sensor TOYOTA T100 1996 Factory Service Manual

Downloaded from www.Manualslib.com manuals search engine Q07378
O2
2
1E6
E7
E612 21
22
*1 *2
*1: 3RZ−FE
*2: 5VZ−FEE2 OIL4 − 6 V
G−B
BR−BECM
ATF Temp. Sensor
O2
E69 *1 *2
− DIAGNOSTICSAUTOMATIC TRANSMISSION
DI−287
1996 TOYOTA T100 (RM449U)
DTC P0710 Transmission Fluid Temperature Sensor
Malfunction (ATF Temperature Sensor)
CIRCUIT DESCRIPTION
The ATF temperature sensor converts fluid temperature into a resistance value which is input into the ECM.
DTC NoDTC Detecting ConditionTrouble Area
P0710
Either (a) or (b) is detected for 0.5 sec. or more:
(2 trip detection logic)
(a) Temp. sensor resistance is less than 79 Ω
(b) After engine has been operating for 15 minutes or
more, resistance at temp. sensor is more than 156 kΩ
Open or short in ATF temp. sensor circuit
ATF temp. sensor
ECM
WIRING DIAGRAM
DI0VL−02

Downloaded from www.Manualslib.com manuals search engine Q07637
DI−288
− DIAGNOSTICSAUTOMATIC TRANSMISSION
1996 TOYOTA T100 (RM449U)
INSPECTION PROCEDURE
1 Check ATF Temperature Sensor.
PREPARATION:
Remove the ATF temperature sensor.
CHECK:
Measure resistance between terminals of ATF temperature
sensor at 20°C (68°F) and 110°C (230°F).
OK:
Resistance:
20°C (68°F): Approx. 13.0 kΩ
11 0°C (230°F): Approx. 800 Ω
NG Replace ATF temperature sensor.
OK
2 Check harness and connector between ATF temperature sensor and ECM
(See page IN−26).
NG Repair or replace harness or connector.
OK
Check and replace ECM.

Downloaded from www.Manualslib.com manuals search engine Q07640
− DIAGNOSTICSAUTOMATIC TRANSMISSION
DI−289
1996 TOYOTA T100 (RM449U)
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 gear position (1st, 2nd, 3rd or O/D
gear).
Then the ECM compares the actual gear with the shift schedule in the ECM memory to detect mechanical
trouble of the shift solenoid valves and valve body.
DTC No.DTC Detecting ConditionTrouble Area
P0750
P0755During normal driving, gear required by ECM does not match
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 solenoid valve does not leak air.
(b) When battery positive voltage is supplied to the shift sole-
noid valve, check that the solenoid valve opens.
NG Replace shift solenoid valve No.1 or No.2.
OK
2 Check valve body (See page DI−282).
NG Repair or replace valve body.
OK
Repair or replace transmission (See page
AT−26, AT−33).
DI0VM−01

Downloaded from www.Manualslib.com manuals search engine Q06995
Drain
Line
Pressure
Q07640
DI−294
− DIAGNOSTICSAUTOMATIC TRANSMISSION
1996 TOYOTA T100 (RM449U)
DTC P0770 Shift Solenoid E Malfunction
(Shift Solenoid Valve SL)
SYSTEM DESCRIPTION
The ECM uses the signals from the Throttle position sensor,
mass air flow meter and crankshaft position sensor to monitor
the engagement condition of the lock−up clutch.
Then the ECM compares the engagement condition of the
lock−up clutch with the lock−up schedule in the ECM memory
to detect mechanical trouble of the shift solenoid valve SL,
valve body and torque converter clutch.
DTC No.DTC Detecting ConditionTrouble Area
P0770
Lock−up does not occur when driving in the lock−up range
(normal driving at 80 km/h [50 mph]), or lock−up remains ON
in the lock−up OFF range
(2 trip detection logic)Shift solenoid valve SL is stuck open or closed
Valve body blocked up or stuck
Lock−up clutch
INSPECTION PROCEDURE
1 Check solenoid valve SL operation.
PREPARATION:
(a) Remove the oil pan.
(b) Remove the shift solenoid valve SL.
CHECK:
(a) Applying 490 kPa (5 kgf/cm2, 71 psi) of compressed air,
check that the solenoid valve does not leak air.
(b) When battery voltage is supplied to the shift solenoid
valve, check that the solenoid valve opens.
NG Replace solenoid valve SL.
OK
DI0VR−01

Downloaded from www.Manualslib.com manuals search engine D00010
Rotor
No.2 Vehicle Speed SensorRotor
No.2 Vehicle Speed Sensor
ECM
AT8761
0 V
2 msec./div.5 V/div. DI−300
− DIAGNOSTICSAUTOMATIC TRANSMISSION
1996 TOYOTA T100 (RM449U)
DTC P1700 Speed Sensor No.2 Circuit Malfunction
(No.2 Vehicle Speed Sensor) (3RZ−FE)
CIRCUIT DESCRIPTION
The No.2 vehicle speed sensor detects the rotation speed of the transmission output shaft and sends signals
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 rotor 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 vehicle
speed sensor and the throttle position sensor signal.
If the No.2 vehicle speed sensor malfunctions, the ECM uses input signals from the No.1 vehicle speed sen-
sor as a back−up signal.
DTC No.DTC Detecting ConditionTrouble Area
P1700
All conditions below are detected 500 times or more
continuously:
(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
seconds
(c) Park/neutral position switch: OFF (Other than P or N)
Open or short in No.2 vehicle speed sensor circuit
No.2 vehicle speed sensor
ECM
Reference
Wavefrom between terminals SP2
+ and SP2− when vehicle
speed is approx. 60 km/h (37 mph).
DI0VZ−01

