TROUBLESHOOTING [LA4A-EL]
26
SHIFT CONCERNS: HARSH 3 -2 SHIFT (AUTOMATIC)
[TROUBLESHOOTING HINTS]
• Powertrain control system
• Direct clutch component
« Control valve body
• 2/4 band and servo component
• Oil pump
• 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
• Transaxle range (TR) switch
• Vehicle speedometer sensor (VSS)
• 3 -2 timing/coasting clutch solenoid
(3-2T/CCS)
• Transaxle fluid temperature (TFT) sensor
• Mass air flow (MAF) sensor
• Throttle position (TP) sensor
• Turbine shaft speed (TSS) sensor
• TCC solenoid
or
0 5 -1 7A ELECTRICAL SYSTEM
COMPONENT [LA4A-EL]
Yes
Run OBD test
Perform pinpoint tests “BA, BB, BC, BD, BE, BF, C, D, E,
F, and G”
d
- 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 is damaged
• 3 -2 timing valve, are solenoid regulator
valve, 3 -2 control valve are stuck,
damaged, misassembled
• Hydraulic passages are damaged
• Separator plates are damaged, or blocked
• 3-2T/C C S solenoid malfunction
Yes
Service as required
No
Go to next step
3
Oil pump
• Do any of the following problems exist?
• Bolts are not torqued to specification
• Gaskets are damaged
• Porosity/cross leaks
• Pump support seal rings are damaged, or
misassembled
Yes
Service as required
No
Go to next step
4
Direct clutch component
• Do any of the following problems exist?
• Return spring are damaged, broken
• Friction elements are damaged, worn
• Check ball is not exhausting
• Servo rod is bent, or damaged
Yes
Service as required
No
Go to next step
5
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 piston is damaged
• Servo return and cushion springs are
damaged, or misassembled
• Springs damaged, misassembled
Yes
Service as required
No
Go to next step
6
Transaxle case
• Do any of the following problems exist?
• Band anchor is damaged
• Leaks
• Servo rod bore is damaged
Yes
Service as required
No
The problem is not in the automatic transaxle
Go to engine symptom troubleshooting
0
- 0 1 -0 1 A ENGINE SYMPTOM TROUBLESHOOTING
[FS]
0 5 -0 1 A -6 3
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...