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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Speed Sensor

Fig. 7 EC-AT control unit connector terminal 1Q location. 1988 626 & MX-6:





1. Connect voltmeter between 1Q terminal of EC-AT control unit and ground, Fig. 7.
2. Turn ignition switch to On position.
3. Remove speedometer cable from transaxle.
4. Slowly turn speedometer cable one turn.
5. If approximately 4.5 volts does not show 4 times, check combination meter.