Toyota Tacoma (2015-2018) Service Manual: Problem Symptoms Table

Toyota Tacoma (2015-2018) Service Manual / Ac60e Automatic Transmission / Transaxle / Automatic Transmission System(for 2gr-fks) / 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.
The Matrix Chart is divided into 2 chapters. When troubleshooting, check Chapter 1 first. If instructions are given in Chapter 1 to proceed to 2, proceed as instructed.
If the instruction "Proceed to Next Suspected Area Shown in Problem Symptoms Table" is given in the flowchart for each circuit, proceed to the next suspected area in the table.
If the problem still occurs even though there are no malfunctions in any of the 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
No up-shift (1st to 2nd)	Shift solenoid valve SL3 circuit*
No up-shift (1st to 2nd)	ECM
No up-shift (2nd to 3rd)	Shift solenoid valve SL4 circuit*
No up-shift (2nd to 3rd)	ECM
No up-shift (3rd to 4th)	Shift solenoid valve SL2 circuit*
	Engine coolant temperature sensor circuit*
	ECM
No up-shift (4th to 5th)	Shift solenoid valve SL1 circuit*
	Shift solenoid valve SL4 circuit*
	Engine coolant temperature sensor circuit*
	ECM
No up-shift (5th to 6th)	Shift solenoid valve SL3 circuit*
	Shift solenoid valve SL4 circuit*
	Engine coolant temperature sensor circuit*
	ECM
No down-shift (6th to 5th)	Shift solenoid valve SL4 circuit*
No down-shift (6th to 5th)	ECM
No down-shift (5th to 4th)	Shift solenoid valve SL1 circuit*
No down-shift (5th to 4th)	ECM
No down-shift (4th to 3rd)	Shift solenoid valve SL2 circuit*
	Shift solenoid valve SL4 circuit*
	ECM
No down-shift (3rd to 2nd)	Shift solenoid valve SL3 circuit*
	Shift solenoid valve SL4 circuit*
	ECM
No down-shift (2nd to 1st)	Shift solenoid valve SL3 circuit*
No down-shift (2nd to 1st)	ECM
No lock-up or no lock-up off	Shift solenoid valve SLU circuit*
	Shift solenoid valve SL circuit*
	Transmission revolution sensor (NT) circuit*
	Transmission revolution sensor (SP2) circuit*
	Engine coolant temperature sensor circuit*
	Stop light switch circuit*
	No. 1 ATF temperature sensor circuit*
	ECM
Shift point too high or too low	Throttle position sensor circuit*
	Shift solenoid valve SLT circuit*
	Transmission revolution sensor (NT) circuit*
	Transmission revolution sensor (SP2) circuit*
	Park/neutral position switch circuit*
	No. 1 ATF temperature sensor circuit*
	Pattern select switch power mode circuit
	ECM
No gear change by moving shift lever to "+" or "-" while in S	Transmission control switch circuit
	ECM
Harsh engagement (N to D)	Shift solenoid valve SLT circuit*
Harsh engagement (N to D)	ECM
Harsh engagement (Any driving position)	Throttle position sensor circuit*
	Shift solenoid valve SL1 circuit*
	Shift solenoid valve SL2 circuit*
	Shift solenoid valve SL3 circuit*
	Shift solenoid valve SL4 circuit*
	Shift solenoid valve SLT circuit*
	Shift solenoid valve SLU circuit*
	Shift solenoid valve SL circuit*
	ECM
Harsh engagement (Lock-up)	Shift solenoid valve SLU circuit*
	Shift solenoid valve SL circuit*
	Transmission revolution sensor (NT) circuit*
	Transmission revolution sensor (SP2) circuit*
	ECM
Poor acceleration	Shift solenoid valve SLT circuit*
	No. 2 ATF temperature sensor circuit*
	ECM
Shifting malfunction (Vehicle is stuck in 3rd or 5th gear)	ECM power source circuit
Changing gears takes time when up-shifting	Shift solenoid valve SL circuit*
No engine braking	ECM
No kick-down	ECM
Slip or shudder (5th to 6th and 6th to 5th)	Shift solenoid valve SL circuit*
ATF temperature warning indicator remains on	No. 2 ATF temperature sensor circuit*
	Engine coolant temperature sensor circuit*
	ECM
Lock-up in 3rd gear	No. 2 ATF temperature sensor circuit*
	Engine coolant temperature sensor circuit*
	ECM
Vehicle moves forward with shift lever in N	Park/neutral position switch circuit*
Vehicle moves forward with shift lever in N	ECM
Engine stalls when starting off or stopping	Shift solenoid valve SLU circuit*
Engine stalls when starting off or stopping	ECM
Shifting malfunction	Park/neutral position switch circuit*
	Transmission control switch circuit
	ECM

