Question about 1994 Mercury Grand Marquis

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I have code 51 flashing. Where is the air bag diagnostic module located?

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  • Anonymous Mar 28, 2014

    module need replaced

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Hi, the code 51 flashing means that the internal fuse is blown and the short to ground is no longer present. If the short to ground returns, the code will change to 13 (air back circuit shorted to ground) or 14 (primary crash sensor circuit shorted to ground), but it will only flash 13 or 14 when the short is present. If the code remains 51, then first find and repair short before replacing the diagnostic monitor (what people call air bag module).
Take care

Posted on Aug 03, 2010

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2006 lincoln town car air bag light is on 5 beeps 5 times


The five beeps - five times would indicate a code 55 , but factory service info only goes to code 53 .

  • Audible tone - DTCs retrieved
  • Air bag SRS system fault
  • REFER to DTC Priority Table.

Did your air bag light flash at all ? Apparently this will do flash the air bag light codes as well .
Symptom Chart Condition Possible Sources Action
  • Air bag warning indicator is illuminated continuously
  • Fuse
  • Damaged wiring, terminals or connectors
  • A faulty diagnostic connector
  • A faulted RCM
  • A faulty instrument cluster
  • Go To Pinpoint Test A .
  • Air bag indicator flashing
  • Air bag/pretensioner supplemental restraint system (SRS) fault
  • REFER to DTC Priority Table.
  • Audible tone - DTCs retrieved
  • Air bag SRS system fault
  • REFER to DTC Priority Table.
  • No communication with the restraints control module (RCM)
  • Fuse
  • Diagnostic tool
  • Data link connector (DLC)
  • A faulted RCM
  • Circuitry
  • Go To Pinpoint Test V .
LFC - light flash codes .
Restraints Control Module (RCM) Diagnostic Trouble Code (DTC) Table
DTC a LFC b Description Action To Take - Continuous The Air Bag Indicator is Illuminated Continuously, RCM Disconnected or Inoperative, Loss of Battery Feed, or Loss of Signal Ground Go To Pinpoint Test A . B1231 13 Crash Data Memory Full Install a new RCM and impact sensors. REFER to Inspection and Repair After a Supplemental Restraint System (SRS) Deployment . B1317 Continuous Battery Voltage High CHECK battery voltage; to be below 16 volts. REFER to Section 414-01 . B1318 Continuous Battery Voltage Low CHECK battery voltage; to be above 9.0 volts. REFER to Section 414-01 . B1342 12 RCM Is Faulted Install a new RCM. B1869 NONE
Continuous lamp
Secondary air bag warning sounds if another fault is present Lamp Air Bag Warning Indicator Circuit Open or Short to Ground Go To Pinpoint Test B . B1870 NONE
Secondary air bag warning sounds if another fault is present Air Bag Warning Indicator Circuit Short to Battery Go To Pinpoint Test C . B1891 53 Air Bag Tone Warning Indicator Circuit Short to Battery Go To Pinpoint Test D . B1892 53 Air Bag Tone Warning Indicator Circuit Open or Short to Ground Go To Pinpoint Test E . B1921 14 Air Bag Diagnostic Monitor Ground Circuit Open Go To Pinpoint Test F . B2292 33 Restraint System - Safety Belt Pretensioner Fault (Driver Pretensioner Circuit Fault) Go To Pinpoint Test G . B2292 34 Restraint System - Safety Belt Pretensioner Fault (Passenger Pretensioner Circuit Fault) Go To Pinpoint Test G . B2293 19 Restraint System - Air Bag Fault (Driver Front Air Bag Circuit Fault) Go To Pinpoint Test H . B2293 21 Restraint System - Air Bag Fault (Passenger Front Air Bag Circuit Fault) Go To Pinpoint Test H . B2294 24 Restraint System - Curtain Fault (Driver Side Air Curtain Circuit Fault) Go To Pinpoint Test I . B2294 25 Restraint System - Curtain Fault (Passenger Side Air Curtain Circuit Fault) Go To Pinpoint Test I . B2295 22 Restraint System - Side Air Bag Fault (Driver Seat Side Air Bag Circuit Fault) Go To Pinpoint Test J . B2295 23 Restraint System - Side Air Bag Fault (Passenger Seat Side Air Bag Circuit Fault) Go To Pinpoint Test J . B2296 42 Restraint System - Impact Sensor Fault (Front Impact Severity Sensor Circuit Fault) Go To Pinpoint Test K . B2296 43 Restraint System - Impact Sensor Fault (Driver Side Front Row Impact Sensor Circuit Fault) Go To Pinpoint Test K . B2296 45 Restraint System - Impact Sensor Fault (Driver Side Second Row Impact Sensor Circuit Fault) Go To Pinpoint Test K . B2296 44 Restraint System - Impact Sensor Fault (Passenger Side Front Row Impact Sensor Circuit Fault) Go To Pinpoint Test K . B2296 46 Restraint System - Impact Sensor Fault (Passenger Side Second Row Impact Sensor Circuit Fault) Go To Pinpoint Test K . B2434 51 Driver Safety Belt Buckle Switch Circuit Short To Ground Go To Pinpoint Test L . B2435 51 Driver Safety Belt Buckle Switch Circuit Resistance Out Of Range Go To Pinpoint Test M . B2438 52 Passenger Safety Belt Buckle Switch Circuit Short To Ground Go To Pinpoint Test N . B2439 52 Passenger Safety Belt Buckle Switch Circuit Resistance Out Of Range Go To Pinpoint Test O . B2477 Continuous Module Configuration Error INSTALL a new RCM. B2691 51 Driver Safety Belt Buckle Switch Circuit Fault Go To Pinpoint Test P . B2692 52 Passenger Safety Belt Buckle Switch Circuit Fault Go To Pinpoint Test Q . C1414 15 Incorrect Module Design Level Go To Pinpoint Test R . C1947 49 Driver Seat Track Position Sensor Circuit Short to Ground Go To Pinpoint Test S . C1948 49 Driver Seat Track Position Sensor Circuit Resistance Out Of Range Go To Pinpoint Test T . C1981 49 Driver Seat Track Position Sensor Circuit Fault Go To Pinpoint Test U . - - No Communication with the Restraints Control Module Go To Pinpoint Test V . Your best bet have codes checked with a scan tool .

