B2380

B2380

Circulation Pump. Short to B+

Circulation Pump. Open Circuit / Short to Ground







Fault symptoms
Perceived temperature in cabin too low compared to the set temperature.

Conditions
The following conditions apply:
- Ignition ON
- Short circuit to B+ indicated when the output for the circulation pump is activated and the voltage on pin 15 exceeds 6 V.
- Short circuit to ground is indicated when the output for the circulation pump is not activated and the voltage on pin 15 exceeds 6 V.
- Measured every 50 ms.
- The diagnostic trouble code is deleted after the ignition has been switched on 20 times if the malfunction conditions have not been fulfilled.
- When the diagnostic trouble code is generated the output is switched off.

Fault Diagnosis Procedure