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DI-1136 DIAGNOSTICS - AUTOMATIC TRANSMISSION (A750E/A750F for
2UZ-FE)
DIDWB-01
PROBLEM SYMPTOMS TABLE
HINT:
If a normal code is displayed during the diagnostic trouble code check although the trouble still occurs, check
the electrical 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.
1. Chapter 1: Electronic Circuit Matrix Chart
S Refer to the table below when the trouble cause is considered to be electrical.
S If the instruction "Proceed to next circuit inspection shown on matrix chart" is given in the flow chart
of each circuit, proceed to the circuit with the next highest number in the table to continue the check.
S If the trouble still occurs even though there are no abnormalities in any of the other circuits, check and
replace the ECM.
HINT:
*1: When the circuit on which mark *1 is attached is defective, DTC could be output (see page DI-1156).
Symptom Suspect Area See page
1. Shift solenoid valve (S1) circuit *1 DI-1226
No up-shift
2. Shift solenoid valve (S2) circuit *1 DI-1231
(A particular gear, from 1st to 4th gear, is not up-shifted)
3. ECM IN-30
1. O/D main switch circuit DI-1274
2. Engine coolant temp. sensor circuit *1 DI-477
3. Speed sensor NT circuit *1 DI-1175
No up-shift (4th 5th) 4. Shift solenoid valve (SL1) circuit *1 DI-1188
5. Shift solenoid valve (SL2) circuit *1 DI-1216
6. Shift solenoid valve (SR) circuit *1 DI-1236
7. ECM IN-30
1. Engine coolant temp. sensor circuit *1 DI-477
No up-shift (3rd 4th) 2. Shift solenoid valve (S2) circuit *1 DI-1231
3. ECM IN-30
1. Shift position L switch circuit *1 DI-1277
No up-shift (1st 2nd) 2. Shift solenoid valve (S2) circuit *1 DI-1231
3. ECM IN-30
1. O/D main switch circuit DI-1274
2. Shift solenoid valve (SL1) circuit *1 DI-1188
No down-shift (5th 4th) 3. Shift solenoid valve (SL2) circuit *1 DI-1216
4. Shift solenoid valve (SR) circuit *1 DI-1236
5. ECM IN-30
1. Shift position L switch circuit DI-1277
No down-shift (2nd 1st) 2. Shift solenoid valve (S2) circuit *1 DI-1231
3. ECM IN-30
1. Shift solenoid valve (S1) circuit *1 DI-1226
No down-shift
2. Shift solenoid valve (S2) circuit *1 DI-1231
(A particular gear, from 1st to 4th gear, is not down-shifted)
3. ECM IN-30
1. ATF temperature sensor circuit *1 DI-1166
2. Stop light switch circuit *1 DI-1184
3. Speed sensor NT circuit *1 DI-1175
No lock-up
4. Shift solenoid valve (SLU) circuit *1 DI-1265
5. Engine coolant temp. sensor circuit *1 DI-477
6. ECM IN-30
1. Shift solenoid valve (SLU) circuit *1 DI-1265
No lock-up off
2. ECM IN-30
DIAGNOSTICS - AUTOMATIC TRANSMISSION (A750E/A750F for DI-1137
2UZ-FE)
1. Shift solenoid valve (SLT) circuit *1 DI-1247
2. Speed sensor NT circuit *1 DI-1175
3. Speed sensor SP2 circuit *1 DI-1180
Shift point too high or too low
4. Throttle position sensor circuit *1 DI-477
5. ATF temperature sensor circuit *1 DI-1166
7. ECM IN-30
1. O/D main switch circuit DI-1274
Up-shift to 5th from 4th while shift lever is in 4 position
2. ECM IN-30
1. Engine coolant temp. sensor circuit *1 DI-477
Up-shift to 5th from 4th while engine is cold
2. ECM IN-30
1. Park/neutral position switch circuit *1 DI-1159
Up-shift to 4th from 3rd while shift lever is in 3 position
2. ECM IN-30
1. Park/neutral position switch circuit *1 DI-1159
Up-shift to 3rd from 2nd while shift lever is in 2 position
2. ECM IN-30
1. Shift position L switch circuit DI-1277
Up-shift to 2nd from 1st while shift lever is in L position
2. ECM IN-30
1. Speed sensor NT circuit *1 DI-1175
