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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Signal Ground

The signal ground circuit Z11 connects to cavity 52 of the Powertrain control Module (PCM). The Z11 circuit provides ground for the sensors that provide inputs to the PCM. Internal to the PCM, the signal ground circuit connects to the PCM sensor return circuit (from circuit K4) and the power (device) ground circuit (Z12).

The termination point for circuit Z11 is an eyelet attached to the left side radiator closure panel.