B2380

B2380

Circulation Pump. Short To B+

Circulation Pump. Open Circuit / Short to Ground







Fault symptoms
Experienced cabin temperature is too low when compared to the set temperature.

Conditions
The following conditions apply:
- A short to B+ is indicated when the output for the circulation pump is activated and the voltage on pin 23 exceeds 6 V.
- A short to ground is indicated when the output for the circulation pump is not activated and the voltage on pin 23 exceeds 6 V.
- Measured every 440 ms and 5 consecutive measurements are required to set a diagnostic trouble code.
- The diagnostic trouble code is cleared after the ignition has been turned on 20 times and the malfunction conditions have not been fulfilled.
- When the diagnostic trouble code has been set the output is switched off.

[Fault Diagnosis Procedure (1999;2000;2001;2002;2003;2004;2005)]