TM 10-3930-675-20-1 0027 00-9 TRANSMISSION SPEED SENSORS TROUBLESHOOTING - CONTINUED 0027 00 Table 9. Error Code 657 - Internal Speed Sensor Failure, Logical Error Troubleshooting Procedures. MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION Error Code 657 - Internal Speed Sensor Failure, Logical Error Place   ignition   switch   in   OFF position for 30 seconds and then back in ON position. If   error   code   is   still   present, perform    troubleshooting    pro- cedures for error code 655. Table 10. Error Code 658 - Output Speed Sensor Failure, Open Circuit or Short Circuit to Battery Troubleshooting Procedures. MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION Error Code 658 - Output Speed Sensor Failure, Open Circuit or Short Circuit to Battery 1.  Remove cab transmission and steering ECU panel cover and check transmission ECU connector for proper connection (WP 0079 00). Connect  loose  or  disconnected connector. 2.  Remove cab rear wall center panel cover and check connector   X173   for   proper connections. Connect  loose  or  disconnected connectors. 3.  Move cab to transport position and remove transmission   access   covers (WP 0135 00). 4.  Check transmission electrical harness   connector   760   for proper  connection  at  output speed sensor. Connect  loose  or  disconnected connectors. 5.  Check    continuity    between connector   760   pin   1   and connector   X173   pin   1   and between connector 760 pin 2 and connector X173 pin 2. a.  If  continuity  is  not  present, repair  or  replace  connectors (WP 0111 00). b.  If   wiring   harness   must   be replaced, notify SRA. 6.  Disconnect   connector   from transmission ECU.