Normal Operation

WARNING: This page is about a different car, the 2014 Lincoln MKX and 2014 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.

To place the vehicle in RUN mode, locate the Intelligent Access (IA) key inside the vehicle and press the start/stop switch twice without applying the brake pedal. When in RUN mode, the Body Control Module (BCM) module provides a ground for the coil (control) side of the run/start relay located in the Battery Junction Box (BJB). The BCM monitors the run/start relay control circuit; a DTC sets if the circuit is open, shorted to ground or shorted to voltage.

To start the engine, locate the IA key inside the vehicle and press the start/stop switch while the brake pedal is applied.

The start/stop switch provides a voltage input to the BCM , the Remote Function Actuator (RFA) module and the PCM. The 3 modules exchange information over the High Speed Controller Area Network (HS-CAN) to determine if starting the engine is authorized. If the Passive Anti-Theft System (PATS) authorizes the starting of the engine, the PCM supplies power and ground to the starter relay.

B1310:14 (Run/Start Control: Circuit Short to Ground or Open) - The BCM continuously monitors the control side of the run/start relay. This DTC is set if the BCM detects an open or a short to ground on the control circuit. The BCM uses a Field-Effect Transistor (FET) to control the run/start relay. When this DTC sets, the control side of the run/start relay is disabled via the FET . Once the condition that caused the DTC to set is repaired, the BCM must pass a self-test in order for the DTC to clear and the system to resume normal operation.

This pinpoint test is intended to diagnose the following:

Battery
Wiring, terminals or connectors
Fuses
Run/start relay
Brake Pedal Position (BPP) switch
Start/stop switch
Starting system
PATS
Remote Keyless Entry (RKE) system
BCM
RFA module