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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 200 (Power Control System (DTC/Circuit Diagnosis)) >> DTC/Circuit Diagnosis >> DTC U1000: Can Comm Circuit >> DTC Description >> Fail-Safe

DTC Description: Fail-Safe

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.

When CAN communication with ECM and BCM is impossible, IPDM E/R performs fail-safe control. After CAN communication recovers normally, it also returns to normal control.

If No CAN Communication Is Available With ECM 

Control part

Fail-safe operation

A/C compressor

A/C relay OFF

If No CAN Communication Is Available With BCM 

Control part

Fail-safe operation

Headlamp

  • Turns ON the headlamp low relay when the ignition switch is turned ON.
  • Turns OFF the headlamp low relay when the ignition switch is turned OFF.
  • Headlamp high relay OFF
  • Parking lamp
  • License plate lamp
  • Illumination
  • Tail lamp
  • Side marker lamp
  • Turns ON the tail lamp relay when the ignition switch is turned ON.
  • Turns OFF the tail lamp relay when the ignition switch is turned OFF.

Front wiper motor

  • The status just before activation of fail-safe control is maintained until the ignition switch is turned OFF while the front wiper is operating at LO or HI speed.
  • The wiper is operated at LO speed until the ignition switch is turned OFF if the fail-safe control is activated while the front wiper is set in the INT mode and the front wiper motor is operating.
  • Returns wiper automatically to stop position when ignition switch is turned ON if fail-safe control is activated while front wiper motor is operated and the wiper is in any position other than the stop position.
  • The status is held at service position if the fail-safe control is activated while the service position function is operating.

Front fog lamp

Front fog lamp relay OFF

Horn

Horn relay OFF

Ignition relay-1

The status just before activation of fail-safe is maintained.

Starter motor

Starter control relay OFF