biggy238
Active member
- Joined
- Aug 3, 2008
- Messages
- 10,959
I'm starting this thread to keep the hardware issue out of the EFI thread.
P0628 Fuel Pump Control Circuit Low
I've ohmed from C1-6 to C1-19, with FCA connected. Wires have the minimum ohm load, 0.2. With the new FCA plugged in, that jumps to 3ohms, which is the resistance of the solenoid.
With an oscilloscope connected between the circuit and ground, I have between 6-7V constant. There is no pulse width taking place.
Paper clipping across the connector got me a P0251.
Pins on the ECM are ok. Sockets in the connector are seated.
I'm to the point that I think the ECM has a defect on the low side driver.
I'm also suspicious I have a problem on the MAP. It refuses to read ambient, and last time I looked, it was showing 5psi boost even aftert he sensor was re-scaled.
Anyone seen this before?
P0628 Fuel Pump Control Circuit Low
I've ohmed from C1-6 to C1-19, with FCA connected. Wires have the minimum ohm load, 0.2. With the new FCA plugged in, that jumps to 3ohms, which is the resistance of the solenoid.
With an oscilloscope connected between the circuit and ground, I have between 6-7V constant. There is no pulse width taking place.
Paper clipping across the connector got me a P0251.
Pins on the ECM are ok. Sockets in the connector are seated.
I'm to the point that I think the ECM has a defect on the low side driver.
I'm also suspicious I have a problem on the MAP. It refuses to read ambient, and last time I looked, it was showing 5psi boost even aftert he sensor was re-scaled.
Anyone seen this before?