DT3 - Check PCM Response

- Key "ON", engine "OFF".

- Power Steering Pressure (PSP) sensor disconnected.

- Start engine. While at idle, jumper between VREF and PSP sensor signal pins at the PSP sensor vehicle harness connector.

- Does idle speed increase?

Yes -- Reconnect PSP sensor. Go to DT4. DT4 - Check PSP Sensor Operation

No -- Go to DT5. DT5 - Check Continuity of PSP Signal Circuit