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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 category.

CATEGORY 1: ELECTRONIC CIRCUIT MATRIX CHART 

PROBLEM SYMPTOMS (1 OF 3)

Symptom Suspect Area Action
No up-shift (1st --> 2nd) ECM HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
No up-shift (2nd --> 3rd) ECM HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
No up-shift (3rd --> O/D)
  1. O/D main switch circuit
  2. O/D cancel signal circuit
  3. ECM
  1. O/D MAIN SWITCH & O/D OFF INDICTOR LIGHT CIRCUIT 
  2. O/D CANCEL SIGNAL CIRCUIT 
  3. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
No down-shift (O/D --> 3rd) ECM HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
No down-shift (3rd --> 2nd) ECM HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
No down-shift (2nd --> 1st) ECM HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
No lock-up or No lock-up off ECM HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
Shift point too high or too low ECM HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
Up-shift to 2nd while in L position ECM HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
Up-shift to 3rd while in L position ECM HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
Up-shift to O/D from 3rd
  1. O/D main switch circuit
  2. ECM
  1. O/D MAIN SWITCH & O/D OFF INDICTOR LIGHT CIRCUIT 
  2. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
Up-shift to O/D from 3rd while engine is cold ECM HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
Harsh engagement (N --> D) ECM HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
Harsh engagement (Lock-up) ECM HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
Harsh engagement (Any driving position) ECM HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
Poor acceleration ECM HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
Large shift shock or engine stalls when starting off or stopping ECM HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE

CATEGORY 2: ON-VEHICLE REPAIR 

PROBLEM SYMPTOMS (2 OF 3)

Symptom Suspect Area Action
Vehicle does not move in any forward position and reverse position
  1. Manual valve
  2. Throttle valve
  3. Primary regulator valve
  4. Off-vehicle repair matrix chart
  1. (1)
  2. (1)
  3. (1)
  4. (2) Off-vehicle repair
Vehicle does not move in R position Off-vehicle repair matrix chart -
No up-shift (1st --> 2nd)
  1. 1-2 shift valve
  2. Off-vehicle repair matrix chart
  1. (1)
  2. (2) Off-vehicle repair
No up-shift (2nd --> 3rd)
  1. 2-3 shift valve
  2. Off-vehicle repair matrix chart
  1. (1)
  2. (2) Off-vehicle repair
No up-shift (3rd --> O/D)
  1. 3-4 shift valve
  2. Off-vehicle repair matrix chart
  1. (1)
  2. (2) Off-vehicle repair
No down-shift (O/D --> 3rd) 3-4 shift valve (1)
No down-shift (3rd --> 2nd) 2-3 shift valve (1)
No down-shift (2nd --> 1st) 1-2 shift valve (1)
No lock-up or No lock-up off
  1. Lock-up relay valve
  2. Off-vehicle repair matrix chart
  1. (1)
  2. (2) Off-vehicle repair
Harsh engagement (N --> D)
  1. C1 accumulator
  2. Off-vehicle repair matrix chart
  1. (1)
  2. (2) Off-vehicle repair
Harsh engagement (N --> R)
  1. C2 accumulator
  2. No.1 accumulator control valve
  3. Off-vehicle repair matrix chart
  1. (1)
  2. (1)
  3. (2) Off-vehicle repair
Harsh engagement (N --> L) Low coast modulator valve (1)
Harsh engagement (Lock-up)
  1. Lock-up relay valve
  2. Off-vehicle repair matrix chart
  1. (1)
  2. (2) Off-vehicle repair
Harsh engagement (1st --> 2nd --> 3rd --> O/D)
  1. Throttle modulator valve
  2. Cut back valve
  3. Throttle valve
  1. (1)
  2. (1)
  3. (1)
Harsh engagement (2nd --> 3rd) C2 accumulator (1)
Harsh engagement (3rd --> O/D) B0 accumulator (1)
Harsh engagement (O/D --> 3rd)
  1. C0 accumulator
  2. Bo accumulator
  1. (1)
  2. (1)
Slip or shudder (Forward and reverse)
  1. Throttle valve
  2. Oil strainer
  3. Off-vehicle repair matrix chart
  1. (1)
  2. (1)
  3. (2) Off-vehicle repair
No engine braking (1st: L position)
  1. Low coast modulator valve
  2. Off-vehicle repair matrix chart
  1. (1)
  2. (2) Off-vehicle repair
No engine braking (2nd: 2 position)
  1. 2nd coast modulator valve
  2. Off-vehicle repair matrix chart
  1. (1)
  2. (2) Off-vehicle repair
No kick-down
  1. 1-2 shift valve
  2. 2-3 shift valve
  3. 3-4 shift valve
  1. (1)
  2. (1)
  3. (1)
(1) : U140E & U140F AUTOMATIC TRANSAXLE, Refer to OVERHAUL - U140E & U140F .

