TM 10-3930-675-20-1
0021 00-6
ENGINE AMBIENT AIR PRESSURE SENSOR AND CIRCUITS TROUBLESHOOTING - CONTINUED
0021 00
Table 2. Error Code 1222 - Low Voltage Detected at Ambient Air Pressure Sensor Circuit
Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Error Code 1222 - Low Voltage Detected at
Ambient Air Pressure Sensor Circuit
1. Ensure that ignition switch is
in
OFF
position
and
disconnect engine harness
from ambient air pressure
sensor.
2. Inspect ambient air pressure
sensor and sensor harness
connectors
for
dirty,
corroded,
bent,
broken,
pushed back, and extended
pins.
Clean and repair connector(s) as
required (WP 0111 00).
3. Check ambient air pressure
sensor and sensor harness for
dirt or moisture in or on
connector and for missing or
damaged connector seals.
Remove dirt and moisture from
connector. Replace missing or
damaged connector seals (WP
0111 00).
4. Install
breakout
cable
between sensor and sensor
harness
connector.
Place
ignition switch to ON and
measure supply voltage from
pin A to pin B of breakout
cable. Voltage should be
4.75-5.25V.
If voltage is not as specified,
proceed with the following
steps.
4.75-5.25V
