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Toyota Sequoia (2005). Manual - part 189

DIDIW–01

–

DIAGNOSTICS

AUTOMATIC TRANSMISSION

DI–551

745

MONITOR DRIVE PATTERN

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)

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.

DI–552

–

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

DI–573

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

2. Shift solenoid valve (S2) circuit

3. ECM