Toyota 4Runner: Problem Symptoms Table

Toyota 4Runner Service Manual / Drivetrain / A750e Automatic Transmission / Transaxle / Automatic Transmission System / 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*
No up-shift (3rd -> 4th)	ECM
No up-shift (1st -> 2nd)	Shift solenoid valve S2 circuit*
No up-shift (1st -> 2nd)	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*
No down-shift (2nd -> 1st)	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*
No lock-up off	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*
Up-shift to 5th from 4th while engine is cold	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*
Engine stalls when starting off or stopping	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
Vehicle does not move with shift lever in R	Off-vehicle repair matrix chart	-
No up-shift (1st -> 2nd)	Valve body assembly
No up-shift (1st -> 2nd)	Off-vehicle repair matrix chart	-
No up-shift (2nd -> 3rd)	Valve body assembly
No up-shift (2nd -> 3rd)	Off-vehicle repair matrix chart	-
No up-shift (3rd -> 4th)	Valve body assembly
No up-shift (3rd -> 4th)	Off-vehicle repair matrix chart	-
No up-shift (4th -> 5th)	Valve body assembly
No up-shift (4th -> 5th)	Off-vehicle repair matrix chart	-
No down-shift (5th -> 4th)	Valve body assembly
No down-shift (5th -> 4th)	Off-vehicle repair matrix chart	-
No down-shift (4th -> 3rd)	Valve body assembly
No down-shift (4th -> 3rd)	Off-vehicle repair matrix chart	-
No down-shift (3rd -> 2nd)	Valve body assembly
No down-shift (3rd -> 2nd)	Off-vehicle repair matrix chart	-
No down-shift (2nd -> 1st)	Valve body assembly
No down-shift (2nd -> 1st)	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
Poor acceleration	Valve body assembly
Engine stalls when starting off or stopping	Shift solenoid valve SLU
Engine stalls when starting off or stopping	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)
No up-shift (4th -> 5th)	Clutch No. 1 (C1)
No lock-up or no lock-up off	Torque converter
Harsh engagement (N -> D)	Clutch No. 1 (C1)
Harsh engagement (N -> D)	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)
Harsh engagement (4th -> 5th)	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)
Slip or shudder (1st)	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)
Slip or shudder (4th)	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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