Mazda MX-6 1998, Workshop Manual

Page: 809 / 1282

AUTOMATIC TRANSAXLE [LA4A-EL]
Time lag
N D range ... below approx. 1.0 second
N -» R position ... below approx. 1.0 second
Evaluation of time lag test
Condition Possible Cause
N -» D shift
Above specification
Insufficient line pressure
Forward clutch slipping
Forward one-way clutch slippage
Low one-way clutch slippage
Below specification
Forward accumulator not operating properly
Excessive line pressure
N -» R shift
Above specification
Insufficient line pressure
Low/reverse clutch slippage
Reverse clutch slippage
Below specification
Low/reverse accumulator not operating properly
Excessive line pressure
6. Turn off the engine.
Torque Converter Clutch Operation Test
This test verifies that the torque converter clutch control system and the torque converter are operating properly.
Warning
• Doing this test by yourself can be dangerous. You could have an accident if you are looking at
the manual or devices while driving, which may resulting in death or injury. Always have another
person in the vehicle with you to read the manual or devices while you drive.
Note
• Perform the OBD test. Check for a code P0741 or P0743. Refer to the appropriate pinpoint test or
procedure for diagnosis.
1. Bring the engine to normal operating temperature by driving the vehicle at highway speeds for approximately
15 minutes in D range.
2. After normal operating temperature is reached, maintain a constant vehicle speed of about 80 km/h {50 mph},
and tap the brake pedal with the left foot.
3. Engine rpm should increase when the brake pedal is tapped, and decrease about 5 seconds after the brake
pedal is released. If this does not occur, refer to Torque Converter Operation Concern in 0 5 -0 1 A
AUTOMATIC TRANSAXLE SYMPTOM TROUBLESHOOTING [LA4A-EL].
4. If the vehicle stalls in D range at idle with the vehicle at a stop, move the selector lever to 1 range. If the
vehicle stalls, the cause may be the converter control valve in the oil pump. Service as required. If the vehicle
does not stall in 1 range, refer to Pinpoint Test C1 in 0 5 -0 1 A AUTOMATIC TRANSAXLE ON-BOARD
DIAGNOSIS [LA4A-EL].
0 5 -1 7 A -4