Nissan Altima 2007-2012 Service Manual: Component diagnosis

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 d ...

Trouble diagnosis - specification value
Description The specification (SP) value indicates the tolerance of the value that is displayed in “SPEC” of “DATA MONITOR” mode of CONSULT-III during normal operation of the Engine Contr ...

Other materials:

The fuel gauge pointer does not move
Description Fuel gauge needle will not move from a certain position. Diagnosis Procedure 1.CHECK COMBINATION METER INPUT SIGNAL 1. Select “METER/M&A” on CONSULT-III. 2. Using “FUEL METER” of “DATA MONITOR”, compare the monitor value with the fuel gauge reading on the combi ...

Audio unit
Diagnosis Procedure 1.CHECK FUSES Check that the following fuses are not blown. Are the fuses OK? YES >> GO TO 2 NO >> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse. 2.POWER SUPPLY CIRCUIT CHECK 1. Disconnect audio unit connector M43. ...

Automatic speed control device (ASCD)
System Diagram System Description INPUT/OUTPUT SIGNAL CHART *: This signal is sent to the ECM through CAN communication line BASIC ASCD SYSTEM Refer to Owner's Manual for ASCD operating instructions. Automatic Speed Control Device (ASCD) allows a driver to keep vehicle at predetermin ...