Jan 23, 2017 | Lincoln Cars & Trucks

2 Answers

Air bag light flashes code 51.


If your airbag code is blinking, and you get 51, it means that your internal thermal fuse in your airbag computer is blown which is caused by an intermittant short to ground on one of the wires in the circuit. When the short to the ground is removed, code 51 flashes with the use of the airbag warning lamp, 5 flashes, pause, 1 flash, longer pause. According to the Ford, this is a nonrepairable fix, you must buy a new air bag module which is a blue box located in the vicinity of the the steering column.

Apr 10, 2014 | 1994 Ford F150 Styleside Supercab

1 Answer

I have a code 51 blinking air bag light from my 1995 ford taurus. what does this mean


Hi Branda1, It will have to go to a dealer to repair. Air bags are not something you want to do yourself, very dangerous. Here is what code 51 means.. hope this answers your question.. Cobra

Diagnostic Trouble Code 51—Air Bag Diagnostic Monitor Internal Thermal Fuse—Fuse Blown Due to Intermittent Short to Ground Normal Operation
NOTE: The air bag diagnostic monitor contains an internal thermal fuse that is not serviceable. The thermal fuse is controlled by the microprocessor inside the air bag diagnostic monitor . The microprocessor inside the air bag diagnostic monitor will blow the thermal fuse whenever a short on the deployment circuits occurs. The thermal fuse does not blow because of excessive current flowing through it. DO NOT attempt to short circuit the thermal fuse with a circuit breaker or any other type of fuse.

Jul 06, 2010 | 1995 Ford Taurus

1 Answer

Where is the airbag diagnostic module on my 1996 aerostar? getting code 51


The code you have indicates that the internal fuse in the airbag control module has been blown; this happens automatically when a short to ground occurs in one of the airbag circuits in the vehicle. This is a safety feature designed to prevent injuries due to accidental deployment of the airbag due to an electrical fault; the module blows the fuse intentionally to disable the system. the fuse is not serviceable; a new airbag module must be installed after the short to ground has been located and repaired. The air bag diagnostic module is located at the center of the dash panel, below the integrated control panel

Nov 06, 2009 | 1996 Ford Aerostar Extended

2 Answers

What is airbag light code 31 and 51 on a 1994 ford taurus


I was unable to locate code 31 in my book here is a copy of the codes. looks like you just need a fuse for #51. this may fix 31 as well.

