1996 TOYOTA LAND CRUISER Workshop Manual

DI−140
−
DIAGNOSTICS AUTOMATIC TRANSMISSION
1996 LAND CRUISER (RM451U)
(6) Shift into the D position. Press all the way down on the accelerator pedal wi\
th your right foot.
Quickly read the stall speed at this time.
Stall speed: 1,950 ± 150 rpm
(7) Do the same test in R position.
Stall speed: 1,950 ± 150 rpm
Evaluation:
ProblemPossible cause
Stall speed low in D and R positions
 Engine output may be insuf ficient
 Stator one− way clutch is operating properly
HINT:
If more than 600 rpm below the specified value, the torque con-
verter clutch could be faulty.
Stall speed high in D position
 Line pressure too low
 Forward clutch slipping
 No. 2 one− way clutch not operating properly
 O/D one− way clutch not operating properly
Stall speed high in R position
Line pressure too low
 Direct clutch slipping
 1st and reverse brake slipping
 O/D clutch slipping
Stall speed high in D and R positions
Line pressure too low
 Improper fluid level
 O/D one− way clutch not operating properly
(b) Measure the time lag.
When the shift lever is shifted while the engine is idling, there will be a certain time lapse o\
r lag before
the shock can be felt. This is used for checking the condition of the O/D d\
irect clutch, forward clutch,
direct clutch and 1st and reverse brake.
NOTICE:
Do the test at normal operating ATF temperature 50 − 80°C (122 − 176° F).
Be sure to allow 1 minute interval between tests.
Take 3 measurements and take the average value.
(1) Fully apply the parking brake.
(2) Start the engine and check idle speed.
Idle speed: 650 ± 50 rpm (In N position and air conditioner OFF)
(3) Shift the shift lever from N to D position. Using a stop watch, measure the ti\
me it takes from shift-
ing the lever until the shock is felt.
In the same manner, measure the time lag for N → R.
Time lag: N → D Less than 1.2 seconds
In the same way, measure the time lag for N → R.
Time lag: N → R Less than 1.5 seconds
If N → D time or N → R time lag is longer than specified:
Evaluation:
ProblemPossible cause
N → D time lag is longer
Line pressure too low
 Forward clutch worn
 O/D one− way clutch not operating properly
N → R time lag is longer
Line pressure too low
 Direct clutch worn
 1st and reverse brake worn
 O/D one− way clutch not operating properly
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−
DIAGNOSTICS AUTOMATIC TRANSMISSION
DI−141
1996 LAND CRUISER (RM451U)
8. HYDRAULIC TEST
Measure the line pressure.
NOTICE:
Do the test at normal operation ATF temperature 50 − 80°C (122 − 176° F).
The line pressure test should always be carried out in pairs. One techni\
cian should observe
the conditions of wheels or wheel stoppers outside the vehicle while the ot\
her is doing the test.
Be careful to prevent SST’s hose from interfering with the exhaust pipe.
(1) Warm up the ATF.
(2) Remove the test plug on the transmission case right side and connect SST\
(See page AT−18
for the location to connect SST).
SST 09992 −00094 (09992 −00150, 09992−00270)
(3) Fully apply the parking brake and chock the 4 wheels.
(4) Start the engine and check idling speed.
(5) Keep your left foot pressed firmly on the brake pedal and shift into D p\
osition.
(6) Measure the line pressure when the engine is idling.
(7) Press the accelerator pedal all the way down. Quickly read the highest line pr\
essure when engine
speed reaches stall speed.
NOTICE:
Release the accelerator pedal and stop test if the rear wheels begin to rotate before the engine speed
reaches the specified stall speed.
(8) In the same manner, do the test in R position.
Specified line pressure:
Condition D position kPa (kgf/cm2, psi) R position kPa (kgf/cm2, psi)
Idling422 −
481 (4.3 − 4.9, 61 − 70)510 − 608 (5.2 − 6.2, 74 − 88)
Stall1,285 − 1,530 (13.1 − 15.6, 128 − 153)1,579 − 1,932 (16.1 − 19.7, 158 − 193)
If the measured pressures are not up to specified values, recheck the thro\
ttle cable adjustment and retest.
Evaluation:
ProblemPossible cause
If the measured value at all positions are higher
Throttle cable out of adjustment
 Throttle valve defective
 Regulator valve defective
If the measured value at all positions are lower
Throttle cable out of adjustment
 Throttle valve defective
 Regulator valve defective
 Oil pump defective
 O/D direct clutch defective
If pressure is low in the D position onlyD position circuit fluid leakage
 Forward clutch defective
If pressure is low in the R position only
R position circuit fluid leakage
 Direct clutch defective
 1st and reverse brake defective
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Q07312
DI−142
−
DIAGNOSTICS AUTOMATIC TRANSMISSION
1996 LAND CRUISER (RM451U)
9. MANUAL SHIFTING TEST
The purpose of this manual shifting test is to determine whether
a problem is caused by either mechanical or electrical factors.
Disconnecting the solenoid wire disables electrically −con-
trolled automatic gear shifting. In this case, operating the shift
lever is the only way to shift the transmission gear. If the gear
is not changed by shift lever operation, it is assumed that there
is a mechanical problem.
(a) Turn the ignition switch OFF.
(b) Disconnect the solenoid wire connector.
(c) Warm up the engine.
(d) Drive the vehicle.
(e) Check the transmission operation when the shift lever is moved into L, 2 and D positions.
Standard:
Shift LeverOperation
L to 2Shift up
2 to DShift up
D to 2Shift down
2 to LShift down
(f) Turn the ignition switch OFF.
(g) Connect the solenoid wire connector.
(h) Clear DTCs.
HINT:
When the solenoid wire is disconnected, the transmission gear
will be set as listed below:
Shift LeverGear
PParking
RReverse
NNeutral
DO/D (4th)
23rd
L1st
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DI5KB−03
−
DIAGNOSTICS AUTOMATIC TRANSMISSION
DI−143
1996 LAND CRUISER (RM451U)
DIAGNOSTIC TROUBLE CODE CHART
If a DTC is displayed during the DTC check, check the circuit listed for that code i\
n the table below and pro-
ceed to the page given.
DTC No.
(See page)Detection ItemTrouble AreaMIL*Memory
P0500
( DI−153 )Vehicle Speed Sensor Malfunc-
tion
(No. 1 Vehicle Speed Sensor)Open or short in No. 1 vehicle speed sensor circuit
 No. 1 vehicle speed sensor
 ECM

