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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 194 (Heater & Air Conditioning Control System - Automatic Air Conditioner (DTC/Circuit Diagnosis)) >> DTC/Circuit Diagnosis >> DTC B257C: Ambient Sensor >> DTC Description >> DTC Detection Logic

DTC Detection Logic

WARNING: This page is about a different car, the 2018 Nissan Titan XD and 2018 Nissan Titan. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
  • If DTC is displayed along with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to DTC Description .
  • If DTC is displayed along with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to DTC Description .

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

B257B

AMBIENT SENSOR (SHORT)

(Ambient sensor)

Diagnosis condition

When ignition switch is ON.

Signal (terminal)

-

Threshold

More than 100°C (212°F)

Diagnosis delay time

-

B257C

AMBIENT SENSOR (OPEN)

(Ambient sensor)

Diagnosis condition

When ignition switch is ON.

Signal (terminal)

-

Threshold

Less than -42°C (-44°F)

Diagnosis delay time

-