CRUISER (RM1071U)
PARTS LOCATION

DIC2W-01
- DIAGNOSTICSAUTOMATIC TRANSMISSION
DI-359
552 Author
: Date
:
2004 LAND CRUISER (RM1071U)
PRECAUTION
NOTICE:
Perform the RESET MEMORY (AT initialization) when replacing the automatic transmission assy, en-
gine assy or the ECM (See page DI-361).
HINT:
Initialization can not be completed by only disconnecting the battery terminal.

DIDYQ-01
FI0534
- DIAGNOSTICSAUTOMATIC TRANSMISSION
DI-361
554 Author
: Date
:
PRE-CHECK
1. DIAGNOSIS SYSTEM
(a) Description
(1) When troubleshooting OBD II vehicles, the only dif-
ference from the usual troubleshooting procedure
is that you need to connect an OBD II scan tool com-
plying with SAE J1987 or a hand-held tester to the
vehicle, and read off various data output from the
vehicle's ECM.
(2) OBD II regulations require that the vehicle's on-
board computer illuminate the Malfunction Indicator
Lamp (MIL) on the instrument panel when the com-
puter detects a malfunction in the computer itself or
in the drive system components which affect the ve-
hicle emissions. In addition to the MIL illuminating
when a malfunction is detected, the applicable
DTCs prescribed by SAE J2012 are recorded in the
ECM memory (See page DI-381).
If the malfunction does not occur in 3 consecutive trips, the MIL
goes off but the DTCs remain in the ECM memory.
(3) To check the DTCs, connect the OBD II scan tool or
hand-held tester to the DLC3 of the vehicle. The
OBD II scan tool or hand-held tester also enables
you to erase the DTCs and check freeze frame data
and various forms of engine data (For instruction
book).
(4) The DTCs include SAE controlled codes and
Manufacturer controlled codes. SAE controlled
codes must be set as prescribed by the SAE, while
Manufacturer controlled codes can be set freely by
a manufacturer within the prescribed limits (See the
DTC chart on page DI-381).
(5) The diagnosis system operates in the normal mode
during the normal vehicle use, and also has a check
mode for technicians to simulate malfunction symp-
toms and perform troubleshooting. Most DTCs use
2 trip detection logic(*) to prevent erroneous detec-
tion. By switching the ECM to the check mode when
troubleshooting, the technician can cause the MIL
to light up for a malfunction that is only detected
once or momentarily. (hand-held tester).
(6) *2 trip detection logic:
When a malfunction is first detected, the malfunc-
tion is temporarily stored in the ECM memory. If the
same malfunction is detected again during the se-
cond test drive, this second detection causes the
MIL to illuminate.

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.

- 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

DI-366
- DIAGNOSTICSAUTOMATIC TRANSMISSION
559 Author
: Date
:
PATTERN SW (M)Pattern SW (PWR) Status/
ON or OFFPattern SW (PWR) is;
Pushed in: ON
Pushed once again: OFF
u
SNOW SWPattern SW (2nd) Status/
ON or OFF

IG SW ON: OFF
O

Pattern SW (2nd) Push: ON
O

Pattern SW (2nd) Push: OFF
u
SOLENOID (SLT)Shift Solenoid SLT Status/
ON or OFFIG SW ON: ONu
SOLENOID (SLU)Shift Solenoid SLU Status/
ON or OFF
Lock Up: ON

Except Lock Up: OFFu
SPD (SP2)
Counter Gear Speed display/
min.: 0 km/h (0 mph)
max.: 255 km/h (158 mph)
Vehicle stopped: 0 km/h (0 mph)u
AT FLUID TEMP
ATF Temp. Sensor No. 1 Value/
min.: -40C (-40F)
max.: 215C (419F)80C (176F)
(After Stall Test)
If the value is º-40C (-40F)º or
º215C (419F)º, ATF temp. sen-
sor No. 1 circuit is opened or
shorted.
5. ACTIVE TEST
HINT:
Performing the ACTIVE TEST using the Hand-held tester allows the relay, VSV, actuator and so on to oper-
ate without parts removal. Performing the ACTIVE TEST as a first step of troubleshooting is one method
to shorten labor 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 to the DLC3.
(d) Turn the ignition switch ON.
(e) Push the ºONº button of Hand-held tester.
(f) Select the item º/DIAGNOSIS/ENHANCED OBD ll/ACTIVE TESTº.
(g) According to the display on tester, perform the ºACTIVE TESTº.
ItemTest DetailsDiagnostic Note
SHIFT
[Test Details]
Operate the shift solenoid valve and set the each shift position by your-
self.
[Vehicle Condition]
Less than 50 km/h (31 mph)
[Others]

Press " button: Shift up

Press u button: Shift downPossible to check the operation of
the shift solenoid values.
HINT:
Shifting to the 5th gear is possible
only when the vehicle stops or idle
is ON.
LOCK UP
[Test Details]
Control the shift solenoid SLU to set the ATM to the lock-up condition.
[Vehicle Condition]
Vehicle Speed: 58 km/h (36 mph) or more
Possible to check the SLU opera-
tion.
LINE PRESS UP
[Test Details]
Operate the shift solenoid SLT and raise the line pressure.
[Vehicle Condition]

Vehicle Stopped.

IDL: ON
[Others]
ON: Line pressure up.
OFF: No action (normal operation)
-