TROUBLESHOOTING [LA4A-EL]
18
SHIFT CONCERNS: SOFT/SLIPPING 3 -4 SHIFT
[TROUBLESHOOTING HINTS]
• Powertrain control system
• Direct clutch component
• Control valve body
• Transaxle case
• 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
c r 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
Control valve body
• Do any of the following problems exist?
• Bolts are not torqued to specification
• Gasket leaks
• Line modulator valve, 2/4 accumulator
valve plug and seal (also soft 1 2 shift), are
stuck, damaged, misassembled
• Pressure tap plate/gasket leaks
• Hydraulic passages are damaged
• Separator plates are damaged, or orifice is
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 worn, damaged, or
misassembled
• Piston seals or piston bore is damaged, or
missing
• Servo cover or seal is damaged
• Servo rod or rod bore is damaged
• Springs are damaged
Yes
Service as required
No
Go to next step
4
Direct clutch component
Note
• May also have third gear slip
• Do any of the following problems exist?
• Seals are damaged, or missing
• Piston are 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
Transaxle case
• Do any of the following problems exist?
• Band anchor is damaged
• Leakage in the servo apply and servo
release
Yes
Service as required
No
The problem is not in the automatic transaxle
Go to engine symptom troubleshooting
zr
0 1 -0 1 A ENGINE SYMPTOM TROUBLESHOOTING
[FS]
0 5 -0 1 A -5 5
Summary of Contents for MX-6 1998
Page 1: ......
Page 501: ...STARTING SYSTEM 3 If not as specified replace the starter interlock switch 01 19 3...
Page 803: ...MANUAL TRANSAXLE W 6 U 5 1 5 W A C 05 15 7...
Page 934: ...CONTROL SYSTEM CONTROL SYSTEM STRUCTURAL VIEW W6U740WA0 07 40 2...
Page 983: ...SERVICE TOOLS 08 60 SERVICE TOOLS 08 RESTRAINTS S S T 08 60 1 08 RESTRAINTS SST 08 60 1...