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