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Home >> Mercury >> 2008 >> Milan Base, 2.3 Z, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 1385 (Starting System) >> Diagnosis And Testing >> Starting System >> Pinpoint Tests >> Pinpoint Test A: The Engine Does Not Crank >> Normal Operation

Normal Operation

WARNING: This page is about a different car, the 2009 Mercury Milan, 2009 Lincoln MKZ, and 2009 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.

Under normal operation, constant power is supplied to the starter relay on circuit SBB02 (YE/RD), the starter on circuit SDC02 (RD) and to the ignition switch on circuit SBB14 (BN/RD). When the key is placed in the START position, with the vehicle in PARK or NEUTRAL or with the clutch pedal depressed, power is supplied to the smart junction box (SJB) on circuit CE336 (GN/WH) to the starter relay. Inputs from the Transmission Range (TR) sensor and Clutch Pedal Position (CPP) switch to the PCM provide a ground to the starter relay on circuit CDC12 (YE). When the coil of the relay is energized, it sends power to the starter motor on circuit CDC25 (BN/GN).

This pinpoint test is intended to diagnose the following:

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