Only Unit Part Is Displayed In Red.

Screen switch	Description	Possible malfunction location / Action to take
Audio Head Unit	Malfunction is detected in AV control unit power supply and ground circuits.	Check AV control unit power supply and ground circuits. Refer to DIAGNOSIS PROCEDURE . When detecting no malfunction in those components, replace AV control unit. Refer to REMOVAL AND INSTALLATION .
BOSE Amp.	When either one of the following items are detected: Sound signal circuits between BOSE amp. and each speaker are malfunctioning. Sound signal circuits between BOSE amp. and either front or rear microphone are malfunctioning. BOSE amp. malfunction is detected.	Malfunctioning speaker circuits. Malfunctioning front or rear microphone circuits. Replace BOSE amp. Refer to REMOVAL AND INSTALLATION .

Area with yellow connection lines	Description	Possible malfunction location / Action to take
Control Unit ==> Cluster	When either one of the following items are detected: Combination meter power supply and ground circuits are malfunctioning. AV communication circuits between AV control unit and combination meter are malfunctioning.	Combination meter power supply and ground circuits. Refer to DIAGNOSIS PROCEDURE . AV communication circuits between AV control unit and combination meter are malfunctioning.
Navigation unit ==> GPS Antenna	GPS antenna connection malfunctions detected.	GPS antenna Refer to DIAGNOSIS PROCEDURE .
Audio Head Unit ==> XM Antenna	Satellite antenna connection malfunctions detected.	Satellite antenna Refer to DIAGNOSIS PROCEDURE .