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Home >> Lexus >> 2006 >> IS 250 AWD >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission (A760H) >> Automatic Transmission System >> Problem Symptoms Table

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 tables on the following references and proceed to the reference given for troubleshooting.

The Matrix Table is divided into 2 chapters.

Chapter 1:

Refer to CHAPTER 1: ELECTRONIC CIRCUIT MATRIX TABLE  when the trouble cause is considered to be electrical.

If the instruction "Proceed to next circuit inspection shown on matrix table" is given in the flow table 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 Table 
    CHAPTER 1: ELECTRONIC CIRCUIT MATRIX TABLE

    Symptom Suspected area Reference
    no up-shift (1st -> 2nd) Shift solenoid valve (S1) circuit (1) DTC P0973, P0974: SHIFT SOLENOID "A" CONTROL CIRCUIT LOW (SHIFT SOLENOID VALVE S1); SHIFT SOLENOID SHIFT SOLENOID "A" Control Circuit High (Shift Solenoid Valve S1) 
    ECM ELECTRONIC CIRCUIT INSPECTION PROCEDURE
    No up-shift (2nd -> 3rd) Shift solenoid valve (S2) circuit (1) DTC P0976, P0977: SHIFT SOLENOID "B" CONTROL CIRCUIT LOW (SHIFT SOLENOID VALVE S2); SHIFT SOLENOID SHIFT SOLENOID "B" Control Circuit High (Shift Solenoid Valve S2) 
    ECM ELECTRONIC CIRCUIT INSPECTION PROCEDURE
    No up-shift (3rd -> 4th) Shift solenoid valve (S3) circuit (1) DTC P0979, P0980: SHIFT SOLENOID "C" CONTROL CIRCUIT LOW (SHIFT SOLENOID VALVE S3); SHIFT SOLENOID SHIFT SOLENOID "C" Control Circuit High (Shift Solenoid Valve S3) 
    Engine coolant temp. sensor circuit (1) DIAGNOSTIC TROUBLE CODE TABLE
    ECM ELECTRONIC CIRCUIT INSPECTION PROCEDURE
    No up-shift (4th -> 5th) Shift solenoid valve (S4) circuit (1) DTC P0982, P0983: SHIFT SOLENOID "D" CONTROL CIRCUIT LOW (SHIFT SOLENOID VALVE S4); SHIFT SOLENOID SHIFT SOLENOID "D" Control Circuit High (Shift Solenoid Valve S4) 
    Shift solenoid valve (SR) circuit (1) DTC P0985, P0986: SHIFT SOLENOID "E" CONTROL CIRCUIT LOW (SHIFT SOLENOID VALVE SR); SHIFT SOLENOID SHIFT SOLENOID "E" Control Circuit High (Shift Solenoid Valve SR) 
    Shift solenoid valve (SL1) circuit (1) DTC P0751 SHIFT SOLENOID "A" Performance (Shift Solenoid Valve S1) 
    Shift solenoid valve (SL2) circuit (1) DTC P0778 PRESSURE CONTROL SOLENOID "B" Electrical (Shift Solenoid Valve SL2) 
    ECM ELECTRONIC CIRCUIT INSPECTION PROCEDURE
    No up-shift (5th -> 6th) Park/neutral position switch circuit (1) DTC P0705 Transmission Range Sensor Circuit Malfunction (PRNDL Input) 
    Engine coolant temp. sensor circuit (1) DIAGNOSTIC TROUBLE CODE TABLE
    Shift solenoid valve (S2) circuit (1) DTC P0976, P0977: SHIFT SOLENOID "B" CONTROL CIRCUIT LOW (SHIFT SOLENOID VALVE S2); SHIFT SOLENOID SHIFT SOLENOID "B" Control Circuit High (Shift Solenoid Valve S2) 
    ECM ELECTRONIC CIRCUIT INSPECTION PROCEDURE
    No down-shift (6th -> 5th) Park/neutral position switch circuit (1) DTC P0705 Transmission Range Sensor Circuit Malfunction (PRNDL Input) 
