Mazda MX-6 1998, Workshop Manual

Page: 778 / 1282

TROUBLESHOOTING [GF4A-EL]
14 ENGINE FLARES UP OR SLIPS WHEN UPSHIFTING OR DOWNSHIFTING
TROUBLESHOOTING HINTS
There is clutch slip because the clutch is stuck or the line pressure is low.
© Clutch stuck, slippage (forward clutch, 3 -4 clutch, 2 -4 brake band, one-way clutch 1, one-way clutch 2)
• Line pressure low
• Malfunction of throttle position sensor
• Malfunction of vehicle speedometer sensor
• Malfunction of input/turbine speed sensor
• Malfunction of sensor ground
• Malfunction of shift solenoid A (Sticking)
• Malfunction of shift solenoid B (Sticking)
• Malfunction of shift solenoid C (Sticking)
• Malfunction of pressure control solenoid valve (Sticking)
• Malfunction of body ground (Sticking)
• Malfunction of control valve body (Poor operation, sticking)
© Poor operating of mechanical pressure
• Selector lever position disparity
• Transaxle range switch position disparity
STEP INSPECTION
ACTION
1 Is shift point okay? Yes Go to next step
No Go to No.9 “ABNORMAL SHIFT”
2
Check the voltage at the following terminal of
the powertrain control module
c r 0 1 -40B POWERTRAIN CONTROL
Yes Go to next step
MODULE (PCM) INSPECTION [KL]
• Pressure control solenoid signal
Is terminal voltage okay?
No Repair or replace any defective parts
3 Check duty of pressure control solenoid
tr 0 5 -1 7B SOLENOID VALVES
INSPECTION [GF4A-EL], Pressure
Control Solenoid Output Duty Inspection
Is duty okay?
Yes Overhaul control valve body and repair or replace any
defective parts
tr ATX workshop manual
If problem remains, overhaul transaxle and repair or
replace any defective parts
v ATX workshop manual
No Check the voltage at the following terminals of the
powertrian control module
zr 01-40B POWERTRAIN CONTROL MODULE (PCM)
INSPECTION [KL]
• Throttle position sensor signal
• Ground (Engine, body)
Repair or replace any defective parts
15 ENGINE FLARES UP OR SLIPS WHEN ACCELERATING VEHICLE
TROUBLESHOOTING HINTS
The malfunction is basically the same as for No.14 “ENGINE FLARES UP OR SLIP WHEN UPSHIFTING OR
DOWNSHIFTING”. If conditions for No.14 worsen, the malfunction will develop into No.15. _______________
0 5 -0 1 B -3 2