Toyota 4Runner manuals

Toyota 4Runner: Problem Symptoms Table

PROBLEM SYMPTOMS TABLE

HINT:

  • Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
  • Inspect the fuses and relays related to this system before inspecting the suspected areas below.
  • The Matrix Chart is divided into 3 chapters.

    Chapter 1:

    Refer to the table below when the cause of the trouble is considered to be electrical.

  • If the instruction "Proceed To Next Suspected Area Shown In Problem Symptoms Table" is given in the flowchart of a circuit, proceed to the next suspected area 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 the ECM and replace it if necessary.
  • *: When the circuit is defective, a DTC may be output.
1. Chapter 1: Electronic Circuit Matrix Chart

Symptom

Suspected Area

See page

Up-shifts between 1st and 4th gear do not occur

Shift solenoid valve S1 circuit*


Shift solenoid valve S2 circuit*


ECM


No up-shift (4th -> 5th)

Speed sensor NT circuit*


Shift solenoid valve SL1 circuit*


Shift solenoid valve SL2 circuit*


Shift solenoid valve SR circuit*


ECM


No up-shift (3rd -> 4th)

Shift solenoid valve S2 circuit*


ECM


No up-shift (1st -> 2nd)

Shift solenoid valve S2 circuit*


ECM


No down-shift (5th -> 4th)

Shift solenoid valve SL1 circuit*


Shift solenoid valve SL2 circuit*


Shift solenoid valve SR circuit*


ECM


No down-shift (2nd -> 1st)

Shift solenoid valve S2 circuit*


ECM


Down-shifts between 4th and 1st gear do not occur

Shift solenoid valve S1 circuit*


Shift solenoid valve S2 circuit*


ECM


No lock-up

No. 1 ATF temperature sensor circuit*


Stop light switch circuit*


Speed sensor NT circuit*


Shift solenoid valve SLU circuit*


Engine coolant temperature sensor circuit*


ECM


No lock-up off

Shift solenoid valve SLU circuit*


ECM


Shift point too high or too low

Shift solenoid valve SLT circuit*


Speed sensor NT circuit*


Speed sensor SP2 circuit*


Throttle position sensor circuit*


No. 1 ATF temperature sensor circuit*


ECM


Up-shift to 5th from 4th while engine is cold

Engine coolant temperature sensor circuit*


ECM


Harsh engagement (N -> D)

Speed sensor NT circuit*


Shift solenoid valve SL1 circuit*


Shift solenoid valve SLT circuit*


ECM


Harsh engagement (Lock-up)

Speed sensor NT circuit*


Speed sensor SP2 circuit*


Shift solenoid valve SLU circuit*


ECM


Harsh engagement (Any gear position)

ECM


Poor acceleration

No. 2 ATF temperature sensor circuit*


Engine coolant temperature sensor circuit*


Shift solenoid valve SLT circuit*


ECM


No engine braking

ECM


No kick-down

ECM


Engine stalls when starting off or stopping

Shift solenoid valve SLU circuit*


ECM


ATF temperature warning light remains on, lock-up in 3rd gear and/or shift point too high

No. 2 ATF temperature sensor circuit*


Engine coolant temperature sensor circuit*


ECM


No gear change by moving shift lever to "+" or "-" while shift lever in S

Transmission control switch circuit


ECM


Shifting malfunction

Park/neutral position switch circuit*


Transmission control switch circuit


ECM


2. Chapter 2: On-vehicle Repair

Symptom

Suspected Area

See page

Vehicle does not move with shift lever in any forward position or reverse position

Transmission control cable


Manual valve


Parking lock pawl


Off-vehicle repair matrix chart

-

Vehicle does not move with shift lever in R

Valve body assembly


Off-vehicle repair matrix chart

-

No up-shift (1st -> 2nd)

Valve body assembly


Off-vehicle repair matrix chart

-

No up-shift (2nd -> 3rd)

Valve body assembly


Off-vehicle repair matrix chart

-

No up-shift (3rd -> 4th)

Valve body assembly


Off-vehicle repair matrix chart

-

No up-shift (4th -> 5th)

Valve body assembly


Off-vehicle repair matrix chart

-

No down-shift (5th -> 4th)

Valve body assembly


Off-vehicle repair matrix chart

-

No down-shift (4th -> 3rd)

Valve body assembly


Off-vehicle repair matrix chart

-

No down-shift (3rd -> 2nd)

Valve body assembly


Off-vehicle repair matrix chart

-

No down-shift (2nd -> 1st)

Valve body assembly


Off-vehicle repair matrix chart

-

No lock-up or no lock-up off

Shift solenoid valve SLU


Valve body assembly


Off-vehicle repair matrix chart

-

Harsh engagement (N -> D)

