Toyota Sequoia (2005). Manual — part 189
DIDIW–01
–
DIAGNOSTICS
AUTOMATIC TRANSMISSION
DI–551
745
MONITOR DRIVE PATTERN
1.
MONITOR DRIVE PATTERN FOR ECT TEST
(a)
Perform this drive pattern as one method to simulate the detection conditions of the ECT malfunctions.
(The DTCs may not be detected due to the actual driving conditions. And some codes may not be de-
tected through this drive pattern.)
HINT:
Preparation for driving
Warm up the engine sufficiently. (Engine coolant temperature is 60
°
C (140
°
F) or higher).
Drive the vehicle when the atmospheric temperature is –10
°
C (14
°
F) or higher. (Malfunction is not
detected when the atmospheric temperature is –10
°
C (14
°
F) or less).
Notice in driving
Drive the vehicle through all gears.
Stop
→
1st
→
2nd
→
3rd
→
4th
→
5th
→
5th (lock–up ON).
Repeat the above driving pattern three times or more.
NOTICE:
The monitor status can be checked using the OBD II scan tool. When using the hand–held tes-
ter, monitor status can be found in the ”ENHANCED OBD II / DATA LIST” or under ”CARB OBD
II”.
In the event that the drive pattern must be interrupted (possibly due to traffic conditions or other
factors), the drive pattern can be resumed and, in most cases, the monitor can be completed.
Perform this drive pattern on a level road as much as possible and strictly observe the posted
speed limits and traffic laws while driving.
D14144
Warmed up
sufficiently
Approx.100 km/h
(62 mph)
Vehicle Speed
Approx. 80 km/h
(50 mph)
0
Normal acceleration
through all the gears from 1st to 5th
Lock–up ON
Vehicle Speed
Stop
(Idling)
Maintain a constant speed or gradual acceleration (with the throttle open)
for 3 minutes or more.
*1
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DIAGNOSTICS
AUTOMATIC TRANSMISSION
746
HINT:
*1: Drive at such a speed in the uppermost gear, to engage lock–up. The vehicle can be driven at a speed
lower than that in the above diagram under the lock–up condition.
NOTICE:
It is necessary to drive the vehicle for approximately 30 minutes to detect DTC P0711 (ATF tempera-
ture sensor malfunction).
DIDIX–01
–
DIAGNOSTICS
AUTOMATIC TRANSMISSION
DI–553
747
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 on the following pages and proceed
to the page given for troubleshooting.
The Matrix Chart is divided into 3 chapters.
1.
Chapter 1: Electronic Circuit Matrix Chart
Refer to the table below when the trouble cause is considered to be electrical.
If the instruction ”Proceed to next circuit inspection shown on matrix chart” is given in the flow chart
of each circuit, proceed to the circuit with the next highest number 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.
HINT:
*1: When the circuit on which mark *1 is attached is defective, DTC could be output (see page
Symptom
Suspect Area
See page
No up–shift
(A particular gear, from 1st to 4th gear, is not up–shifted)
1. Shift solenoid valve (S1) circuit
*1
2. Shift solenoid valve (S2) circuit
*1
3. ECM
No up–shift (4th
→
5th)
1. O/D main switch circuit
2. Engine coolant temp. sensor circuit
*1
3. Speed sensor NT circuit
*1
4. Shift solenoid valve (SL1) circuit
*1
5. Shift solenoid valve (SL2) circuit
*1
6. Shift solenoid valve (SR) circuit
*1
7. ECM
No up–shift (3rd
→
4th)
1. Engine coolant temp. sensor circuit
*1
2. Shift solenoid valve (S2) circuit
*1
3. ECM
No up–shift (1st
→
2nd)
1. Shift position L switch circuit
2. Shift solenoid valve (S2) circuit
*1
3. ECM
No down–shift (5th
→
4th)
1. O/D main switch circuit
2. Shift solenoid valve (SL1) circuit
*1
3. Shift solenoid valve (SL2) circuit
*1
4. Shift solenoid valve (SR) circuit
*1
5. ECM
No down–shift (2nd
→
1st)
1. Shift position L switch circuit
2. Shift solenoid valve (S2) circuit
*1
3. ECM
No down–shift
(A particular gear, from 1st to 4th gear, is not down–shifted)
1. Shift solenoid valve (S1) circuit
*1
2. Shift solenoid valve (S2) circuit
*1
3. ECM
No lock–up
1. ATF temperature sensor circuit
*1
2. Stop light switch circuit
*1
3. Speed sensor NT circuit
*1
4. Shift solenoid valve (SLU) circuit
*1
5. Engine coolant temp. sensor circuit
*1
6. ECM
No lock–up off
4. Shift solenoid valve (SLU) circuit
*1
6. ECM
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DIAGNOSTICS
AUTOMATIC TRANSMISSION
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Shift point too high or too low
1. Shift solenoid valve (SLT) circuit
*1
2. Speed sensor NT circuit
*1
3. Speed sensor SP2 circuit
*1
4. Throttle position sensor circuit
*1
5. ATF temperature sensor circuit
*1
6. ECM
Up–shift to 5th from 4th while shift lever is in 4 position
1. O/D main switch circuit
2. ECM
Up–shift to 5th from 4th while engine is cold
1. Engine coolant temp. sensor circuit
*1
2. ECM
Up–shift to 4th from 3rd while shift lever is in 3 position
1. Park/neutral position switch circuit
*1
2. ECM
Up–shift to 3rd from 2nd while shift lever is in 2 position
1. Park/neutral position switch circuit
*1
2. ECM
Up–shift to 2nd from 1st while shift lever is in L position
1. Shift position L switch circuit
2. ECM
Harsh engagement (N
→
D)
1. Speed sensor NT circuit
*1
2. Shift solenoid valve (SL1) circuit
*1
3. Shift solenoid valve (SLT) circuit
*1
4. ECM
Harsh engagement (Lock–up)
1. Speed sensor NT circuit
*1
2. Speed sensor SP2 circuit
*1
3. Shift solenoid valve (SLU) circuit
*1
4. ECM
Harsh engagement (Any driving position)
ECM
Poor acceleration
1. ATF temperature sensor No.2 circuit
*1
2. Engine coolant temp. sensor circuit
*1
3. Shift solenoid valve (SLT) circuit
*1
4. ECM
No engine braking
ECM
No kick–down
ECM
Engine stalls when starting off or stopping
1. Shift solenoid valve (SLU) circuit
*1
2. ECM
AT Oil Temp. warning light remains on
1. ATF temperature sensor No.2 circuit
*1
Lock–up at 3rd gear
1. ATF temperature sensor No.2 circuit
1
2. Engine coolant temp. sensor circuit
*1
Shift point too high
2. Engine coolant tem . sensor circuit
3. ECM
Malfunction in shifting
1. Park/neutral position switch circuit
*1
2. ECM
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