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

PC1 - Check Power to PCM



NOTE: Before proceeding with this Pinpoint Test, verify that the base timing check has been performed.

- Key "OFF".

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

- Install breakout box, leave PCM disconnected.

- Key "ON", engine "OFF".

- Measure voltage between test pin 37 and test pin 40 at the breakout box.

- Measure voltage between test pin 57 and test pin 60 at the breakout box.

- Is each voltage greater than 10.5 volts?

Yes -- Go to PC2. PC2 - Check Spout Circuit Continuity

No -- Go to pinpoint test step B1. B1 - Check Battery Voltage