P0710
( DI−154 )Transmission Fluid Temperature
Sensor Malfunction
(ATF Temperature Sensor) Open or short in ATF temperature sensor circuit
 ATF temperature sensor
 ECM

P0750
( DI−156 )Shift Solenoid A Malfunction
(Shift Solenoid Valve No. 1)Shift solenoid valve No. 1 is stuck open or closed
 Valve body is blocked up or stuck
P0753
( DI−157 )Shift Solenoid A Electrical
Malfunction
(Shift Solenoid Valve No. 1)Open or short in shift solenoid valve No. 1 circuit
 Shift solenoid valve No. 1
 ECM

P0755
( DI−156 )Shift Solenoid B Malfunction
(Shift Solenoid Valve No. 2)Shift solenoid valve No. 2 is stuck open or closed
 Valve body is blocked up or stuck
P0758
( DI−157 )Shift Solenoid B Electrical
Malfunction
(Shift Solenoid Valve No. 2)Open or short in shift solenoid valve No. 2 circuit
 Shift solenoid valve No. 2
 ECM

P0770
( DI−161 )Shift Solenoid E Malfunction
(Shift Solenoid Valve SL)Shift solenoid valve SL is stuck open or closed
 Valve body is blocked up or stuck
 Lock− up clutch

P0773
( DI−163 )Shift Solenoid E Electrical
Malfunction
(Shift Solenoid Valve SL)Open or short in shift solenoid valve SL circuit
 Shift solenoid valve SL
 ECM

P1700
( DI−166 ) Speed Sensor No. 2 Circuit
Malfunction
(No. 2 Vehicle Speed Sensor)Open or short in No. 2 vehicle speed sensor circuit
 No. 2 vehicle speed sensor
 ECM

P1780
( DI−169 )Park/Neutral Position Switch
MalfunctionShort in park/neutral position switch circuit
 Park/neutral position switch
 ECM

