TM 10-3930-675-20-10047 00-7TOPHANDLER TWISTLOCKS AND FORKLIFT SENSOR TROUBLESHOOTING - CONTINUED0047 00Table 4. Error Code 243 - Tophandler Twistlock Locking Circuit FailureTroubleshooting Procedures - Continued.MALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTIONError Code 243 - Tophandler Twistlock LockingCircuit Failure - Continued3. Disconnect connector X189from tophandler junction boxat end of boom. Place ignitionswitch to ON position andperform voltage checkbetween connector X189 pinL and pin M.a. If 20-25V is present, checkcontinuity between con-nector X189 pin L andconnector 6040 pin 1 andbetween connector X189pin M and connector 6040pin 2. Check continuitybetween connector 6040pin 1 and pin 2 and tochassis. Check continuitybetween connector X189pin M and ECU (791)connector 2 pin 16.a. If continuity is not present,repair or replace connectors(WP 0111 00). b. If wiring harness requiresreplacement, notify DSMaintenance.b. If voltage is not present,enter “DIAG ATTACH-MENT 6 (16)” menu andcheck voltage of LOCKEDOUTPUT. Voltage shouldbe present with joystickactivated to lock/unlock(press switch twice for lockand unlock).a. If voltage is not present,replace ECU (791) (WP 007600).b. If voltage is present, notifySRA.
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