Diagnostic Trouble Code Table 1994

AIR BAG DIAGNOSTIC MONITOR DIAGNOSTIC TROUBLE CODE PRIORITY TABLE
Priority Code Component/Fault Description
Highest - No Air Bag Indicator - Inoperative Lamp Circuit or No Ignition
Voltage to Air Bag Diagnostic Monitor

Continuous Air Bag Indicator - Air Bag Diagnostic Monitor
Disconnected or Inoperative
12 Low Battery Voltage
13 Air Bag Circuit Shorted to Ground
14 Primary Crash Sensor Circuit Shorted to Ground
21 Safing Sensor Not Mounted to Vehicle Properly
22 Safing Sensor Output Shorted to Battery Voltage
23 Safing Sensor Circuit Input Feed/Return Circuit Open
24 Safing Sensor Output Feed/Return Circuit Open
32 Driver Side Air Bag Module High Resistance or Open
33 Passenger Side Air Bag Module High Resistance or Open
34 Driver Side Air Bag Module Circuit Low Resistance or Shorted
35 Passenger Side Air Bag Module Low Resistance or Shorted
42 Center Radiator Primary Crash Sensor Feed/Return Open
44 Center Cowl Primary Crash Sensor Not Mounted to Vehicle Properly
45 Center Radiator Primary Crash Sensor Not Mounted to Vehicle Properly
51 Diagnostic Monitor Internal Thermal Fuse - Fuse Blown Due to
Intermittent Short to Ground
52 Backup Power Supply - Voltage Boost Fault
53 Primary Crash Sensor Circuits - Resistance to Ground or Air Bag
Diagnostic Monitor Failure

Lowest - Rapid Continuous Flashing of Air Bag Indicator (No DTC) All Primary

Sep 30, 2009 | 1994 Ford Taurus

1 Answer

Airbag lt on


Hi!

Code 51 means: Air Bag Diagnostic Monitor Internal Thermal Fuse ä Fuse Blown Due to Intermittent Short to Ground. It means that the computer controlling the airbags sensed a short in the wiring and disabled itself by tripping an internal fuse for safety reasons so that the air bag cannot be deployed accidentally. To repair the car, the wiring problem must be fixed, and then the airbag module replaced. Look for smashed wires, wires that are rubbing against bare metal or other wiring damage affecting the airbag circuits. This wiring is all under the plastic cowl around the steering column.

Please do rate the solution as FixYa and revert for further clarification.

Thanks
Rylee

May 30, 2009 | 2003 Ford Taurus

1 Answer

Air bag sensor keeps flashing


If a concern is detected, the air bag control module will communicate by flashing the warning indicator. A diagnostic trouble code (DTC) is logged by the air bag control module in a nonvolatile memory. For additional information, refer to Diagnosis and Testing in this section.
Lamp Fault Codes (LFC)
Item Part Number Description 1 One flash cycle: Driver air bag trouble code 2 Two flash cycle: Passenger air bag trouble code 3 Three flash cycle: Trouble code common to both driver and passenger air bag circuit 4 Four flash cycle: Safety belt pretensioner trouble code common to both driver and passenger pretensioner circuits 5 Five flash cycle: Driver side air bag trouble code 6 Six flash cycle: Passenger side air bag trouble code 7 Not used 8 Not used

Apr 10, 2009 | 2001 Ford Focus

2 Answers

SRS light now repeatedly blinks 5-1 problem code - stop/reset?


Sounds like an air bag problem. You will not be able to reset the light without fixing the problem. The steering wheel airbag electrical contact is suspect. Airbag will have to be removed and problem repaired. . I do not recommend you repair the problem unless qualified.

Mar 12, 2009 | 1998 Lincoln Mark VIII

1 Answer

Instrument Panel Codes??


Yes, it's called a lamp fault code.

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 Component/Fault Description — 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 12 Low Battery Voltage 13 Air Bag Module or RH Cowl Side Panel Air Bag Sensor Circuit Shorted to Ground 21 LH Cowl Side Panel Air Bag Sensor Not Mounted to Vehicle Properly 22 LH Cowl Side Panel Air Bag Sensor Circuit Shorted to Battery Voltage 23 LH Cowl Side Panel Air Bag Sensor Circuit Input Feed/Return Circuit Open 24 LH Cowl Side Panel Air Bag Sensor Diagnostic Circuit Open or Low Resistance in Center Air Bag or Front Air Bag 32 Driver Side Air Bag Circuit High Resistance or Open 33 Passenger Side Air Bag Circuit High Resistance or Open 34 Driver Side Air Bag Circuit Low Resistance or Shorted 35 Passenger Side Air Bag Circuit Low Resistance or Shorted 41 Center Radiator and RH Cowl Side Panel Air Bag Sensor Circuits High Resistance or Open 44 RH Cowl Side Panel Air Bag Sensor Not Mounted to Vehicle Properly 45 Center Air Bag Sensor Not Mounted to Vehicle Properly 46 Open Splice Center Air Bag Sensor Ground Monitor 51 Air Bag Diagnostic Monitor Internal Thermal Fuse Blown and Short to Ground No Longer Exists 52 Backup Power Supply Voltage Boost Fault 53 Sensor Circuits Resistance to Ground or Internal Air Bag Diagnostic Monitor Fault — Rapid Continuous Flashing of Air Bag Indicator

