Nissan Rogue (T33) 2021-Present Service Manual: B2fac-14 Accessory Relay

Nissan Rogue (T33) 2021-Present Service Manual / Electrical & Power Control :: Power Control System / Power Distribution System :: Dtc/circuit Diagnosis / B2fac-14 Accessory Relay

DTC Description

DTC DETECTION LOGIC

DTC No.

CONSULT screen items

(Trouble diagnosis content) 		DTC detection condition
B2FAC-14

Accessory relay

(Accessory relay) 		Diagnosis condition When ignition switch is OFF (not auto ACC status)
Signal (terminal) Accessory relay control signal [terminal #30 (with type A meter) or #34 (with type B meter)]
Threshold 0 V
Diagnosis delay time 1 second or more

POSSIBLE CAUSE

  • Harness or connectors (accessory relay control signal circuit is open or shorted to ground)

  • Accessory relay

  • BCM

FAIL-SAFE

—

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

CONSULT

  1. Ignition switch ON.

  2. Ignition switch OFF and wait for 1 minute with the front door LH opened.

  3. Ignition switch ON.

  4. Select “Self diagnosis result” mode of “BCM”.

Is DTC detected?

YES>>

Refer to DTC Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: Inspection End.

DTC Diagnosis Procedure

CHECK ACCESSORY RELAY CONTROL SIGNAL VOLTAGE

  1. Ignition switch OFF.

  2. Disconnect BCM connector.

  3. Check voltage between BCM harness connector and ground.

    With type A meter
    + -

    Voltage

    (Approx.)
    BCM
    Connector Terminal
    M51 30 Ground Battery voltage
    With type B meter
    + -

    Voltage

    (Approx.)
    BCM
    Connector Terminal
    M18 34 Ground Battery voltage

Is the inspection result normal?

YES>>

Replace BCM. Refer to Removal and Installation.

NO>>

GO TO 2.

CHECK ACCESSORY RELAY CONTROL SIGNAL CIRCUIT (OPEN)

  1. Disconnect accessory relay connector.

  2. Check continuity between BCM harness connector and accessory relay harness connector.

    With type A meter
    BCM Accessory relay Continuity
    Connector Terminal Connector Terminal
    M51 30 J-5 1 Yes
    With type B meter
    BCM Accessory relay Continuity
    Connector Terminal Connector Terminal
    M18 34 J-5 1 Yes

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair the harness or connector.

CHECK ACCESSORY RELAY CONTROL SIGNAL CIRCUIT (SHORT TO GROUND)

Check continuity between BCM harness connector and ground.

With type A meter
BCM — Continuity
Connector Terminal
M51 30 Ground No
With type B meter
BCM — Continuity
Connector Terminal
M18 34 Ground No

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair the harness or connector.

CHECK ACCESSORY RELAY

Check accessory relay. Refer to Component Inspection.

Is the inspection result normal?

YES>>

Inspection End.

NO>>

Replace accessory relay.

Component Inspection

CHECK ACCESSORY RELAY

  1. Ignition switch OFF.

  2. Disconnect accessory relay connector.

  3. Check continuity between accessory relay terminals.

Accessory relay Condition Continuity
Terminal
12 V direct current supply between terminals and . Yes
No current supply No

Is the inspection result normal?

YES>>

Inspection End.

NO>>

Replace accessory relay.

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