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)

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Required Tools and Equipment

The following equipment is required to diagnose and repair the Electronic Engine Control (EEC-IV) system:

Self Test Automatic Readout (STAR) Tester:





Self Test Automatic Readout (STAR) Tester (Rotunda 007-00004, or equivalent)

Analog Volt/Ohm Meter:





Analog Voltmeter (If STAR tester not available)

Jumper Wire:





Jumper Wires

Vacuum Gauge:





Vacuum Gauge (Rotunda 059-00008, or equivalent)

Tachometer:





Tachometer (Rotunda 059-00010, or equivalent)

Breakout Box:





Breakout Box (Rotunda 014-00322, or equivalent)

Vacuum Pump:





Vacuum Pump (Rotunda 021-00014, or equivalent)

Digital Volt-Ohmmeter (DVOM):





Digital Volt-Ohm Meter (DVOM) (Rotunda 014-00407, or equivalent)