What is a PCM power diode?

What is a PCM power diode?

What would cause an ecm diode on 2011 Ford mustang 5.0 to go bad and what are the symptoms? The PCM power diode is put into the fuel pump and PCM relay power circuit to prevent power surge feedback into the circuit called flyback voltage then can be higher than normal operating voltage.

Where is the PCM relay on a 2003 Ford Explorer?

These relays are located on the reverse side of the passenger compartment fuse panel.

Where is the PCM on a 2002 Ford Explorer?

Located on passenger side, can see the connections from under the hood.

Where is the PCM on a 2001 Ford Explorer?

The 5.0L V8 in the 2001 Explorer has two coils – each one firing four plugs. The ignition system / spark is controlled by the PCM. There is a PCM relay in the battery junction box – the box with fuses and relays near the battery.

How do you know if a PCM relay is bad?

7 Common PCM Failure Symptoms

1. Your ‘Check Engine’ Light is On.
2. Your Car Won’t Start or Starts Roughly.
3. Sudden Loss of Gas Mileage.
4. You Failed Your Emissions Test.
5. Your Engine Stutters or Stalls.
6. Erratic or Random Shifting.
7. You’re Receiving a PCM-Related Error Code.
8. What to Do If You Experience PCM Failure Symptoms.

How do you test a PCM diode?

The Diode Test procedure is conducted as follows:

1. Make certain a) all power to the circuit is OFF and b) no voltage exists at the diode. Voltage may be present in the circuit due to charged capacitors.
2. Turn the dial (rotary switch) to Diode Test mode.
3. Connect the test leads to the diode.
4. Reverse the test leads.

Where is the fuse for power windows on a 2002 Ford Explorer?

Check fuse #17 in the central junction box (under the dash on the driver’s side).

How many fuse boxes are in a 2002 Ford Explorer?

There are two fuse boxes in Your 2002 Ford Explorer. The main fuse relay box is located on the left inner fender well under the hood. The auxiliary fuse/relay block is located under the driver’s side instrument panel.

Where is the PCM on a Ford Explorer?

The power control module (PCM) in a 2013 Ford Explorer is located behind the front bumper on the driver’s side, it is about four inches in front of the drivers tire.

Where is the ECM in a Ford Explorer?

The ECM is located behind the kick panel, in front of the passenger door, below the glove box, to the right of the passengers feet.

Where is the PCM relay located?

The relay is located in the engine main fuse relay control box. The defective ECM-power relay is removed from the control box by pulling it straight up and out of socket.