Table 3. Error Code 123 - 10V Reference Voltage for Servo ECU (790) Failure Troubleshooting Procedures

Table 2. Error Code 122 - Supply Voltage to Servo ECU (790) Failure Troubleshooting Procedures

Error Code 123 - 10V Reference Voltage for Servo ECU (790) Failure - Continued

TM-10-3930-675-20-1 Rough Terrain Container Handler (RTCH): RT 240; 53 000 Lb Capacity; 4x4 Manual
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TM 10-3930-675-20-1 0012 00-4 ELECTRONIC CONTROL UNIT (ECU) INPUT VOLTAGE TROUBLESHOOTING - CONTINUED 0012 00 NOTE ECU (790) has detected a 10V reference voltage out of range (9.3-10.4V). Table 3. Error Code 123 - 10V Reference Voltage for Servo ECU (790) Failure Troubleshooting Procedures. MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION Error Code 123 - 10V Reference Voltage for Servo ECU (790) Failure 1. Ensure that emergency stop switch is not activated. Release emergency stop switch as required (TM 10-3930-675- 10). 2. Remove cab circuit breaker panel cover and ensure that circuit breakers F30 and F32 are not tripped. Reset circuit breakers as required (WP 0073 00). 3. Remove servo ECU (790) cover from operator’s seat base and slide ECU mounting tray out (WP 0079 00). 4. Disconnect ECU (790) con- nectors X155 and X157. 5. Enter “DIAG SERVO 1 (13)” menu and check voltage of 10V REF OUT. Voltage should be 9.3-10.4V. a. If voltage is correct, connect connector X155 and continue with troubleshooting pro- cedure. b. If voltage is not as specified, check continuity between servo ECU (790) connector 1 in 26 and connector X155 pin 13 and between servo ECU (790) connector 1 pin 27 and connector X155 pin 12. a. If continuity is present, replace servo ECU (790) (WP 0079 00). b. If continuity is not present, notify SRA. DIAG SERVO 1(13) SYSTEM POWER 24.00V POWER RI CAN 24.00V POWER LE CAN 24.00V 10V REF OUT 10.00V

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