Mazda 626 Station Wagon, Руководство по ремонту

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ON-BOARD DIAGNOSTIC
ON-BOARD DIAGNOSTIC
FOREWORD
• When the customer reports a vehicle malfunction, check the diagnostic trouble code (DTC), then diagnose the
malfunction according to the following flowchart.
— If the DTC exists, diagnose the applicable DTC inspection. (See F1 -37 DTC TABLE.)
— If the DTC does not exist and the MIL does not illuminate or flash, diagnose the applicable symptom
troubleshooting. (See F1-99 TROUBLESHOOTING ITEM TABLE)
*: Generator Warning Light, Security Light
OUTLINE
Except for GF4A-EL Models
Read/clear diagnostic test results
• This retrieves all stored DTCs in the PCM and
clears the DTC.
Parameter identification (PID) access
• The PID mode allows access to certain data
values, analog and digital inputs and outputs,
calculated values and system status information.
Since PID values for output devices are PCM
internal data values, perform the Simulation Test
to identify which output devices are
malfunctioning.
Simulation test
• Output devices can be turned on and off by
sending simulation command signals from the
NGS tester to the PCM. The “Idling Test” and
“Ignition ON Test” are available in this test. These
tests will verify the PCM status, output devices,
and related circuit wiring harnesses.
Diagnostic support procedure
• This tests the ability of the powertrain control
system to detect a change in certain input devices
by following the instructions on the NGS tester.
There are two options: ALL TEST and SINGLE
TEST. ALL TEST takes you through aH the
diagnostic support tests. SINGLE TEST enables
you to perform specific tests that relate to the
particular diagnosis that you are conducting. This
test MUST follow the instructions on the NGS
tester. If not, a
"TEST CONDITIONS NOT
CORRECT’ message will appear, or else the test
result will be FAULTY
ON-BOARD DIAGNOSTIC TEST
Except for GF4A-EL Models
NGS tester hook-up procedure
Note
• Make sure the ignition key is OFF.
F1-30