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

Component




A/C ON-OFF Signal (Test Pins Are On SST Breakout Box):





TEST 1

Is Powertrain Control Module (PCM) terminal 10 voltage OK with PCM connector disconnected?

Condition Voltage
A/C On Battery positive
voltage
A/C Off Approx. 0 Volts

YES -- Replace PCM.

NO -- Check A/C Switch.