2. Chapter 2: On-Vehicle Repair and Off-Vehicle Repair

Symptom	Suspected Area	See page
Vehicle does not move when shift lever is in any forward position or reverse position	Transmission control cable
	Manual valve
	Parking lock pawl
	Rear planetary gear unit
	Torque converter assembly
Vehicle does not move with shift lever in R	Valve body assembly
	No. 2 brake (B2)
	No. 3 brake (B3)
	Shift solenoid valve SL4*
No up-shift (1st to 2nd)	Valve body assembly
	No. 1 brake (B1)
	Shift solenoid valve SL3*
No up-shift (2nd to 3rd)	Valve body assembly
	No. 3 brake (B3)
	Shift solenoid valve SL4*
No up-shift (3rd to 4th)	Valve body assembly
	No. 2 clutch (C2)
	Shift solenoid valve SL2*
No up-shift (4th to 5th)	Valve body assembly
	No. 3 brake (B3)
	Shift solenoid valve SL4*
	Shift solenoid valve SL1*
No up-shift (5th to 6th)	Valve body assembly
	No. 1 brake (B1)
	Shift solenoid valve SL3*
	Shift solenoid valve SL4*
No down-shift (6th to 5th)	No. 3 brake (B3)
	Shift solenoid valve SL4*
	Valve body assembly
No down-shift (5th to 4th)	Shift solenoid valve SL1*
	No. 1 clutch (C1)
	Valve body assembly
No down-shift (4th to 3rd)	No. 3 brake (B3)
	Shift solenoid valve SL4*
	Shift solenoid valve SL2*
	Valve body assembly
No down-shift (3rd to 2nd)	No. 1 brake (B1)
	Shift solenoid valve SL3*
	Shift solenoid valve SL4*
	Valve body assembly
No down-shift (2nd to 1st)	Valve body assembly
No down-shift (2nd to 1st)	Shift solenoid valve SL3*
No lock-up or No lock-up off	Valve body assembly
No lock-up or No lock-up off	Torque converter assembly
Harsh engagement (N to D)	Valve body assembly
	No. 3 one-way clutch (F3)
	No. 1 clutch (C1)
	Shift solenoid valve SL1*
Harsh engagement (Lock-up)	Valve body assembly
	Torque converter assembly
	Shift solenoid valve SLU*
Harsh engagement (N to R)	Valve body assembly
	No. 2 brake (B2)
	No. 3 brake (B3)
	Shift solenoid valve SL4*
Harsh engagement (1st to 2nd to 3rd to 4th to 5th to 6th)	Valve body assembly
Harsh engagement (1st to 2nd to 3rd to 4th to 5th to 6th)	Shift solenoid valve SLT*
Harsh engagement (1st to 2nd)	Valve body assembly
	No. 1 brake (B1)
	Shift solenoid valve SL3*
Harsh engagement (2nd to 3rd)	Valve body assembly
	No. 3 brake (B3)
	Shift solenoid valve SL4*
Harsh engagement (3rd to 4th)	Valve body assembly
	No. 2 clutch (C2)
	Shift solenoid valve SL2*
Harsh engagement (4th to 5th)	Valve body assembly
	No. 3 brake (B3)
	Shift solenoid valve SL4*
Harsh engagement (5th to 6th)	Valve body assembly
	No. 1 brake (B1)
	Shift solenoid valve SL3*
Harsh engagement (6th to 5th)	Valve body assembly
	No. 3 brake (B3)
	Shift solenoid valve SL4*
Slip or shudder (forward and reverse, after warm-up)	Transmission control cable
	Valve body assembly
	Oil strainer
	No. 1 brake (B1)
	No. 2 brake (B2)
	No. 3 brake (B3)
	No. 3 one-way clutch (F3)
	No. 1 clutch (C1)
	No. 2 clutch (C2)
	Torque converter assembly
Slip or shudder (particular position, just after engine starts)	Torque converter assembly
Slip or shudder (shift lever in R)	No. 2 brake (B2)
Slip or shudder (shift lever in R)	No. 3 brake (B3)
Slip or shudder (1st)	No. 3 one-way clutch (F3)
Slip or shudder (1st)	No. 1 clutch (C1)
Slip or shudder (2nd)	No. 1 brake (B1)
Slip or shudder (2nd)	No. 1 clutch (C1)
Slip or shudder (3rd)	No. 3 brake (B3)
Slip or shudder (3rd)	No. 1 clutch (C1)
Slip or shudder (4th)	No. 1 clutch (C1)
Slip or shudder (4th)	No. 2 clutch (C2)
Slip or shudder (5th)	No. 3 brake (B3)
Slip or shudder (5th)	No. 2 clutch (C2)
Slip or shudder (6th)	No. 1 brake (B1)
Slip or shudder (6th)	No. 2 clutch (C2)
No engine braking (1st to 4th, shift lever in S)	No. 1 clutch (C1)
No engine braking (1st)	Valve body assembly
	No. 2 brake (B2)
	No. 1 clutch (C1)
No kick-down	Valve body assembly
Shift point too high or too low	Valve body assembly
Poor acceleration (All positions)	Valve body assembly
Poor acceleration (All positions)	Torque converter assembly
Poor acceleration (6th)	No. 1 brake (B1)
	No. 2 clutch (C2)
	Front planetary gear unit
Engine stalls when starting off or stopping	Valve body assembly
Engine stalls when starting off or stopping	Torque converter assembly

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