Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

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