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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Barometric Pressure Sensor

Barometric Pressure Side Voltage Measured At PCM terminal 3H:
EGR Boost Signal Side Voltage Measured At PCM terminal 3N:

Barometric Pressure 101.3 kPa (29.9 in Hg) Approx. 4.0 Volts
A 20 kPa (5.9 in Hg) vacuum applied
B 43 kPa (12.7 in Hg) vacuum applied
Variation Between A and B Approx. 1.5 Volts