Self-Diagnosis Function - HYOSUNG GV250 EI Service Manual

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 and the "FI" check lamp "
To check the function of the individual EI 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
The "FI" check lamp "
position with the engine stopped as a test of the injection system operation.
The check lamp must go off after three seconds.
MALFUNCTION
"NO"
"YES"
Engine can start
Engine can not
start
A
When one of the signals is not received by ECU, the fail-safe circuit works and injection is not stopped.
In this case, "FI" letters and speedometer are indicated in the LCD panel ① and motorcycle can run.
B
The injection signal is stopped, when the pick-up coil signal, roll over switch signal, NO.1 & NO.2 ignition signals,
NO.1 & NO.2 injector signals, fuel pump relay signal or ignition switch signal is not sent to ECU.
In this case, "FI" letters is indicated in the LCD panel ①. Motorcycle does not run.
"CHE" : The LCD panel ① indicates "CHE" letters 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 "
In this case, the speedometer does not receive any signal from ECU, and the LCD panel ① indicates "CHE"
letters.
If "CHE" letters is indicated, the LCD panel ① does not indicate the trouble code.
The possible cause of this indication is as follows, Engine stop switch is in "
It is necessary to check the wiring harness between ECU and speedometer couplers.
" ② comes on for about three seconds whenever the ignition switch is set to "ON"
LCD (DISPLAY)
INDICATION ① ①
Speedometer
Speedometer
and
"FI" letters
A
"FI" letters
B
②
①
"FI" CHECK LAMP
INDICATION ② ②
-
"FI" check lamp
comes on.
"FI" check lamp comes
on and blinks.
" position. Ignition fuse is burnt.
27
EI SYSTEM DIAGNOSIS 4-1-12
₩ ₩
" ②.
INDICATION
MODE
-
Each 2 sec.
Speedometer or "FI"
letters is indicated.
"FI" letters is indicated
continuously.
" position.