TROUBLESHOOTING [LA4A-EL]
14
SHIFT CONCERNS: NO 2 -3 SHIFT
[TROUBLESHOOTING HINTS]
• Powertrain control system
• Direct clutch component
• Improper pressure
• 2/4 servo
• Control valve body
• Transaxle case
• Oil pump
STEP
INSPECTION
ACTION
1
Powertrain control system
• Do any of the following problems exist?
• Electrical input/output
• Vehicle wiring harness
• PCM
• Shift solenoid No.1 (SS1), Shift solenoid
No.2 (SS2)
• Transaxle range (TR) switch
a-
0 5 -1 7A ELECTRICAL SYSTEM
COMPONENT [LA4A-EL]
Yes
Run OBD test
Perform pinpoint tests “A and D”
c r 0 5 -0 1 A AUTOMATIC TRANSAXLE ON-BOARD
DIAGNOSIS [LA4A-EL], Pinpoint Test
No
Go to next step
2
Improper pressure
• Do any of the following problems exist?
• High line pressure
• Low line pressure
o - 0 5 -1 7A MECHANICAL SYSTEM TEST
[LA4A-EL], Line Pressur Test
Yes
Go to next step
No
Go to step 5
3
Control valve body
• Do any of the following problems exist?
• Bolts are not torque to specification
• Gasket leaks
• 2 -3 shift valve (also no fourth), main
regulator valve are stuck, damaged, or
misassembled
• SS1, SS2 malfunction (also no fourth)
• Separator plates are damaged
• Pressure tap plate/gasket leaks
• Hydraulic passages are damaged
Yes
Service as required
No
Go to next step
4
Oil pump
• Do any of the following problems exist?
• Bolts are not torqued to spec
• Gaskets are damaged
• Porosity/cross leaks
• Pump support seal rings, #4 and #5, are
damaged
Yes
Service as required
No
Go to next step
5
Direct clutch component
• Do any of the following problems exist?
• Seals or piston is damaged
• Piston bore is damaged
• Friction is severely damaged, worn
• Ball check is not seating properly
• Return spring component is damaged
• Cylinder bore/splines is damaged
• Shell/hub are damaged
Yes
Service as required
No
Go to next step
6
2/4 servo
• Do any of the following problems exist?
• Piston or piston bore is damaged
• Rod bore or rod is damaged, or leaking
Yes
Service as required
No
Go to next step
7
Transaxle case
• Do any of the following problems exist?
• Leakage in the servo apply, servo release
or direct clutch circuits
Yes
Service or replace case as required
No
The problem is not in the automatic transaxle
Go to engine symptom troubleshooting
c r 0 1 -0 1 A ENGINE SYMPTOM TROUBLESHOOTING
[FS]
0 5 -0 1 A -51
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...