Jetta Sedan L5-2.5L (BGP) (2005)
Low Tire Pressure Indicator: Description and Operation
Tire Pressure Monitoring indicator
General Information
The tire pressure monitoring indicator system is a component of software in ABS Control Module J104. The system detects slow to very slow losses
of tire pressure. DTC entries for tire pressure monitoring indicator are stored in the ABS control module. ABS control module compares wheel speed
and determines the rolling circumference via tire size. If the rolling circumference of a wheel changes, the Tire Pressure Monitoring Display Indicator
Lamp K220 lights up in the instrument cluster. Rolling circumference of a tire may change due to:
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Insufficient tire pressure
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Structural damage on tires
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Load on vehicle on one side
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High load on one axle, when towing trailer for example
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When snow chains are used
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When spare wheel is installed
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One wheel is replaced
System malfunction in ABS system
If a DTC entry is stored in DTC memory of ABS Control Module J104, this is displayed by a continuously lit yellow tire pressure monitoring
indicator lamp - arrow - in conjunction with ASR/ESP Control Lamp K155 or Traction Control Indicator Lamp K86 in the instrument cluster.
Indicator lamp cannot be turned off by pressing Tire Pressure Monitoring Display Button E492. In this case, perform these steps:
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Connect Diagnostic operation system VAS 5051 and select "Guided Fault Finding".
Suspension
Brake System
01-OBD Capable Systems
03-Brake Electronics Mark 60 or Mark 70
J104 ABS Control Module Function
Check Tire Pressure indicator
Performing basic setting
After every change at wheels, the button SET - 2 - must be pressed with ignition switched on and vehicle standing still until a signal tone sounds. The
signal tone confirms the basic setting.