TM 10-3930-675-20-10038 00-2HYDRAULIC PISTON PUMP CUT-OFF TROUBLESHOOTING - CONTINUED0038 00Table 1. Error Code 172 - Hydraulic Piston Pump Cut-Off, Open or Short Circuit FailureTroubleshooting Procedures - Continued.MALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTIONError Code 172 - Hydraulic Piston Pump Cut-Off, Open or Short Circuit Failure - Continued5. If voltage was not present instep 3, check continuitybetween connector X158 pin13 and solenoid611connector pin 1 and betweenconnector X158 pin 14 andsolenoid (611) connector pin2.a. If continuity is not present,repair or replace connectors(WP 0111 00). b. If wiring harness must bereplaced, notify SRA.6. Disconnect connector X158located under driver’s seat.7. Check continuity betweenconnector 611 pin 1 and pin 2and between connector 611pin 1 and pin 2 and chassis.a. If continuity is present, repairor replace connectors (WP0111 00). b. If wiring harness must bereplaced, notify SRA.8. Check continuity betweenECU (790) connector 2 pin 6and connector X158 pin 14and between ECU (790)connector 2 pin 10 andconnector X159 pin 1.a. If continuity is not present,repair or replace connectors(WP 0111 00). b. If wiring harness must bereplaced, notify SRA.9. Check continuity betweenconnector X159 pin 1 andconnector X158 pin 13.a. If continuity is not present,repair or replace connectors(WP 0111 00). b. If wiring harness must bereplaced, notify SRA.10.Enter “DIAG SERVO12(13)” menu and checkPUMP OFF OUTPUTvoltage. Voltage should bepresent with override switchactivated more than 2seconds.If voltage is not as specified,replace ECU (790) (WP 007900).
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