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good evening and thank you for inquiring with JustAnswer, my name is XXXXX XXXXX i will be the technician assisting you today. Below i have included the lamp flashcode chart for you to review. Code 18 referrs to a fault with the passsenger airbag deactivation lamp. It could be one of 2 faults as you can see in the chart, but the use of the ford scantool will be required to determine the fault. Most likely if the lamp does not come on first check to see if it is unplugged, if not then it could be the lamp itself or a broken wire from the module to the lamp, though that is unlikely
Restraints Control Module (RCM) Diagnostic Trouble Code (DTC) Table
Pinpoint Test D: LFC 18/DTC B1884 - PAD Warning Lamp Circuit Failure
When the ignition is in the ON position, the PAD indicator prove-out period is initiated by the restraints control module (RCM). The RCM briefly activates the PAD indicator to verify to the occupants proper functional operation of the PAD indicator. Refer to Air Bag and Safety Belt Pretensioner Supplemental Restraint System (SRS) in this section.
If the RCM detects an open or short to ground on the PAD indicator circuit, it will store diagnostic trouble code (DTC) B1884 in memory and flash lamp fault code (LFC) 18 (or higher priority code if one exists) on the air bag indicator.
A PAD indicator circuit open or short to ground can be caused by:
NOTE: Most faults are due to connector and/or wiring concerns. Carry out a thorough Inspection and Verification before proceeding with the pinpoint test.
WARNING: Restraint system diagnostic tools are for service only. Tools must be removed prior to operating the vehicle over the road. Failure to remove restraint system diagnostic tools could result in injury and possible violation of vehicle safety standards.
WARNING: Never probe the connectors on the air bag module. Doing so can result in air bag deployment, which can result in personal injury.
WARNING: The safety belt pretensioner is a pyrotechnic device. Always wear safety glasses when repairing an air bag equipped vehicle and when handling a safety belt buckle pretensioner or safety belt retractor pretensioner. Never probe a pretensioner electrical connector. Doing so could result in pretensioner or air bag deployment and could result in personal injury.
NOTE: After diagnosing or repairing an SRS, the restraint system diagnostic tools must be removed before operating the vehicle over the road.
NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer.
NOTE: Make sure all restraint system diagnostic tools, sensor electrical connectors and the RCM electrical connector are connected before carrying out the on-demand self test. If not, erroneous DTCs will be recorded.
Pinpoint Test E: LFC18/DTC B1890 - PAD Warning Lamp Circuit Short to Battery
When the ignition is in the on position, the PAD indicator prove-out period is initiated by the restraints control module (RCM). The RCM briefly activates the PAD indicator to verify to the occupants proper functional operation of the PAD indicator. Refer to Air Bag and Safety Belt Pretensioner Supplemental Restraint System (SRS) in this section.
If the restraints control module detects a short to battery on the passenger air bag deactivation (PAD) warning lamp circuit, it will store diagnostic trouble code (DTC) B1890 in memory and flash lamp fault (LFC) 18 (or higher priority code if one exists) on the air bag indicator.
A PAD indicator circuit short to battery can be caused by:
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