1996 TOYOTA LAND CRUISER Speed sensor

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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N09348
Interface BoxHarness VehicleTOYOTA
Tester
Hand
−held
TOYOTA Break −out− box
F00007
DLC1
Ts Tc
E
1
BR3904
0.25 sec. 0.25 sec.
ON
OFF
DI−192
−
DIAGNOSTICS ANTI−LOCK BRAKE SYSTEM
1996 LAND CRUISER (RM451U)
(d) Using TOYOTA break −out− box and TOYOTA hand− held
tester, measure the ECU terminal values.
(1) Hook up the T OYOTA hand−held tester and TOYO-
TA break−out−box to the vehicle.
(2) Read the ECU input/output values by following the prompts on the tester screen.
HINT:
TOYOTA hand −held tester has a ”Snapshot ” function. This re-
cords the measured values and is effective in the diagnosis of
intermittent problems.
Please refer to the TOYOTA hand−held tester/TOYOTA break
out−box operators manual for further details.
2. SPEED SENSOR SIGNAL AND DECELERATION SEN-
SOR CHECK
(a) Check the speed sensor signal. (1) Conform that the center differential is free.
(2) Turn the ignition switch OFF.
(3) Using SST, connect terminals Ts and E
1 of the
DLC1.
SST 09843−18020
(4) Start the engine.
(5) Check that the ABS warning light blinks.
HINT:
If the ABS warning light does not blink, inspect the ABS warning
light circuit (See page DI−230).
(6) Drive vehicle straight forward.
HINT:
Drive vehicle faster than 45 km/h (28 mph) for several seconds.
(7) Stop the vehicle.
(8) Using SST, connect terminals Tc and E
1 of the
DLC1.
SST 09843−18020
(9) Read the number of blinks of the ABS warning light.
HINT:
See the list of DTC on page DI−190 .
If every sensor is normal, a normal code is output (A cycle of
0.25 sec. ON and 0.25 sec. OFF is repeated).
If 2 or more malfunction are indicated at the same time, the low-
est numbered code will be displayed 1st.
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−
DIAGNOSTICS ANTI−LOCK BRAKE SYSTEM
DI−195
1996 LAND CRUISER (RM451U)
(d) Check the DTC of speed sensor function.
Code No.DiagnosisTrouble Area
71Low output voltage of right front speed sensor
Right front speed sensor
 Sensor installation
 Sensor rotor
 Sensor wire harness
72Low output voltage of left front speed sensor
Left front speed sensor
 Sensor installation
 Sensor rotor
 Sensor wire harness
73Low output voltage of right rear speed sensor
Right rear speed sensor
 Sensor installation
 Sensor rotor
 Sensor wire harness
74Low output voltage of left rear speed sensor
Left rear speed sensor
 Sensor installation
 Sensor rotor
 Sensor wire harness
75Abnormal change in output voltage of right front speed sen-
sorRight front speed sensor rotor
 Sensor wire harness
76Abnormal change in output voltage of left front speed sen-
sorLeft front speed sensor rotor
 Sensor wire harness
77Abnormal change in output voltage of right rear speed sen-
sorRight rear speed sensor rotor
 Sensor wire harness
78Abnormal change in output voltage of left rear speed sensorLeft rear speed sensor rotor
 Sensor wire harness
79Deceleration sensor is faultyDeceleration sensor
 Sensor installation
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DI5LW−03
DI−196
−
DIAGNOSTICS ANTI−LOCK BRAKE SYSTEM
1996 LAND CRUISER (RM451U)
DIAGNOSTIC TROUBLE CODE CHART
NOTICE:
When removing the part, turn the ignition switch OFF.
HINT:
Using SST 09843 −18020, connect the terminals Tc and E1, and remove the short pin.
If any abnormality is not found when inspection parts, inspect the ECU.
If a malfunction code is displayed during the DTC check, check the circu\
it listed that the code. For details
of each code, turn to the page referred to under the ”See page” for respective ”DTC N\
o.” in the DTC chart.
DTC No.
