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Old 08-29-2005, 21:23   #1 (permalink)
ata
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Location: upstate ny
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Question 03 Taurus Airbag Light On ( Code 42 )

Hi all
I have a 03 Taurus SE. When I start the car the airbag light blinks four times, pauses, blinks two times, repeats the cycle a couple of times and then stays on solid. I'm assuming it should be some sort of airbag code 42 and was wondering to see if I could find it out without paying the dealer $90 and have my mechanic replace the part. Any help greatly appreciated. Thanks in advance.
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Old 09-02-2005, 07:39   #2 (permalink)
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Re: 03 Taurus Airbag Light On ( Code 42 )

Don't see a listing for a 42 fault. Could you mean a 24 see below.

Retrieving Lamp Flash Codes (LFC)

The air bag Electronic Crash Sensor (ECS) module illuminates the AIR BAG indicator for approximately six seconds when the ignition switch is turned to RUN and then turns the AIR BAG indicator off. This indicates that the AIR BAG indicator is operational. If the AIR BAG indicator does not illuminate at all, stays on continuously or flashes at any time, then a fault has been detected by the ECS.
Lamp Fault Codes (LFCs) , if present, will begin flashing approximately 30 seconds after the ignition switch has been turned to RUN. This is the amount of time it takes the ECS to perform all tests and verify system faults, if present.
LFCs are displayed as a series of flashes and pauses of the AIR BAG indicator. LFCs are two-digit numbers.
Example: An LFC 32 is displayed as follows:
flash flash flash - (two second pause) -
flash flash - (five second pause)...
flash flash flash - (two second pause) -
flash flash - (five second pause)...



LFCs are prioritized numerically so that if two or more faults occur at the same time, the LFC with the highest priority will be displayed.
After the LFC is displayed five times, the air bag indicator will illuminate continuously until the ignition switch is cycled.
The ECS incorporates Non-Volatile Random Access Memory (NVRAM) to store Diagnostic Trouble Codes (DTCs) and retain them for 254 key cycles . The ECS will always display the highest priority DTC stored in NVRAM. DTCs may be cleared from the ECS after the fault conditions are serviced.
If a system fault exists and the air bag warning indicator is not functioning, an audible chime will be heard indicating a need for service. The chime is a series of five sets of five beeps. This does not indicate an LFC 55 or any other DTC. The air bag warning indicator must be serviced before LFCs can be determined.



FAULT 24

B: LFC 24/DTC B1342 - ECS Module Internal Fault

Normal Operation
The air bag Electronic Crash Sensor (ECS) module monitors the back-up power supply, accelerometer operation and memory. If the ECS detects a failure in any of these components, it will store a Diagnostic Trouble Code (DTC) B1342 in memory and flash a Lamp Fault Code (LFC) 24 on the air bag indicator.

Possible Causes
An ECS module internal fault could be caused by:


the internal accelerometer not operating correctly.
the back-up power supply not operating correctly.
an internal module circuit fault detected.
a micro controller RAM/ROM/EEPROM failure.
Pinpoint Test Steps:

B1-B2
Attached Images
File Type: gif Airbag Fault 24.gif (18.2 KB, 178 views)
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Old 09-02-2005, 19:41   #3 (permalink)
ata
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Location: upstate ny
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Re: 03 Taurus Airbag Light On ( Code 42 )

Quote:
Originally Posted by 99CTSABLE
Don't see a listing for a 42 fault. Could you mean a 24 see below.

Retrieving Lamp Flash Codes (LFC)

The air bag Electronic Crash Sensor (ECS) module illuminates the AIR BAG indicator for approximately six seconds when the ignition switch is turned to RUN and then turns the AIR BAG indicator off. This indicates that the AIR BAG indicator is operational. If the AIR BAG indicator does not illuminate at all, stays on continuously or flashes at any time, then a fault has been detected by the ECS.
Lamp Fault Codes (LFCs) , if present, will begin flashing approximately 30 seconds after the ignition switch has been turned to RUN. This is the amount of time it takes the ECS to perform all tests and verify system faults, if present.
LFCs are displayed as a series of flashes and pauses of the AIR BAG indicator. LFCs are two-digit numbers.
Example: An LFC 32 is displayed as follows:
flash flash flash - (two second pause) -
flash flash - (five second pause)...
flash flash flash - (two second pause) -
flash flash - (five second pause)...



LFCs are prioritized numerically so that if two or more faults occur at the same time, the LFC with the highest priority will be displayed.
After the LFC is displayed five times, the air bag indicator will illuminate continuously until the ignition switch is cycled.
The ECS incorporates Non-Volatile Random Access Memory (NVRAM) to store Diagnostic Trouble Codes (DTCs) and retain them for 254 key cycles . The ECS will always display the highest priority DTC stored in NVRAM. DTCs may be cleared from the ECS after the fault conditions are serviced.
If a system fault exists and the air bag warning indicator is not functioning, an audible chime will be heard indicating a need for service. The chime is a series of five sets of five beeps. This does not indicate an LFC 55 or any other DTC. The air bag warning indicator must be serviced before LFCs can be determined.



FAULT 24

B: LFC 24/DTC B1342 - ECS Module Internal Fault

Normal Operation
The air bag Electronic Crash Sensor (ECS) module monitors the back-up power supply, accelerometer operation and memory. If the ECS detects a failure in any of these components, it will store a Diagnostic Trouble Code (DTC) B1342 in memory and flash a Lamp Fault Code (LFC) 24 on the air bag indicator.

Possible Causes
An ECS module internal fault could be caused by:


the internal accelerometer not operating correctly.
the back-up power supply not operating correctly.
an internal module circuit fault detected.
a micro controller RAM/ROM/EEPROM failure.
Pinpoint Test Steps:

B1-B2



99CTSABLE thanks for the detailed info. But it seems like in order to pinpoint the problem one would need one of those several thousand dollar tools. Plus you would need that tool again to reset the system after replacing the defective part. But, once again thank you for taking the time to give me some info.
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Old 09-07-2005, 19:34   #4 (permalink)
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Re: 03 Taurus Airbag Light On ( Code 42 )

If still under warranty, take it to the dealer. There is probably a Passenger Restraint Warranty for 5years/50,000 miles.
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Old 05-01-2008, 12:57   #5 (permalink)
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Re: 03 Taurus Airbag Light On ( Code 42 )

Error code 42, ok, there is a sensor right above the radiator, right behind the hood latch, its a small black box with wires coming out on the passenger side. You will see a white 4 pin connector, make sure its connected, clean it out reconnect it.

This is the case for my 1995 Ford Taurus SHO. Not sure if it in the same place on non-sho models/year. The body style has changed a lot from 95-03.

It should be in about the same location.
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