Nissan Altima 2007-2012 Service Manual: Function diagnosis

Mixture ratio self-learning value clear
Description This describes how to erase the mixture ratio self-learning value. For the actual procedure, follow the instructions in “Diagnosis Procedure”. Special Repair Requirement 1.START ...

Engine control system
System Diagram System Description ECM performs various controls such as fuel injection control and ignition timing control. Component Parts Location 1. Intake valve timing control solenoid ...

Other materials:

Front fog lamp circuit
Description The IPDM E/R (intelligent power distribution module engine room) controls the front fog lamp relay based on inputs from the BCM over the CAN communication lines. When the front fog lamp relay is energized, power flows from the front fog lamp relay in the IPDM E/R to the front fog ...

P1421 Cold start control
Description ECM controls ignition timing and engine idle speed when engine is started with pre-warming up condition. This control promotes the activation of three way catalyst by heating the catalyst and reduces emissions. DTC Logic DTC DETECTION LOGIC NOTE: • If DTC P1421 is displayed ...

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 ...