'61HN252' by American Honda Motor Co. - Page 486 of 540
http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2...
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3/9/2008 11:27 PM
[2005-2008] [TRX500 FA/FGA]
HONDAMATIC
BEFORE STARTING
TROUBLESHOOTING
SELF-DIAGNOSTIC FUNCTION
OUTLINE
The engine control module (ECM) that controls the
Hondamatic system has a self-diagnostic function to
constantly monitor the system. The ECM checks the
condition of the Hondamatic system by detecting
the signals from each sensor, switch and control
motor when the ignition switch is ON and during
driving.
· When the ECM detects a problem, it indicates the
GEAR POSITION INDICATOR
problem by blinking "--" at the gear position indi-
cator.
Note how many times indicator blinking, deter-
mine the detection item
(page 24-11)
and per-
form the troubleshooting
(page 24-12).
· Only one current problem code will be indicated
even if two or more problems occur.
· Once the ECM detects a problem, it stores the
problem code in the erasable memory. It can be
indicated as freeze code by retrieval of problem
code
(page 24-9).
· The shift function can be reset by turning the
ignition switch OFF and ON, but the shift control
stops when the ECM detects the problem again.
· After performing troubleshooting (including ini-
tial setting;
24-6),
erase the problem code(s) and
test-drive the vehicle to be sure that the prob-
lem(s) has/have been repaired.
1 sec.
1 sec.
3 sec.
"--"ON
OFF
Pattern
repeated
One Blink
Current problem code
(Example: Blinking 3
times = Problem code 3)
FAIL-SAFE FUNCTION
The ECM also has the fail-safe function to secure the
vehicle function.
When a problem occurs and the ECM detects the
problem in the Hondamatic system, the ECM stops
the automatic transmission shifting function and
control defaults to fail-safe mode so that the vehicle
can be still driven.
24-8