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

Using (SST)s Engine Signal Monitor

1. Check the mass air flow sensor for damage and cracks.

2. Connect the Special Service Tools (Engine Signal Monitor) to the PCM.
3. Measure the voltage at PCM terminal 3B.

4. Verify that the voltage is within the specification.
5. If not as specified, inspect the harness and connector between the mass air flow sensor and the PCM terminal.
6. If there is correct terminal voltage and harness continuity, replace the mass air flow sensor.