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)

Or, hide this message: temporarily or permanently

Checking Oil Pressure Switch

Tests 1 - 4:




Tests 5 - 10:




Tests 11 - 12:




SYMPTOM
CHECKING OIL PRESSURE SWITCH

POSSIBLE CAUSES
- Instrument cluster
- Low oil level
- Low oil pressure warning lamp bulb
- No PCI bus message from cluster
- Warning lamp does not go out
- Engine oil pressure switch sense circuit open
- Engine oil pressure switch sense circuit shorted to ground
- Oil pressure switch
- Oil pressure switch
- Powertrain control module (sense CKT open)
- Powertrain control module (sense CKT shorted to ground)