1996 TOYOTA T100 relay

Downloaded from www.Manualslib.com manuals search engine − DIAGNOSTICSAUTOMATIC TRANSMISSION
DI−283
1996 TOYOTA T100 (RM449U)
Chapter 2: On−Vehicle Repair Matrix Chart
(: A340E, A340F, A340H AUTOMATIC TRANSMISSION Repair Manual Pub. No. RM391U)
(: A340F, A343F AUTOMATIC TRANSMISSION Repair Manual Pub. No. RM479U)
SymptomSuspect AreaSee page
Vehicle does not move in any forward position and reverse
position
1. Throttle cable
2. No.1 gear shifting rod
3. Manual valve
4. Parking lock pawl
5. Off−vehicle repair matrix chartDI−265
DI−265

AT−17
DI−282
Vehicle does not move in R position1. Off−vehicle repair matrix chartDI−282
Vehicle does not move in particular position or positions
(except R position)1. Off−vehicle repair matrix chartDI−282
No up−shift (1st → 2nd)1. 1−2 shift valve
2. Off−vehicle repair matrix chart
DI−282
No up−shift (2nd → 3rd)1. 2−3 shift valve
2. Off−vehicle repair matrix chart
DI−282
No up−shift (3rd → O/D)1. 3−4 shift valve
2. Off−vehicle repair matrix chart
DI−282
No down−shift (O/D → 3rd)1. 3−4 shift valve
2. Off−vehicle repair matrix chart
DI−282
No down−shift (3rd → 2nd)1. 2−3 shift valve
2. Off−vehicle repair matrix chart
DI−282
No down−shift (2nd → 1st)1. 1−2 shift valve
2. Off−vehicle repair matrix chart
DI−282
No lock−up or No lock−up off1. Lock−up relay valve
2. Off−vehicle repair matrix chart
DI−282
Harsh engagement (N → D)1. Accumulator control valve
2. Off−vehicle repair matrix chart
DI−282
Harsh engagement (Lock−up)1. Lock−up relay valve
2. Off−vehicle repair matrix chart
DI−282
Harsh engagement (N → R)
1. Accumulator control valve
2. C
2 accumulator
3. Off−vehicle repair matrix chart


DI−282
Harsh engagement (N → L)1. Low coast modulator valve
Harsh engagement (2nd → 3rd → O/D)1. Cut−back valve
Harsh engagement (1st → 2nd → 3rd → O/D)1. Throttle valve
2. Actuator control valve

Harsh engagement (2nd → 3rd)
1. Accumulator control valve
2. C
2 accumulator
3. Off−vehicle repair matrix chart


DI−282
Harsh engagement (3rd → O/D)
1. Accumulator control valve
2. B
0 accumulator
3. Off−vehicle repair matrix chart


DI−282
Harsh engagement (O/D → 3rd)
1. Accumulator control valve
2. C
0 accumulator
3. Off−vehicle repair matrix chart


DI−282
Slip or shudder (Forward and reverse)
1. Throttle cable
2. No.1 gear shifitng rod
3. Oil strainer
4. Pressure relief valve
5. Off−vehicle repair matrix chartDI−265
DI−265
AT−12

DI−282

Downloaded from www.Manualslib.com manuals search engine Q07379
Transmission
Shift Solenoid
Valve SL
Y
E23
Y−BB+
SL 27 8
E7
E7
*1 *2
*1: 3RZ−FE
*2: 5VZ−FEECM DI−296
− DIAGNOSTICSAUTOMATIC TRANSMISSION
1996 TOYOTA T100 (RM449U)
DTC P0773 Shift Solenoid E Electrical Malfunction
(Shift Solenoid Valve SL)
CIRCUIT DESCRIPTION
The shift solenoid valve SL is turned ON and OFF by signals from the ECM to control the hydraulic pressure
acting on the lock−up relay valve, which then controls operation of the lock−up clutch.
Fail safe function:
If the ECM detects a malfunction, it turns the shift solenoid valve SL OFF.
DTC No.Detection ItemDTC Detecting ConditionTrouble Area
P0773
Either (a) or (b) are detected for 1 time:
(2 trip detection logic)
(a) Solenoid resistance is 8 Ω or less (short circuit) when sole-
noid is energized
(b) Solenoid resistance is 100 kΩ or more (open circuit) when
solenoid is not energized
Open or short in shift solenoid valve SL circuit
Shift solenoid valve SL
ECM
WIRING DIAGRAM
DI0VU−01

