| Last Modified: 11-29-2007 | 1.6 T | |
| Service Category: Drivetrain | Section: Automatic Transmission/Transaxle | |
| Model Year: 2008 | Model: Sequoia | Doc ID: RM000000W73093X |
| Title: AB60F AUTOMATIC TRANSMISSION / TRANSAXLE: AUTOMATIC TRANSMISSION SYSTEM: PROBLEM SYMPTOMS TABLE (2008 Sequoia) | ||
PROBLEM SYMPTOMS TABLE
HINT:
- Use the table below to help determine the cause of the problem symptom. 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 Circuit Inspection 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* |
|
|
ECM |
|
|
|
No up-shift (2nd -> 3rd) |
Shift solenoid valve S2 circuit* |
|
|
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* |
|
|
Engine coolant temperature sensor 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* |
|
|
ECM |
|
|
|
No down-shift (3rd -> 2nd) |
Shift solenoid valve S2 circuit* |
|
|
ECM |
|
|
|
No down-shift (2nd -> 1st) |
Shift solenoid valve S1 circuit* |
|
|
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* |
|
|
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* |
|
|
|
Tow/haul pattern select switch circuit |
|
|
|
No. 1 ATF temperature sensor circuit* |
|
|
|
ECM |
|
|
|
Up-shift to 4th from 3rd while engine is cold |
Engine coolant temperature sensor circuit* |
|
|
ECM |
|
|
|
Up-shift to 5th from 4th while engine is cold |
Engine coolant temperature sensor circuit* |
|
|
ECM |
|
|
|
No gear change by shifting into "+" or "-" while shift lever on 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* |
|
|
ECM |
|
|
|
"A/T OIL TEMP" warning light remains on, lock-up at 3rd gear and/or shift point too high |
No. 2 ATF temperature sensor circuit* |
|
|
Engine coolant temperature sensor circuit* |
|
|
|
ECM |
|
|
|
Malfunction in shifting |
Park/Neutral position switch circuit* |
|
|
Transmission control switch circuit |
|
|
|
ECM |
|
|
|
Harsh engagement (1st -> 2nd -> 3rd -> 4th -> 5th) |
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 and reverse position |
Transmission control cable |
|
|
Manual valve |
|
|
|
Parking lock pawl |
|
|
|
Rear planetary gear unit |
|
|
|
Torque converter clutch |
|
|
|
Vehicle does not move with shift lever in R |
Valve body assembly |
|
|
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 |
|
|
C3 clutch |
|
|
|
No up-shift (3rd -> 4th) |
Valve body assembly |
|
|
C2 clutch |
|
|
|
No up-shift (4th -> 5th) |
Valve body assembly |
|
|
B1 brake |
|
|
|
No up-shift (5th -> 6th) |
Valve body assembly |
|
|
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 |
|
|
Torque converter clutch |
|
|
|
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 |
|
|
Torque converter clutch |
|
|
|
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 |
|
|
Valve body assembly |
|
|
|
Oil strainer |
|
|
|
F1 one-way clutch |
|
|
|
C3 clutch |
|
|
|
Torque converter clutch |
|
|
|
Slip or shudder (particular position, just after engine starts) |
Torque converter clutch |
|
|
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 |
|
|
B2 brake |
|
|
|
No engine braking (1st to 4th, shift lever in S) |
C4 clutch |
|
|
No engine braking (1st: shift lever on 1) |
Valve body assembly |
|
|
B4 brake |
|
|
|
No engine braking (2nd: shift lever on 2) |
Valve body assembly |
|
|
B2 brake |
|
|
|
No engine braking (3rd: shift lever on 3) |
Valve body assembly |
|
|
B1 brake |
|
|
|
No engine braking (4th: shift lever on 4) |
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 |
|
|
Torque converter clutch |
|
|
|
Poor acceleration (6th) |
B2 brake |
|
|
C2 clutch |
|
|
|
Front planetary gear unit |
|
|
|
Engine stalls when starting off or stopping |
Valve body assembly |
|
|
Torque converter clutch |
|
|
|