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
Ambient Air Pressure Sensor Circuit - Continued.
USE TEST LEAD
KIT P/N 3822917
4.75-5.25V
cable If voltage is not as specified,
6. Install
breakout
between sensor and sensor proceed with the following steps.
harness connector and place
ignition switch in ON
position. Measure signal
voltage from pin C to pin B of
breakout cable. Voltage
should be as follows:
Altitude (Ft.) vs. Voltage
0
= 3.4 to 4.5V
3K
= 2.8 to 3.8V
6K
= 2.2 to 3.2V
9K
= 1.7 to 2.7V
12K
= 1.2 to 2.2V
0022 00-3