Mazda 2002 6 Workshop Manual page 535

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NO.14 ENGINE FLARES UP OR SLIPS WHEN UPSHIFTING OR DOWNSHIFTING
14 Engine flares up or slips when upshifting or downshifting
• When accelerator pedal is depressed for driveway, engine speed increases but vehicle speed increases
DESCRIPTION slowly.
• When accelerator pedal is depressed while driving, engine speed increases but vehicle does not.
• There is clutch slip because clutch is stuck or line pressure is low.
1. Clutch stuck, slippage (forward clutch, 3–4 clutch, 2–4 brake band, one-way clutch)
POSSIBLE
2. Signal malfunction
CAUSE
3. Poor operation of mechanical pressure
Note
• Before following troubleshooting steps, make sure that Automatic Transaxle On-Board Diagnostic
Diagnostic procedure
STEP
1 Is shift point okay?
2 Check the value at the following PID using the
WDS or equivalent. (See
INSPECTION.)
• TP
Is PID value okay?
3 Disconnect PCM. Is resistance between ground
terminal at PCM connector and body ground
less than 5.0 ohms?
4 Check LPS PID value.
Is LPS PID value okay?
(See F–45 PCM
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NO.15 ENGINE FLARES UP OR SLIPS WHEN ACCELERATING VEHICLE
15 Engine flares up or slips when accelerating vehicle
• Engine flares up when accelerator pedal is depressed for upshifting.
DESCRIPTION
• Engine flares up suddenly when accelerator pedal is depressed for downshifting.
• The malfunction is basically the same as for No.14 "Engine flares up or slips when upshifting or
POSSIBLE
CAUSE downshifting". If conditions for No.14 worsen, the malfunction will develop to No.15.
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K–124
TROUBLESHOOTING
• Line pressure low
• Shift solenoid D malfunction
• Shift solenoid E malfunction
• Shift solenoid A malfunction
• Shift solenoid B malfunction
• Shift solenoid C malfunction
• Pressure control solenoid malfunction
• Body GND malfunction
• Accelerator cable misadjustment
• Control valve body malfunction
• Vehicle speed sensor malfunction
• Sensor GND malfunction
• TP sensor malfunction or mis-adjustment
• Input/turbine speed sensor malfunction
• Selector lever position disparity
• TR switch position disparity
and Automatic Transaxle Basic Inspection are conducted.
INSPECTION
F–45 PCM
INSPECTION.)
Yes Go to next step.
No Go to No.9 "ABNORMAL SHIFTING"
Yes Go to next step.
No Repair or replace any defective parts.
Yes Go to next step.
No Repair open ground circuit. Reconnect PCM.
Yes Overhaul control valve body and repair or replace any
defective parts. If problem remains, overhaul transaxle and
repair or replace any defective parts. (See ATX workshop
manual (FN4A-EL) [1623-10-98E].) (See ATX workshop
manual supplement (FN4A-EL) [1746-1*-02C].)
No Repair or replace any defective parts.
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ACTION
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