Mazda MX-6 1998, Workshop Manual, Page: 733 / 1282

TROUBLESHOOTING [LA4A-EL]
21 SHIFT CONCERNS: SOFT/SLIPPING 2-1 SHIFT (AUTOMATIC OR KICKDOWN)
[TROUBLESHOOTING HINTS]
• Powertrain control system • Forward clutch component
• Oil pump • Low one-way clutch (OWC) component
• 2/4 band and servo component
STEP INSPECTION
ACTION
1 Powertrain control system
• Are there any problems with the following?
• Electrical input/output
• Vehicle wiring harness
• PCM
• Electrical pressure control (EPC) solenoid
• Transaxle fluid temperature (TFT) sensor
• Throttle position (TP) sensor
• Mass air flow (MAF) sensor
o - 0 5 -1 7A ELECTRICAL SYSTEM
COMPONENT [LA4A-EL]
Yes Run OBD test
Perform pinpoint tests “BA, BB, BC, BD, BE, BF and E”
tr 0 5 -0 1 A AUTOMATIC TRANSAXLE ON-BOARD
DIAGNOSIS [LA4A-EL], Pinpoint Test
No Go to next step
2
Oil pump
• Do any of the following problems exist?
• Gaskets are damaged
• Porosity/cross leaks
• Pump support seals #3 and 4 are leaking,
misassembled, or damaged
Yes Service as required
No Go to next step
3
2/4 band and servo component
• Do any of the following problems exist?
• Piston is damaged
• Return spring is damaged
Yes Service as required
No Go to next step
4
Forward clutch component
• Do any of the following problems exist?
• Piston or seals are damaged
• Friction elements are damaged
Yes Service as required
No Go to next step
5 Low OWC component
• Is the low OWC damaged or not holding?
Yes Service as required
No The problem is not in the automatic transaxle
Go to engine symptom troubleshooting
tr
0 1 -0 1 A ENGINE SYMPTOM TROUBLESHOOTING
[FS]
0 5 -0 1 A -5 8