Downloaded from www.Manualslib.com manuals search engine Q06835
ECM
SP2
+
SP2−
E5
E5 10
4 BR−R
B−R No.2 Vehicle Speed Sensor V1
V1 1
2
Q08458
SP2−
SP2+
− DIAGNOSTICSAUTOMATIC TRANSMISSION
DI−301
1996 TOYOTA T100 (RM449U)
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 TOYOTA hand−held tester:
PREPARATION:
(a) Connect an OBD II scan tool or TOYOTA hand−held tes-
ter to the DLC3.
(b) Start the engine and OBD II scan tool or TOYOTA 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 resistance between terminals SP2+ and SP2− of ECM.
OK:
Resistance: 560 − 680 Ω
OK Check and replace ECM.
NG

Downloaded from www.Manualslib.com manuals search engine Q08218
Magnet
DI−302
− DIAGNOSTICSAUTOMATIC TRANSMISSION
1996 TOYOTA T100 (RM449U)
2 Check No.2 vehicle speed sensor.
PREPARATION:
Remove the No.2 vehicle speed sensor from the transmission.
CHECK:
(a) Measure resistance between terminals 1 and 2 of vehicle
speed sensor.
(b) Check voltage between terminals 1 and 2 of vehicle
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 voltage generated is extremely low.
NG Replace No.2 vehicle speed sensor.
OK
Check and repair the harness and connector
between ECM and No.2 vehicle speed
sensor (See page IN−26).

Downloaded from www.Manualslib.com manuals search engine Q06437Q06436D00222No.2 Vehicle Speed SensorSensor Rotor
Reed Switch
”ON”
Permanent Magnet
D00251
GND2 V/div.
10 msec. /division
− DIAGNOSTICSAUTOMATIC TRANSMISSION
DI−303
1996 TOYOTA T100 (RM449U)
DTC P1700 Speed Sensor No.2 Circuit Malfunction
(No.2 Vehicle Speed Sensor) (5VZ−FE)
CIRCUIT DESCRIPTION
A rotor with built in permanent magnet is mounted on the output shaft. Every time the output shaft (and thus
the rotor) makes one complete revolution, the permanent magnet acticates the reed switch, which is built
into the No.2 vehicle speed sensor, causing it to generate signal. This shignal, which corresponds to the
governor pressure in a conventional automatic transmission, is sent to the ECM, which uses it in controlling
the shift points and the operation of the look−up clutch.
This sensor outputs one pulse for every one revolution of the output shaft.
If the No.2 vehicle speed sensor malfunctions, the ECM uses input signals from the No.1 vehicle speed sen-
sor as a back−up signal.
DTC No.DTC Detecting ConditionTrouble Area
P1700
All conditions below are detected 500 times or more
continuously:
(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
seconds
(c) Park/neutral position switch: OFF (Other than P or N)
(d) Transfer position: Other than N position (A340F only)
Open or short in No.2 vehicle speed sensor circuit
No.2 vehicle speed sensor
ECM
Reference
Wavefrom between terminals SP2 and E1 when vehicle speed
is approx. 60 km/h (37 mph).
DI0W1−01

Downloaded from www.Manualslib.com manuals search engine Q06836
No.2 Vehicle
Speed SensorBR−R
BR
BR
SP2
E1ECM
E5 E6
V1
V1
4 − 6 V
EB
2
19
16
BR
Q07653
E1
SP2
DI−304
− DIAGNOSTICSAUTOMATIC TRANSMISSION
1996 TOYOTA T100 (RM449U)
WIRING DIAGRAM
INSPECTION PROCEDURE
1 Check vehicle speed value or resistance between terminals SP2 and E1 of ECM.
When using OBD II scan tool or TOYOTA hand−held tester:
PREPARATION:
(a) Connect an OBD II scan tool or TOYOTA hand−held tes-
ter to the DLC3.
(b) Start the engine and OBD II scan tool or TOYOTA 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:
(a) Disconnect the connector from the ECM.
(b) Shift the shift lever to N position.
(c) Jack up the rear wheels on one side.
CHECK:
Check that there is continuity between terminals SP2 and E1
of ECM while slowly turning the jacked−up wheel by hand.
OK:
Resistance: Changes between 0 Ω and ∞ Ω
OK Check and replace ECM.
NG

Downloaded from www.Manualslib.com manuals search engine Q07654
Magnet
− DIAGNOSTICSAUTOMATIC TRANSMISSION
DI−305
1996 TOYOTA T100 (RM449U)
2 Check No.2 vehicle speed sensor.
PREPARATION:
Remove the No.2 vehicle speed sensor from the transmission.
CHECK:
Check that there is continuity between terminals of No.2 vehicle
speed sensor connector when a magnet is put close to it as
shown.
OK:
Resistance: Changes between 0 Ω and ∞ Ω
NG Replace No.2 vehicle speed sensor.
OK
Check and repair harness and connector between ECM and No.2 vehicle speed sensor
(See page IN−26). Check and repair sensor rotor.