TM 10-3930-675-20-1
0021 00-5
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
12.Place ignition switch in OFF
position
and
disconnect
sensor harness connector
from ECU and disconnect
engine harness from ambient
air pressure sensor.
Clean and repair connector(s) as
required (WP 0111 00).
13.Check for open circuit in
return wire by measuring
resistance from pin 31 of
sensor harness connector to
engine
block
ground.
Resistance should be less than
10 ohms.
a. If resistance is as specified,
replace ambient air pressure
sensor (WP 0093 00).
b. If engine harness requires
replacement, notify SRA.
<10 OHMS
