Problem Symptoms Table

HINT:

If a normal code is displayed during the diagnostic trouble code check although 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.

• 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.
• If the trouble still occurs even though there are no abnormalities in any of the other circuits, check and replace the ECM.

1. Chapter 1: Electronic Circuit Matrix Chart 
   PROBLEM SYMPTOMS (1 OF 3)
   
   

   Symptom	Suspect Area
   No down-shift (A particular gear, from 1st to 4th gear, is not down-shifted)	Shift solenoid valve (SL1, SL2, SL3, SR) ECM
   No down-shift (5th --> 4th)	Transmission control switch circuit Shift solenoid valve (S4) ECM
   No up-shift (A particular gear, from 1st to 4th gear, is not up-shifted)	Shift solenoid valve (SL1, SL2) ECM
   No up-shift (4th --> 5th)	Transmission control switch circuit Shift solenoid valve (S4) ECM
   No lock-up	Shift solenoid valve (DSL) ECM
   No lock-up off	Shift solenoid valve (DSL) ECM
   Shift point too high or too low	Throttle position sensor circuit Shift solenoid valve (SLT) ECM
   Up-shift to 5th from 4th while shift lever is 4 position	Transmission control switch circuit ECM
   Up-shift to 5th from 4th while engine is cold	Engine coolant temp, sensor circuit ECM
   Up-shift to 4th from 3rd while shift lever is 3 position	Park/neutral position switch circuit ECM
   Up-shift to 3rd from 2nd while shift lever is 2 position	Park/neutral position switch circuit ECM
   Up-shift to 2nd from 1st while shift lever is L position	Transmission control switch circuit ECM
   Harsh engagement (N --> D)	Shift solenoid valve (SL1) ECM
   Harsh engagement (Lock-up)	Shift solenoid valve (SL2) ECM
   Harsh engagement (Any driving position)	Shift solenoid valve (SLT) ECM
   Poor acceleration	Shift solenoid valve (SLT) ECM
   No kick-down	ECM
   Engine stalls when starting off or stopping	Shift solenoid valve (DSL) ECM

2. Chapter 2: On-Vehicle Repair 

   (*: U150E AUTOMATIC TRANSAXLE Repair Manual Pub. No. RM913U) 

   PROBLEM SYMPTOMS (2 OF 3)
   
   

   Symptom	Suspect Area
   Vehicle does not move in any forward position and reverse positions	Valve body assy Off-vehicle repair matrix chart
   Vehicle does not move in R position	Valve body assy Off-vehicle repair matrix chart
   No up-shift (1st --> 2nd)	Valve body assy Off-vehicle repair matrix chart
   No up-shift (2nd --> 3rd)	Valve body assy Off-vehicle repair matrix chart
   No up-shift (3rd --> 4th)	Valve body assy Off-vehicle repair matrix chart
   No up-shift (4th --> 5th)	Valve body assy Off-vehicle repair matrix chart
   No down-shift (5th --> 4th)	Valve body assy Off-vehicle repair matrix chart
   No down-shift (4th --> 3rd)	Valve body assy Off-vehicle repair matrix chart
   No down-shift (3rd --> 2nd)	Valve body assy Off-vehicle repair matrix chart
   No down-shift (2nd --> 1st)	Valve body assy Off-vehicle repair matrix chart
   No lock-up or No lock-up off	Valve body assy Off-vehicle repair matrix chart
   Harsh engagement (N --> D)	Valve body assy C1 accumulator Off-vehicle repair matrix chart
   Harsh engagement (Lock-up)	Valve body assy Off-vehicle repair matrix chart
   Harsh engagement (N --> R)	Valve body assy C2 accumulator Off-vehicle repair matrix chart
   Harsh engagement (1st -->2nd --> 3rd --> 4th --> 5th)	Valve body assy
   Harsh engagement (1st --> 2nd)	Valve body assy Off-vehicle repair matrix chart
   Harsh engagement (2nd --> 3rd)	Valve body assy Co accumulator Off-vehicle repair matrix chart
   Harsh engagement (3rd --> 4th)	Valve body assy Off-vehicle repair matrix chart
   Harsh engagement (4th --> 5th)	Valve body assy C3 accumulator Off-vehicle repair matrix chart
   Harsh engagement (5th --> 4th)	Valve body assy B3 accumulator Off-vehicle repair matrix chart
   Slip or shudder (Forward and reverse)	Valve body assy Oil strainer Off-vehicle repair matrix chart
   No engine braking (1st: L position)	Valve body assy Off-vehicle repair matrix chart
   No engine braking (2nd: 2 position)	Valve body assy Off-vehicle repair matrix chart
   No kick-down	Valve body assy

1. 3. Chapter 3: Off-Vehicle Repair 
   PROBLEM SYMPTOMS (3 OF 3)
   
   

   Symptom	Suspect Area
   Vehicle does not move in any forward position and reverse positions	U/D brake (B3) Torque converter clutch
   Vehicle does not move in R position	Reverse clutch (C2 ) 1st & reverse brake (B2 )
   No up-shift (1st --> 2nd)	2nd & O/D brake (B1
   No up-shift (2nd --> 3rd)	Direct and O/D clutch (C0 )
   No up-shift (3rd --> 4th)	2nd & O/D brake (B-1 )
   No up-shift (4th --> 5th)	U/D clutch (C3 )
   No lock-up or No lock-up off	Torque converter clutch
   Harsh engagement (N --> D)	Forward clutch (C1 ) One-way clutch No.1 (F1 ) U/D one-way clutch (F2)
   Harsh engagement (N --> R)	Reverse clutch (C2 ) 1st & reverse brake (B2 )
   Harsh engagement (1 --> 2)	2nd & O/D brake (B1 )
   Harsh engagement (2 --> 3)	Direct and O/D clutch (C2 )
   Harsh engagement (3 --> 4)	2nd & O/D brake (B1 )
   Harsh engagement (4 --> 5th)	U/D clutch (C3 )
   Harsh engagement (Lock-up)	Torque converter clutch
   Slip or shudder (Forward and reverse: After warm-up)	Direct and O/D clutch (C0 ) Forward clutch (C1) U/D clutch (C3) 2nd & O/D brake (B3 ) U/D brake (B3 ) One-way clutch No.1 (F1 ) U/D one-way clutch (F2 ) Torque converter clutch
   Slip or shudder (Particular position: Just after engine starts)	Torque converter clutch
   Slip or shudder (R position)	Reverse clutch (C2 ) 1st & reverse brake (B2 )
   Slip or shudder (1st)	Forward clutch (C1 ) One-way clutch No.1 (F2 ) U/D one-way clutch (F2 )
   Slip or shudder (2nd)	2nd & O/D brake (B1)
   Slip or shudder (3rd)	Direct and O/D clutch (C0 )
   Slip or shudder (4th)	2nd & O/D brake (B1 )
   Slip or shudder (5th)	U/D clutch (C3)
   No engine braking (1st - 4th: D position)	U/D brake (B3)
   No engine braking (1st: L position)	1st & reverse brake (B2 )
   No engine braking (2nd: 2 position)	2nd & O/D brake (B1
   No engine braking (3rd: 3 position)	U/D brake (B3)
   Poor acceleration (All positions)	Torque converter clutch
   Poor acceleration (5th)	U/D clutch (C3) U/D planetary gear unit
   Engine stalls when starting off or stopping	Torque converter clutch
   (1) See OVERHAUL - U150E article.