FF4 - Check PSPS Circuits For Shorts

- Key "OFF".

- Power Steering Pressure (PSP) switch disconnected.

- Disconnect Powertrain Control Module (PCM). Inspect for damaged or pushed out pins, corrosion, loose wires, etc. Service as necessary.

- Install breakout box, leave PCM disconnected.

- Measure resistance between test pin 28 and test pin 46 at the breakout box.

- Is resistance less than 10,000 ohms?

Yes -- Service short in harness. Remove breakout box. Reconnect all components. Re-evaluate symptom.

No -- Replace PCM. Remove breakout box. Reconnect all components. Re-evaluate symptom.