Self-Diagnosis Result

WARNING: This page is about a different car, the 2004 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.

Quick reference table

Select a malfunctioning diagnosis No. in the diagnosis result quick reference table.
Find estimated malfunctioning system in the diagnosis No. table and perform check by referring to WIRING DIAGRAM - COMM - .
Turn the ignition switch OFF and perform self-diagnosis again.

SCREEN SWITCH SPECIFICATION

Screen switch

Diagnosis No.

Switch color

DCU⁽¹⁾

Audio unit

NAVI control unit

GPS antenna

Red

Yellow

⁽¹⁾	DCU = Display control unit

CAUTION:

When AV switch has a malfunction, you cannot start.
When display unit has a malfunction, you cannot start.
Check the following when the self-diagnosis mode cannot be used.

AV communication line between display control unit and AV switch. Refer to AV COMMUNICATION LINE CHECK (BETWEEN DISPLAY CONTROL UNIT AND AV SWITCH) .
AV switch power supply and ground circuit. Refer to POWER SUPPLY AND GROUND CIRCUIT CHECK FOR AV SWITCH .
Display communication line between display control unit and display unit. Refer to DISPLAY COMMUNICATION LINE CHECK (BETWEEN DISPLAY CONTROL UNIT AND DISPLAY UNIT) .
Display unit power supply and ground circuit. Refer to POWER SUPPLY AND GROUND CIRCUIT CHECK FOR DISPLAY UNIT .

Self-Diagnosis Codes

POSSIBLE CAUSE

Diagnosis No.	Possible cause	Reference
1	Display control unit malfunction	Refer to REMOVAL AND INSTALLATION OF NAVI CONTROL UNIT .
2	Audio unit power supply and ground circuit. Audio communication line between display control unit and audio unit.	Refer to AV COMMUNICATION LINE CHECK (BETWEEN DISPLAY CONTROL UNIT AND NAVI CONTROL UNIT)
3	NAVI control unit power supply and ground circuit AV communication line between display control unit and NAVI control unit.	Refer to AV COMMUNICATION LINE CHECK (BETWEEN DISPLAY CONTROL UNIT AND NAVI CONTROL UNIT)