Conditions

B1340





Solar sensor. open circuit/communication error

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

Conditions
The following conditions apply:
- Open circuit or communication error
- The solar sensor sends a continuous identification pulse 5V-OV-5V. The control module searches for identification pulses for periods of 440 ms. 5 consecutive periods without a pulse pattern is required to set a diagnostic trouble code.
- The diagnostic trouble code is deleted after the ignition has been turned on 20 times if the fault conditions have not been fulfilled.
- When the diagnostic trouble code is set, the control module uses a default value. The last valid value is used as a default value. When the ignition is turned on, 0 W/sq.m is used.

Diagnostic help
Check that a value is obtained from all 5 directions.