2. Shift solenoid valve (SL1) circuit *1 DI-1188
Harsh engagement (N D)
3. Shift solenoid valve (SLT) circuit *1 DI-1247
4. ECM IN-30
1. Speed sensor NT circuit *1 DI-1175
2. Speed sensor SP2 circuit *1 DI-1180
Harsh engagement (Lock-up)
3. Shift solenoid valve (SLU) circuit *1 DI-1265
4. ECM IN-30
Harsh engagement (Any driving position) ECM IN-30
1. ATF temperature sensor No.2 circuit *1 DI-1251
2. Engine coolant temp. sensor circuit *1 DI-477
Poor acceleration
3. Shift solenoid valve (SLT) circuit *1 DI-1247
4. ECM IN-30
No engine braking ECM IN-30
No kick-down ECM IN-30
1. Shift solenoid valve (SLU) circuit *1 DI-1265
Engine stalls when starting off or stopping
2. ECM IN-30
AT Oil Temp. warning light remains on 1. ATF temperature sensor No.2 circuit *1 1 DI-1251
Lock-up at 3rd gear 2. Engine coolant temp. sensor circuit
tem . *1 DI 477
DI-477
Shift point too high 3. ECM IN-30
1. Park/neutral position switch circuit *1 DI-1159
Malfunction in shifting
2. ECM IN-30
DI-1138 DIAGNOSTICS - AUTOMATIC TRANSMISSION (A750E/A750F for
2UZ-FE)
Chapter 2: On-Vehicle Repair
(L: A750E, A750F AUTOMATIC TRANSMISSION Repair Manual Pub. No. RM999U)
Symptom Suspect Area See page
1. Transmission control cable DI-1117
Vehicle does not move with shift lever in any forward position and 2. Manual valve L
reverse position 3. Parking lock pawl L
4. Off-vehicle repair matrix chart -
1. Valve body assy AT-12
Vehicle does not move with shift lever in R position
2. Off-vehicle repair matrix chart -
1. Valve body assy AT-12
No up-shift (1st 2nd)
2. Off-vehicle repair matrix chart -
1. Valve body assy AT-12
No up-shift (2nd 3rd)
2. Off-vehicle repair matrix chart -
1. Valve body assy AT-12
No up-shift (3rd 4th)
2. Off-vehicle repair matrix chart -
1. Valve body assy AT-12
No up-shift (4th 5th)
2. Off-vehicle repair matrix chart -
1. Valve body assy AT-12
No down-shift (5th 4th)
2. Off-vehicle repair matrix chart -
1. Valve body assy AT-12
No down-shift (4th 3rd)
2. Off-vehicle repair matrix chart -
1. Valve body assy AT-12
No down-shift (3rd 2nd)
2. Off-vehicle repair matrix chart -
1. Valve body assy AT-12
No down-shift (2nd 1st)
2. Off-vehicle repair matrix chart -
1. Shift solenoid valve (SLU) DI-1257
No lock-up or No lock-up off 2. Valve body assy AT-12
3. Off-vehicle repair matrix chart -
1. Shift solenoid valve (SL1) DI-1205
2. Valve body assy AT-12
Harsh engagement (N D)
3. C1 accumulator L
4. Off-vehicle repair matrix chart -
1. Shift solenoid valve (SLU) DI-1257
Harsh engagement (Lock-up) 2. Valve body assy AT-12
3. Off-vehicle repair matrix chart -
1. Shift solenoid valve (SLT) DI-1241
2. Shift solenoid valve (SLU) DI-1257
Harsh engagement (N R) 3. Valve body assy AT-12
4. C3 accumulator L
5. Off-vehicle repair matrix chart -
1. Shift solenoid valve (SLT) DI-1241
Harsh engagement (1st 2nd 3rd 4th 5th) 2. Shift solenoid valve (SL1) DI-1205
3. Valve body assy AT-12
1. Valve body assy AT-12
Harsh engagement (1st 2nd) 2. B3 accumulator L
3. Off-vehicle repair matrix chart -
1. Valve body assy AT-12
Harsh engagement (2nd 3rd) 2. C3 accumulator L
3. Off-vehicle repair matrix chart -
1. Valve body assy AT-12
Harsh engagement (3rd 4th) 2. C2 accumulator L
3. Off-vehicle repair matrix chart -
DIAGNOSTICS - AUTOMATIC TRANSMISSION (A750E/A750F for DI-1139
2UZ-FE)
1. Shift solenoid valve (SL1) DI-1205
2. Shift solenoid valve (SL2) DI-1210
Harsh engagement (4th 5th)
3. Valve body assy AT-12
4. Off-vehicle repair matrix chart -
1. Shift solenoid valve (SL1) DI-1205
2. Shift solenoid valve (SL2) DI-1210
