Tag DM303

Gleaner Combine Showed an Unknown DTC During Harvest: Isolate the CAN Branch Before Buying Modules

Follow a Gleaner combine's unknown DTC through CAN branch isolation to an aftertreatment harness—without falsely naming an unproven component.

Follow a DAF CF hot cutout and no-restart through the stall capture to an engine ECU that stopped transmitting on J1939.

Follow an intermittent Case 821F CAN timeout where engine messages vanished while the ECU's power and ground remained stable.

Follow a Volvo FMX rail-pressure case where every injector leaked, hiding the result of ordinary one-at-a-time comparison.

Follow a Scania R480 rough-idle case where a healthy sister truck made the damaged crank-sensor signal unmistakable.

See how a New Flyer articulated bus with no codes, black smoke and misfire was fixed by restoring an omitted ICV suppressor.

Follow a JCB telehandler VGT fault that sounded like network trouble but failed only when the actuator drove itself.

See how a controlled EGR A/B test identified the valve behind a JCB JS220 black-smoke and stalling complaint.

See why a Fiat Kobelco E135 kept damaging stop solenoids until alternator ripple was measured and repaired.

Follow a Ford B-Max P0102 past a replacement MAF to a broken supply wire and a second failed ECU ground path.