F150 Airbag Code 51
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Joined: Mar 2003
Posts: 85
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From: Houston, Tx
After a quick google search, I suspect that you have one or both of the following problems:
You have got an intermittent short to ground somehwere in your air bag system...
And/or
your air bag diagnostic monitor may no longer be operable..
NOTE: I dont think you need not be concerned about the air bag deploying accidentally on you because the thermal fuse in the diagnostic monitor has melted which eliminates power to deploy the air bags.
A google search returned the following passage for a Ford Mustang with the same fault code (I am not responsible for the content):
Fault Code 51 - Diagnostic Monitor Internal Thermal Fuse - Open Due to Intermittent Short To Ground
Description:
NOTE: The microprocessor inside the diagnostic monitor controls the internal thermal fuse. This fuse is not serviceable. The microprocessor will open the thermal fuse whenever a short is detected in the deployment circuits. The thermal fuse does NOT open because of excessive current flowing through it. DO NOT attempt to jumper out the thermal fuse with a circuit breaker or any other type of fuse.
NOTE: DO NOT install a new diagnostic monitor until the short has been located and corrected. If a short to ground has not been located and corrected, then the short to ground is intermittent and IS NOT PRESENT AT THIS TIME. If you install a new diagnostic monitor while there is an intermittent short in the system, the new diagnostic monitor will also open its thermal fuse and require repeat repairs.
If the AIR BAG readiness lamp is flashing a Fault Code 51 and a short to ground has not been serviced, this means that an intermittent short to ground exists in the air bag system. The diagnostic monitor will eventually have to be replaced but only after a visual inspection leads to the repair of a short to ground in the wiring harness.
Michael
You have got an intermittent short to ground somehwere in your air bag system...
And/or
your air bag diagnostic monitor may no longer be operable..
NOTE: I dont think you need not be concerned about the air bag deploying accidentally on you because the thermal fuse in the diagnostic monitor has melted which eliminates power to deploy the air bags.
A google search returned the following passage for a Ford Mustang with the same fault code (I am not responsible for the content):
Fault Code 51 - Diagnostic Monitor Internal Thermal Fuse - Open Due to Intermittent Short To Ground
Description:
NOTE: The microprocessor inside the diagnostic monitor controls the internal thermal fuse. This fuse is not serviceable. The microprocessor will open the thermal fuse whenever a short is detected in the deployment circuits. The thermal fuse does NOT open because of excessive current flowing through it. DO NOT attempt to jumper out the thermal fuse with a circuit breaker or any other type of fuse.
NOTE: DO NOT install a new diagnostic monitor until the short has been located and corrected. If a short to ground has not been located and corrected, then the short to ground is intermittent and IS NOT PRESENT AT THIS TIME. If you install a new diagnostic monitor while there is an intermittent short in the system, the new diagnostic monitor will also open its thermal fuse and require repeat repairs.
If the AIR BAG readiness lamp is flashing a Fault Code 51 and a short to ground has not been serviced, this means that an intermittent short to ground exists in the air bag system. The diagnostic monitor will eventually have to be replaced but only after a visual inspection leads to the repair of a short to ground in the wiring harness.
Michael
Last edited by ms6073; Feb 16, 2004 at 08:39 AM.
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