Nissan Altima (L32) 2007-2012 Service Manual: B26E1 No reception of engine status signal
Description
BCM receives the engine status signal from ECM via CAN communication.
DTC Logic
DTC DETECTION LOGIC
NOTE: • If DTC B26E1 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to SEC-235, "DTC Logic".
• If DTC B26E1 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to SEC-236, "DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON under the following conditions.
- CVT selector lever is in the P or N position.
- Do not depress the brake pedal.
2. Check “Self diagnostic result” with CONSULT-III.
Is DTC detected? YES >> Refer to SEC-309, "Diagnosis Procedure".
NO >> Inspection End.
Diagnosis Procedure
1.INSPECTION START
1. Turn ignition switch ON.
2. Check “Self diagnostic result” with CONSULT-III.
3. Touch “ERASE”.
4. Perform DTC Confirmation Procedure.
See SEC-309, "DTC Logic".
Is the DTC B26E1 displayed again? YES >> GO TO 2
NO >> Inspection End.
2.REPLACE ECM
1. Replace ECM.
2. Refer to EC-1048, "BASIC INSPECTION : Special Repair Requirement" (VQ35DE), EC-560, "BASIC INSPECTION : Special Repair Requirement" (QR25DE except California), EC-24, "BASIC INSPECTION : Special Repair Requirement" (QR25DE California).
>> Inspection End.
B261A push-button ignition switch
Description IPDM E/R transmits the push-button ignition switch status via CAN communication to BCM. BCM receives push-button ignition switch status by hardwire input. BCM compares the 2 signals ...POWER supply and ground circuit
BCM Diagnosis Procedure 1. CHECK FUSE AND FUSIBLE LINK Check if the following BCM fuse or fusible link are blown. Is the fuse or fusible link blown? YES >> Replace the blown fuse or fus ...Other materials:
On board diagnostic (OBD) System
Diagnosis Description
INTRODUCTION
The ECM has an on board diagnostic system, which detects malfunctions related
to engine sensors or actuators.
The ECM also records various emission-related diagnostic information including:
The above information can be checked using procedures listed in t ...
BCM branch line circuit
Diagnosis Procedure
INSPECTION PROCEDURE
1.CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check the terminals and connectors of the BCM for damage, bend and loose
connection (unit side and
connector side).
Is the inspec ...
Refrigerant pressure sensor
Description
The refrigerant pressure sensor is installed at the condenser of the air
conditioner system. The sensor uses an
electrostatic volume pressure transducer to convert refrigerant pressure to
voltage. The voltage signal is sent
to ECM, and ECM controls cooling fan system.
Componen ...