Unable to Operate All of A/C and AV Switch (Unable to Start Self-Diagnosis)

WARNING: This page is about a different car, the 2005 Infiniti FX45 and 2005 Infiniti FX35. However, it is still accessible from the selected car via links, so may be relevant.

CHECK POWER SUPPLY AND GROUND CIRCUIT
Check power supply and ground circuit. Refer to "POWER SUPPLY AND GROUND CIRCUIT CHECK FOR A/C AND AV SWITCH ".

OK or NG
1. OK : GO TO 2.
2. NG : Check the malfunctioning parts.
A/C AND AV SWITCH SELF-DIAGNOSIS
A/C and AV switch self-diagnosis. Refer to "A/C AND AV SWITCH SELF-DIAGNOSIS FUNCTION ".

OK or NG
1. OK : GO TO 3.
2. NG : Check the malfunctioning parts.
CHECK COMMUNICATION LINE
Check communication line. Refer to "AV COMMUNICATION LINE CHECK (BETWEEN DISPLAY CONTROL UNIT AND A/C AND AV SWITCH) ".

OK or NG
1. OK : Replace A/C and AV switch.
2. NG : Replace display control unit.