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General Troubleshooting Information
Intermittent Failures
The term "intermittent failure" means a system may
have had a failure, but it checks OK now. If the
Malfunction Indicator Lamp (MILian the dash does not
come on, check for poor connections or loose terminals
at all connectors related to the circuit that you are
troubleshooting.
Opens and Shorts
"Open" and "Short" are common electrical terms. An
open is a break in a wire or at a connection. A short is
an accidental connection of a wire to ground or to
another wire. In simple electronics, this usually means
something won't work at all. With complex electronics
(such as ECMsl this can sometimes mean something
works, but not the way it's supposed to.
How to Use the PGM Tester or a Scan Tool
If the MIL (Malfunction Indicator Lampl has come on
1. Start the engine and check the MIL (AI.
NOTE: If the ignition switch is turned ON (II). and
the engine is not started, the MIL will stay on for
15-20 seconds (see page 11-461.
2. If the MIL stays on, connect the Honda PGM Tester
(Alar an OBD II scan tool to the Data Link
Connector (DLCI IBI located under the driver's side
of the dashboard.
A
B
3. Turn the ignition switch ON (III.
4. Check the Diagnostic Trouble Code (DTCI and note
it. Also check the freeze data. Refer to the DTC
Troubleshooting Index, and begin the appropriate
troubleshooting procedure.
5. If you do not find any DTCs, go to MIL circuit
troubleshooting (see page 11-971.
NOTE:
• Freeze data indicates the engine conditions when the
first malfunction, misfire, or fuel trim malfunction
was detected .
• The scan tool and the Honda PGM Tester can read the
DTe, freeze data, current data, and other Engine
Control Module (ECMI data.
For specific operations, refer to the user's manual
that came with the scan tool or Honda PGM Tester.
If the MIL did not stay
If the MIL did not come on but there is a driveability
problem, refer to the Symptom Troubleshooting Index
in this section.
If you can't duplicate the DTC
Some of the troubleshooting in this section requires
you to reset the ECM and try to duplicate the DTC. If the
problem is intermittent and you can't duplicate the code,
do not continue through the procedure. To do so will
only result in confusion and, possibly, a needlessly
replaced ECM.
(cont'dl
11-3
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Table of Contents
Troubleshooting
