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Home >> Volkswagen >> 2001 >> Jetta GL, 2.0 B >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 38 (1.9L - Fuel Injection Glow Plug, Engine Code: ALH (A4 Platform)) >> 23 Diesel Fuel Injection >> Additional signals, checking >> A/C system signals, checking >> Compressor shut-off, checking

Compressor shut-off, checking

WARNING: This page is about a different variant/trim than selected.

The A/C control head signals the Engine Control Module (ECM) J248 that the A/C compressor will be switch on, via the A/C compressor signal.

Using the same wiring, the A/C compressor is switched off by the ECM under the following circumstances:

NOTE:
  • Hard acceleration from low speed
  • In emergency program (limp mode)
  • Engine Coolant Temperatures exceeds + 120 ° C (248 ° F)
  • After every engine start for approx. 6 seconds.
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