Downloaded from www.Manualslib.com manuals search engine Q10012
ECM Combination Meter
Park/Neutral
Position Switch
Dio
Diode
Ignition Switch
Integration
Relay J/B No.1
Starter
Relay
R/B No.2 R/B No.2
Battery
GAUGECIG
ACC
IG1
NSW
AM1ALTB+ E4
E4
E4L
2
R R2L
15
16
17
E4 E7 26
5C12 C12 C12
P1
P1P1
P1
P1
P1
IE2
IE2
IE2 IE2
IE1
IA3
1A 1AIE1
R−B P−G
V−W
R−W P−G V−W
R−B
P−GV−W
B−O
B−Y
B−O
B−Y B−Y
B−O B−O GR−R
B−O
WW WW W
BB
W−B L−R
B−Y
B−O B−Y
B−O B−Y
33
2
6
8
616 17
154
5 3
12
2
2 6
5
22 21
3
2 4
2
11
9
1 2
14AM1 ST1
*1
3
2
1
*1
*1*2
*2
*2 *1
*1 *1*2
*2
*2
*1
*2 *1
*2
IC
*1
*2
22
3RZ−FE
5VZ−FE
*1
*2
14 22 DI−306
− DIAGNOSTICSAUTOMATIC TRANSMISSION
1996 TOYOTA T100 (RM449U)
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 that the shift lever is in D position.
DTC No.DTC Detection ConditionTrouble Area
P1780
2 or more switches are ON simultaneously for R, N, 2 and L
positions
(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 seconds
or more, 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
WIRING DIAGRAM
DI0W5−02

Downloaded from www.Manualslib.com manuals search engine Q10013
*O/D Main Switch
Contacts go open with switch pushed in.
Contacts go closed with switch pushed once again.
*1: 3RZ−FE
*2: 5VZ−FEO/D OFF Indicator Light
(Combination Meter)
Integration
Relay Ignition Switch
R/B No.2 R/B No.2J/B No.1ECM
GAUGE
Battery AM1
IG1
ALT AM1B+
OD2 B−YB−OY−G
W W
WW 65
2222
2 1 199 2
3
1A
141
2O3
O3E4
C13 C12
IA3
875
6
Y−G
W−B
IC
*1
*2
*
O/D
Main
Switch
− DIAGNOSTICSAUTOMATIC TRANSMISSION
DI−311
1996 TOYOTA T100 (RM449U)
O/D Main Switch & O/D OFF Indicator Light Circuit
CIRCUIT DESCRIPTION
The O/D main switch contacts go open when the switch is pushed in and go closed when it is pushed out.
In O/D main switch at OFF position, the O/D OFF indicator light lights up, and the ECM prohibits shifting O/D.
WIRING DIAGRAM
DI0WD−02

Downloaded from www.Manualslib.com manuals search engine DI0ZQ−03
DI−326
− DIAGNOSTICSANTI−LOCK BRAKE SYSTEM
1996 TOYOTA T100 (RM449U)
DIAGNOSTIC TROUBLE CODE CHART
HINT:
Using SST 09843−18020, connect terminals Tc and E
1, and remove the short pin.
If a malfunction code is displayed during the DTC check, check the circuit listed that the code. For details
of each code, turn to the page referred to under the ”See Page” for respective ”DTC No.” in the DTC chart.
DTC No.
(See Page)Detection ItemTrouble Area
11
(DI−332)Open circuit in ABS control (solenoid) relay circuit
ABS control (solenoid) relay
Open or short in ABS control (solenoid) relay circuit
ECU
12
(DI−332)Short circuit in ABS control (solenoid) relay circuit
ABS control (solenoid) relay
B+ short in ABS control (solenoid) relay circuit
ECU
13
(DI−335)Open circuit in ABS control (motor) relay circuit
ABS control (motor) relay
Open or short in ABS control (motor) relay circuit
ECU
14
(DI−335)Short circuit in ABS control (motor) relay circuit
ABS control (motor) relay
B+ short in ABS control (motor) relay circuit
ECU
21
(DI−338)Open or short circuit in 2−position solenoid circuit for right front
wheelABS actuator
Open or short in SFRR or SFRH circuit
ECU
22
(DI−338)Open or short circuit in 2−position solenoid circuit for left front
wheelABS actuator
Open or short in SFLR or SFLH circuit
ECU
23
(DI−338)Open or short circuit in 2−position solenoid circuit for rear
wheelABS actuator
Open or short in SRR or SRH circuit
ECU
31
(DI−341)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
ECU
32
(DI−341)Left front wheel speed sensor signal malfunction
33
(DI−341)Right rear wheel speed sensor signal malfunction
34
(DI−341)Left rear wheel speed sensor signal malfunction
35
(DI−341)Open circuit in left front or right rear wheel speed sensor.
36
(DI−341)Open circuit in right front or left rear wheel speed sensor.
37
(DI−345)Neither front speed sensor rotor missing
Front axle hub
Right front, left front speed sensor
Wire harness for sensor system
ECU
37
(DI−346)Some tire is different size from the other tiresTire size
ECU
41
(DI−347)Low battery positive voltage or abnormally high battery
positive voltage
Battery
IC regulator
Open or short in power source circuit
ECU

