Self-Diagnosis Function; User Mode - HYOSUNG AQUILA 650 FI Service Manual

4-1-11 FI SYSTEM DIAGNOSIS

SELF-DIAGNOSIS FUNCTION

The self-diagnosis function is incorporated in the ECU. The function has two modes, "USER MODE" and "DEALER
MODE". The user can only be notified by the LCD(DISPLAY) panel ①
the function of the individual FI system devices, the dealer mode is prepared. In this check, the special tool is
necessary to read the code of the malfunction items.
◉ ◉ USER MODE
MALFUNCTION
"NO"
"YES"
Engine can start
Engine can not
start
*1
When one of the signals is not received by ECU, the fail-safe circuit works and injection is not stopped. In this case,
"FI" and speedometer are indicated in the LCD panel and motorcycle can run.
*2
The injection signal is stopped, when the crankshaft position sensor signal, tip over sensor signal, #1/#2 ignition
signals, #1/#2 injector signals, fuel pump relay signal or ignition switch signal is not sent to ECU. In this case, "FI" is
indicated in the LCD panel. Motorcycle does not run.
"CHEC" : The LCD panel indicates "CHE" when no communication signal from the ECU is received for 3 seconds.
For example, The ignition switch is turned "ON" position, and the engine stop switch is turned "OFF" position. In this
case, the speedometer does not receive any signal from ECU, and the panel indicates "CHE".
If "CHE" is indicated, the LCD does not indicate the trouble code. It is necessary to check the wiring harness
between ECU and speedometer couplers.
The possible cause of this indication is as follows, Engine stop switch is in "OFF" position. Ignition fuse is burnt.
②
LCD (DISPLAY)
INDICATION ① ①
Speedometer
Speedometer
and
"FI" letters
*1
"FI" letters
*2
①
and the "FI" check lamp "
"FI" CHECK LAMP
INDICATION ② ②
-
"FI" check lamp
comes on.
"FI" check lamp comes
on and blinks.
22
" ② . To check
INDICATION
MODE
-
Each 2 sec.
Speedometer or "FI"
is indicated.
"FI" is indicated
continuously.
②
①