Checking the Sensor's Grounding

Checking the Sensor's Grounding







Unplug the connector
- Intake air temperature sensor (407)












- Connect test lamp 86 11 857 to B+ and pin 2 of the female connector.







- The test lamp should light.

Checking the wiring harness.
Jiggle the leads and in-line connectors at several places and in different directions to reveal intermittent breaks and short circuits in the wiring harness. Observe the multimeter, test lamp or diagnostic tool while doing this.

Is the function correct?

NO -

YES -