*:  ...MIL light up
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DI5KD−02
Q08236
No. 1 Vehicle
Speed Sensor
O/D OFF Indicator Light
MIL
Pattern Select Switch O/D Main Switch
DLC1
Shift Solenoid Valve SL
ECM
Stop Light Switch L4 Position Sensor
Park/Neutral Position Switch No. 2 Vehicle Speed Sensor
Shift Solenoid Valve No. 2
Shift Solenoid Valve No. 1
Engine Coolant Temperature Sensor
Throttle Position Sensor
ATF Temperature Sensor
DLC3
Transfer Neutral
Position Switch
DI−144
−
DIAGNOSTICS AUTOMATIC TRANSMISSION
1996 LAND CRUISER (RM451U)
PARTS LOCATION
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DI5KE−03
Vd762D00115
E4
11
12
13 1415
16
10 12
3
4
567
8
9
10
11
12
123
456
7
1
2
34
56
8910
11
7
8
9
12141516 13
17181920
21
22
23
242526
ECM T
erminals
1
23
4
5
6
7
89
10
11
13 12
15
16
171819202122 14
E5E6E7
−
DIAGNOSTICS AUTOMATIC TRANSMISSION
DI−145
1996 LAND CRUISER (RM451U)
TERMINALS OF ECM
Symbols (T erminal No.)Wiring ColorConditionSTD Voltage (V)
SPD (E7−8) − E1 (E4− 24)L− W − BR− B
Disconnect cruise control connector and IG ON StationaryBelow 1.5
Disconnect cruise control connector and IG ON
Turn one rear wheel slowlyPulse signal is outputBelow 1.5 ↔ 4 − 6
S1 (E4− 10) − E1 (E4− 24)R − BR− B
IG OFF Disconnect ECM connector11 − 15 Ω
IG ON9 − 14
1st or 2nd gear9 − 14
3rd or O/D gearBelow 1.5
S2 (E4− 9) − E1 (E4− 24)R−Y − BR− B
IG OFF Disconnect ECM connector11 − 15 Ω
IG ONBelow 1.5
2nd or 3rd gear9 − 14
1st or O/D gearBelow 1.5
SL (E4− 8) − E1 (E4− 24)R−L − BR− B
IG OFF Disconnect ECM connector11 − 15 Ω
IG ONBelow 1.5
Vehicle driving under lock −up position9 − 14
SP2+ (E6− 2) − SP− (E6− 8)V − V−G
IG OFF Disconnect ECM connector560 − 680 Ω
Engine is runningPulse signal is output
Below 1.5 ↔ 4 − 6
OD1 (E7− 18) − E1 (E4− 24)G−O − BR− BIG ON9 − 14
OD2 (E7− 19) − E1 (E4− 24)P−L − BR− BO/D main switch ON (O/D OFF)Below 3
O/D main switch OFF (O/D ON)9 − 14
OIL (E5− 12) − E2 (E5− 9)R−W − BR− BATF temperature: 110 °C (230° F)Below 1.5
L (E7−17) − E1 (E4− 24)G−W − BR− BIG ON Shift lever L position7.5 − 14
IG ON Shift lever other than L positionBelow 1.5
2 (E7−16) − E1 (E4− 24)O − BR− BIG ON Shift lever 2 position7.5 − 14
IG ON Shift lever other than 2 positionBelow 1.5
R (E7−15) − E1 (E4− 24)R−B − BR− BIG ON Shift lever R position7.5 − 14
IG ON Shift lever other than R positionBelow 1.5
NSW (E7−22) − E1 (E4− 24)B−W − BR− BIG ON Shift lever P or N positionBelow 3
IG ONShift lever other than P and N position9 − 14
STP (E7− 14) − E1 (E4− 24)G−W − BR− BIG ON Brake pedal is depressed7.5 − 14
IG ON Brake pedal is releasedBelow 1.5
THW (E5−4) − E2 (E5− 9)R−W − BR− BIG ON Engine coolant temperature 80 °C (176° F)Below 1.5
IDL (E5− 11) − E2 (E5− 9)G−W − BR− BIG ON Accel. pedal is releasedBelow 1.5
IG ONAccel. pedal is depressed9 − 14
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DI−146
−
DIAGNOSTICS AUTOMATIC TRANSMISSION
1996 LAND CRUISER (RM451U) VTA (E5−
10) − E2 (E5− 9)
G−B − BR− BIG ON Accel. pedal is releasedBelow 0.3 − 0.8
IG ON Accel. pedal is depressed3.2 − 4.9
PWR (E7− 20)− E1 (E4− 24)P−B − BR− BIG ON Pattern select switch ”NORM”Below 1.5
