1996 TOYOTA LAND CRUISER Workshop Manual

Q07647
SL
Q07649
Q07312D00088
SLSL
DI−164
−
DIAGNOSTICS AUTOMATIC TRANSMISSION
1996 LAND CRUISER (RM451U)
INSPECTION PROCEDURE
1 Measure resistance between terminal SL of ECM and body ground.
PREPARATION:
Disconnect the connector from the ECM.
CHECK:
Measure the resistance between terminal SL of the ECM and
body ground.
OK:
Resistance: 11 − 15 Ω
OK Check and replace ECM.
NG
2 Check harness and connector between ECM and automatic transmission sole-\
noid connector.
PREPARATION:
Disconnect the solenoid connector from the transmission.
CHECK:
Check the harness between terminal SL of the ECM and termi-
nal SL of the automatic transmission solenoid connector.
OK:
There is no open or short circuit.
NG Repair or replace harness or connector.
OK
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Q08224 Q08222D00083
−
DIAGNOSTICS AUTOMATIC TRANSMISSION
DI−165
1996 LAND CRUISER (RM451U)
3 Check shift solenoid valve SL.
PREPARATION:
(a) Jack−up the vehicle.
(b) Remove the oil pan.
(c) Disconnect the shift solenoid valve SL connector.
(d) Remove the shift solenoid valve SL.
CHECK:
(a) Measure the resistance between the shift solenoid valve
SL connector terminal and its body ground.
(b) Connect positive  lead to terminal of the solenoid con-
nector, negative  lead to the solenoid body.
OK:
(a) Resistance: 11 − 15 Ω
(b) Shift solenoid valve SL makes operation noise.
NG Replace shift solenoid valve SL.
OK
Check and replace or repair solenoid wire.
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Q07352 AT5605D00084
Rotor
No. 2 Vehicle Speed Sensor Rotor
No. 2 Vehicle Speed Sensor
AT8761
5 V/div.
0 V
2 msec./div.
DI−166
−
DIAGNOSTICS AUTOMATIC TRANSMISSION
1996 LAND CRUISER (RM451U)
DTC P1700 Speed Sensor No. 2 Circuit Malfunction
(No. 2 Vehicle Speed Sensor)
CIRCUIT DESCRIPTION
The No. 2 vehicle speed sensor detects the rotation speed of the transmissi\
on output shaft and sends sig-
nals to the ECM. The ECM determines the vehicle speed based on these signals\
.
An AC voltage is generated in the No. 2 vehicle speed sensor coil as the r\
otor mounted on the output shaft
rotates, and this voltage is sent to the ECM.
The gear shift point and lock −up timing are controlled by the ECM based on the signals from this vehic\
le
speed sensor and the throttle position sensor signal.
If the No. 2 vehicle speed sensor malfunctions, the ECM uses input signa\
ls from the No. 1 vehicle speed
sensor as a back −up signal.
DTC No.DTC Detecting ConditionTrouble Area
P1700
All conditions below are detected 500 times or more continu-
ously (2 trip detection logic)
(a) No signal from No. 2 vehicle speed sensor is input to ECM while 4 pulses of No. 1 vehicle speed sensor signal is sent
(b) Vehicle speed: 9 km/h (5.6 mph) or more for as least 4 sec.
(c) Park/neutral position switch: OFF (Other than P or N posi-
tion)
(d) Transfer position: Other than N position
 Open or short in No. 2 vehicle speed sensor circuit
 No. 2 vehicle speed sensor
 ECM
Reference:
Waveform between terminals SP2
+ and SP2− when the vehicle
speed is approx. 60 km/h (37 mph).
DI5KW−02
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Q07465
SP2−
1
2E6
ECM
No. 2 Vehicle Speed Sensor SP2
+
4
EC2
5
V
V−G EC2 E682
V
V−G
Q08227
SP2+SP2−
−
DIAGNOSTICS AUTOMATIC TRANSMISSION
DI−167
1996 LAND CRUISER (RM451U)
WIRING DIAGRAM
INSPECTION PROCEDURE
1 Check vehicle speed value or resistance between terminals SP2+ and SP2− of
ECM.
When using OBD II scan tool or T OYOTA hand−held tester:
PREPARATION:
(a) Remove the fuse box cover.
(b) Connect an OBD II scan tool or TOYOTA hand− held tes-
ter to the DLC3.
(c) Start the engine and turn the OBD II scan tool or T OYOTA
hand −held tester main switch ON.
CHECK:
Drive the vehicle and read vehicle speed value.
OK:
Vehicle speed matches tester speed value.
When not using OBD II scan tool or TOYOTA hand−held tes-
ter:
PREPARATION:
Disconnect the connector from the ECM.
CHECK:
Check the resistance between terminals SP2+ and SP2− of the
ECM.
OK:
Resistance: 560 − 680 Ω
OK Check and replace ECM.
NG
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Q08218D00179
DI−168
−
DIAGNOSTICS AUTOMATIC TRANSMISSION
1996 LAND CRUISER (RM451U)
2 Check No. 2 vehicle speed sensor.
PREPARATION:
Remove the No. 2 vehicle speed sensor from the transmission.
CHECK:
(a) Measure the resistance between terminals 1 and 2 of the
vehicle speed sensor.
(b) Check the voltage between terminals 1 and 2 of the ve- hicle speed sensor when a magnet is put close to the front
end of the vehicle speed sensor then taken away quickly.
OK:
(a) Resistance: 560 − 680 Ω
(b) Voltage is generated intermittently.
HINT:
The generated voltage is extremely low.
NG Replace No. 2 vehicle speed sensor.
OK
Check and repair harness and connector be-
tween ECM and No. 2 vehicle speed sensor
(See page IN−28 ).
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Q08577D00180
ECM
Combination Meter
Battery
Park/Neutral
Position Switch
Fuse Block
Starter
From
Battery L
2
R
NSW
E717
16 15
C12
G−W
E7E7
E7
L
R
2
C12
C12
R−B R−B
G−W
O
O
IH2
B−W 22
43
1
2B−W
IG1
ST1 2 4
AM1
2
2
2 2
1
2
AM1
3
J4
EA2 1 8
GAUGE
W
B F6
FLAM1
B+
IH2
IH1 IH1
B−L
B
6
Ignition Switch
4 R/B No. 2
6
6
B
B
Y
Y
15
B−R
B−WO
G−R R−B
S1
S2
10 4
11
2
3
21 7
Y
B−Y 1
−
DIAGNOSTICS AUTOMATIC TRANSMISSION
DI−169
1996 LAND CRUISER (RM451U)
DTC P1780 Park/Neutral Position Switch Malfunction
CIRCUIT DESCRIPTION
The park/neutral position switch detects the shift lever position and sends\
signals to the ECM.
The ECM receives signals (NSW, R, 2 and L) from the park/neutral position switch. When the signal is\
not
sent to the ECM from the park/neutral position switch, the ECM judges th\
at the shift lever is in D position.
DTC No.DTC Detection ConditionTrouble Area
P1780
2 or more switches are ON simultaneously for N, 2 and L posi-
tions (2 trip detection logic)
Short in park/neutral position switch circuit
 Park/neutral position switch
 ECMWhen driving under conditions (a), (b) and (c) for 30 sec. or
more, the park/neutral position switch is ON (N position)
(2 trip detection logic)
(a) Vehicle speed: 70 km/h (44 mph) or more
(b) Engine speed: 1,500 − 2,500 rpm
(c) Engine load: 0.6 g/rev. or more
WIRING DIAGRAM
DI5KY−02
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BE3840
Q08479D00090
ON
(−)
(+)
NSWR
2
L
Position
P, NR
D
2
L NSW
−
Body ground R −

