TM 10-3930-675-20-10029 00-4MISCELLANEOUS TRANSMISSION FAILURE TROUBLESHOOTING - CONTINUED0029 00Table 4. Error Code 747 - Backup Alarm Control Circuit, Open Circuit Failure Troubleshooting Procedures.MALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTIONError Code 747 - Backup Alarm Control Circuit,Open Circuit Failure1. Place gear selector in N(Neutral) position (TM 10-3930-675-10).2. Remove cab circuit breakerpanel cover and ensure thatcircuit breaker F10 is nottripped.Reset circuit breaker as required(WP 0073 00).3. Open cab distribution box toaccess relay circuit board.4. Check voltage at connectorXK5 pin 7.If voltage is not present, notifySRA to repair or replace wireA57.5. Check voltage at connectorXK5 pin 2.If voltage is not present, replacetransmission ECU (WP 007900).6. Check voltage at relay 305 pin86.If voltage is not present, replacetransmission ECU (WP 007900).7. Remove cab transmission andsteering ECU panel cover anddisconnect transmission ECU(793) connector (WP 007900).8. Check continuity betweenECU (793) connector pin 7and connector X177 pin 10.If continuity is not present,repair or replace connectors (WP0111 00).9. Check continuity betweenconnector X177 pin 10 andconnector X160 pin 10.If continuity is not present,repair or replace connectors (WP0111 00).10.Check continuity betweenconnector X160 pin 10 andconnector X150 pin 7.If continuity is not present,repair or replace connectors (WP0111 00).
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