HYOSUNG 2010 ST7, Service Manual

Page: 142 / 298

4-35 EI SYSTEM DIAGNOSIS
4) Turn the ignition switch “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 “OFF” position.
2) Check the TP sensor coupler for loose or poor
contacts.
If OK, then measure the TP sensor input voltage.
3) Disconnect the TP sensor coupler
①
.
DETECTED CONDITION POSSIBLE CAUSE
● TP sensor circuit open or short.
●
TP sensor malfunction.
● ECU malfunction.
☞ ☞
Refer to page 4-24
0122
0123
LCD (DISPLAY) INDICATION “FI” CHECK LAMP INDICATION
[ 0 1 2 2 0 1 2 2 0 1 2 ]
[ 0 1 2 3 0 1 2 3 0 1 ]
①