Nissan Altima B2562 Low Voltage

DTC Logic and Confirmation Procedure

DTC Logic (From Service Manual)

The Diagnostic Trouble Code (DTC) Logic involves a systematic approach to identifying low voltage issues in the Body Control System (BCM).

DTC Confirmation Procedure (From Service Manual)

  1. DTC Confirmation:
    • Erase DTC.
    • Turn ignition switch OFF.
    • Perform the “SELF-DIAG RESULTS” of CONSULT-III after the ignition switch has been turned ON for 1.5 seconds or more.
  2. Diagnosis Procedure:
    • Check Battery Voltage:
      • If battery voltage is less than 8.8V, charge the battery and retest.
      • If not, proceed to the next step.
    • Check Power Supply Circuit:
      • Examine BCM power supply circuit. Refer to BCS-42 in the Service Manual for the diagnosis procedure.
      • If the circuit is OK, replace BCM. Refer to BCS-96 for removal and installation.
      • If the circuit is not OK, repair or replace the malfunctioning part.

Additional Insights (From Battery Low Voltage Code Article)

  • If a B2562 code is present, use the CONSULT tool to determine if the ignition was left in the “ACC” or “ON” position during the battery discharge.
  • The review of Freeze Frame Data (FFD) results will indicate whether the ignition was in the “Lock,” “ON,” or “ACC” position.
  • This information helps in notifying the customer about the probable cause of the “dead battery” condition.

Understanding B2562 Nissan Code

Possible Causes (From Battery Low Voltage Code Article)

  • Faulty Body Control Module
  • Body Control Module harness is open or shorted
  • Body Control Module circuit poor electrical connection

Symptoms and Diagnosis Cost

  • Symptoms:
    • Engine Light ON (or Service Engine Soon Warning Light)
  • Diagnosis Cost:
    • Labor: 1.0 hour
    • The cost varies based on location, vehicle make and model, and engine type, typically ranging between $75 and $150 per hour.

What Does B2562 Nissan Code Mean? (From

The Engine Control Module (ECM) monitors the Power Supply Voltage to the Body Control Module (BCM). The code is set when the power supply voltage to BCM remains less than 8.8 V for 1.5 seconds or more.

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