Nissan Murano: Dtc/circuit Diagnosis / B26f1 Ign Relay Off

Nissan Murano (Z52) 2015-2024 Service Manual / Electrical & Power Control / Power Control System :: Power Distribution System / Dtc/circuit Diagnosis / B26f1 Ign Relay Off

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms (Trouble diagnosis content) DTC Detection Condition
B26F1

IGN RELAY OFF

(Ignition relay off) 		Diagnosis condition When ignition switch ON.
Signal (terminal) IPDM E/R ignition output 1 (Terminal 70)
Threshold Less than 8.8V or more than 16.5V
Diagnosis delay time 2 seconds or more

POSSIBLE CAUSE

  • Harness or connectors

    (Ignition relay circuit is open)

  • BCM

  • IPDM E/R

FAIL-SAFE

Inhibit engine cranking.

DTC Confirmation Procedure

PERFORM DTC CONFIRMATION PROCEDURE

CONSULT

  1. Ignition switch ON under the following conditions, and wait for 2 seconds or more:

    • CVT selector lever is in the P (park) or N (neutral) position.

    • Do not depress brake pedal.

  2. Select “Self Diagnostic Result” mode of “BCM”.

  3. Check DTC.

Is DTC detected?

YES>>

Refer to DTC Diagnosis Procedure.

NO>>

Inspection End.

DTC Diagnosis Procedure

CHECK SELF DIAGNOSTIC RESULT FOR IPDM E/R

CONSULT

  1. Select “Self Diagnostic Result” mode of “IPDM E/R”.

  2. Erase DTCs.

  3. Ignition switch OFF.

  4. Ignition switch ON.

  5. Select “Self Diagnostic Result” mode of “IPDM E/R”.

Are any DTCs detected?

YES>>

Refer to DTC Index.

NO>>

GO TO 2.

CHECK IGNITION RELAY (IPDM E/R) CONTROL SIGNAL

Check voltage between BCM harness connector and ground.

BCM — Condition

Voltage

(Approx.)
Connector Terminal
M19 70 Ground Ignition switch: ON 0 V

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Replace BCM. Refer to Removal and Installation.

CHECK IGNITION RELAY (IPDM E/R) CONTROL SIGNAL CIRCUIT

  1. Ignition switch OFF.

  2. Disconnect BCM connector and IPDM E/R connector E119.

  3. Check continuity between BCM harness connector and IPDM E/R harness connector.

    BCM IPDM E/R Continuity
    Connector Terminal Connector Terminal
    M19 70 E119 43 Yes

Is the inspection result normal?

YES>>

Replace IPDM E/R. Refer to Removal and Installation.

NO>>

Repair or replace harness or connectors.

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