TM 10-3930-675-24-1
ENGINE AMBIENT AIR PRESSURE SENSOR AND CIRCUITS TROUBLESHOOTING - CONTINUED
0022 00
Table 1. Error Code 1221 - High Voltage Detected at
Ambient Air Pressure Sensor Circuit Troubleshooting Procedures - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Error Code 1221 - High Voltage Detected at 7. Place ignition switch in OFF
Ambient Air Pressure Sensor Circuit - Continued.
position and disconnect
sensor harness connector
from ECU.
8. Inspect sensor harness and Clean and repair connector(s) as
ECU connector for dirty, required (WP 0113 00).
corroded,
bent,
broken,
pushed back, and extended
pins.
9. Check sensor harness and
Remove dirt and moisture from
ECU for dirt or moisture in or
connector. Replace missing or
damaged connector seals (WP
on connector and for missing
0113 00).
or damaged connector seals.
10. Place ignition switch in OFF
position and disconnect
sensor harness connector
from ECU.
11. Measure resistance from pin 6 If engine harness requires
of sensor harness connector to replacement, notify Sustainment
all other pins in the connector. Maintenance.
Resistance should be greater
than 100k Ohms.
>100K Ohms
0022 00-4
