Operation CHARM: Car repair manuals for everyone.

NBS Output 1 Shorted to Battery

Test 1:




Tests 2 - 3:




SYMPTOM
NBS OUTPUT 1 SHORT TO BATT

WHEN MONITORED
With the ignition ON and the Radio ON.

SET CONDITION
The FCM detects excessive current when attempting to close the NBS relay.

POSSIBLE CAUSES
- Check DTCS
- NBS relay shorted
- NBS relay control circuit shorted to battery
- Front control module