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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Preliminary Information






The following charts contain data and instructions for measuring voltage levels on the Integrated Central Electronics (ICE) control module.

Remember:
- All readings should be obtained with the use of a Breakout Box (BOB) connected between the control module and the control module connector.
- Several voltage levels should be regarded as guiding values only. Use your common sense when judging whether a particular reading is correct or not.
- If a test reading is wrong, consult the wiring diagram to find out which cables, connectors or components should be checked further.
- All test readings are with the engine at normal operating temperature.
- Unless otherwise stated, the ignition should be switched on.
- Specified readings are for calibrated Fluke 88/97.