HYOSUNG Aquila GT250 Ej, Service Manual

Page: 58 / 122

57
EI SYSTEM DIAGNOSIS 4-1-40
3) Disconnect the TP sensor coupler .
4) Turn the ignition switch to the “ON” position.
5) Measure the voltage at the OB wire and ground.
6) If OK, then measure the voltage at the OB wire
and GR wire.
YES
NO
Go to Step 2.
Loose or poor contacts on the
ECU coupler.
Open or short circuit in the OB
wire or GR wire.
TP sensor input
voltage
4.9 ~ 5.1 V
( OB - Ground )
( OB - GR )
Is the input voltage OK?
Tester knob indication : Voltage ( )
“0122” or “0123” TP SENSOR CIRCUIT MALFUNCTION
INSPECTION
Step 1
1) Turn the ignition switch to the “OFF” position.
2) Check the TP sensor coupler for loose or poor
contacts.
If OK, then measure the TP sensor input voltage.
DETECTED CONDITION POSSIBLE CAUSE
TP sensor circuit open or short.
TP sensor malfunction.
ECU malfunction.
Refer to page 46 [4-1-29]
LCD (DISPLAY) INDICATION “FI” CHECK LAMP INDICATION