Page 24 709-RVC NLP Manual
CHAPTER 7 - TROUBLESHOOTING GUIDE
W NOTE: There are no diagnostics for battery voltage.
If a sender or its wiring is not operating properly, the following codes are
shown on the display:
DISPLAY CODE POSSIBLE CAUSE SOLUTION
Open circuit
1. If a sender is unresponsive.
2. There is an open circuit in the wiring so the
sender is not connected.
See “Wiring Diagnostics”
section.
Short circuit
1. A sender is shorted or there is a short in
the wiring.
See “Wiring Diagnostics”
section.
Error
1. Senders have not been programmed
correctly.
2. The sender is sending bad data.
3. There is damaged wiring.
4. There is electrical interference.
Check all the senders
to make sure they are
programmed correctly.
If they are, replace the
sender that is creating
the error.
Stacked senders
1. The display has been programmed for
a single sender where double-stacked
senders have been connected. The display
has not been set to look for two senders
Change the senders or
reprogram the display as
required.
1. The display has been programmed for
stacked senders and the top sender has
been connected.
2. The display has been programmed for
double-stacked senders and one of these
error codes are showing:
• ntP - only the bottom sender is working
and the top one is not.
• nbo - only the top sender is working and
the bottom is not.
Correct the programming
on the sender.
The memory used to store programming for
battery voltage calibration value and tank
sender signal values has failed.
Replace the display.
The only LPG diagnostic code is the open
circuit. If the wiring to the LPG sender is
shorted then the LPG will always show “O”.
LEVEL IN PERCENT
O
P n
LEVEL IN PERCENT
s
h t
LEVEL IN PERCENT
E
r r
LEVEL IN PERCENT
S
t A
LEVEL IN PERCENT
n
t P
No top sender
LEVEL IN PERCENT
n
b o
No bottom sender
LEVEL IN PERCENT
C
A L
Calibration failure
LEVEL IN PERCENT
0
For LPG only
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