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)
Or, hide this message:
temporarily or
permanently
Oil Pressure Switch
The oil pressure switch is located in the engine block near the oil filter cartridge housing. The switch is closed with low engine oil pressure. The switch will be closed with engine not running. When the switch is closed the input at the
PCM will be low
(zero volts). The PCM sends a class II message to the I/P cluster to turn On the low oil pressure telltale. The switch opens with engine oil pressure. When the switch opens the PCM input will be high (ignition voltage). The PCM will command the low oil pressure telltale Off.