22
Diagnostics, Troubleshooting and Testing
SPN
FMI
DTC Description
DTC Detection Method
Action
894
4
BSD sensor
voltage supply out
of range - Low.
Voltage supply to the radar
sensor is abnormal low
(drops below 9V) for more
than 10 seconds.
With the ignition on, monitor the voltage (Ignition) at
pin 5 of the BSD radar sensor harness connector to
determine if the voltage is between 10 and 16 VDC. If
the voltage is less than 9VDC:
- Inspect the BSD radar sensor circuit harness
connectors, verify that there is no sign of damage or
corrosion.
- Inspect each of the power connections between the
ignition switch and the BSD radar sensor harness
connector to determine where loss of power may be
occurring. Check for any loose connectors.
894
5
LED Short to
Battery.
LED is continuously
monitored to check for a
short to battery.
- Verify the LED indicator lamp wiring circuit
connectors are not loose and show no signs of
damage or corrosion.
- Check LED indicator lamp wiring circuit for short to
voltage from pin 1 of LED harness connector to pin 4
of radar sensor harness connector.
- Inspect LED indicator lamp pigtail for damage or
short to voltage.
894
6
LED Short to
Ground.
LED is continuously
monitored to check for a
short to ground
- Verify the LED indicator lamp wiring circuit
connectors are not loose and show no signs of
damage or corrosion.
- Check LED indicator lamp wiring circuit for short to
ground from pin 1 of LED harness connector to pin 4
of radar sensor harness connector.
- Inspect LED indicator lamp pigtail for damage or
short to ground.
894
7
LED open circuit.
LED is continuously
monitored to check for an
open circuit.
- Verify the LED indicator lamp wiring circuit
connectors are not loose and show no signs of
damage or corrosion.
- Inspect LED indicator lamp pigtail for damage.
- Check LED indicator lamp wiring circuit for continuity
from pin 1 of LED harness connector to pin 4 of radar
sensor harness connector.
- Check LED indicator lamp wiring circuit for continuity
from pin 2 of LED harness connector to ground.
894
8
BSD sensor
temperature out of
range.
If temperature at sensor
is above 185°F or below
-40°F.
Provide cooling or warming to the BSD radar sensor
as needed, cycle the power and retest after the unit
temperature is within range.
If the temperature of the radar sensor is brought
back into range and the DTC persists, a radar sensor
failure is indicated.
