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Test Db: Map/BARO Sensor: Testing

WARNING: This page is about a different car, the 2002 Ford Pickup and 2002 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

  1. 1) Check MAP PID

    Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, access AFCM and select MAP PID from PID/DATA MONITOR & RECORD menu. If MAP PID value reads about local barometric pressure, leave scan tool connected and go to next step. If MAP PID value does not read about local barometric pressure, perform COMPUVALVE CHECK  under QUICK TEST. If fault still exists, replace compuvalve.

  2. 2) Check MAP/BARO Sensor

    Start engine and allow to idle. Using scan tool, access AFCM and select MAP PID from PID/DATA MONITOR & RECORD menu. Connect hand-held vacuum pump to MAP inlet on compuvalve. Apply low, and then high vacuum to MAP sensor. If MAP PID reading changes from a low value with low vacuum applied to a high value with high vacuum applied, go to next step. If MAP PID reading does not change from a low value with low vacuum applied to a high value with high vacuum applied, perform COMPUVALVE CHECK  under QUICK TEST. If fault still exists, replace compuvalve.

  3. 3) Check Vacuum Source To Compuvalve

    Connect vacuum gauge to MAP vacuum supply line. Start engine and allow to idle. If vacuum gauge reads manifold vacuum, perform COMPUVALVE CHECK  under QUICK TEST. If fault still exists, replace compuvalve. If vacuum gauge does not read manifold vacuum, repair vacuum supply line. Clear DTCs and retest.
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