Mazda 1990 323 Workshop Manual Supplement page 196

K2
TROUBLESHOOTING GUIDE
TROUBLESHOOTING GUIDE
GENERAL NOTES
A problem with the EC-AT may be caused by the engine, the EC-AT powertrain, the hydraulic control sys-
tem, or the electronic control system.
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When troubleshooting, therefore, begin with those points which can be inspected quickly and easily. The
recommended troubleshooting sequence is described below.
03UOKX-011
03UOK2-01
03UOK2-02
03UOK2-021
I I
Step 1: Self-diagnosis Function
Check for malfunction code(s) memorized in the EC-AT con-
trol unit with the EC-AT Tester. (Refer to page K2-104.)
Note
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Malfunction code(s) can also be checked for by the
flashing sequence of the HOLD indicator lamp.
(Refer to page K2-108.)
Step 2: Electric Signal Inspection
Check the signals to/from the EC-AT control unit with the EC-
AT Tester. (Refer to page K2-144.)
Note
l
Signals can also be checked by checking the EC-
AT control unit terminal voltages with a voltmeter.
(Refer to page K2-115.)
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Step 3: Mechanical System Test
Check the engine stall speed, time lag, line pressure, and throt-
tle pressure. (Refer to page K2-119.)
Step 4: Road Test
Note
l
For correct testing, vehicle speed, engine speed,
throttle opening (throttle sensor voltage), and gear
position should be checked with the EC-AT Tester.
Check the shift point, shift schedule, and shift shock.
(Refer to page K2-127.)
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