1996 TOYOTA LAND CRUISER OIL

S00816
BatteryFusible
Link
F8F7
11
W−R
3EA2
W−R11 6
IG Switch B−R
Fuse BlockIGN B−L
22
22 2
2
EFI Main Relay
1
2
3 4
EFI R
−Y
EC
EB
B−R
1EB1
R
Y−R
Y−REA2IH1
22 7
BR−B E4
E7 E7 E7
IGSW
MRLY
+B
E1 B+
ECM
1
3
12
24FL AM2
FL MAIN
W R
R/B No.2 Y
DI−11 0
−
DIAGNOSTICS ENGINE
1996 LAND CRUISER (RM451U)
ECM Power Source Circuit
CIRCUIT DESCRIPTION
When the ignition switch is turned ON, battery positive voltage is applied t\
o the coil, closing the contacts of
the EFI main relay (Marking: EFI) and supplying power to the terminals +B\
of the ECM.
WIRING DIAGRAM
DI5PX−02
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P22480
BatteryStarter
FL MAIN
FL AM2EFI
EFI Main Relay
IG Switch IG
ST
Park/Neutral
Position SwitchCircuit Opening
Relay
Fuel Pump Relay
Fuel Pump
From Crankshaft Position
Sensor Fuel Pump
Resistor
(STA Signal)
(NE Signal) MRLY
FC
STA
NE
Tr1
Tr2
ECM
IGN FPR
−
DIAGNOSTICS ENGINE
DI−11 5
1996 LAND CRUISER (RM451U)
Fuel Pump Control Circuit
CIRCUIT DESCRIPTION
In the diagram below, when the engine is cranked, current flows form terminal ST of the igni\
tion switch to
terminal STA of ECM (STA signal).
When the STA signal and NE signal are input to the ECM, Tr1 is turned ON, current flows to coil of the circuit
opening relay, the relay switches on, power is supplied to the fuel pump and the fuel\
pump operates.
While the NE signal is generated (engine running), the ECM keeps Tr1 ON (circuit opening relay ON) and
the fuel pump also keeps operating.
The fuel pump speed is controlled at 2 levels (high speed or low speed) b\
y the condition of the engine (start-
ing, light load, heavy load). When the engine starts (STA ON), Tr2 in the ECM is OFF, so battery voltage is
applied directry to the fuel pump. Fuel pump operates at high speed.
After the engine starts, during idling or light loads, since Tr2 goes ON, power is supplied to the fuel pump
via the fuel pump resistor.
Fuel pump operates at low speed.
DI5PY−02
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Q07308
AT3417
OK if hot
Add if hot
AT4252
0 − 1 mm
Q07309
DI−138
−
DIAGNOSTICS AUTOMATIC TRANSMISSION
1996 LAND CRUISER (RM451U)
(3) With the engine OFF, add new fluid through the oil
filler pipe.
Fluid type: ATF DEXRON ®II
Capacity:
Dry fill: 11.0 liters (11.6 US qts, 9.7 Imp. qts)
Drain and refill: 1.9 liters (2.0 US qts, 1.7 Imp. qts)
(4) Start the engine and shift the shift lever into all posi-
tions from P to L position and then shift into P posi-
tion.
(5) With the engine idling, check the fluid level. Add fluid up to the COOL level on the dipstick.
(6) Check the fluid level at the normal operating tem- perature 70 − 80° C (158 − 176°F) and add as nec-
essary.
NOTICE:
Do not overfill.
(d) Check the fluid leaks.
Check for leaks in the transmission.
If there are leaks, it is necessary to repair or replace O −rings,
Seal packings, oil seals, plugs or other parts.
(e) Inspect and adjust the throttle cable. (1) Check that the throttle valve is fully closed.
(2) Check that the inner cable is not slack.
(3) Measure the distance between the outer cable endand stopper on the cable.
Standard distance: 0 − 1 mm (0 − 0.04 in.)
If the distance is not standard, adjust the cable by the adjusting
nuts.
(f) Inspect and adjust the shift lever position. When shifting the shift lever from the N position to other
positions, check that the lever can be shifted smoothly
and accurately to each position and that the position indi-
cator correctly indicates the position.
If the indicator is not aligned with the correct position, carry out
the following adjustment procedures. (1) Loosen the nut on the control rod.
(2) Push the control rod fully rearward.
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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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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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−
DIAGNOSTICS AUTOMATIC TRANSMISSION
DI−151
1996 LAND CRUISER (RM451U)
Slip or shudder (Forward and reverse)
1. Throttle cable
2. Transmission control rod
3. Oil strainer
4. Pressure relief valve
5. Off
−vehicle repair matrix chartDI−131
DI−131

−
Slip or shudder (Particular position)
1. Throttle cable
2. Transmission control rod
3. Off −vehicle repair matrix chartDI−131
DI−131
−
No engine braking (1st (L position))1. Low coast modulator
2. Off −vehicle repair matrix chart
−
No engine braking (2nd (2 position))1. 2nd coast modulator
2. Off −vehicle repair matrix chart
−
No kick− down1. 1−2 shift valve
2. 2 −3 shift valve