    Shift solenoid valve (S2) circuit (1) DTC P0976, P0977: SHIFT SOLENOID "B" CONTROL CIRCUIT LOW (SHIFT SOLENOID VALVE S2); SHIFT SOLENOID SHIFT SOLENOID "B" Control Circuit High (Shift Solenoid Valve S2) 
    ECM ELECTRONIC CIRCUIT INSPECTION PROCEDURE
    No down-shift (5th -> 4th) Shift solenoid valve (S4) circuit (1) DTC P0982, P0983: SHIFT SOLENOID "D" CONTROL CIRCUIT LOW (SHIFT SOLENOID VALVE S4); SHIFT SOLENOID SHIFT SOLENOID "D" Control Circuit High (Shift Solenoid Valve S4) 
    Shift solenoid valve (SR) circuit (1) DTC P0985, P0986: SHIFT SOLENOID "E" CONTROL CIRCUIT LOW (SHIFT SOLENOID VALVE SR); SHIFT SOLENOID SHIFT SOLENOID "E" Control Circuit High (Shift Solenoid Valve SR) 
    Shift solenoid valve (SL1) circuit (1) DTC P0751 SHIFT SOLENOID "A" Performance (Shift Solenoid Valve S1) 
    Shift solenoid valve (SL2) circuit (1) DTC P0778 PRESSURE CONTROL SOLENOID "B" Electrical (Shift Solenoid Valve SL2) 
    ECM ELECTRONIC CIRCUIT INSPECTION PROCEDURE
    No down-shift (4th -> 3rd) Shift solenoid valve (S3) circuit (1) DTC P0979, P0980: SHIFT SOLENOID "C" CONTROL CIRCUIT LOW (SHIFT SOLENOID VALVE S3); SHIFT SOLENOID SHIFT SOLENOID "C" Control Circuit High (Shift Solenoid Valve S3) 
    ECM ELECTRONIC CIRCUIT INSPECTION PROCEDURE
    No down-shift (3rd -> 2nd) Shift solenoid valve (S2) circuit (1) DTC P0976, P0977: SHIFT SOLENOID "B" CONTROL CIRCUIT LOW (SHIFT SOLENOID VALVE S2); SHIFT SOLENOID SHIFT SOLENOID "B" Control Circuit High (Shift Solenoid Valve S2) 
    ECM ELECTRONIC CIRCUIT INSPECTION PROCEDURE
    No down-shift (2nd -> 1st) Shift solenoid valve (S1) circuit (1) DTC P0973, P0974: SHIFT SOLENOID "A" CONTROL CIRCUIT LOW (SHIFT SOLENOID VALVE S1); SHIFT SOLENOID SHIFT SOLENOID "A" Control Circuit High (Shift Solenoid Valve S1) 
    ECM ELECTRONIC CIRCUIT INSPECTION PROCEDURE
    No lock-up or No lock-up off Shift solenoid valve (SLU) circuit (1) DTC P2759 Torque Converter Clutch Pressure Control Solenoid Control Circuit Electrical (Shift Solenoid Valve SLU) 
    Stop light switch circuit (1) DTC P0724 BRAKE SWITCH "B" Circuit High 
    ECM ELECTRONIC CIRCUIT INSPECTION PROCEDURE
    No lock-up Shift solenoid valve (SLU) circuit (1) DTC P2759 Torque Converter Clutch Pressure Control Solenoid Control Circuit Electrical (Shift Solenoid Valve SLU) 
    Engine coolant temp. sensor circuit (1) DIAGNOSTIC TROUBLE CODE TABLE
    Stop light switch circuit (1) DTC P0724 BRAKE SWITCH "B" Circuit High 
    Speed sensor NT circuit (1) DTC P0717 Turbine Speed Sensor Circuit No Signal 
    ECM ELECTRONIC CIRCUIT INSPECTION PROCEDURE
    No lock-up off Shift solenoid valve (SLU) circuit (1) DTC P2759 Torque Converter Clutch Pressure Control Solenoid Control Circuit Electrical (Shift Solenoid Valve SLU) 
    ECM ELECTRONIC CIRCUIT INSPECTION PROCEDURE
    Shift point too high or too low Shift solenoid valve (SLT) circuit (1) DTC P2716 PRESSURE CONTROL SOLENOID "D" Electrical (Shift Solenoid Valve SLT) 
    Speed sensor NT circuit (1) DTC P0717 Turbine Speed Sensor Circuit No Signal 
    Speed sensor SP2 circuit (1) DTC P0500 VEHICLE SPEED SENSOR "A" 
    Throttle position sensor circuit (1) DIAGNOSTIC TROUBLE CODE TABLE
