Nissan Altima 2007-2012 Service Manual: B260A ignition relay

Description

BCM turns ON the following relays to ignition power supply to each ECU when the ignition switch is turned ON.

• Ignition relay-1 (inside IPDM E/R) • Ignition relay-2 (inside fuse box) • Blower fan motor relay

BCM checks any ignition relay ON request for consistency with the actual ignition relay operation status.

DTC Logic

DTC DETECTION LOGIC

NOTE: • If DTC B260A is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to PCS-58, "DTC Logic".

• If DTC B260A is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to PCS-59, "DTC Logic".

• If DTC B260A is displayed with DTC B261A, first perform the trouble diagnosis for DTC B261A. Refer to PCS-75, "DTC Logic".

DTC CONFIRMATION PROCEDURE

1. PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON under the following conditions, and wait for at least 2 seconds.

- CVT selector lever is in the P or N position.

- Release the brake pedal.

2. Check “Self diagnostic result” with CONSULT-III.

Is DTC detected? YES >> Go to PCS-62, "Diagnosis Procedure".

NO >> Inspection End.

Diagnosis Procedure

1. CHECK DTC WITH IPDM E/R

Check “Self diagnostic result” with CONSULT-III. Refer to PCS-45, "DTC Index".

Is DTC detected? YES >> Replace IPDM E/R. Refer to PCS-48, "Removal and Installation".

NO >> GO TO 2

2. CHECK INTERMITTENT INCIDENT

Refer to GI-42, "Intermittent Incident".

>> Inspection End.

    B2553 ignition relay
    Description BCM turns ON the following relays to ignition power supply to each ECU when the ignition switch is turned ON. • Ignition relay-1 (inside IPDM E/R) • Ignition relay-2 (inside f ...

    B2611 ACC relay
    Description BCM turns ON the ACC relay to supply ACC power to each ECU when the power supply position changes to ACC. BCM check ACC relay ON request for consistency with the actual ACC relay ...

    Other materials:

    Power distribution system
    System Description INPUT/OUTPUT SIGNAL CHART SYSTEM DESCRIPTION • PDS (POWER DISTRIBUTION SYSTEM) is the system that BCM controls with the operation of the pushbutton ignition switch and performs the power distribution to each power circuit. This system is used instead of the mechanical ...

    Removal and installation
    ENGINE ASSEMBLY Removal and Installation 1. Torque rod 2. RH engine mounting insulator 3. RH engine mount support 4. Front engine mounting bracket 5. Front engine mounting insulator 6. RH engine mount bracket 7. Lower torque rod bracket 8. Lower torque rod 9. Rear engine mounting insulat ...

    Microphone signal circuit (sedan)
    Description Voice signals are transmitted from the microphone to the Bluetooth control unit using the microphone signal circuits. Diagnosis Procedure 1.CHECK HARNESS BETWEEN BLUETOOTH CONTROL UNIT AND MICROPHONE 1. Turn ignition switch OFF. 2. Disconnect Bluetooth control unit connector an ...