Stack ST8100 - Page 50

Chapter 6. Troubleshooting STACK ST8100 Display System
40 Users Guide
No. Symptom Possible Cause Remedy Notes
6 Display gives a
fixed temperature
reading of 0
° C or
0
° F when engine
temperature is
above 12
° C or 55
° F
A temperature
sensor has failed
Replace sensor Disconnect
sensor and
short its leads
together. If the
reading
changes,
replace the
sensor.
Faulty sensor
connections
Check continuity of
sensor leads for
open circuits.
Check the
wiring harness
for open circuits
(pin E to the red
OT sensor wire,
pin P to the red
WT wire, and
pin H to both
the black OT
and WT sensor
wires)
7 Fixed pressure
reading of 999 PSI
or 99.9 Bar
Pressure sensor
has failed
Replace sensor
Faulty sensor
connections
Check continuity of
sensor leads for
open circuits
Pin D to the red
OP wire, pin R
to the red F
wire and pin H
to both the
black OP and F
sensor wires
8 Fixed pressure
reading of -99
PSI
or -9.9 Bar
Pressure sensor
has failed
Replace sensor Disconnect
sensor. If
reading
changes to 999,
replace sensor
Faulty sensor
connections
Check continuity of
sensor leads for
short circuits
Check the
wiring harness
for short circuit