Nissan Altima 2007-2012 Service Manual: Diagnosis system (audio unit)
Diagnosis Description
Self-diagnosis mode can check the following items.
• Audio unit hardware/software versions
• Continuity of each speaker channel
• Continuity of each audio unit switch
OPERATION PROCEDURE
1. Turn ignition switch to the ACC position.
2. Turn the audio unit off.
3. While pressing the “AUDIO” button, turn the volume control dial clockwise or counterclockwise 30 clicks or more. When the selfdiagnosis mode is started, a short beep will be heard.
4. Initially, all display segments will be illuminated.
Version Check
1. Press the “AUDIO” switch to enter version diagnostics. “Software” (audio software version) is displayed.
2. Press the “AUDIO” switch again to display the “Hardware” (audio hardware version).
3. Press the “AUDIO” switch again to display the “CD Mech” (CD mechanism version).
4. Press the “AUDIO” switch again to display the “SDARS” (satellite radio version).
Channel Check Diagnostics
When all segments are illuminated, press the “TUNE” up switch to enter channel check diagnostics. The self-diagnostic function will then send a tone to each channel (FL, RL, RR, FR) for 1 second.
Button Check Diagnostics
When all segments are illuminated, press the “TUNE” down switch to enter button check diagnostics. When each audio unit switch is pressed, a tone will sound and the switch name will be displayed.
Audio system (sedan)
System Diagram System Description AUDIO SYSTEM The audio system consists of the following components • Audio unit • Window antenna • Steering wheel audio control switches • Front door ...Other materials:
Exhaust gas (carbon monoxide)
WARNING
● Do not breathe exhaust gases; they
contain colorless and odorless carbon
monoxide. Carbon monoxide is dangerous.
It can cause unconsciousness or
death.
● If you suspect that exhaust fumes are
entering the vehicle, drive with all windows
fully open, and have the vehicl ...
P0850 PNP Switch
Description
When the shift lever position is P or N (CVT), Neutral position (M/T),
park/neutral position (PNP) switch is ON.
ECM detects the position because the continuity of the line (the ON signal)
exists.
DTC Logic
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.INSPECTION START
...
C1729 vehicle speed signal
Description
The vehicle speed signal is not being detected by the BCM.
DTC Logic
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.CHECK SELF-DIAGNOSTIC RESULTS
1. On SELECT DIAG MODE, select the SELF-DIAG RESULT screen.
2. Check display contents on SELF DIAG RESULT screen.
Is the CAN C ...