(2) Refer to PROBLEM SYMPTOMS (3 OF 3) .

CATEGORY 3: OFF-VEHICLE REPAIR 

PROBLEM SYMPTOMS (3 OF 3)

Symptom Suspect Area Action
Vehicle does not move in any forward position and reverse position
  1. Front and rear planetary gear
  2. U/D planetary gear
  3. U/D one-way clutch (F2 )
  4. Forward clutch (C-1 )
  5. U/D brake (B3)
  1. (1)
  2. (1)
  3. (1)
  4. (1)
  5. (1)
Vehicle does not move in R position
  1. Front and rear planetary gear unit
  2. U/D planetary gear unit
  3. Direct clutch (C2 )
  4. U/D brake (C3 )
  5. 1st and reverse brake (B2 )
  1. (1)
  2. (1)
  3. (1)
  4. (1)
  5. (1)
No up-shift (1st --> 2nd)
  1. No. 1 one-way clutch (F1 )
  2. 2nd brake (B1 )
  1. (1)
  2. (1)
No up-shift (2nd --> 3rd) Direct clutch (C2 ) (1)
No up-shift (3rd --> O/D) U/D clutch (C3 ) (1)
No lock-up or No lock-up off Torque converter clutch (1)
Harsh engagement (N --> D)
  1. Forward clutch (C1 )
  2. U/D one-way clutch (F2 )
  3. No. 1 one-way clutch (F1 )
  1. (1)
  2. (1)
  3. (1)
Harsh engagement (N --> R)
  1. Direct clutch (C2 )
  2. 1st and reverse brake (B2 )
  1. (1)
  2. (1)
Harsh engagement (Lock-up) Torque converter clutch (1)
Slip or shudder (Forward position: After warm-up)
  1. Torque converter clutch
  2. Forward clutch (C1 )
  3. Direct clutch (C2 )
  4. U/D brake (C3 )
  5. No. 1 one-way clutch (F1 )
  6. U/D one-way clutch (F2 )
  1. (1)
  2. (1)
  3. (1)
  4. (1)
  5. (1)
  6. (1)
Slip or shudder (R position)
  1. Direct clutch (C2 )
  2. 1st and reverse brake (B2 )
  1. (1)
  2. (1)
Slip or shudder (1st) No. 1 one-way clutch (F1 ) (1)
Slip or shudder (2nd)
  1. U/D one-way clutch (F2 )
  2. 2nd brake (B-0
 (1)
(1)
Slip or shudder (3rd) Direct clutch (C2 ) (1)
Slip or shudder (O/D) U/D clutch (C3 ) (1)
No engine braking (1st ~ 3rd: D position) U/D brake (B3) (1)
No engine braking (1st: L position) 1st and reverse brake (B2 ) (1)
No engine braking (2nd: 2 position) 2nd brake (B1 ) (1)
Poor acceleration (All position)
  1. Torque converter clutch
  2. U/D planetary gear
  1. (1)
  2. (1)
Poor acceleration (O/D)
  1. U/D clutch (C3 )
  2. U/D planetary gear
  1. (1)
  2. (1)
Large shift shock or engine stalls when starting off or stopping Torque converter clutch (1)
(1) : U140E & U140F AUTOMATIC TRANSAXLE, Refer to OVERHAUL - U140E & U140F .
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