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

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Pinpoint Test

DESCRIPTION
Pinpoint tests are step-by-step diagnostic tests used to isolate the cause of a driveability symptom or system fault. The pinpoint test steps include references to specific Vehicle Systems for component inspection and testing, references to the Wiring Diagrams for circuit routing, and electrical component locations, testing of engine control components (relays, switches, sensors, and solenoids), and basic circuit checks.

NOTE:
- Vehicle inspection and preparation should be performed before starting any pinpoint test.
- Always turn the key to the OFF position unless directed otherwise by the pinpoint test.
- After the fault has been isolated and the correct repairs have been made, restore the vehicle, clear DTCs, rerun Quick Test, remove all test equipment, and reconnect all components.