Chapter 3: Off −Vehicle Repair
(  : A340F, A343F Automatic Transmission Repair Manual Pub. No. RM479U)
SymptomSuspect AreaSee page
Vehicle does not move in any forward position and reverse posi-
tion1. O/D one− way clutch (F0)
2. O/D planetary gear unit
3. Torque converter clutch

AT −26
Vehicle does not move in R position
1. 2nd coast brake (B1)
2. Front and rear planetary gear unit
3. Direct clutch (C
2)
4. 1st and reverse brake (B
3)




Vehicle does not move in D, 2 and L positions1. Forward clutch (C1)
Vehicle does not move in D and 2 positions1. No. 2 one− way clutch (F2)
Vehicle does not move in 2 position1. 1st and reverse brake (B3)
Vehicle does not move in L position
1. 2nd brake (B2)
2. 2nd coast brake (B
1)
3. Direct clutch (C
2)



No up− shift (1st → 2nd)1. 2nd brake (B2)
2. No. 1 one− way clutch (F
1)


No up−shift (2nd → 3rd)1. Direct clutch (C2)
No up−shift (3rd → O/D)1. O/D brake (B0)
No down−shift (2nd → 1st)1. 2nd brake (B2)
Lock−up does not engage or lock −up does not disengage1. Torque converter clutchAT −26
Harsh engagement (N → D)
1. Forward clutch (C1)
2. O/D one− way clutch (F
0)
3. No. 2 one− way clutch (F
2)



Harsh engagement (N → R)
1. Direct clutch (C2)
2. 1st and reverse brake (B
3)
3. O/D one− way clutch (F
0)



Harsh engagement (2nd → 3rd)1. Direct clutch (C2)
Harsh engagement (3rd → O/D)1. O/D brake (B0)
2. O/D planetary gear unit

Harsh engagement (O/D → 3rd)1. O/D one− way clutch (F0)
Harsh engagement (Lock −up)1. Torque converter clutchAT −26
Slip or shudder (Forward and reverse (After warm −up))
1. Torque converter clutch
2. O/D one− way clutch (F
0)
3. O/D direct clutch (C
0)
AT −26


Slip or shudder (Forward and reverse (Just after engine starts))1. Torque converter clutchAT −26
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Q04346
ATF Temperature SensorOIL
E5
R−W
BR−B
1 2
E2
E5 ECM
12 9 4 −
6 V
DI−154
−
DIAGNOSTICS AUTOMATIC TRANSMISSION
1996 LAND CRUISER (RM451U)
DTC P0710 Transmission Fluid Temperature Sensor Cir-
cuit Malfunction (ATF Temperature Sensor)
CIRCUIT DESCRIPTION
The ATF temperature sensor converts fluid temperature into resistance value w\
hich is input into the ECM.
DTC No.DTC Detecting ConditionTrouble Area
P0710
Either (a) or (b) is detected for 0.5 sec. or more
(a) Temp. sensor resistance is less than 79 Ω
(b) After the engine has been operating for 15 min. or more, the resistance at the temp. sensor is more than 156 k ΩOpen or short in ATF temp. sensor circuit
 ATF temp. sensor
 ECM
WIRING DIAGRAM
DI5KK−02
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Q08221 Q08220D00081
(+) (−)
(+) (−)Air
DI−156
−
DIAGNOSTICS AUTOMATIC TRANSMISSION
1996 LAND CRUISER (RM451U)
DTC P0750, P0755 Shift Solenoid A/B Malfunction (Shift Solenoid Valve No. 1/No. 2)
SYSTEM DESCRIPTION
The ECM uses signals from the vehicle speed sensor to detect the actual gea\
r position (1st, 2nd, 3rd or O/D
gear).
Then the ECM compares the actual gear with the shift schedule in the ECM mem\
ory to detect mechanical
trouble of the shift solenoid valves and valve body.
DTC No.DTC Detecting ConditionTrouble Area
P0750
P0755During normal driving, the gear required by the ECM does not
match the actual gear (2 trip detection logic)Shift solenoid valve No. 1/No. 2 is stuck open or closed
 Valve body is blocked up or stuck
HINT:
Check the shift solenoid valve No. 1 when DTC P0750 is output and check shift\
solenoid valve No. 2 when
DTC P0755 is output.
INSPECTION PROCEDURE
1 Check shift solenoid valve No. 1 or No. 2 operation.
PREPARATION:
(a) Remove the oil pan.
(b) Remove the shift solenoid valve No. 1 or No. 2.
CHECK:
(a) Applying 490 kPa (5 kgf/cm2, 71 psi) of compressed air,
check that the shift solenoid valve does not leak air.
(b) When battery positive voltage is supplied to the shift sole-
noid valves, check they opens.
NG Replace shift solenoid valve No. 1 or No. 2.
OK
2 Check valve body (See page DI−147 ).
NG Repair or replace valve body.
OK
Repair transmission (See page AT −18).
DI5KM−02
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