Mazda MX-6 1998, Workshop Manual

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TROUBLESHOOTING [LA4A-EL]
STEP INSPECTION ACTION
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
• Turbine shaft speed (TSS) sensor
• Throttle position (TP) sensor
Vehicle speedometer sensor (VSS)
Mass air flow (MAF) sensor
TCC solenoid
Transaxle range (TR) switch
3 -2 timing/coasting clutch solenoid
(3-2T/CCS)
d
* 0 5 -1 7A ELECTRICAL SYSTEM
COMPONENT [LA4A-EL]_____________
Yes Run OBD Tests
Perform pinpoint tests “BA, BB, BC, BD, BE, BF, C, D, E, F
and G”
c r 0 5 -0 1 A AUTOMATIC TRANSAXLE ON-BOARD
DIAGNOSIS [LA4A-EL], Pinpoint Test
No Go to next step
Joint shafts
• Do any of the following problems exist?
• Damaged
• Loose
• Splines damaged
o - 0 5 -1 7A AUTOMATIC TRANSAXLE
REMOVAL/INSTALLATION [LA4A-EL]
Yes Service as required
No Go to next step
Engine mounts
• Do any of the following problems exist?
• Damaged
• Loose
• Missing
cr 0 5 -1 7A AUTOMATIC TRANSAXLE
REMOVAL/INSTALLATION [LA4A-EL]
Yes Service as required
No Go to next step
Improper pressure
• Is there high line pressure?
t r 0 5 -1 7A MECHANICAL SYSTEM TEST
[LA4A-EL], Line Pressure Test
Yes
Check the line pressure
Service as required
If pressures are okay and a specific shift is harsh, refer to
the following chart:
Shift
Harsh
1-2 22
2 -3 23
3 -4
24
4 -3 25
3 -2 26
2-1
—
W6U501WAH
No Go to next step
C o n tr o l v a lv e b o d y
Yes
Do any of the following problems exist?
Bolts are not torqued to specification
Gaskets are damaged
Main regulator valve, by-pass valve, line
modulator valve are stuck, damaged, or
misassembled springs are tangled,
missing, or damaged
Electrical pressure control (EPC) solenoid
is stuck or damaged
Hydraulic passages are damaged
Separator plate is damaged or blocked
Service as required
No Go to next step
0 5 -0 1 A -4 7