Toyota 4Runner: HD Radio Tuner Malfunction (B1551,B15A0,B15AD,B15B0,B15B3,B15B4,B15B7)

Toyota 4Runner Service Manual / Audio / Visual / Telematics / Navigation / Multi Info Display / Navigation System / HD Radio Tuner Malfunction (B1551,B15A0,B15AD,B15B0,B15B3,B15B4,B15B7)

DESCRIPTION

These DTCs are stored when a malfunction occurs in the navigation receiver assembly.

DTC No.	DTC Detection Condition	Trouble Area
B1551	When one of the conditions below is met: "HD Radio" tuner decoder malfunction "HD Radio" tuner audio output section malfunction "HD Radio" tuner decoder RF/IF malfunction	Navigation receiver assembly
B15A0	When either condition below is met: Bus malfunction EEPROM error
B15AD	When one of the conditions below is met: A short to ground, short to +B or open occurs in the gyro signal circuit Gyro sensor malfunction GPS receiver malfunction
B15B0	Picture circuit (TFT unit) malfunction
B15B3	When one of the conditions below is met: AM tuner PLL is unlocked FM tuner PLL is unlocked Tuner malfunction
B15B4	When one of the conditions below is met: Mechanism drive signal malfunction Load/Eject malfunction Read mechanism malfunction Mechanical malfunction
B15B7	"Bluetooth" module malfunction

CAUTION / NOTICE / HINT

NOTICE:

After replacing the navigation receiver assembly of vehicles subscribed to pay-type satellite radio broadcasts, registration of the XM radio ID is necessary.

PROCEDURE

CHECK DTC

(a) Clear the DTCs (See page ).

(b) Recheck for DTCs and check if the same DTC are output again.

OK:

No DTCs are output.

USE SIMULATION METHOD TO CHECK

REPLACE NAVIGATION RECEIVER ASSEMBLY

LVDS Signal Malfunction (from Extension Module) (B1532)

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Voice Recognition Microphone Disconnected (B1579)

DESCRIPTION The navigation receiver assembly and map light assembly (telephone microphone assembly) are connected to each other using the microphone connection detection signal lines. This DTC i ...

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