Feb 25, 2009 | 1992 Mercury Sable

1 Answer

Airbag flashes 10 times misses a flash then repeats


Try clearing the codes & see if it returns. I do not see a code fault 10. Starts at 12.

---------------------------------------------------------------------
Section 01-20B: Restraints, Passive — Supplemental Air Bag System 1995 Town Car, Crown Victoria, Grand Marquis Workshop Manual DIAGNOSIS AND TESTING Diagnostic Trouble Code Clearing Procedure to Clear Diagnostic Trouble Codes from Diagnostic Monitor Non-Volatile Random Access Memory.
Normal Operation
The air bag diagnostic monitor (14B056) continually checks the air bag system for readiness. When a fault condition is detected, the DTC associated with that fault is stored in the air bag diagnostic monitor's Non-Volatile Random Access Memory (NVRAM). After writing the DTC to NVRAM, the air bag diagnostic monitor signals the fault by flashing the appropriate diagnostic trouble code on the air bag indicator. The diagnostic trouble code written to NVRAM is permanently stored in the air bag diagnostic monitor until cleared by the diagnostic trouble code clearing procedure.
  • Upon each cycle of the ignition switch (11572) , the air bag diagnostic monitor checks for diagnostic trouble codes written in NVRAM. If any diagnostic trouble codes exist in NVRAM, the air bag diagnostic monitor will then check to see if these fault conditions are still present.
  • If the conditions of the diagnostic trouble code in NVRAM are still present, then the air bag diagnostic monitor will use the air bag indicator to flash out the diagnostic trouble code number that was written in memory.
  • If the conditions of the diagnostic trouble code are not still present (indicating an intermittent or serviced fault), the air bag diagnostic monitor will use the air bag indicator to flash out a DTC which is the sum of the diagnostic trouble code in NVRAM plus 40.
Example: Due to corrosion, high resistance develops on the driver side air bag circuit. The air bag diagnostic monitor stores a diagnostic trouble code 32 in NVRAM. Upon each cycle of the ignition switch , the air bag diagnostic monitor checks the resistance of the driver air bag circuit.
  • If the resistance is still high, the air bag diagnostic monitor causes the air bag indicator to flash out a DTC 32.
  • If the resistance falls within the normal range due to service or an intermittent condition, the air bag diagnostic monitor causes DTC 72 to be flashed on the air bag indicator.
Once a fault has been serviced, the associated diagnostic trouble code may be cleared from NVRAM. Only diagnostic trouble codes that the air bag diagnostic monitor sees as repaired or intermittent may be cleared (diagnostic trouble codes 52 and above). In no circumstances can hard fault conditions (diagnostic trouble codes 45 and below) be cleared.
  1. Follow the diagnostic procedures as outlined to service the fault condition flashing on the air bag indicator.
  1. Cycle the ignition switch to OFF and then to RUN.
  1. Observe air bag indicator prove-out (six ± two seconds) followed by diagnostic trouble code (52-85) flashing completely one time.
  1. Locate the Diagnostic "Trouble Code Clear" Connector located underneath the glove compartment (06010) containing Circuits 631 (T/R) and 57 (BK).
  1. Use a jumper wire to short Circuit 631 (T/R) to Circuit 57 (BK) or to another good ground. This short must be made after the diagnostic trouble code flashes completely one time, but before the warning light stays on continuously.
  1. Hold short until air bag diagnostic monitor tone sounds (approximately five seconds).
  1. Release short on Circuit 631 (TAN/RED STRIPE) to Circuit 57 (BLACK). This short must be released within 25 seconds after the diagnostic monitor tone sounds. Diagnostic trouble code is now cleared from NVRAM. Next highest priority diagnostic trouble code stored in NVRAM (if one exists) will begin flashing.

Feb 09, 2009 | 1995 Lincoln Town Car

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