TM 10-3930-675-20-10026 00-1TRANSMISSION TEMPERATURE TROUBLESHOOTING0026 00THIS WORK PACKAGE COVERSError Code 637 - Transmission Sump Temperature Sen-sor Failure, Open Circuit or Short Circuit to BatteryError Code 638 - Transmission Sump Temperature Sen-sor Failure, Short Circuit to ChassisError Code 639 - Converter Output Temperature SensorFailure, Open Circuit or Short Circuit to BatteryError Code 640 - Converter Output Temperature SensorFailure, Short Circuit to ChassisError Code 783 - Sump Temperature Critical Threshold[212°F (100°C)] FailureError Code 795 - Converter Output Temperature CriticalThreshold [248°F (120°C)] FailureINITIAL SETUPReferencesTM 10-3930-675-10LO 10-3930-675-12ECU Transmission (A34650.0200) (WP 0199 00-12)Equipment ConditionCab moved to transport position (TM 10-3930-675-10)NOTE•Refer to WP 0004 00 for additional troubleshooting guidance, information, and illustrationsthat locate critical components.•Refer also to illustration at end of work package for component location.Table 1. Error Code 637 - Transmission Sump Temperature Sensor Failure, Open Circuit orShort Circuit to Battery Troubleshooting Procedures.MALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTIONError Code 637 - Transmission SumpTemperature Sensor Failure, Open Circuit orShort Circuit to Battery1. Remove cab transmission andsteering ECU panel cover andcheck transmission ECUconnector for properconnection (WP 0079 00).Connect loose or disconnectedconnector.2. Remove cab rear wall centerpanel cover and checkconnector X172 for properconnections.Connect loose or disconnectedconnectors.3. Move cab to transportposition and removetransmission access covers(WP 0135 00).
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