DTC Confirmation Procedure

WARNING: This page is about a different car, the 2019 Nissan NV3500 HD, 2019 Nissan NV2500 HD, and 2019 Nissan NV1500. However, it is still accessible from the selected car via links, so may be relevant.

PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT
1. Turn ignition switch ON.
2. Select "Self Diagnostic Result" mode of "HVAC".
3. Check DTC.
NOTE:
- If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010. Refer to DTC Logic or DTC Logic .
- If there is an open circuit in the ambient sensor, the front air control registers extreme cold [-30 deg. C (-22 deg. F)] and adjusts the temperature control warmer.
Is DTC No. "B257B" or "B257C" displayed?

YES

Perform trouble diagnosis for the ambient sensor. Refer to Diagnosis Procedure .

NO

Inspection End.