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Problem Symptoms Table

WARNING: This page is about a different car, the 2005 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.

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 in the following examples and proceed to the step given for troubleshooting.

The Matrix Chart is divided into 3 chapters.

  1. Chapter 1: Electronic Circuit Matrix Chart 
    • Refer to the table below when the trouble cause is considered to be electrical.
    • 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.

    HINT:

    1. *1: When the circuit on which mark *1 is attached is defective, DTC could be output (see DIAGNOSTIC TROUBLE CODE CHART  ).
    2. *2: 4WD
      PROBLEM SYMPTOMS TABLE - AUTOMATIC TRANSMISSION (ELECTRONIC CIRCUITS)

      Symptom Suspected Area
      No up-shift
      (A particular gear, from 1st to 4th gear, is not up-shifted)
      1. Shift solenoid valve (S1) circuit (1)
      2. Shift solenoid valve (S2) circuit (1)
      3. ECM
      No up-shift (4th → 5th)
      1. Transmission control switch circuit (D - 4) (1)
      2. Engine coolant temp, sensor circuit (1)
      3. Speed sensor NT circuit (1)
      4. Shift solenoid valve (SL1) circuit (1)
      5. Shift solenoid valve (SL2) circuit (1)
      6. Shift solenoid valve (SR) circuit (1)
      7. ECM
      No up-shift (3rd → 4th)
      1. Engine coolant temp, sensor circuit (1)
      2. Shift solenoid valve (S2) circuit (1)
      3. ECM
      No up-shift (1st → 2nd)
      1. Transmission control switch circuit (2 - L) (1)
      2. Shift solenoid valve (S2) circuit (1)
      3. ECM
      No down-shift (5th → 4th)
      1. Transmission control switch circuit (D - 4) (1)
      2. Shift solenoid valve (SL1) circuit (1)
      3. Shift solenoid valve (SL2) circuit (1)
      4. Shift solenoid valve (SR) circuit (1)
      5. ECM
      No down-shift (2nd → 1st)
      1. Transmission control switch circuit (2 - L) (1)
      2. Shift solenoid valve (S2) circuit (1)
      3. ECM
      No down-shift
      (A particular gear, from 1st to 4th gear, is not down-shifted)
      1. Shift solenoid valve (S1) circuit (1)
      2. Shift solenoid valve (S2) circuit (1)
      3. ECM
      No lock-up
      1. ATF temperature sensor circuit (1)
      2. Transfer L4 position switch circuit (1), (2)
      3. Stop light switch circuit (1)
      4. Speed sensor NT circuit (1)
      5. Shift solenoid valve (SLU) circuit (1)
      6. Engine coolant temp, sensor circuit (1)
      7. ECM
      No lock-up off
      1. Shift solenoid valve (SLU) circuit (1)
      2. ECM
      Shift point too high or too low
      1. Shift solenoid valve (SLT) circuit (1)
      2. Speed sensor NT circuit (1)
      3. Speed sensor SP2 circuit (1)
      4. Throttle position sensor circuit (1)
      5. ATF temperature sensor circuit (1)
      6. Transfer L4 position switch circuit (1)
      7. ECM
      Up-shift to 5th from 4th while shift lever is in 4 position
      1. Transmission control switch circuit (D - 4) (1)
      2. ECM
      Up-shift to 5th from 4th while engine is cold
      1. Engine coolant temp, sensor circuit (1)
      2. ECM
      Up-shift to 4th from 3rd while shift lever is in 3 position
      1. Park/neutral position switch circuit (1)
      2. ECM
      Up-shift to 3rd from 2nd while shift lever is in 2 position
      1. Park/neutral position switch circuit (1)
      2. ECM
      Up-shift to 2nd from 1st while shift lever is in L position
      1. Transmission control switch circuit (2 - L) (1)
      2. ECM
      Harsh engagement (N → D)
      1. Speed sensor NT circuit (1)
      2. Shift solenoid valve (SL1) circuit (1)
      3. Shift solenoid valve (SLT) circuit (1)
      4. ECM
      Harsh engagement (Lock-up)
      1. Speed sensor NT circuit (1)
      2. Speed sensor SP2 circuit (1)
      3. Shift solenoid valve (SLU) circuit (1)
      4. ECM
      Harsh engagement (Any driving position) ECM
      Poor acceleration
      1. ATF temperature sensor No.2 circuit (1)
      2. Engine coolant temp, sensor circuit (1)
      3. Shift solenoid valve (SLT) circuit (1)
      4. ECM
      No engine braking ECM
      No kick-down ECM
      Engine stalls when starting off or stopping
      1. Shift solenoid valve (SLU) circuit (1)
      2. ECM
      AT Oil Temp, warning light remains on
      1. ATF temperature sensor No.2 circuit (1)
      2. Engine coolant temp, sensor circuit (1)
      3. ECM
      Lock-up at 3rd gear
      Shift point too high
      Malfunction in shifting
      1. Park/neutral position switch circuit (1)
      2. ECM
      (1) (U151E, AUTOMATIC TRANSAXLE Repair Manual Pub. No. RM1021U)
      (2) U151F AUTOMATIC TRANSAXLE Repair Manual Pub. No. RM1021U)
  2. Chapter 2: On-Vehicle Repair 

    (* : See  OVERHAUL - A750E & A750F  article) 

    Fig 1: Identifying A750E, A750F Automatic Transmission Problem Symptom Chart (1 Of 2)
    G02584842Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 2: Identifying A750E, A750F Automatic Transmission Problem Symptom Chart (2 Of 2)
    G02584843Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. Chapter 3: Off-Vehicle Repair 

    (* : See  OVERHAUL - A750E & A750F  article) 

    Fig 3: Identifying A750E, A750F Automatic Transmission Symptom Chart (1 Of 2)
    G02584844Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 4: Identifying A750E, A750F Automatic Transmission Symptom Chart (2 Of 2)
    G02584845Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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