K–8
AUTOMATIC TRANSAXLE
Evaluation of stall test
Time Lag Test
1. Perform mechanical system test preparation. (See K–6 Mechanical System Test Preparation.)
2. Use a stopwatch to measure the time it takes from shifting until shock is felt when shifting the selector lever
from N position to D range (non-HOLD mode). Take three measurements for each test and take the average
from the results using the following formula.
Formula:
Average time lag = (Time 1 + Time 2 + Time 3) / 3
3. Perform the test for the following shifts in the same manner Step 2.
• N position → D range (HOLD mode)
• N position → R position
Time lag
N position → D range ... 0.4—0.7 s
N position → R position ... 0.4—0.7 s
Evaluation of time lag test
End Of Sie
Condition Possible cause
Above specification
In all forward ranges and R
position
Insufficient
line pressure
Worm oil pump
Oil leaking from oil pump, control valve, and/
or transaxle case
Pressure regulator valve sticking
Pressure control solenoid malfunction
Pressure modulator valve sticking
In forward ranges
Forward clutch slippage
One-way clutch 1 slippage
In D ranges One-way clutch 2 slippage
In S ranges 2-4 brake band slippage
In L range and R position Low and reverse brake slippage
In R position
Low and reverse brake slippage
Reverse clutch slipping
Perform road test to determine whether problem is low and
reverse brake or reverse clutch
• Engine braking felt in L range: Reverse clutch
• Engine braking not felt in L range: Low and reverse brake
Below specification
Engine out of tune
One-way clutch slipping within torque converter
Condition Possible Cause
N → D shift
More than specification
Insufficient line pressure
Forward clutch slipping
Oil leaking from forward clutch fluid circuit
Shift solenoid A not operating properly
Less than specification
Forward accumulator not operating properly
Shift solenoid A not operating properly
Excessive line pressure
N → D (HOLD) shift
More than specification
Insufficient line pressure
Forward clutch slipping
Shift solenoid A not operating properly
Less than specification
Forward accumulator not operating properly
Shift solenoid A not operating properly
Excessive line pressure
N → R shift
More than specification
Insufficient line pressure
Low and reverse brake slipping
Reverse clutch slipping
Shift solenoid B not operating properly
Less than specification
Servo apply accumulator not operating properly
Shift solenoid B not operating properly
Excessive line pressure
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