Jeffrey Bandel
Senior Member
Great. I replaced the MAF sensor and it didn't solve the issue. Your advice is to check the harness that plugs into the sensor?
It all depends on how the ECM is oriented in the particular machine installation. I always prefer to confirm the identity of J1 & J2 by using wire colours and numbers from the schematic combined with the Pin Numbers of J1 & J2 (which are marked on the back of each connector).Are the connectors to the ecm labeled? Is J1 forward or rear?
I get what you're saying, but from experience harness repairs to sensor wiring are a constant source of problems, because some of it carries either stabilized voltage or the ground for said stabilized voltage, and the rest carries PWM square wave signals. Neither of those two categories like being interrupted though splices too much.I fixed all the wiring and it tested good. It could be that or the left speed sensor. Sure would be nice to have a display that showed the problem.