Shift solenoid valve SL1


Valve body assembly


C1 accumulator


Off-vehicle repair matrix chart

-

Harsh engagement (Lock-up)

Shift solenoid valve SLU


Valve body assembly


Off-vehicle repair matrix chart

-

Harsh engagement (N -> R)

Shift solenoid valve SLT


Shift solenoid valve SLU


Valve body assembly


C3 accumulator


Off-vehicle repair matrix chart

-

Harsh engagement (1st -> 2nd -> 3rd -> 4th -> 5th)

Shift solenoid valve SLT


Shift solenoid valve SL1


Valve body assembly


Harsh engagement (1st -> 2nd)

Valve body assembly


B3 accumulator


Off-vehicle repair matrix chart

-

Harsh engagement (2nd -> 3rd)

Valve body assembly


C3 accumulator


Off-vehicle repair matrix chart

-

Harsh engagement (3rd -> 4th)

Valve body assembly


C2 accumulator


Off-vehicle repair matrix chart

-

Harsh engagement (4th -> 5th)

Shift solenoid valve SL1


Shift solenoid valve SL2


Valve body assembly


Off-vehicle repair matrix chart

-

Harsh engagement (5th -> 4th)

Shift solenoid valve SL1


Shift solenoid valve SL2


Valve body assembly


Off-vehicle repair matrix chart

-

Slip or shudder (Forward and reverse)

Transmission control cable


Valve body assembly


Oil strainer


Off-vehicle repair matrix chart

-

No kick-down

Valve body assembly


Shift point too high or too low

Shift solenoid valve SLT


Shift solenoid valve SL1


Valve body assembly


Poor acceleration

Shift solenoid valve SLT


Valve body assembly


Engine stalls when starting off or stopping

Shift solenoid valve SLU


Valve body assembly


3. Chapter 3: Off-Vehicle Repair

Symptom

Suspected Area

See page

Vehicle does not move with shift lever in any forward position or reverse position

Rear planetary gear unit


Torque converter


Vehicle does not move with shift lever in R

Brake No. 4 (B4)


Clutch No. 3 (C3)


One-way clutch No. 1 (F1)


No up-shift (1st -> 2nd)

Brake No. 3 (B3)


One-way clutch No. 1 (F1)


One-way clutch No. 2 (F2)


No up-shift (2nd -> 3rd)

Clutch No. 3 (C3)


No up-shift (3rd -> 4th)

Clutch No. 2 (C2)


No up-shift (4th -> 5th)

Brake No. 1 (B1)


Clutch No. 1 (C1)


No lock-up or no lock-up off

Torque converter


Harsh engagement (N -> D)

Clutch No. 1 (C1)


One-way clutch No. 3 (F3)


Harsh engagement (N -> R)

Clutch No. 3 (C3)


Brake No. 4 (B4)


One-way clutch No. 1 (F1)


Harsh engagement (1st -> 2nd)

Brake No. 3 (B3)


One-way clutch No. 1 (F1)


One-way clutch No. 2 (F2)


Harsh engagement (2nd -> 3rd)

Clutch No. 3 (C3)


Harsh engagement (3rd -> 4th)

Clutch No. 2 (C2)


Harsh engagement (4th -> 5th)

Brake No. 1 (B1)


Clutch No. 1 (C1)


Harsh engagement (Lock-up)

Torque converter


Slip or shudder (Forward and reverse: After engine is warmed up)

One-way clutch No. 1 (F1)


Clutch No. 3 (C3)


Torque converter


Slip or shudder (Particular position: Just after engine starts)

Torque converter


Slip or shudder (R position)

Brake No. 4 (B4)


One-way clutch No. 1 (F1)


Clutch No. 3 (C3)


Slip or shudder (1st)

Clutch No. 1 (C1)


One-way clutch No. 3 (F3)


Slip or shudder (2nd)

Clutch No. 1 (C1)


Brake No. 3 (B3)


One-way clutch No. 1 (F1)


One-way clutch No. 2 (F2)


Slip or shudder (3rd)

Clutch No. 1 (C1)


Clutch No. 3 (C3)


One-way clutch No. 1 (F1)


Slip or shudder (4th)

Clutch No. 1 (C1)


Clutch No. 2 (C2)


Slip or shudder (5th)

Clutch No. 2 (C2)


Clutch No. 3 (C3)


Brake No. 1 (B1)


No engine braking (1st to 4th: D position)

Clutch No. 1 (C1)


Poor acceleration (All positions)

Torque converter


Poor acceleration (5th)

Clutch No. 1 (C1)


Clutch No. 3 (C3)


Brake No. 1 (B1)


Front planetary gear unit


Engine stalls when starting off or stopping

Torque converter


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