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It is typically the job of the airbag module to sense when the vehicle is decelerating beyond the normal rate, and to deploy the airbags. If the module has suffered excessive corrosion, then this would typically mean that there is water ingress into the interior compartment. Have you also checked the condition of the wiring connectors and looms?
Hi there:The Restraints Control Module (RCM / located behind right side of the instrument panel) monitors the resistance of the driver side air bag circuit loop and the air bag module igniter at RCM, if the resistance is greater than 3.6 ohms, the RCM will store diagnostic trouble code B1994 and flash lamp fault code. About the possible causes, pay attention that a high resistance on the driver side air bag circuit can be caused by:
- damaged wiring on circuit 1257 (WH/LB).
- damaged wiring on circuit 1258 (BN/LB)
- damaged driver side air bag module.
- damaged RCM.
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The Supplemental Air Bag Restraint System consists of two basic sub-systems:
Driver side air bag module (043B13) and passenger side air bag module (044A74).
Electrical system, including RH primary crash front air bag sensor and bracket (14B004) , LH primary crash front air bag sensor and bracket (14B005) , LH kick panel safing rear air bag sensor and bracket (14B007) and air bag diagnostic monitor (14B056) .
Air Bag or Primary Crash Sensor Circuit Shorted to Ground
Inspect air bag sliding contact wiring in steering wheel , driver side air bag module , and passenger side air bag module for damaged, chafed or pinched wires.
there is a colision sensor under the hood. i take it the air bag idiot lite is staying on. the only way to resolve this issue is to have the control module replaced. in some models if the air bag is disabled so is the vehicle.. another govt. safety feature, as you might assume..
9 is not familiar to me. Call dealer service department and ask them what code means.
Here are codes for a 94 Aerostar. I don't have 91 Sable. Sorry.
Air Bag Diagnostic Monitor Diagnostic Trouble Code Priority Table
Diagnostic Trouble Code
No Air Bag Indicator — Inoperative Indicator Circuit or No Battery Positive Voltage to Air Bag Diagnostic Monitor
Continuous Air Bag Indicator — Air Bag Diagnostic Monitor Disconnected or Inoperative
Low Battery Voltage
Air Bag Module or RH Cowl Side Panel Air Bag Sensor Circuit Shorted to Ground
LH Cowl Side Panel Air Bag Sensor Not Mounted to Vehicle Properly
LH Cowl Side Panel Air Bag Sensor Circuit Shorted to Battery Voltage
LH Cowl Side Panel Air Bag Sensor Circuit Input Feed/Return Circuit Open
LH Cowl Side Panel Air Bag Sensor Diagnostic Circuit Open or Low Resistance in Center Air Bag or Front Air Bag
Driver Side Air Bag Circuit High Resistance or Open
Passenger Side Air Bag Circuit High Resistance or Open
Driver Side Air Bag Circuit Low Resistance or Shorted
Passenger Side Air Bag Circuit Low Resistance or Shorted
Center Radiator and RH Cowl Side Panel Air Bag Sensor Circuits High Resistance or Open
RH Cowl Side Panel Air Bag Sensor Not Mounted to Vehicle Properly
Center Air Bag Sensor Not Mounted to Vehicle Properly
Open Splice Center Air Bag Sensor Ground Monitor
Air Bag Diagnostic Monitor Internal Thermal Fuse Blown and Short to Ground No Longer Exists
Backup Power Supply Voltage Boost Fault
Sensor Circuits Resistance to Ground or Internal Air Bag Diagnostic Monitor Fault
Rapid Continuous Flashing of Air Bag Indicator