Mazda 1990 323 Workshop Manual Supplement page 248

K2
TROUBLESHOOTING GUIDE
15 EXCESSIVE SHIFT SHOCK WHEN UPSHIFTING AND DOWNSHIFTING
[TROUBLESHOOTING HINTS]
3 ATF level low
@ Powertrain slippage (Coasting clutch, 3-4 clutch, or 2-4
3 Throttle cable misadjusted
brake band)
3 2-4 brake band (band servo) misadjusted @ Control valve stuck (Pressure regulator valve, throttle
3 Accumulator malfunction (1-2 accumulator or 2-3 ac- valve, or throttle modulator valve)
cumulator)
@ Hydraulic circuit clogged or leaking (Coasting clutch,
3 Shift solenoid valves stuck (l-2, 2-3, or 3-4) 3-4 clutch, or 2-4 brake band)
TEP INSPECTION
ACTION
1 Check if ATF level is OK
Yes Go to next step
w page K2-134
Level:
Between notches on HOT side of level
gauge at 65% (149°F)
HOT RANGE
No
Add ATF to specified level w page K2-134
2 Check if ATF condition is OK Yes Go to next step
w page K2-134
@ Clear pink: Normal condition
@ Dark or black (with friction material): Worn
powertrain components
@ Milky pink: Water contamination
@ Light to dark brown (Oxidation): Overheated
or old fluid
No No.2 condition
Overhaul transaxle and repair or
replace parts as necessary w page K2-134
No.3 or No.4 condition
Replace ATF
3 Check if "00" is displayed on EC-AT Tester with Yes
Go to next step
ignition switch ON
W page K2-106 No
Malfunction Code No. displayed
Check for cause (Refer to specified
check sequence)
w page K2-108
No Code No. displayed
Check main relay and voltage of termi-
nals 2Q and 2s of EC-AT control unit
Voltage:
Approx. 12V (Ignition switch ON)
"88" flashes
Check wiring between IC terminal of
EC-AT control unit and diagnosis con-
nector
+ If OK, replace EC-AT control unit
L3 If not OK, repair wiring
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K2-72