Mazda MX-6 1998, Руководство по ремонту

Страница: 731 / 1282

TROUBLESHOOTING [LA4A-EL]
19 SHIFT CONCERNS: SOFT/SLIPPING 4 -3 SHIFT (AUTOMATIC)
[TROUBLESHOOTING HINTS]
• Powertrain control system • Direct clutch component
• Control valve body • Forward/coasting clutch component
• 2/4 band and servo component • Transaxle case
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
• Vehicle speedometer sensor (VSS)
• Mass air flow (MAF) sensor
• Throttle position (TP) sensor
tr 0 5 -1 7A ELECTRICAL SYSTEM
COMPONENT [LA4A-EL]
Yes Run OBD test
Perform pinpoint tests “E”
p - 0 5 -0 1 A AUTOMATIC TRANSAXLE ON-BOARD
DIAGNOSIS [LA4A-EL], Pinpoint Test
No
Go to next step
2 Control valve body
• Do any of the following problems exist?
• Bolts are not torqued to specification
• Gasket leaks
• Servo release shutter valve, main regulator
valve are stuck, damaged, or
misassembled
• Hydraulic passages are damaged
• Pressure tap plate/gasket leaks, or
damaged
• Separator plates are damaged, or blocked
Yes Service as required
No
Go to next step
3 2/4 band and servo component
• Do any of the following problems exist?
• 2/4 band and/or reverse clutch drum
component are damaged, worn, or
misassembled
• Servo return spring is broken
• Servo rod is damaged
• Piston seal is damaged
Yes
Service as required
No Go to next step
4 Direct clutch component
• Do any of the following problems exist?
• Seals are damaged, or missing
• Piston is damaged
• Check ball is damaged, missing, or leaking
• Return spring is damaged
• Friction elements are damaged
Yes Service as required
No
Go to next step
5 Forward/coasting clutch component
• Do any of the following problems exist?
• Seals are damaged, or missing
• Piston is damaged
• Friction elements are worn, or damaged
• Check ball is not functioning
• Forward clutch piston and return spring are
damaged
Yes Service as required
No Go to next step
6 Transaxle case
• Do any of the following problems exists?
• Porosity/cross leaks in servo apply, servo
release, direct clutch circuits
Yes Service as required
No
The problem is not in the automatic transaxle
Go to engine symptom troubleshooting
c r 01-01A ENGINE SYMPTOM TROUBLESHOOTING
[FS]
0 5 -0 1 A -5 6