    Pattern select (PWR) switch circuit Transmission Control Switch Circuit 
    ATF temperature sensor circuit (1) DTC P0710, P0712, P0713: TRANSMISSION FLUID TEMPERATURE SENSOR "A" CIRCUIT; TRANSMISSION FLUID TEMPERATURE SENSOR TRANSMISSION FLUID TEMPERATURE SENSOR "A" CIRCUIT LOW INPUT; TRANSMISSION FLUID TEMPERATURE SENSOR TRANSMISSION FLUID TEMPERATURE SENSOR "A" Circuit High Input 
    ECM ELECTRONIC CIRCUIT INSPECTION PROCEDURE
    Up-shift to 4th from 3rd while engine is cold Engine coolant temp. sensor circuit (1) DIAGNOSTIC TROUBLE CODE TABLE
    ECM ELECTRONIC CIRCUIT INSPECTION PROCEDURE
    Up-shift to 5th from 4th while engine is cold Engine coolant temp. sensor circuit (1) DIAGNOSTIC TROUBLE CODE TABLE
    ECM ELECTRONIC CIRCUIT INSPECTION PROCEDURE
    No gear change by shifting into "+" or "-" while the shifting lever Transmission control switch circuit TRANSMISSION CONTROL SWITCH CIRCUIT 
    Shift paddle switch circuit SHIFT PADDLE SWITCH CIRCUIT 
    ECM ELECTRONIC CIRCUIT INSPECTION PROCEDURE
    Harsh engagement (N -> D) Shift solenoid valve (SLT) circuit (1) DTC P2716 PRESSURE CONTROL SOLENOID "D" Electrical (Shift Solenoid Valve SLT) 
    Speed sensor NT circuit (1) DTC P0717 Turbine Speed Sensor Circuit No Signal 
    ECM ELECTRONIC CIRCUIT INSPECTION PROCEDURE
    Harsh engagement (Lock-up) Speed sensor NT circuit (1) DTC P0717 Turbine Speed Sensor Circuit No Signal 
    Speed sensor SP2 circuit (1) DTC P0500 VEHICLE SPEED SENSOR "A" 
    Shift solenoid valve (SLU) circuit (1) DTC P2759 Torque Converter Clutch Pressure Control Solenoid Control Circuit Electrical (Shift Solenoid Valve SLU) 
    ECM ELECTRONIC CIRCUIT INSPECTION PROCEDURE
    Harsh engagement (Any driving position) Throttle position sensor circuit (1) DIAGNOSTIC TROUBLE CODE TABLE
    Shift solenoid valve (SL1) circuit (1) DTC P0748 PRESSURE CONTROL SOLENOID "A" Electrical (Shift Solenoid Valve SL1) 
    Shift solenoid valve (SL2) circuit (1) DTC P0778 PRESSURE CONTROL SOLENOID "B" Electrical (Shift Solenoid Valve SL2) 
    Shift solenoid valve (SLU) circuit (1) DTC P2759 Torque Converter Clutch Pressure Control Solenoid Control Circuit Electrical (Shift Solenoid Valve SLU) 
    Shift solenoid valve (SLT) circuit (1) DTC P2716 PRESSURE CONTROL SOLENOID "D" Electrical (Shift Solenoid Valve SLT) 
    Speed sensor NT circuit (1) DTC P0717 Turbine Speed Sensor Circuit No Signal 
    ECM ELECTRONIC CIRCUIT INSPECTION PROCEDURE
    Poor acceleration Shift solenoid valve (SLT) circuit (1) DTC P2716 PRESSURE CONTROL SOLENOID "D" Electrical (Shift Solenoid Valve SLT) 
    Pattern select (SNOW) switch circuit Pattern Select Switch Snow Mode Circuit 
    ECM ELECTRONIC CIRCUIT INSPECTION PROCEDURE
    No engine brake ECM IN-46 No kick-down ECM ELECTRONIC CIRCUIT INSPECTION PROCEDURE
    Engine stalls when starting off or stopping Shift solenoid valve (SLU) circuit (1) DTC P2759 Torque Converter Clutch Pressure Control Solenoid Control Circuit Electrical (Shift Solenoid Valve SLU) 
    ECM ELECTRONIC CIRCUIT INSPECTION PROCEDURE
