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DI-175
DIAGNOSTICS - AUTOMATIC TRANSMISSION
DI0SR-12
PROBLEM SYMPTOMS TABLE
HINT:
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.
S 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.
S 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
Symptom Suspect Area See page
No up-shift
1. ECM IN-28
(A particular gear from 1st to 3rd gear is not up-shifted)
3. O/D main switch & O/D OFF indicator light circuit DI-218
No up-shift (3rd O/D)
4. ECM IN-28
No down-shift (O/D 3rd) 1. ECM IN-28
No down-shift
1. ECM IN-28
(A particular gear from 1st to 3rd gear is not down-shifted)
No lock-up 1. ECM IN-28
No lock-up off 1. ECM IN-28
1. Pattern select switch circuit DI-214
Shift point too high or too low
2. ECM IN-28
1. O/D main switch & O/D OFF indicator light circuit DI-218
Up-shift to O/D from 3rd while main switch is off
2. ECM IN-28
Up-shift to O/D from 3rd while engine is cold 1. ECM IN-28
Poor acceleration 1. ECM IN-28
1. Pattern select switch DI-214
No pattern select
2. ECM IN-28
Large shift shock or engine stalls when starting off or stopping 1. ECM IN-28
2002 4RUNNER (RM887U)
Author : Date : 351
DI-176
DIAGNOSTICS - AUTOMATIC TRANSMISSION
CHAPTER 2: ON-VEHICLE REPAIR
(L: A340E, A340F AUTOMATIC TRANSMISSION Repair Manual Pub. No. RM391U)
(L: A340F, A343F AUTOMATIC TRANSMISSION Repair Manual Pub. No. RM479U)
Symptom Suspect Area See page
1. Transmission control rod DI-159
Vehicle does not move in any forward position and reverse posi- 2. Manual valve L
tion 3. Parking lock pawl L
4. Off-vehicle repair matrix chart DI-175
Vehicle does not move in R position 1. Off-vehicle repair matrix chart DI-175
Vehicle does not move in particular position or positions
1. Off-vehicle repair matrix chart DI-175
(except R position)
1. 1-2 shift valve L
No up-shift (1st 2nd)
2. Off-vehicle repair matrix chart DI-175
1. 2-3 shift valve L
No up-shift (2nd 3rd)
2. Off-vehicle repair matrix chart DI-175
1. 3-4 shift valve L
No up-shift (3rd O/D)
2. Off-vehicle repair matrix chart DI-175
1. 3-4 shift valve L
No down-shift (O/D 3rd)
2. Off-vehicle repair matrix chart DI-175
1. 2-3 shift valve L
No down-shift (3rd 2nd)
2. Off-vehicle repair matrix chart DI-175
1. 1-2 shift valve L
No down-shift (2nd 1st)
2. Off-vehicle repair matrix chart DI-175
1. Lock-up control valve L
No lock-up or No lock-up off 2. Lock-up relay valve L
3. Off-vehicle repair matrix chart DI-175
1. Accumulator control valve L
2. Solenoid modulator valve L
Harsh engagement (N D) 3. C1 accumulator L
4. Orifice control valve L
5. Off-vehicle repair matrix chart DI-175
1. Lock-up control valve L
2. Lock-up relay valve L
Harsh engagement (Lock-up)
3. Solenoid relay valve L
4. Off-vehicle repair matrix chart DI-175
1. Accumulator control valve L
2. C2 accumulator L
Harsh engagement (N R)
3. Solenoid modulator valve L
4. Off-vehicle repair matrix chart DI-175
Harsh engagement (N L) 1. Low coast modulator valve L
1. Accumulator control valve L
Harsh engagement (1st 2nd 3rd O/D)
2. Solenoid modulator valve L
1. Accumulator control valve L
2. Solenoid modulator valve L
Harsh engagement (2nd 3rd)
3. C2 accumulator L
4. Off-vehicle repair matrix chart DI-175
1. Accumulator control valve L
2. Solenoid modulator valve L
Harsh engagement (3rd O/D)
3. B0 accumulator L
