1996 TOYOTA T100 engine

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DI−281
1996 TOYOTA T100 (RM449U) L4 − E1 (E7, 29 − E5, 16)
R ↔ BRIG switch ON, Transfer L4 position7.5 − 14
IG switch ON, Transfer other than L4 positionBelow 1.5
4WD − E1 (E4, 26 − E5, 16)R−G ↔ BRIG switch ON, Transfer H2 position9 − 14
IG switch ON, Transfer other than H2 positionBelow 3

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DI−282
− DIAGNOSTICSAUTOMATIC TRANSMISSION
1996 TOYOTA T100 (RM449U)
PROBLEM SYMPTOMS TABLE
If a normal code is displayed during the diagnostic trouble code check but the trouble still occurs, check the
circuits for each symptom in the order given in the charts on the following pages and proceed to the page
given for troubleshooting.
The Matrix Chart is divided into 3 chapters.
Chapter 1: Electronic Circuit Matrix Chart
Chapter 2: On−vehicle Repair Matrix Chart
Chapter 3: Off−vehicle Repair Matrix Chart
If the instruction ”Proceed to next circuit inspection shown on matrix chart” is given in the flow
chart for each circuit, proceed to the circuit with the next highest number in the table to continue
the check.
If the trouble still occurs even though there are no abnormalities in any of the other circuits, then
check and replace the ECM.
Chapter 1: Electronic Circuit Matrix Chart
SymptomSuspect AreaSee page
No up−shift
(A particular gear, from 1st to 3rd gear, is not up−shifted)1. ECMDI−279
No up−shift (3rd → O/D)
1. O/D main switch & O/D OFF indicator light circuit
2. O/D cancel signal circuit
3. ECMDI−311
DI−309
DI−279
No down−shift (O/D → 3rd)1. ECMDI−279
No down−shift
(A particular gear, from 1st to 3rd gear, is not up−shifted)1. ECMDI−279
No lock−up1. Stop light swich circuit
2. ECMDI−316
DI−279
No lock−up off1. Stop light swich circuit
2. ECMDI−316
DI−279
Shift point too high or too low1. ECMDI−279
Up−shift to O/D from 3rd while O/D main switch is OFF1. O/D main switch & O/D OFF indicator light circuit
2. ECMDI−311
DI−279
Up−shift to O/D from 3rd while engine is cold1. ECMDI−279
No kick−down1. ECMDI−279
Engine stalls when starting off or stopping1. Stop light swich circuit
2. ECMDI−316
DI−279

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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

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1996 TOYOTA T100 (RM449U) Slip or shudder (Particular position)
1. Throttle cable
2. No.1 gear shifting rod
3. Off−vehicle repair matrix chartDI−265
DI−265
DI−282
No engine braking (1st: L position)1. Low coast modulator valve
2. Off−vehicle repair matrix chart
DI−282
No engine braking (2nd: 2 position)1. 2nd coast modulator valve
2. Off−vehicle repair matrix chart
DI−282
No kick−down1. 1−2 shift valve
2. 2−3 shift valve


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DI−285
1996 TOYOTA T100 (RM449U)
Chapter 3: Off−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 posi-
tion
1. O/D one−way clutch (F0)
2. O/D direct clutch (C
0)
3. O/D planetary gear unit
4. Torque converter clutch



AT−38
Vehicle does not move in R position
1. Front and rear planetary gear unit
2. Direct clutch (C
2)
3. 1st and reverse brake (B
3)
4. O/D direct clutch (C
0)




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 lock−up or No lock−up off1. Torque converter clutchAT−38
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 (N → 2)
1. Forward clutch (C1)
2. O/D one−way clutch (F
0)
3. No. 2 one−way clutch (F
2)



Harsh engagement (N → L)
1. Forward clutch (C1)
2. 1st and reverse brake (B
3)
3. O/D one−way clutch (F
0)
4. No. 2 one−way clutch (F
2)




Harsh engagement (Lock−up)1. Torque converter clutchAT−38
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−38


Slip or shudder (Particular position: Just after engine starts)1. Torque converter clutchAT−38
Slip or shudder (R position)1. Direct clutch (C2)
2. 1st and reverse brake (B
3)


Slip or shudder (1st)1. Forward clutch (C1)
2. No. 2 one−way clutch (F
2)


Slip or shudder (2nd)
1. 2nd brake (B2)
2. 2nd coast brake (B
1)
3. No. 1 one−way clutch (F
1)



Slip or shudder (3rd)1. Direct clutch (C2)
Slip or shudder (O/D)1. O/D brake (B0)
No engine braking (1st ∼ 3rd: D position)1. 2nd brake (B2)
No engine braking (1st: L position)1. 1st and reverse brake (B3)
No engine braking (2nd: 2 position)1. 2nd coast brake (B1)
Poor acceleration (All position)1. Torque converter clutchAT−38
Poor acceleration (O/D)1. O/D direct clutch (C0)
2. O/D planetary gear unit

Engine stalls when starting off or stopping1. Torque converter clutchAT−38

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DI−286
− DIAGNOSTICSAUTOMATIC TRANSMISSION
1996 TOYOTA T100 (RM449U)
CIRCUIT INSPECTION
DTC P0500 Vehicle Speed Sensor Malfunction
(No.1 Vehicle Speed Sensor)
See page 3RZ−FE DI−92, 5VZ−FE DI−226.

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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

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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.