TM 10-3930-675-20-1
0021 00-4
ENGINE AMBIENT AIR PRESSURE SENSOR AND CIRCUITS TROUBLESHOOTING - CONTINUED
0021 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
Ambient Air Pressure Sensor Circuit -
Continued
7. Place ignition switch to OFF
position
and
disconnect
sensor harness connector
from ECU.
8. Inspect sensor harness and
ECU connector for dirty,
corroded,
bent,
broken,
pushed back, and extended
pins.
Clean and repair connector(s) as
required (WP 0111 00).
9. Check sensor harness and
ECU 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).
10.Place ignition switch in OFF
position
and
disconnect
sensor harness connector
from ECU.
11.Measure resistance from pin
6 of sensor harness connector
to all other pins in the
connector. Resistance should
be greater than 100k ohms.
If engine harness requires
replacement, notify SRA.
>100K OHMS