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General Troubleshooting Information
How to Check for DTCs with the Honda
Diagnostic System/Scan Tool
When the powertrain control module (PCM) senses an
abnormality in the input or output systems, the D
indicator (A) in the gauge assembly (B) will usually
blink.
When the data link connector (DLC) (A) (located under
the steering column lower cover) is connected to the
Scan Tool or Honda diagnostic system (HDS), it will
indicate the diagnostic trouble code (DTC) when the
ignition switch is turned ON (II).
A
B
A
If the D indicator or malfunction indicator lamp (MIL)
has been reported on, or if a driveability problem is
suspected, follow this procedure:
1. Connect the Scan Tool (conforming to SAE J1978)
or HDS to the DLC. (See the Scan Tool or HDS user's
manual for specific instructions.)
2. Turn the ignition switch ON (II), select A/T system
and observe the DTC in the DTCs MENU or the
tester screen.
3. Record all fuel and emissions DTCs, A/T DTCs, and
freeze data.
4. If there is a fuel and emissions DTC, first check the
fuel and emissions system as indicated by the DTC
(except for DTC P0700, DTC P0700 means there is
one or more A/T DTCs, and no problems were
detected in the fuel and emissions circuit of the
PCM).
5. Clear the DTC and data.
NOTE: You can also reset the memory by removing
the No. 13 fuse in the passenger's under-dash fuse/
relay box for more than 10 seconds. If you do, you
need to do the following:
• Get the customer's radio and navigation (if
equipped) anti-theft code, and write down the
radio and navigation presets.
• Enter the radio and navigation (if equipped) anti-
theft code, reset the preset stations, and set the
clock.
• Do the idle learn procedure (see page 11-202).
6. Drive the vehicle for several minutes under the
same conditions as those indicated by the freeze
data, and then recheck for a DTC. If the A/T DTC
returns, go to the DTC troubleshooting Index. If the
DTC does not return, there was an intermittent
problem within the circuit. Make sure all pins and
terminals in the circuit are tight.
(cont'd)
14-247
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