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
X4 - PCM Ground Fault Isolation
-
Key "OFF".
-
Breakout box installed,
Powertrain Control Module (PCM) connected.
-
Measure resistance between test pin 46 and test pins 40 and 60 at the breakout box.
-
Is each resistance less than 5.0 ohms? Yes -- Go to X5.
X5 - Check SIG RTN Circuit Continuity No -- Replace PCM. Remove breakout box. Rerun quick test.
Quick Test Appendix (Detailed Testing Instructions)