Toyota Celica 2005 Repair Manual page 979

DI−778
(b) Measure the time lag.
When the shift lever is shifted while the engine is idling, there will be a certain time lapse or lag before
the shock can be felt. This is used for checking the condition of the No. 2 one−way clutch, reverse
clutch, forward clutch, and 1st & reverse brake.
NOTICE:
Do the test at normal operating fluid temperature 50 to 80 °C (122 to 176 °F).
S
Be sure to allow 1 minute interval between tests.
S
Take 3 measurements and take the average value.
S
(1) Connect an OBD II scan tool or hand−held tester to DLC3.
(2) Fully apply the parking brake.
(3) Start the engine and check idle speed.
Idle speed: 750 ± 50 rpm (In N position and air conditioner OFF)
(4) Shift the shift lever from N to D position. Using a stop watch, measure the time from when the
lever is shifted until the shock is felt.
Time lag: N → D Less than 1.2 seconds
(5) In the same manner, measure the time lag for N → R.
Time lag: N → R Less than 1.5 seconds
Evaluation (If N → D time or N → R time lag is longer than specified):
N → D time lag is longer
N → R time lag is longer
13. HYDRAULIC TEST
Measure the line pressure.
NOTICE:
Do the test at normal operation fluid temperature 50 to 80 °C (122 to 176 °F)
S
The line pressure test should always be carried out in pairs. One technician should observe
S
the conditions of wheels or wheel stoppers outside the vehicle while the other is doing the test.
Be careful to prevent SST's hose from interfering with the exhaust pipe.
S
(1) Warm up the ATF.
(2) Remove the test plug on the transaxle case front left side and connect SST (See page AX−30
for the location to connect SST).
SST 09992−00095 (09992−00231, 09992−00271)
(3) Fully apply the parking brake and check the 4 wheels.
(4) Connect an OBD II scan tool or hand−held tester to DLC3.
(5) Start the engine and check idling speed.
(6) Keep your left foot pressed firmly on the brake pedal and shift into D position.
(7) Measure the line pressure when the engine is idling.
(8) Depress the accelerator pedal all the way down. Quickly read the highest line pressure when
engine speed reaches stall speed.
(9) In the same manner, do the test in R position.
Specified line pressure:
Condition
Idling
Stall
If the measured pressure is not within specification, recheck the throttle cable adjustment and retest.
2005 CELICA (RM1131U)
DIAGNOSTICS
Problem
D position
372 to 412 (3.8 to 4.2, 54 to 60)
1,126 to 1,226 (11.5 to 12.5, 164 to 178)
− AUTOMATIC TRANSAXLE (U341E)
S Line pressure too low
S Forward clutch worn
S No. 2 one−way clutch not operating
S Line pressure too low
S Reverse clutch worn
S 1st & reverse brake worn
2
kPa (kgf/cm , psi)
978
Possible cause
R position kPa (kgf/cm
553 to 623 (5.6 to 6.4, 80 to 90)
1,764 to 1,964 (18.0 to 20.0, 256 to 284)
2
, psi)