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Home >> Mercury >> 2008 >> Milan Base, 3.0 1, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 821 (Handles, Locks, Latches And Entry Systems (F250-F550)) >> Diagnostic Tests >> Locks, Latches and Entry Systems - Module Controlled >> Pinpoint Tests >> Pinpoint Test F: The Doors Do Not Lock/Unlock Using The Keyless Entry Keypad >> Normal Operation

Normal Operation

WARNING: This page is about a different car, the 2007 Ford Pickup, 2007 Ford F550 Super Duty, 2007 Ford F450 Super Duty, and 2007 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

The vehicle security module monitors circuits 121 (YE/BK), 122 (YE), and 123 (RD). When the vehicle security module receives the correct keypad code, it sends voltage through circuits 163 (RD/OG) and 118 (PK/OG) to unlock all the doors. The vehicle security module monitors circuits 122 (YE) and 123 (RD). The vehicle security module receives the signal on both circuits at the same time. The vehicle security module then sends voltage through circuit 117 (BK/PK) to lock all the doors. The power door lock actuators operate in either the lock or unlock direction based on which circuit(s) are supplying voltage.

DTC B2675 - is an on-demand DTC that sets if the vehicle security module detects a short to ground on the keyless entry keypad VREF circuit 122 (YE).

DTC B2676 - is an on-demand DTC that sets if the vehicle security module detects a short to ground on the keyless entry keypad VREF circuit 123 (RD).

DTC B2695 - is an on-demand DTC that sets if the vehicle security module detects a short to ground on the keyless entry keypad VREF circuit 121 (YE/BK).

Possible Causes

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