Body ground 2 −

Body ground L −

Body ground
Below 1.5 V
7.5 − 14 V
7.5 −
14 V*
7.5 − 14 V
Below 1.5 V
Below 1.5 V
Below 1.5 V Below1.5 V
Below 1.5 V
Below 1.5 V Below1.5 V
Below 1.5 V
9 − 14 V
Below 1.5 V
Below 1.5 V
Below 1.5 V
9 −
14 V
9 − 14 V
9 − 14 V Below 1.5 V
DI−170
−
DIAGNOSTICS AUTOMATIC TRANSMISSION
1996 LAND CRUISER (RM451U)
INSPECTION PROCEDURE
1 Read PNP, REVERSE, 2ND and LOW signals.
When using TOYOTA hand −held tester:
PREPARATION:
(a) Remove the fuse box cover.
(b) Connect a TOYOTA hand−held tester to the DLC3.
(c) Turn the ignition switch ON and TOYOTA hand−held tes-
ter main switch ON.
CHECK:
Shift lever into the P, R, N, 2 and L positions, and read the PNP,
REVERSE, 2 and L signals on the TOYOTA hand −held tester.
OK:
Shift positionSignal
22ND OFF → ON
LLOW OFF → ON
RREVERSE OFF → ON
P, NPNP SW OFF → ON
When not using TOYOTA hand −held tester:
PREPARATION:
Turn the ignition switch ON.
CHECK:
Measure the voltage between terminals NSW, 2 and L of ECM
and body ground when the shift lever is shifted to the following
positions.
OK:
*: The voltage will drop slightly due to lighting up of the back up
light.
OK Check and replace ECM.
NG
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Q07657D00109
−
DIAGNOSTICS AUTOMATIC TRANSMISSION
DI−171
1996 LAND CRUISER (RM451U)
2 Check park/neutral position switch.
PREPARATION:
(a) Jack up the vehicle.
(b) Remove the park/neutral position switch connector.
CHECK:
Check the continuity between each terminal shown below when
the shift lever is moved to each position.
OK:
Shift PositionTerminal No. to continuityTerminal No. to continuity
P4 − 75 − 6
R4 − 8−
N4 − 105 − 6
D4 − 9−
22 − 4−
L3 − 4−
NG Replace park/neutral position switch.
OK
Repair or replace harness and connector between battery and park/neutral posit\
ion switch, and
park/neutral position switch and ECM (See page IN−28).
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