Hombre XS Space Cab L4-2.2L CPC (1997)
Air Bag Control Module: Description and Operation
Notice: Do not open the DERM case for any reason. Touching the connector pins, or the soldered components may cause electrostatic discharge
damage. Replacement is the only way to repair a malfunctioning DERM.
The DERM performs the following functions in the Supplemental Restraint System (SRS):
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Energy Reserve: The DERM maintains a 36 Volt Loop Reserve (36 VLR) energy supply in order to provide deployment energy when the
voltage is low or lost in a frontal crash.
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Malfunction Detection: The DERM performs diagnostic monitoring of the Supplemental Restraint System (SRS) electrical components.
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Malfunction Recording: The DERM provides SRS diagnostic trouble code information through a scan tool.
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Driver Notification: The DERM controls the AIR BAG warning lamp. This warns the vehicle driver of SRS malfunctions.
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Frontal Crash Recording: The DERM records the SRS status during a frontal crash.
The DERM is connected to the SRS wiring harness by a 24-way connector. When the DERM harness connector is disconnected, a shorting bar
connects the AIR BAG warning lamp to ground . This causes the AIR BAG warning lamp to light up whenever the ignition switch is at the RUN or
the START position.
