Nissan Altima 2007-2012 Service Manual: ECU diagnosis

Sound signal circuit (sedan)
SATELLITE RADIO TUNER Description Left and right channel audio signals are supplied from the satellite radio tuner to the audio unit through the sound signal circuits. Diagnosis Procedure LEF ...

Audio unit (coupe)
Reference Value TERMINAL LAYOUT PHYSICAL VALUES Wiring Diagram — Coupe ...

Other materials:

Power control system
System Diagram System Description COOLING FAN CONTROL IPDM E/R controls cooling fans according to the status of the cooling fan speed request signal received from ECM via CAN communication. Refer to LAN-7, "System Description". GENERATOR CONTROL IPDM E/R outputs power generation ...

Microphone
Diagnosis Procedure 1.CHECK POWER SUPPLY CIRCUIT (MICROPHONE SIDE) Check voltage between microphone harness connector and ground. Is proper voltage present? YES >> GO TO 4 NO >> GO TO 2 2.CHECK POWER SUPPLY CIRCUIT (CONTINUITY) 1. Turn ignition switch OFF. 2. Disconnect Blu ...

Communication signal circuit (sedan) satellite radio tuner
 Description Communication signals are exchanged between the audio unit and satellite radio tuner using the communication circuits.  Diagnosis Procedure 1.CHECK HARNESS - 1 1. Turn ignition switch OFF. 2. Disconnect satellite radio tuner (factory installed) connector B123 and au ...