Case CX130 - Page 113

DIAGNOSTIC - SELECTION
4 - 25
CASE TRAINING CENTER
AUGUST 2000
Fuel
Description of the problem No. 1
- The message is still displayed even after refilling the fuel tank.
1. Main electronic control box
2. Fuel level sender
Resistance between GL and BG
Troubleshooting Cause Action
Starter key switch ON
Measure the
resistance of the fuel
level sender using
maintenance support
CHK4. (Refer to the
table below for the
resistance).
YES
Defective
main
electronic
control box
Change the
main
electronic
control box
NO
Starter key switch OFF
Disconnect the coupler
from the fuel level
sender to measure the
resistance of the
coupler at the fuel level
sender end. (Refer to
the table below for the
resistance).
NO
Defective fuel
level sender
Change or
check the
fuel level
sender
YES
Disconnect the CN24
connector to measure
the resistance between
GL female and the GND
earth. (Refer to the
table below for the
resistance).
NO
Bad
connection on
fuel level
sender
Clean the
connection
terminal
YES
Disconnect connector
CN1 to measure the
resistance between
female GL and the GND
earth. (Refer to the
table below for the
resistance).
NO
Bad
connection on
CN24
Clean CN24
connection
terminal
YES
Defective
main
electronic
control box or
incorrect CN1
connection
Change the
main
electronic
control box
or clean the
CN1
connection
terminal
Note: All the bar graph indicators have disappeared when the circuit is open
Monitor 1. Refill the tank 2345678
Resistance (OHM) 80-75 75-61 61-47 47-37 37-30 30-24 24-19 19-10
1
2