TM 10-3930-675-20-10015 00-4ELECTRONIC CONTROL UNIT (ECU) SUPPLY VOLTAGE TROUBLESHOOTING - CONTINUED0015 00Table 5. Error Code 813 - Voltage Failure at Transmission Gearshift Valve Supply Troubleshooting Procedures.MALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTIONError Code 813 - Voltage Failure at TransmissionGearshift Valve Supply1. 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 checkconnection block X172 forproper connections.Connect loose or disconnectedconnectors.3. Move cab to transportposition and removetransmission access covers(WP 0135 00).4. Check transmission electricalharness connector 827 forproper connection.Connect loose or disconnectedconnectors.5. Disconnect transmissionconnector 827, connectorX172, and ECU (793)connector.6. Check continuity betweenconnector 827 pin 7 andconnector X172 pin 7,between connector 793 pin 12and connector X172 pin 7,and between connector 793pin 13 and connector X172pin 7. Also check forcontinuity to chassis.a. If continuity is present, notifySRA.b. If continuity is not present,repair or replace connectors(WP 0111 00). c. If wiring harness must bereplaced, notify SRA.7. Check voltage at connectorX47 pins 1 and 2.If voltage is present, notify SRAto replace wire 473.
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