CATERPILLAR 3516 C, SPN:1656 Engine automatic start enable switch

When Engine Control Switch (ECS) changed over to local position, engine starts and run without any above mentioned alarm.

 But when remote position on ECS selected and “START” push button in ECR actuated, alarm raised and remain on display and consequently “SLOWDOWN” mode activated on CPP.

  Wiring on M/E connection box and control box checked, Run /Stop relays and all relays inside panel checked and was not found abnormality.

Signals between Main engine and CPP checked and compared to STBD side and found same.


hence you are kindly requested to advise the sub engine starting circuit wiring diagram and what could be the source of fault?