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Home >> Ford >> 2008 >> E 450 V8-6.0L DSL Turbo >> Repair and Diagnosis >> Body and Frame >> Locks >> Power Locks >> Testing and Inspection >> Pinpoint Tests >> Locks, Latches And Entry Systems - Module Controlled >> Test E: DTCs B2574 And B2575: Driver Door Lock/Unlock Switch Short To Ground
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Test E: DTCs B2574 And B2575: Driver Door Lock/Unlock Switch Short To Ground

PINPOINT TEST E: DTCs B2574 AND B2575: DRIVER DOOR LOCK/UNLOCK SWITCH SHORT TO GROUND

Normal Operation
The vehicle security module (VSM) sends voltage signals to the door lock control switches through circuits 119 (PK/YE) and 120 (PK/LG) for the lock and unlock requests, respectively. When the lock or unlock switch is pressed, the voltage signal is routed to ground. Ground for the door lock control switches is provided through circuit 57 (BK).

- DTC B2574 (Drivers Door LOCK Switch Short to Ground) - is a continuous and on-demand DTC that sets if the VSM detects a short to ground on the door lock control switch circuit 119 (PK/YE).
- DTC B2575 (Drivers Door UNLOCK Switch Short to Ground) - is a continuous and on-demand DTC that sets if the VSM detects a short to ground on the door lock control switch circuit 120 (PK/LG).

This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Door lock control switch
- VSM


E1-E5:






E5-E6:




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