    ECT SNOW does not operate Shift solenoid valve (SLT) circuit (1) DTC P2716 PRESSURE CONTROL SOLENOID "D" Electrical (Shift Solenoid Valve SLT) 
    Pattern select (SNOW) switch circuit Pattern Select Switch Snow Mode Circuit 
    ECM ELECTRONIC CIRCUIT INSPECTION PROCEDURE
    Malfunction in shifting Park/neutral position switch circuit (1) DTC P0705 Transmission Range Sensor Circuit Malfunction (PRNDL Input) 
    Transmission control switch circuit TRANSMISSION CONTROL SWITCH CIRCUIT 
    ECM ELECTRONIC CIRCUIT INSPECTION PROCEDURE
    Harsh engagement (1st -> 2nd -> 3rd -> 4th -> 5th) Shift solenoid valve (SR) circuit (1) DTC P0985, P0986: SHIFT SOLENOID "E" CONTROL CIRCUIT LOW (SHIFT SOLENOID VALVE SR); SHIFT SOLENOID SHIFT SOLENOID "E" Control Circuit High (Shift Solenoid Valve SR) 
    Slip or shudder (5th -> 6th and 6th -> 5th) Shift solenoid valve (SR) circuit (1) DTC P0985, P0986: SHIFT SOLENOID "E" CONTROL CIRCUIT LOW (SHIFT SOLENOID VALVE SR); SHIFT SOLENOID SHIFT SOLENOID "E" Control Circuit High (Shift Solenoid Valve SR) 
    HINT:
    (1) When the circuit is detective, a DTC may be output.
  2. Chapter 2: On-Vehicle Repair and Off-Vehicle Repair 
    CHAPTER 2: ON-VEHICLE REPAIR AND OFF-VEHICLE REPAIR

    Symptom Suspected area Reference
    Vehicle does not move in any forward position and reverse positions Transmission control rod ADJUSTMENT 
    Manual valve COMPONENTS 
    Parking lock pawl COMPONENTS 
    Rear planetary gear unit COMPONENTS 
    Torque converter clutch INSPECTION 
    Vehicle does not move in R position Valve body assembly REMOVAL 
    Brake No. 4 (B4) COMPONENTS 
    No up-shift (1st -> 2nd) Valve body assembly REMOVAL 
    Brake No. 3 (B3) COMPONENTS 
    One-way clutch No. 1 (F1) COMPONENTS 
    One-way clutch No. 2 (F2) COMPONENTS 
    No up-shift (2nd -> 3rd) Valve body assembly REMOVAL 
    Clutch No. 3 (C3) COMPONENTS 
    No up-shift (3rd -> 4th) Valve body assembly REMOVAL 
    Clutch No. 2 (C2) COMPONENTS 
    No up-shift (4th -> 5th) Valve body assembly REMOVAL 
    Brake No. 1 (B1) COMPONENTS 
    No up-shift (5th -> 6th) Valve body assembly REMOVAL 
    Brake No. 2 (B2) COMPONENTS 
    No down-shift (6th -> 5th) Valve body assembly REMOVAL 
    No down-shift (5th -> 4th) Valve body assembly REMOVAL 
    No down-shift (4th -> 3rd) Valve body assembly REMOVAL 
    No down-shift (3rd -> 2nd) Valve body assembly REMOVAL 
    No down-shift (2nd -> 1st) Valve body assembly REMOVAL 
    No lock-up or No lock-up off Valve body assembly REMOVAL 
    Torque converter clutch INSPECTION 
    Harsh engagement (N -> D) Valve body assembly REMOVAL 
    C1 accumulator COMPONENTS 
    Clutch No. 1 (C1) COMPONENTS 
    One-way clutch No. 3 (F3) COMPONENTS 
    One-way clutch No. 4 (F4) COMPONENTS 
    Harsh engagement (Lock-up) Valve body assembly REMOVAL 
    Torque converter clutch INSPECTION 
    Harsh engagement (N -> R) Valve body assembly REMOVAL 
    C3 accumulator COMPONENTS 
    Clutch No. 3 (C3) COMPONENTS 
    Brake No. 4 (B4) COMPONENTS 
    One-way clutch No. 1 (F1) COMPONENTS 
    Harsh engagement (1st -> 2nd -> 3rd -> 4th -> 5th -> 6th) Valve body assembly REMOVAL 
