TM 10-3930-675-20-10021 00-4ENGINE AMBIENT AIR PRESSURE SENSOR AND CIRCUITS TROUBLESHOOTING - CONTINUED0021 00Table 1. Error Code 1221 - High Voltage Detected at Ambient Air Pressure Sensor CircuitTroubleshooting Procedures - Continued.MALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTIONError Code 1221 - High Voltage Detected atAmbient Air Pressure Sensor Circuit -Continued7. Place ignition switch to OFFposition and disconnectsensor harness connectorfrom ECU.8. Inspect sensor harness andECU connector for dirty,corroded, bent, broken,pushed back, and extendedpins.Clean and repair connector(s) asrequired (WP 0111 00).9. Check sensor harness andECU for dirt or moisture in oron connector and for missingor damaged connector seals.Remove dirt and moisture fromconnector. Replace missing ordamaged connector seals (WP0111 00).10.Place ignition switch in OFFposition and disconnectsensor harness connectorfrom ECU.11.Measure resistance from pin6 of sensor harness connectorto all other pins in theconnector. Resistance shouldbe greater than 100k ohms.If engine harness requiresreplacement, notify SRA.>100K OHMS
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