7
MAN #650519:B
Troubleshooting quick tips:
While the GPS-50-2 is operating, the dot in the upper left corner of the display will indicate the status. On steady
indicates it is powered up but not receiving any BIM bus activity. Flashing indicates it is communicating on the BIM bus.
A dot in the upper center indicates that it is receiving a valid GPS signal. A dot in the lower center indicates the
accelerometer is actively correcting the speedometer reading.
When the key is off the dot in the upper left corner will flash very slowly. If the switch on the GPS-50-2 is held, it will flash
rapidly indicating that the key is off.
To see the number of satellites being tracked, signal strength, speed, and heading on the GPS display, press and hold the
switch with the key on. It will toggle between displaying the number of satellites tracked followed by a dash (
10-
), the
signal strength followed by three dashes, current speed in km/h, and the heading in degrees.
Troubleshooting guide.
Problem
Possible cause
Solution
Sensor does not show on
BATTERY terminal is not powered.
Connect to a location that has power at all times.
gauge readout.
ACC PWR terminal is not powered.
Connect to a location that has power with the key on.
GPS will not light up at all.
GND terminal does not have a good
Connect to a different ground location.
ground.
RED wire on BIM-xx-1 adapter
Connect to a location that has power with the key on.
harness is not powered.
BLACK wire on BIM-xx-1 adapter
Connect to a solid vehicle ground location.
harness is not grounded.
Module is damaged.
Return for service. (see instructions)
Sensor does not show on
Interface cable is not connected.
Connect the supplied power/data cable between the BIM unit and
gauge readout.
the gauge control box.
GPS has a steady dot lit
Interface cable is loose.
Make sure both ends of the cable are seated in securely.
On VHX systems, the BIM display
Follow instructions in VHX manual to enable the BIM display screen.
for this channel is disabled.
Another BIM is set with the same
Test module works when connected to control box alone. Change ID’s
channel IDs.
on one of the modules so each module uses unique IDs.
Sensor does not show on
Another BIM is set with the same
Test module works when connected to control box alone. Change ID’s
gauge readout.
channel IDs.
on one of the modules so each module uses unique ID’s.
GPS display is flashing
SPd
,
CL
,
CPS
, or
ALt
(
SPD
– speed,
CL
– clock,
CPS
– compass,
ALT
– altimeter)
Speed always reads 0.
GPS data is out-dated.
If the constant power connection has been disconnected, it may take
GPS has a flashing dot in
5 – 15 minutes for it to get valid data from the satellites.
the upper left corner.
GPS receiver cannot get a signal.
If the car is inside a garage or other structure it may not be able to receive
a signal from the satellites. Move the vehicle to an open area and retest.
Speed always reads 0.
Broken or loose wire connection.
Inspect and reconnect wires.
SPEED terminal is used
Wire connected to the wrong output.
Switch between the #1 and #2 output types and retest.
for connection.
Output calibration is incorrect.
See “Speedometer output setup” in the manual.
Speed reading is incorrect.
Speedometer output is set incorrectly. See “Speedometer output setup” in the manual.
Speedometer is not accurate.
Consult your speedometer manual to determine the calibration steps.
Speed seems to lag or is
Module is not mounted securely and is Mount the module securely using screws or hook and loop tape.
erratic.
sliding around while driving.
The internal acceleration sensor needs Accelerate or decelerate in a straight line to allow the system to calibrate
to learn which direction is forward.
itself.
Cruise control will not
Speed output rate does not match.
Change either the GPS-50-2 or cruise control speed pulse rate so they
engage.
match each other.
Loose wire connection.
Inspect wiring connections.
Cruise speed type is set incorrectly.
Make sure the cruise control is set for an ECM type signal.
Cruise control will not
Speed output rate does not match.
Change either the GPS-50-2 or cruise control speed pulse rate so they
hold a steady speed.
match each other.
Gain control on cruise incorrect.
See cruise control manual to adjust gain or sensitivity.
GPS mounting location causing
Move the GPS-50-2 to a new location to minimize signal reflections.
degraded signal.
Be sure to perform a reset after moving the unit.
Attach an external GPS antenna to the OPTIONAL ANTENNA jack
on the top of the GPS-50-2. The antenna can be secured to the
windshield or rear window for a clear view of the sky.
Speed signal wire is picking up noise.
Isolate the speed signal wire from tachometer or motor wires.