Operation CHARM: Car repair manuals for everyone.
Home >> Ford >> 2008 >> F 150 2WD V8-5.4L >> Repair and Diagnosis >> Body and Frame >> Locks >> Power Locks >> Testing and Inspection >> Pinpoint Tests >> Test J: The Autolock Does Not Operate Correctly
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

Test J: The Autolock Does Not Operate Correctly

PINPOINT TEST J: THE AUTOLOCK DOES NOT OPERATE CORRECTLY

Normal Operation
When autolock is enabled, the vehicle security module (VSM) locks the doors when the following conditions are met:

NOTE: The autolock feature is not available on vehicles equipped with a manual transmission.
- All the doors are closed
- The ignition switch is in the ON position
- The vehicle is shifted into any gear putting the vehicle in motion
- The brake pedal is released and the vehicle attains a speed greater than 8 km/h (5 mph)

The VSM receives the brake pedal position (BPP) switch, transmission range (TR) sensor and the vehicle speed signal (VSS) inputs from the instrument cluster (IC) through the universal asynchronous receiver-transmitter (UART)-based protocol (UBP) communications network.

This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Door ajar switch input
- UBP communications network
- VSM


J1-J4:






J4-J5:




pro multis · About Operation CHARM