FF24 - Check PSPS State w/Engine Running and Load vs. No Load

- Engine speed at idle.

- Breakout box installed, Powertrain Control Module (PCM) connected.

- Power Steering Pressure (PSP) switch connected.

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

- Turn the steering wheel at least one-half turn then return to center position.

- Does resistance change from infinity to less than 30 ohms (indicating PSP closing), then return to infinity when steering wheel is returned to center position?

Yes -- PSP system OK. Remove breakout box. Testing completed.

No -- Replace PSP switch. Remove breakout box. Rerun quick test. Quick Test Appendix (Detailed Testing Instructions)