How To Retrieve A Dtc; General Troubleshooting Information - Honda Civic 2002-2003 Service Manual

Heating and Air Conditioning
General Troubleshooting Information
How to Retrieve a
Ole
The heater control panel has a self-diagnosis function. To run the self-diagnosis function, do the following:
1. Turn the fan switch OFF.
2. Press and hold the recirculation control switch and the rear window defogger switch down.
3. Turn the ignition switch ON (II).
4. Release both switches. The recirculation indicator and the rear window defogger indicator come on. The
recirculation indicator goes off 3 seconds later and the NC indicator comes on, then the self-diagnosis will begin.
About 10 seconds later, the self-diagnosis will finish and the NC indicator goes off .
• If any trouble is found, the recirculation indicator blinks the diagnostic trouble code (DTC) to indicate a faulty
circuit or component.
If the system is OK, the recirculation indicator stays off.
@
FANSWITCH
~
~
RECIRCULATION
INDICATOR
' "
~e
Example of OTC indication Pattern (OTC 7)
Recirculation
indicator
comes on
Recirculation ------- - ,
indicator
goes off :..
~
I
3
sec
Resetting the Self-diagnosis Function
RECIRCULATION
CONTROL SWITCH
~~5ec
~:.--
, 0.3 sec
AIC INDICATOR
/
REAR WINDOW
?GER INDICATOR
~~~
REAR WINDOW
DEFOGGER SWITCH
DTC7
~
_ _ A _ _ _
(
'..
.'
1.5
sec:
-
Turn the ignition switch OFF to cancel the self-diagnosis function. After completing repair work, run the self-diagnosis
function again to make sure
that there
are no other malfunctions.
21-8
•