Toyota Sequoia (2005). Manual — part 208
–
DIAGNOSTICS
AUTOMATIC TRANSMISSION
DI–627
821
Vehicle speed
(During transition from 4th to 5th gear)
–
Less than 100 km/h (62.2 mph)
ON malfunction (E)
ECM selected gear
5th
Engine speed – Turbine speed (NE – NT)
(After transition from 4th to 5th gear)
–
Less than 150 rpm
Vehicle speed
(After transition from 4th to 5th gear)
–
Less than 100 km/h (62 mph)
TYPICAL MALFUNCTION THRESHOLDS
Detection criteria
Threshold
Both of the following conditions are met:
ON
lf
ti
(A)
d (B)
ON
lf
ti
(C)
ON malfunctions (A) and (B), or ON malfunction (C)
ON malfunction (D) or (E)
ON malfunction (A)
Turbine speed/Output speed
3.30 to 7.50
ON malfunction (B)
Turbine speed/Output speed
1.28 to 1.53
ON malfunction (C)
Turbine speed/Output speed
0.93 to 1.07
ON malfunction (D)
Turbine speed – Output speed x 4th gear ratio
(NT – NO x 4th gear ratio)
1,000 rpm or more
ON malfunction (E)
Turbine speed – Output speed x 5th gear ratio
(NT – NO x 5th gear ratio)
1,000 rpm or more
ECM command gearshift
Shift solenoid valve SL2
1st
2nd
3rd
4th
5th
OFF
ON
ON
ON
ON
DI–628
–
DIAGNOSTICS
AUTOMATIC TRANSMISSION
822
INSPECTION PROCEDURE
HINT:
Performing the ACTIVE TEST using the hand–held tester allows the relay, VSV, actuator and so on to oper-
ate without parts removal. Performing the ACTIVE TEST as the first step of troubleshooting is one method
to shorten labor time.
It is possible to display the DATA LIST during the ACTIVE TEST.
(a)
Warm up the engine.
(b)
Turn the ignition switch off.
(c)
Connect the hand–held tester to the DLC3.
(d)
Turn the ignition switch to the ON position.
(e)
Turn on the tester.
(f)
Select the item ”DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST”.
(g)
According to the display on the tester, perform the ”ACTIVE TEST”.
HINT:
While driving, the shift position can be forcibly changed with the hand–held tester.
Comparing the shift position commanded by the ACTIVE TEST with the actual shift position enables you
to confirm the problem (See page
).
Item
Test Details
Diagnostic Note
SHIFT
[Test Details]
Operate the shift solenoid valve and set each shift position by yourself.
[Vehicle Condition]
Less than 50 km/h (31 mph)
[Others]
Press ”
→
” button: Shift up
Press ”
←
” button: Shift down
Possible to check the operation of
the shift solenoid valves.
HINT:
This test can be conducted when the vehicle speed is 50 km/h (31 mph) or less.
The 4th to 5th up–shiftings must be performed with the accelerator pedal released.
The 5th to 4th down–shiftings must be performed with the accelerator pedal released.
Do not operate the accelerator pedal for at least 2 seconds after shifting and do not shift successively.
The shift position commanded by the ECM is shown in the DATA LIST (SHIFT) display on the hand–
held tester.
The shift solenoid valve SL2 is turned on/off normally when the shift lever is in the D position:
–
DIAGNOSTICS
AUTOMATIC TRANSMISSION
DI–629
823
1
Check other DTCs output (in addition to DTC P0776).
PREPARATION:
(a)
Turn the ignition switch off.
(b)
Connect the OBD II scan tool or hand–held tester to the DLC3.
(c)
Turn the ignition switch to the ON position.
(d)
Turn on the tester.
(e)
Select the item ”DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES”.
CHECK:
Read the DTCs using the OBD II scan tool or the hand–held tester.
RESULT:
Display (DTC output)
Proceed to
Only ”P0776” is output
A
”P0776” and other DTCs
B
HINT:
If any other codes besides ”P0776” are output, perform troubleshooting for those DTCs first.
B
).
A
D12795
1
2
(–)
(+)
1
2
Shift Solenoid Valve SL2:
DI–630
–
DIAGNOSTICS
AUTOMATIC TRANSMISSION
824
2
Inspect shift solenoid valve SL2.
PREPARATION:
Remove the shift solenoid valve SL2 (See page
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester Connection
Specified Condition
20
C (68
F)
1 – 2
5.0 to 5.6
Ω
CHECK:
Connect the positive (+) lead with a 21 W bulb to terminal 2 and
the negative (–) lead to terminal 1 of the solenoid valve connec-
tor, then check the movement of the valve.
OK:
The solenoid makes an operating sound.
NG
Replace the shift solenoid valve SL2
(See page
OK
3
Inspect valve body
OK:
There are no foreign objects on each valve.
NG
Repair or replace valve body.
OK
Repair or replace transmission (See page
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