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Home >> Infiniti >> 2015 >> QX80 Base, AWD >> Repair and Diagnosis >> Accessories & Equipment >> Anti-Theft Systems >> Security Control System >> DTC/Circuit Diagnosis >> DTC B20A0: Cranking Request Circuit >> DTC Logic >> DTC Detection Logic
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DTC Detection Logic

NOTE:
  • DTC B20A0 can be detected although the related circuit is not used in this vehicle.
  • If DTC B20A0 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to DTC LOGIC .
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
B20A0 CRANK REQ CIR SHORT When the following items do not match, a malfunction is detected.
  • Cranking request signal from ECM
  • Starter control relay control signal from ECM (CAN)
  • Harness or connectors

    (CAN communication line is open or shorted.)

  • Harness or connectors

    (Cranking request signal circuit is open or shorted.)

  • IPDM E/R
  • ECM

DTC CONFIRMATION PROCEDURE

  1. PERFORM DTC CONFIRMATION PROCEDURE

    1. Start engine and wait 1 second or more at idle speed.
    2. Drive vehicle for 1 second or more.
    3. Check DTC in "Self Diagnostic Result" mode of "IPDM E/R" using CONSULT.

    Is DTC detected?

    YES 

    Refer to DIAGNOSIS PROCEDURE .

    NO 

    INSPECTION END

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