    Harsh engagement (1st -> 2nd) Valve body assembly REMOVAL 
    B3 accumulator COMPONENTS 
    Brake No. 3 (B3) One-way clutch No. 1 (F1) COMPONENTS 
    One-way clutch No. 2 (F2) COMPONENTS 
    Harsh engagement (2nd -> 3rd) Valve body assembly REMOVAL 
    C3 accumulator COMPONENTS 
    Clutch No. 3 (C3) COMPONENTS 
    Harsh engagement (3rd -> 4th) Valve body assembly REMOVAL 
    C2 accumulator COMPONENTS 
    Clutch No. 2 (C2) COMPONENTS 
    Harsh engagement (4th -> 5th) Valve body assembly REMOVAL 
    B1 accumulator COMPONENTS 
    Brake No. 1 (B1) COMPONENTS 
    Harsh engagement (5th -> 6th) Valve body assembly REMOVAL 
    B2 accumulator COMPONENTS 
    Brake No. 2 (B2) COMPONENTS 
    Harsh engagement (6th -> 5th) Valve body assembly REMOVAL 
    C3 accumulator COMPONENTS 
    Clutch No. 3 (C3) COMPONENTS 
    Slip or shudder (Forward and reverse: After warm-up) Valve body assembly REMOVAL 
    Oil strainer REMOVAL 
    One-way clutch No. 1 (F1) COMPONENTS 
    Clutch No. 3 (C3) COMPONENTS 
    Torque converter clutch INSPECTION 
    Slip or shudder (Particular position: Just after engine starts) Torque converter clutch INSPECTION 
    Slip or shudder (R position) Brake No. 4 (B4) COMPONENTS 
    One-way clutch No. 1 (F1) COMPONENTS 
    Clutch No. 3 (C3) COMPONENTS 
    Slip or shudder (1st) Clutch No. 1 (C1) COMPONENTS 
    One-way clutch No. 3 (F3) COMPONENTS 
    One-way clutch No. 4 (F4) COMPONENTS 
    Slip or shudder (2nd) Clutch No. 1 (C1) COMPONENTS 
    Brake No. 3 (B3) COMPONENTS 
    One-way clutch No. 1 (F1) COMPONENTS 
    One-way clutch No. 2 (F2) COMPONENTS 
    One-way clutch No. 4 (F4) COMPONENTS 
    Slip or shudder (3rd) Clutch No. 1 (C1) COMPONENTS 
    Clutch No. 3 (C3) COMPONENTS 
    One-way clutch No. 1 (F1) COMPONENTS 
    One-way clutch No. 4 (F4) COMPONENTS 
    Slip or shudder (4th) Clutch No. 1 (C1) COMPONENTS 
    Clutch No. 2 (C2) COMPONENTS 
    One-way clutch No. 4 (F4) COMPONENTS 
    Slip or shudder (5th) Clutch No. 2 (C2) COMPONENTS 
    Clutch No. 3 (C3) COMPONENTS 
    Brake No. 1 (B1) COMPONENTS 
    Slip or shudder (6th) Clutch No. 2 (C2) COMPONENTS 
    Brake No. 2 (B2) COMPONENTS 
    No engine braking (1st +- 4th: S position) Clutch No. 4 (C4) COMPONENTS 
    No engine braking (1st: 1 position) Valve body assembly REMOVAL 
    Brake No. 4 (B4) COMPONENTS 
    No engine braking (2nd: 2 position) Valve body assembly REMOVAL 
    Brake No. 2 (B2) COMPONENTS 
    No engine braking (3rd: 3 position) Valve body assembly REMOVAL 
    Brake No. 1 (B1) COMPONENTS 
    No engine braking (4th: 4 position) Valve body assembly REMOVAL 
    No kick-down Valve body assembly REMOVAL 
    Shift point too high or too low Valve body assembly REMOVAL 
    Poor acceleration (All positions) Valve body assembly REMOVAL 
    Torque converter clutch INSPECTION 
    Poor acceleration (6th) Brake No. 2 (B2) COMPONENTS 
    Clutch No. 2 (C2) COMPONENTS 
    Front planetary gear unit COMPONENTS 
    Engine stalls when starting off or stopping Valve body assembly REMOVAL 
    Torque converter clutch INSPECTION