Monitoring function - electrical diagnosis of the DC motor lines
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2008 BMW Z4, 2008 BMW X5, 2008 BMW X3, 2008 BMW 528xi, and 2008 BMW 528i. However, it is still accessible from the selected car via links, so may be relevant.
P1047, P1048, P1049
Is performed internally in order to detect the following errors: Short circuit to battery (SCVB), to ground (SCG) or short circuit to each other (S together):
The goal of this function is to detect a short circuit at the VVL output stage. The function uses temperatures from the sensor outputs of the power stage. If the temperature of one power stage is greater than a threshold the function checks the output stage. If a short circuit is detected an error is set.
Error Symptoms:
ERROR SYMPTOMS
| short circuit to battery voltage | P1047 |
| short circuit to ground | P1048 |
| short circuit to each other | P1049 |