A mileage of about 15,000 km, assembly CEA1.8TSi engine, equipped 0AM 7-speed dual-clutch transmission in 2013 developed new Volkswagen Passat sedan. Users report: auto airbag fault light alarm.
Inspection and evaluation: upkeep workers get started the engine idling and observed fault airbag warning light over the instrument cluster, fault description is consistent using the consumer. Upcoming, use a automobile fault diagnostic vas 5054a checks Gateway installation failures of your record, locate the airbag malfunction. Fault codes and their meanings examine the airbag handle unit, uncovered a fault code B100A1 B, meaning: the front passenger side airbag detonation device resistance worth is too substantial (energetic / static).
Select measurement reading through perform, see the front passenger side airbag igniter resistance and uncovered to eight.6Ω, the current state is high. Meaning by reading the fault code and also the measured value with the state to find out the presence from the front passenger side airbags resistance worth is also high, the attainable reason for the malfunction has an airbag management unit to your harness exists involving virtual access, leading to resistance is too substantial; airbag handle unit and itself is defective.
After a check out circuit, learned to harness the airbag management unit is only one plug connection involving the position of your appropriate front seat suitable in front. If the airbag itself is faulty, unplug see launch x431 iv greater resistance worth of strain. Unplug verify the resistance worth of 5.8Ω, the resistance value decreases, indicating that the airbag itself will not be faulty, the cause could be a problem together with the wiring harness or handle unit.
Airbag manage unit plug pin front passenger side airbag is T50 / four and T50 / 5, T50 / four corresponding wire colour green, T50 / 5 corresponding wire color is white. Driver side airbag stitch T50 / 6 and T50 / seven, the T50 / 4, T50 / five, the wire harness T50 / six and T50 / seven of the handle unit is removed through the plug, T50 / 4 and T50 / 7 harness mutual adjust, T50 / five with T50 / 6 harness interchangeable. Check the front passenger side airbag detonation device resistance is 2.3Ω, driver’s side airbag device detonated resistance is five.3Ω, existing status show thoroughly. While the current state is normal, but the driver’s side and passenger side detonate a device quite distinctive resistance values??, indicating the presence of virtual accessibility harness, manage unit just isn’t faulty. Mainly because fault with the wiring harness transfer, continues to be ruled out right up until the airbag fault itself.
Measuring T50 / 4 pin wiring harness and resistance among T3h / two value of three.5Ω, T50 / five pin harness and resistance involving T3h / 1 is 1Ω. A harness regular resistance worth should be much less than 0.5Ω, indicate the existence of virtual access harness. After the wire harness during the dashboard, visual handle unit close to the wiring digiprog 3 harness will not be restored phenomenon. Apart carpet beneath the appropriate front seat and found the harness has restored phenomenon. Demolition restored harness, located virtual access. Restored harness, measure the resistance worth of 0.5Ω. The airbag handle unit plugs and detonated the gadget plug connection is superior, check the front passenger side on the detonating device resistance is two.3Ω.
Troubleshooting: fix connected wiring harness, troubleshooting.
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