IG ON Pattern select switch ”PWR”7.5 − 14
TFN (E7− 21)− E1 (E4− 24)Y−L − BR− BIG ON Transfer N positionBelow 3
IG ONTransfer other than N position9 − 14
L4SW (E7− 9)− E1 (E4− 24)B−L − BR− BIG ON Transfer L4 position7.5 − 14
IG ON Transfer other than L4 positionBelow 1.5
HOLD (E4−3) − E1 (E4− 24)O − BR− BIG ON 2nd start switch ON9 − 14
IG ON 2nd start switch OFFBelow 1.5
HI (E4−18) − E1 (E4− 24)R−W − BR− BIG ON7.5 − 14
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DI5KH−03
−
DIAGNOSTICS AUTOMATIC TRANSMISSION
DI−147
1996 LAND CRUISER (RM451U)
PROBLEM SYMPTOMS TABLE
If a normal code is displayed during the diagnostic trouble code check but\
the trouble still occurs, check the
circuits for each symptom in the order given in the charts on the following pages and\
proceed to the page
given for troubleshooting.
The Matrix Chart is divided into 3 chapters.
Chapter 1: Electronic Circuit Matrix Chart
Chapter 2: On−Vehicle repair Matrix Chart
Chapter 3: Off−Vehicle repair Matrix Chart
When troubleshooting, check Chapter 1 first. If instructions are given i\
n Chapter 1 to proceed to chapter 2
or 3, proceed as instructed.
(1) If the instruction ”Proceed to next circuit inspection shown on matrix chart” is given in the flow
chart for each circuit, proceed to the circuit with the next highest number in the table to cont\
inue
the check.
(2) If the trouble still occurs even though there are no abnormalities in any\
of the other circuits, then check and replace the ECM.
Chapter 1: Electronic Circuit Matrix Chart
SymptomSuspect AreaSee page
Vehicle does not move in any forward position and reverse posi-
tion6. On−vehicle repair matrix chart
7. Off −vehicle repair matrix chart−
−
Vehicle does not move in a particular position or positions1. On −vehicle repair matrix chart
2. Off −vehicle repair matrix chart−
−
No up− shift (1st → 2nd)
1. Shift solenoid valve No. 1 and No. 2 circuit
2. Throttle position sensor circuit
3. No. 1 vehicle speed sensor circuit
4. No. 2 vehicle speed sensor circuit
5. On −vehicle repair matrix chart
6. Park/neutral position switch circuit
7. Off −vehicle repair matrix chart
8. ECMDI−157 DI−35
DI−87
DI−166 −
DI−169 −
DI−145
No up −shift (2nd → 3rd)
1. Shift solenoid valve No. 1 and No. 2 circuit
2. Throttle position sensor circuit
3. No. 1 vehicle speed sensor circuit
4. No. 2 vehicle speed sensor circuit
5. On−vehicle repair matrix chart
6. Park/neutral position switch circuit
7. Off −vehicle repair matrix chart
8. ECMDI−157 DI−35
DI−87
DI−166 −
DI−169 −
DI−145
No up− shift (3rd → O/D)
1. O/D main switck& O/D OFF indicator light circuit
2. Shift solenoid valve No. 1 and No. 2 circuit
3. No. 1 vehicle speed sensor circuit
4. No. 2 vehicle speed sensor circuit
5. Throttle position sensor circuit
6. Park/neutral position switch circuit
7. O/D cancel signal circuit
8. Engine coolant temp. sensor circuit
9. On−vehicle repair matrix chart
10.Off −vehicle repair matrix chart
11. ECMDI−174
DI−157 DI−87
DI−166 DI−35
DI−169
DI−172 DI−30 −
−
DI−145
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