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 Tests and General Diagnostics

Inspection
1. Disconnect the PCM connector.
2. Connect the SST (104 pin breakout box) between vehicle harness and PCM.
3. Measure the voltage at each terminal with a voltmeter.
















4. If any PCM terminal voltage is incorrect, check the related input or output devices and wiring. if no problem is found, replace the PCM.

NOTE: All values shown may vary + 20% depending on operating conditions and other factors. RPM values are axle and tire dependent.




PID Data Monitor

NOTE: You can also inspect any PID values through scan tool or SST New Generation Star (NGS) tester.