Harsh engagement (5th 4th)
3. Valve body assy AT-12
4. Off-vehicle repair matrix chart -
1. Transmission control cable DI-1117
2. Valve body assy AT-12
Slip or shudder (Forward and reverse)
3. Oil strainer AT-12
4. Off-vehicle repair matrix chart -
1. Valve body assy AT-12
No engine braking (1st: L position)
2. Off-vehicle repair matrix chart -
1. Valve body assy AT-12
No engine braking (2nd: 2 position)
2. Off-vehicle repair matrix chart -
No kick-down Valve body assy AT-12
1. Shift solenoid valve (SLT) DI-1241
Shift point too high or too low 2. Shift solenoid valve (SL1) DI-1205
3. Valve body assy AT-12
1. Shift solenoid valve (SLT) DI-1241
Poor acceleration
2. Valve body assy AT-12
1. Shift solenoid valve (SLU) DI-1257
Engine stalls when starting off or stopping
2. Valve body assy AT-12
DI-1140 DIAGNOSTICS - AUTOMATIC TRANSMISSION (A750E/A750F for
2UZ-FE)
Chapter 3: Off-Vehicle Repair
(L: A750E, A750F AUTOMATIC TRANSMISSION Repair Manual Pub. No. RM999U)
Symptom Suspect Area See page
Vehicle does not move with shift lever in any forward position and 1. Rear planetary gear unit L
reverse position 2. Torque converter clutch AT-39
1. Brake No. 4 (B4) L
Vehicle does not move with shift lever in R position 2. Clutch No. 3 (C3) L
3. One-way clutch No.4 (F1) L
1. Brake No. 3 (B3) L
No up-shift (1st 2nd) 2. One-way clutch No.1 (F1) L
3. One-way clutch No. 2 (F2) L
No up-shift (2nd 3rd) Clutch No. 3 (C3) L
No up-shift (3rd 4th) Clutch No. 2 (C2) L
1. Brake No. 1 (B1) L
No up-shift (4th 5th)
2. Clutch No. 1 (C1) L
No lock-up or No lock-up off Torque converter clutch AT-39
1. Clutch No. 1 (C1) L
Harsh engagement (N D)
2. One-way clutch No.3 (F3) L
1. Clutch No. 3 (C3) L
Harsh engagement (N R) 2. Brake No. 4 (B4) L
3. One-way clutch No.1 (F1) L
1. Brake No. 3 (B3) L
Harsh engagement (1 2) 2. One-way clutch No.1 (F1) L
3. One-way clutch No. 2 (F2) L
Harsh engagement (2 3) Clutch No. 3 (C3) L
Harsh engagement (3 4) Clutch No. 2 (C2) L
1. Brake No. 1 (B1) L
Harsh engagement (4 5th)
2. Clutch No. 1 (C1) L
Harsh engagement (Lock-up) Torque converter clutch AT-39
1. One-way clutch No.1 (F1) L
Slip or shudder (Forward and reverse: After warm-up) 2. Clutch No. 3 (C3) L
3. Torque converter clutch clutch L
Slip or shudder (Particular position: Just after engine starts) Torque converter clutch AT-39
1. Brake No. 4 (B4) L
Slip or shudder (R position) 2. One-way clutch No.1 (F1) L
3. Clutch No. 3 (C3) L
1. Clutch No. 1 (C1) L
Slip or shudder (1st)
2. One-way clutch No.3 (F3) L
1. Clutch No. 1 (C1) L
2. Brake No. 3 (B3) L
Slip or shudder (2nd)
3. One-way clutch No.1 (F1) L
4. One-way clutch No.2 (F2) L
1. Clutch No. 1 (C1) L
Slip or shudder (3rd) 2. Clutch No. 3 (C3) L
3. One-way clutch No.1 (F1) L
1. Clutch No. 1 (C1) L
Slip or shudder (4th)
2. Clutch No. 2 (C2) L
1. Clutch No. 2 (C2) L
Slip or shudder (5th) 2. Clutch No. 3 (C3) L
3. Brake No. 1 (B1) L
No engine braking (1st - 4th: D position) Clutch No. 1 (C1) L
DIAGNOSTICS - AUTOMATIC TRANSMISSION (A750E/A750F for DI-1141
2UZ-FE)
No engine braking (1st: L position) Brake No. 4 (B4) L
No engine braking (2nd: 2 position) Brake No. 2 (B2) L
No engine braking (3rd: 3 position) Brake No. 1 (B1) L
Poor acceleration (All positions) Torque converter clutch AT-39
1. Clutch No. 1 (C1) L
2. Clutch No. 3 (C3) L
Poor acceleration (5th)
3. Brake No. 1 (B1) L
4. Front planetary gear unit L
Engine stalls when starting off or stopping Torque converter clutch AT-39
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