I have an audi a4 2003 tdi airbag light is on , i pluged in the launch x431 and got the fault - drivers sider crash sensor.
so is it a connection prob or more likely the sensor, so should i get a sensor and change it
and what the procedure for changing it safely
regards jonathan
SOURCE: how do i change my fan belt on an audi a4 19 tdi
i just replaced 1 yesterday your best option is to remove the headlights, bumper, you will see 3 torx bolts both sides holding complete front section, remove air conditioning rad pull round to right hand side without losing pipes, the front section should pull round to the left a little prope with axle stand. draw out a digram of witch way the belt goes round all pulleys. to the left of the water pump (big fan wheel) is the tensioner, to slacken place 15mm spanner on bolt and pull anticlockwise.
SOURCE: A4 airbag sensor
A4s are known for airbag lights due to the bag in the side of the driver's seat. The yellow connector under the seat gets stretched and opens up partially if you move the seat too far. It's just a quick opening but it's enough to trip the light. In mine, I ziptied the connector tightly together, then turned off the light (you need the VagCom diagnostic software for this).
SOURCE: How to set the time and date on an Audi A4 1.9 TDI
For time and date settings you must try the follows:
1. On the instrument cluster display you will find two small buttons at the bottom side. The left button is provided for time and date settings.
2. Pull the button once and you will see the "hour" number in pulse mode. Then turn the button finely on the right side step by step until you set up the "hour" number. When you finished the "hour" number setting you must pull once again the button until the "minute" number come in pulse mode.
3. Now turn the button finely on the right side step by step until you set up the "minute" number. When you finished the "minute" number setting you must pull once again the button until the "day" number come in pulse mode.
4. In the same mode you will set up also the "month" and the "year" numbers. After all settings you must waiting few seconds until display no more pulsing.
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SOURCE: I have a Audi A4 1.9 tdi 1997, the fan belt has
it a bit of a simple drawing but thats how it go's hope this helps
SOURCE: FITTING FAN BELT ON AUDI
The serpentine belt diagram for Audi A4 1.9 TDI:
CS = Crankshaft
F = Fan pulley
Gen = Alternator
T = Tensioner
AC = Air Conditioning
PAS = Power Assisted Steering
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 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 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=RH Primary Crash Sensor Feed/Return Circuit Open
42=LH Primary Crash Sensor Feed/Return Circuit Open
44=RH Primary Crash Sensor Not Mounted to Vehicle Properly
45=LH Primary Crash Sensor Not Mounted to Vehicle Properly
51=Air Bag Diagnostic Monitor Internal Thermal FuseFuse Blown Due to Intermittent Short to Ground
52=Backup SupplyVoltage Boost Fault
53=Primary Crash Sensor Circuits Resistance to Ground or Air Bag Diagnostic Fault
Hope this helps...
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