4. Off-vehicle repair matrix chart DI-175
2002 4RUNNER (RM887U)
Author : Date : 352
DI-177
DIAGNOSTICS - AUTOMATIC TRANSMISSION
Symptom Suspect Area See page
1. Accumulator control valve L
2. Solenoid modulator valve L
Harsh engagement (O/D 3rd)
3. C0 accumulator L
4. Off-vehicle repair matrix chart DI-175
1. Transmission control rod DI-159
2. Oil strainer L
Slip or shudder (Forward and reverse)
3. Pressure relief valve L
4. Off-vehicle repair matrix chart DI-175
1. Transmission control rod DI-159
Slip or shudder (Particular position)
2. Off-vehicle repair matrix chart DI-175
1. Low coast modulator valve L
No engine braking (1st: L position)
2. Off-vehicle repair matrix chart DI-175
1. 2nd coast modulator valve L
No engine braking (2nd: 2 position)
2. Off-vehicle repair matrix chart DI-175
1. 1-2 shift valve L
No kick-down
2. 2-3 shift valve L
2002 4RUNNER (RM887U)
Author : Date : 353
DI-178
DIAGNOSTICS - AUTOMATIC TRANSMISSION
CHAPTER 3: OFF-VEHICLE REPAIR
(L: A340E, A340F AUTOMATIC TRANSMISSION Repair Manual Pub. No. RM391U)
(L: A340F, A343F AUTOMATIC TRANSMISSION Repair Manual Pub. No. RM479U)
Symptom Suspect Area See page
1. O/D one-way clutch (F0) L
Vehicle does not move in any forward position and reverse posi- 2. O/D direct clutch (C0) L
tion 3. O/D planetary gear unit L
4. Torque converter clutch L
1. Front and rear planetary gear unit L
2. Direct clutch (C2) L
Vehicle does not move in R position
3. 1st and reverse brake (B3) L
4. O/D direct clutch (C0) L
1. 2nd brake (B2) L
No up-shift (1st 2nd)
2. No. 1 one-way clutch (F1) L
No up-shift (2nd 3rd) 1. Direct clutch (C2) L
No up-shift (3rd O/D) 1. O/D brake (B0) L
No lock-up or No lock-up off 1. Torque converter clutch L
1. Forward clutch (C1) L
Harsh engagement (N D) 2. O/D one-way clutch (F0) L
3. No. 2 one-way clutch (F2) L
1. Direct clutch (C2) L
Harsh engagement (N R) 2. 1st and reverse brake (B3) L
3. O/D one-way clutch (F0) L
1. Forward clutch (C1) L
Harsh engagement (N 2) 2. O/D one-way clutch (F0) L
3. No. 2 one-way clutch (F2) L
1. Forward clutch (C1) L
2. 1st and reverse brake (B3) L
Harsh engagement (N L)
3. O/D one-way clutch (F0) L
4. No. 2 one-way clutch (F2) L
Harsh engagement (Lock-up) 1. Torque converter clutch L
1. Torque converter clutch L
Slip or shudder (Forward and reverse: After warm-up) 2. O/D one-way clutch (F0) L
3. O/D direct clutch (C0) L
Slip or shudder (Particular position: Just after engine starts) 1. Torque converter clutch L
1. Direct clutch (C2) L
Slip or shudder (R position)
2. 1st and reverse brake (B3) L
1. Forward clutch (C1) L
Slip or shudder (1st)
2. No. 2 one-way clutch (F2) L
1. 2nd brake (B2) L
Slip or shudder (2nd) 2. 2nd coast brake (B1) L
3. No. 1 one-way clutch (F1) L
Slip or shudder (3rd) 1. Direct clutch (C2) L
Slip or shudder (O/D) 1. O/D brake (B0) L
No engine braking (1st - 3rd: D position) 1. 2nd brake (B2) L
No engine braking (1st: L position) 1. 1st and reverse brake (B3) L
No engine braking (2nd: 2 position) 1. 2nd coast brake (B1) L
Poor acceleration (All position) 1. Torque converter clutch L
1. O/D direct clutch (C0) L
Poor acceleration (O/D)
2. O/D planetary gear unit L
Engine stalls when starting off or stopping 1. Torque converter clutch L
2002 4RUNNER (RM887U)
Author : Date : 354
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