TM 10-3930-675-20-1 0026 00-5 TRANSMISSION TEMPERATURE TROUBLESHOOTING - CONTINUED 0026 00 Table 4. Error Code 640 - Converter Output Temperature Sensor Failure, Short Circuit to Chassis Troubleshooting Procedures. MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION Error Code 640 - Converter Output Temperature  Sensor  Failure,  Short  Circuit  to Chassis - Continued 5. Disconnect   connector   766, connector X172, and connector    on    transmission ECU. 6. Check continuity to chassis at connector 766 pin 1, connector    X172    pin    12, connector   766   pin   2,   and connector X172 pin 13. a.  If continuity is present, repair or  replace  connectors  (WP 0111 00). b. If   wiring   harness   must   be replaced, notify SRA. 7. Perform   internal   resistance check on temperature sensor. Resistance   should   be   800- 1500 ohm. If resistance is not as specified, replace temperature sensor (WP 0095 00). 8. Perform    continuity    check between  temperature  sensor pin 1 and pin 2 and chassis. If continuity is present, replace temperature  sensor  (WP  0095 00). Table 5. Error Code 783 - Sump Temperature Critical Threshold [212°F (100°C)] Failure Troubleshooting Procedures. MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION Error  Code  783  -  Sump  Temperature  Critical Threshold [212°F (100°C)] Failure 1. Allow engine and transmission to cool. 2. Check coolant level (TM 10- 3930-675-10). Add coolant as required (TM 10- 3930-675-10). 3. Check  radiator  top  and  side grille    for    mud,    snow    or obstructions. Clear obstructions. 4. Check   loose   coolant   hoses and clamps. Tighten  or  replace  as  required (WP 0064 00 and WP 0113 00). 5. With engine idling, transmission selector lever in N (Neutral) position, parking brake applied, and  engine  at operating temperature, check transmission fluid level (TM 10-3930-675-10). Add     transmission     fluid     as required (LO 10-3930-675-12).