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

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NA11 - Check PCM For Short to Power



- Key "OFF".

- Breakout box installed.

- Powertrain Control Module (PCM) connected to breakout box.

For vehicles with Remote Mounted Ignition Control Module (ICM) and Camshaft Position (CMP) sensor:

- Disconnect ICM and CMP

For all others:

- Disconnect ICM.

- Measure voltage between test pin 4 and chassis ground.

- Key "ON", engine "OFF".

- Measure voltage between test pin 4 and test pins 40 and 60 at the breakout box.

- Is any voltage reading greater than 10.5 volts?

Yes -- Replace PCM. Remove breakout box. Reconnect all components. Rerun quick test. Quick Test Appendix (Detailed Testing Instructions)

No -- Go to NA12. NA12 - Check PCM For Short to Ground