Re: Terrano rev counter swings wildly (or not at all)
Posted: Fri Jun 22, 2012 6:28 pm
Hello.
I'm sorry I can't tell you about any specific common problems with this vehicle but certainly wiring and connectors would be the predominant issue with these sorts of things.
Given that the wiring between the body and motor, and associated connectors, suffers the most movement and vibration this is where I'd start. It's a no-cost check just to follow the cable from the rpm sensor (I think around the gear drive to the injector pump for your model - someone else may have one, or know off hand, to confirm) and see if there are any loose or frayed connections/wires. If you were careful and used a mirror or someone in the vehicle with the engine running and manipulated the cable/connectors you might be able to see from that if there's a fault in the line somewhere if the tacho flickers in and out of life.
Failing that then it could be connections/wiring in the cab or the tacho itself - you could pull the instrument assembly out and remove the tacho to closely inspect and ensure the needle isn't bent and jamming on the face... IMO it's unlikely to be the ECU.
Cheers, P.
I'm sorry I can't tell you about any specific common problems with this vehicle but certainly wiring and connectors would be the predominant issue with these sorts of things.
Given that the wiring between the body and motor, and associated connectors, suffers the most movement and vibration this is where I'd start. It's a no-cost check just to follow the cable from the rpm sensor (I think around the gear drive to the injector pump for your model - someone else may have one, or know off hand, to confirm) and see if there are any loose or frayed connections/wires. If you were careful and used a mirror or someone in the vehicle with the engine running and manipulated the cable/connectors you might be able to see from that if there's a fault in the line somewhere if the tacho flickers in and out of life.
Failing that then it could be connections/wiring in the cab or the tacho itself - you could pull the instrument assembly out and remove the tacho to closely inspect and ensure the needle isn't bent and jamming on the face... IMO it's unlikely to be the ECU.
Cheers, P.