Background

Ross-Tech HEX-V2 ODB2-USB interface

The New Beetle’s CAN-Bus diagnostic system outputs generic codes for engine ECU operations, but proprietary VW codes for many ancillary systems like airbags and ABS braking. A special code reader like the Ross-Tech VCDS HEX-V2 is required to go beyond engine-specific information. Volkswagen dealers have a dedicated VAS diagnostic tester that is even more detailed than the handheld Ross-Tech products.

Unless codes are scanned with proprietary equipment, the results will come back “clean” and that’s exactly what our used car dealer reported (he was honest by the way). This means the engine is operating to specification, but other possible issues may exist.

We duplicated the dealer’s “clean” report with our own generic ODB2 reader.

VCDS diagnostic process

However, when we hooked up the VCDS HEX-V2 USB interface to a Windows PC, more information was displayed. Specifically, two troubling airbag system codes:

01739 – Crash Sensor for Front Airbag; Pass. Side (G284)
      004 – No Signal/Communication – Intermittent
01738 – Crash Sensor for Front Airbag; Drivers Side (G283)
      004 – No Signal/Communication – Intermittent

Ross-Tech provides a free wiki to help correct code errors. Searching for “01738” found that Volkswagen recalled the airbag sensors for our 2004 Turbo S model back in September 2008. Happily, this free repair remains valid even after all these years!

The VCDS also found one additional fault:

00932 – Electric Window Motor: Drivers Side (V147)
  62-00 – No or Incorrect Adjustment

The Ross-Tech wiki suggested this course of action: