Toyota Tundra Service Manual: Problem Symptoms Table

Toyota Tundra Service Manual / Engine, Hybrid System / A760e 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.
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 a 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 -> 2nd)	Shift solenoid valve S1 circuit*
No up-shift (1st -> 2nd)	ECM
No up-shift (2nd -> 3rd)	Shift solenoid valve S2 circuit*
No up-shift (2nd -> 3rd)	ECM
No up-shift (3rd -> 4th)	Shift solenoid valve S3 circuit*
	Engine coolant temperature sensor circuit*
	ECM
No up-shift (4th -> 5th)	Shift solenoid valve S4 circuit*
	Shift solenoid valve SR circuit*
	Shift solenoid valve SL1 circuit*
	Shift solenoid valve SL2 circuit*
	Engine coolant temperature sensor circuit*
	ECM
No up-shift (5th -> 6th)	Park/neutral position switch circuit*
	Shift solenoid valve S2 circuit*
	ECM
No down-shift (6th -> 5th)	Park/neutral position switch circuit*
	Shift solenoid valve S2 circuit*
	ECM
No down-shift (5th -> 4th)	Shift solenoid valve S4 circuit*
	Shift solenoid valve SR circuit*
	Shift solenoid valve SL1 circuit*
	Shift solenoid valve SL2 circuit*
	ECM
No down-shift (4th -> 3rd)	Shift solenoid valve S3 circuit*
No down-shift (4th -> 3rd)	ECM
No down-shift (3rd -> 2nd)	Shift solenoid valve S2 circuit*
No down-shift (3rd -> 2nd)	ECM
No down-shift (2nd -> 1st)	Shift solenoid valve S1 circuit*
No down-shift (2nd -> 1st)	ECM
No lock-up or no lock-up off	Shift solenoid valve SLU circuit*
	Stop light switch circuit*
	ECM
No lock-up	No. 1 ATF temperature sensor circuit*
	Shift solenoid valve SLU circuit*
	Engine coolant temperature sensor circuit*
	Stop light switch circuit*
	Speed sensor NT 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 4th from 3rd while engine is cold	Engine coolant temperature sensor circuit*
Up-shift to 4th from 3rd while engine is cold	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
No gear change by moving shift lever to "+" or "-" while shift lever in S	Transmission control switch circuit
	ECM
Harsh engagement (N -> D)	Shift solenoid valve SLT circuit*
	Speed sensor NT circuit*
	ECM
Harsh engagement (lock-up)	Speed sensor NT circuit*
	Speed sensor SP2 circuit*
	Shift solenoid valve SLU circuit*
	ECM
Harsh engagement (any driving position)	Throttle position sensor circuit*
	Shift solenoid valve SL1 circuit*
	Shift solenoid valve SL2 circuit*
	Shift solenoid valve SLU circuit*
	Shift solenoid valve SLT circuit*
	Speed sensor NT circuit*
	ECM
Poor acceleration	No. 2 ATF temperature sensor circuit*
	Shift solenoid valve SLT circuit*
	ECM
No engine brake	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
"A/T OIL TEMP" 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
Shifting malfunction	Park/neutral position switch circuit*
	Transmission control switch circuit
	ECM
Harsh engagement (1st -> 2nd -> 3rd -> 4th -> 5th -> 6th)	Shift solenoid valve SR circuit*
Slip or shudder (5th -> 6th and 6th -> 5th)	Shift solenoid valve SR circuit*

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 (for Column Shift Type)
	Transmission control cable (for Floor Shift Type)
	Manual valve
	Parking lock pawl
	Rear planetary gear unit
	Torque converter
Vehicle does not move with shift lever in R	Valve body assembly
Vehicle does not move with shift lever in R	B4 brake
No up-shift (1st -> 2nd)	Valve body assembly
	B3 brake
	F1 one-way clutch
	F2 one-way clutch
No up-shift (2nd -> 3rd)	Valve body assembly
No up-shift (2nd -> 3rd)	C3 clutch
No up-shift (3rd -> 4th)	Valve body assembly
No up-shift (3rd -> 4th)	C2 clutch
No up-shift (4th -> 5th)	Valve body assembly
No up-shift (4th -> 5th)	B1 brake
No up-shift (5th -> 6th)	Valve body assembly
No up-shift (5th -> 6th)	B2 brake
No down-shift (6th -> 5th)	Valve body assembly
No down-shift (5th -> 4th)	Valve body assembly
No down-shift (4th -> 3rd)	Valve body assembly
No down-shift (3rd -> 2nd)	Valve body assembly
No down-shift (2nd -> 1st)	Valve body assembly
No lock-up or no lock-up off	Valve body assembly
No lock-up or no lock-up off	Torque converter
Harsh engagement (N -> D)	Valve body assembly
	C1 accumulator
	C1 clutch
	F3 one-way clutch
	F4 one-way clutch
Harsh engagement (lock-up)	Valve body assembly
Harsh engagement (lock-up)	Torque converter
Harsh engagement (N -> R)	Valve body assembly
	C3 accumulator
	C3 clutch
	B4 brake
	F1 one-way clutch
Harsh engagement (1st -> 2nd -> 3rd -> 4th -> 5th -> 6th)	Valve body assembly
Harsh engagement (1st -> 2nd)	Valve body assembly
	B3 accumulator
	B3 brake
	F1 one-way clutch
	F2 one-way clutch
Harsh engagement (2nd -> 3rd)	Valve body assembly
	C3 accumulator
	C3 clutch
Harsh engagement (3rd -> 4th)	Valve body assembly
	C2 accumulator
	C2 clutch
Harsh engagement (4th -> 5th)	Valve body assembly
	B1 accumulator
	B1 brake
Harsh engagement (5th -> 6th)	Valve body assembly
	B2 accumulator
	B2 brake
Harsh engagement (6th -> 5th)	Valve body assembly
	C3 accumulator
	C3 clutch
Slip or shudder (forward and reverse, after warm-up)	Transmission control cable (for Column Shift Type)
	Transmission control cable (for Floor Shift Type)
	Valve body assembly
	Oil strainer
	F1 one-way clutch
	C3 clutch
	Torque converter
Slip or shudder (particular position, just after engine starts)	Torque converter
Slip or shudder (shift lever in R)	B4 brake
	F1 one-way clutch
	C3 clutch
Slip or shudder (1st)	C1 clutch
	F3 one-way clutch
	F4 one-way clutch
Slip or shudder (2nd)	C1 clutch
	B3 brake
	F1 one-way clutch
	F2 one-way clutch
	F4 one-way clutch
Slip or shudder (3rd)	C1 clutch
	C3 clutch
	F1 one-way clutch
	F4 one-way clutch
Slip or shudder (4th)	C1 clutch
	C2 clutch
	F4 one-way clutch
Slip or shudder (5th)	C2 clutch
	C3 clutch
	B1 brake
Slip or shudder (6th)	C2 clutch
Slip or shudder (6th)	B2 brake
No engine braking (1st to 4th, shift lever in S)	C4 clutch
No engine braking (1st)	Valve body assembly
No engine braking (1st)	B4 brake
No engine braking (2nd)	Valve body assembly
No engine braking (2nd)	B2 brake
No engine braking (3rd)	Valve body assembly
No engine braking (3rd)	B1 brake
No engine braking (4th)	Valve body assembly
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
Poor acceleration (6th)	B2 brake
	C2 clutch
	Front planetary gear unit
Engine stalls when starting off or stopping	Valve body assembly
Engine stalls when starting off or stopping	Torque converter

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Toyota Tundra Service Manual: Problem Symptoms Table

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