| Last Modified: 11-29-2007 | 1.6 T | |
| Service Category: Drivetrain | Section: Automatic Transmission/Transaxle | |
| Model Year: 2008 | Model: Sequoia | Doc ID: RM000000W7309TX |
| Title: A750E AUTOMATIC TRANSMISSION / TRANSAXLE: AUTOMATIC TRANSMISSION SYSTEM: PROBLEM SYMPTOMS TABLE (2008 Sequoia) | ||
PROBLEM SYMPTOMS TABLE
HINT:
- If a normal code is displayed during the diagnostic trouble code check although the trouble still occurs, check the electrical circuits for each symptom in the order given in the charts below and proceed to the "See page".
-
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 Circuit Inspection Shown in Problem Symptoms Table"" is given in the flowchart of a circuit, proceed to the next circuit 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 and replace the ECM.
- *: 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 to 4th gear do not occur |
Shift solenoid valve S1 circuit* |
|
|
Shift solenoid valve S2 circuit* |
|
|
|
ECM |
|
|
|
No up-shift (4th -> 5th) |
Engine coolant temperature sensor circuit* |
|
|
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) |
Engine coolant temperature sensor circuit* |
|
|
Shift solenoid valve S2 circuit* |
|
|
|
ECM |
|
|
|
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* |
|
|
ECM |
|
|
|
Down-shifts between 4th to 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 driving 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 |
|
|
|
"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 |
|
|
|
No gear change by shifting into "+" or "-" while shift lever in S |
Transmission control switch circuit |
|
|
ECM |
|
|
|
Malfunction in shifting |
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 and 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 and reverse position |
Rear planetary gear unit |
|
|
Torque converter clutch |
|
|
|
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 clutch |
|
|
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 clutch |
|
|
Slip or shudder (Forward and reverse: After engine is warmed up) |
One-way clutch No. 1 (F1) |
|
|
Clutch No. 3 (C3) |
|
|
|
Torque converter clutch |
|
|
|
Slip or shudder (Particular position: Just after engine starts) |
Torque converter clutch |
|
|
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 clutch |
|
|
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 clutch |
|
|
|