(See page)Detection Item Trouble Area
11
( DI−201 )Open circuit in ABS control (solenoid) relay circuitABS control (solenoid) relay
 Open or short in ABS control (solenoid) relay circuit
12
( DI−201 )Short circuit in ABS control (solenoid) relay circuitABS control (solenoid) relay
 B+ short in ABS control (solenoid) relay circuit
13
( DI−204 )Open circuit in ABS control (motor) relay circuitABS control (motor) relay
 Open or short in ABS control (motor) relay circuit
14
( DI−204 )Short circuit in ABS control (motor) relay circuitABS control (motor) relay
 B+ short in ABS control (motor) relay circuit
21
( DI−207 )Open or short circuit in 3 −position solenoid circuit for right front
wheel ABS actuator
 Open or short in SFR circuit
22
( DI−207 )Open or short circuit in 3− position solenoid circuit for left front
wheel ABS actuator
 Open or short in SFLcircuit
23
( DI−207 )Open or short circuit in 3− position solenoid circuit for rear
wheel ABS actuator
 Open or short in SRR circuit
31
( DI−210 )Right front wheel speed sensor signal malfunction
Right front, left front, right rear and left rear speed sensor
 Open or short in each speed sensor circuit
 Senser rotor32
( DI−210 )Left front wheel speed sensor signal malfunction
33
( DI−210 )Right rear wheel speed sensor signal malfunction
34
( DI−210 )Left rear wheel speed sensor signal malfunction
35
( DI−210 )Open circuit in left front or right rear speed sensor circuitOpen in left front or right rear speed sensor circuit
36
( DI−210 )Open circuit in right front or left rear speed sensor circuitOpen in right front or left rear speed sensor circuit
41
( DI−215 )Low battery positive voltage or abnormally high battery
positive voltageBattery
 IC regulator
 Open or short in power source circuit
43
( DI−218 )Malfunction in deceleration sensorDeceleration sensor
 Wire harness for deceleration sensor circuit
44
( DI−219 )Open or short in deceleration sensor circuitDeceleration sensor
 Open or short in deceleration sensor circuit
48
( DI−221 )Open or short circuit in center differential lock circuit
Center differential is lockingCenter differential lock
 Center differential lock circuit
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DI5LX−02
W03004
Rear Speed Sensor
Rear Speed Sensor Rotor
Front Speed Sensor
Stop Light Switch
ABS Warning Light
Deceleration Sensor
DLC1
ABS ECU
ABS Actuator
ABS Relay
Front Speed Sensor Rotor
DI−198
−
DIAGNOSTICS ANTI−LOCK BRAKE SYSTEM
1996 LAND CRUISER (RM451U)
PARTS LOCATION
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DI5LZ−03
DI−200
−
DIAGNOSTICS ANTI−LOCK BRAKE SYSTEM
1996 LAND CRUISER (RM451U)
PROBLEM SYMPTOMS TABLE
If a normal code is displayed during the DTC check but the problem still o\
ccurs, check the circuits for each
problem symptom in the order given in the table below and proceed to the releva\
nt troubleshooting page.
SymptomsSuspected AreaSee page
ABS does not operate
Only when 1 − 4 are all normal and the problem is still occurring, replace the ABS
ECU
2. Check the DTC reconfirming that the normal code is output
3. IG power source circuit
4. Speed sensor circuit
5. Check the ABS actuator with a checker
If abnormal, check the hydraulic circuit for leakage (See page DI−237)
DI−190
DI−215
DI−210
BR−53
ABS does not operate effi-
ciently
Only when 1 − 4 are all normal and the problem is still occurring, replace the ABS
ECU
1. Check the DTC reconfirming that the normal code is output
2. Speed sensor circuit
3. Stop light switch circuit
4. Check the ABS actuator with a checker
If abnormal, check the hydraulic circuit for leakage (See page DI−237)
DI−190
DI−210
DI−228
BR−53
ABS warning light abnormal1. ABS warning light circuit
2. ABS ECUDI−230 −
DTC check cannot be done
Only when 1 and 2 are all normal and the problem is still occurring, rep\
lace the
ABS ECU
1. ABS warning light circuit
2. Tc terminal circuit
DI−230
DI−233
Speed sensor signal check
cannot be done1. Ts terminal circuit
2. ABS ECUDI−235−
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