Nissan Altima 2007-2012 Service Manual:  Power supply, ground & circuit elements coupe

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Cooling fan control
System Diagram System Description INPUT/OUTPUT SIGNAL CHART *1: The ECM determines the start signal status by the signals of engine speed and battery voltage. *2: This signal is sent to ECM through CAN communication line. SYSTEM DESCRIPTION ECM controls cooling fan speed correspondin ...

Diagnosis and repair workflow
Work Flow OVERALL SEQUENCE DETAILED FLOW 1. GET INFORMATION FOR SYMPTOM Get the detailed information from the customer about the symptom (the condition and the environment when the incident/malfunction occurred). >> GO TO 2 2. CHECK DTC 1. Check DTC. 2. Perform the following p ...

Automatic operation
Cooling and/or dehumidified heating (AUTO) This mode may be used all year round as the system automatically works to keep a constant temperature. Air flow distribution and fan speed are also controlled automatically. 1. Press the AUTO button on. The indicator on the button will illuminate. ...