Table 1. Error Code 1221 - High Voltage Detected at Ambient Air Pressure Sensor Circuit Troubleshooting Procedures

ENGINE AMBIENT AIR PRESSURE SENSOR AND CIRCUITS TROUBLESHOOTING - TM-10-3930-675-20-1_373

Error Code 1221 - High Voltage Detected at Ambient Air Pressure Sensor Circuit - Cont - TM-10-3930-675-20-1_375

TM-10-3930-675-20-1 Rough Terrain Container Handler (RTCH): RT 240; 53 000 Lb Capacity; 4x4 Manual
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TM 10-3930-675-20-1 0021 00-2 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 4. Install breakout cable between sensor and sensor harness connector. Place ignition switch to ON and measure supply voltage from pin A to pin B of breakout cable. Voltage should be 4.75-5.25V. If voltage is not as specified, proceed with the following steps. 5. Disconnect sensor harness connector from ECU and place ignition switch in ON position. Measure voltage at ECU sensor port from pin 17 to pin 31 of ECU sensor port. Voltage should be 4.75- 5.25V. a. If engine harness requires replacement, notify SRA. b. If voltage is not as specified, replace engine ECU (WP 0078 00). 4.75-5.25V A B C

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