Downloaded from www.Manualslib.com manuals search engine DI103−03
F14589
ABS Contorl Relay
ABS ActuatorABS ECU
R/B
No.2Motor
Relay
Solenoid
Relay
ABS ECUDLC1
ABS
Battery
A16
A16
A16
A16
A16 A6
A6
A5
A4
A4 A4
A4 A5
A6 A6
A5
A5
A4 EA1
EA1
ID
MR
R−
SR
AST
MT R−B
G−B
R−W
R−Y
R−L W−B
W−B W
W W
W
W
R−L
W−R
LG
4
15
5 4
3
1
3
5 1
2
6
1 5 10
10 2
2
92
25
4
11
8
DI−332
− DIAGNOSTICSANTI−LOCK BRAKE SYSTEM
1996 TOYOTA T100 (RM449U)
CIRCUIT INSPECTION
DTC 11, 12 ABS Control (Solenoid) Relay Circuit
CIRCUIT DESCRIPTION
This relay supplies power to each ABS solenoid. After the ignition switch is turned ON, if the initial check is
OK, the relay goes on.
DTC No.DTC Detecting ConditionTrouble Area
11
Conditions 1 and 2 continue for 0.2 sec. or more:
1. ABS control (solenoid) relay terminal (SR) voltage:
Battery positive voltage
2. ABS control (solenoid) relay monitor terminal (AST)
voltage: 0V
ABS control (solenoid) relay
Open or short in ABS control (solenoid) relay circuit
ECU
12
Conditions 1 and 2 continue for 0.2 sec. or more:
1. ABS control (solenoid) relay terminal (SR) voltage: 0 V
2. ABS control (solenoid) relay monitor terminal (AST)
voltage: Battery positive voltage
ABS control (solenoid) relay
B+ short in ABS control (solenoid) relay circuit
ECU
Fail safe function:
If trouble in the ABS control (solenoid) relay circuit, the ECU cuts off current to the ABS control (solenoid)
relay and prohibits ABS control.
WIRING DIAGRAM

Downloaded from www.Manualslib.com manuals search engine BE6653
R14203
F00001
LOCK
2
6 A5
R13727
5
4
3
11 ABS Control
Relay
ABS
Actuator
ABS ECUA4
A4A4 A4
A16
A5
− DIAGNOSTICSANTI−LOCK BRAKE SYSTEM
DI−333
1996 TOYOTA T100 (RM449U)
INSPECTION PROCEDURE
1 Check voltage between terminals A5 − 2 and A5 − 6 of ABS control relay
connector.
PREPARATION:
Disconnect the ABS control relay connector.
CHECK:
Measure the voltage between terminals A5 − 2 and A5 − 6 of
ABS control relay harness side connector.
OK:
Voltage: 10 − 14 V
NG Check and repair harness or connector.
OK
2 Check continuity between terminals A5 − 5 and A4 − 4, A4 − 4 and A4 − 3, A4 − 3
and A16 − 11 .
PREPARATION:
Disconnect the 2 connectors from the ABS actuator.
CHECK:
Check continuity between terminals A5 − 5 and A4 − 4, A4 − 4
and A4 − 3, A4 − 3 and A16 − 11 .
OK:
Continuity
HINT:
There is a resistance of 26 ∼ 40 Ω between terminals A4 − 4 and
A4 − 3.
NG Repair or replace harness or ABS actuator.
OK

Downloaded from www.Manualslib.com manuals search engine R14139
Continuity
Open
Continuity
1 2
6 3 A6A5
5
R14140
(−)
(+)
Continuity
Open
36
51 2
A6A5
DI−334
− DIAGNOSTICSANTI−LOCK BRAKE SYSTEM
1996 TOYOTA T100 (RM449U)
3 Check ABS control (solenoid) relay.
CHECK:
Check continuity between each terminal of ABS control (sole-
noid) relay.
OK:
Terminals A5 − 1 and A6 − 3Continuity (Reference value 80 Ω)
Terminals A5 − 5 and A5 − 6Continuity
Terminals A5 − 2 and A5 − 5Open
CHECK:
(a) Apply battery positive voltage between terminals A5 − 1
and A6 − 3.
(b) Check continuity between each terminal of ABS control
(solenoid) relay.
OK:
Terminals A5 − 5 and A5 − 6Open
Terminals A5 − 2 and A5 − 5Continuity
NG Replace ABS control relay.
OK
4 Check for open and short in harness and connector between ABS control relay
and ABS ECU (See page IN−26).
NG Repair or replace harness or connector.
OK
If same code is still output after DTC is deleted, check contact condition of each connection.
If connections are normal, ECU may be defective.