Toyota Venza: LVDS Signal Malfunction (from Extension Module) (B1532)

Toyota Venza Service Manual / Navigation / Multi Info Display / Navigation System / LVDS Signal Malfunction (from Extension Module) (B1532)

DESCRIPTION

The stereo component tuner assembly and the navigation receiver assembly are connected by the LVDS communication line.

This DTC is stored when an LVDS communication error occurs between the stereo component tuner assembly and the navigation receiver assembly.

DTC No.	DTC Detection Condition	Trouble Area
B1532	When any of the following conditions is met: Video signal (digital) is lost Stereo component tuner assembly is/was not connected while the ignition switch is/was ACC or ON Communication between the navigation receiver assembly and the stereo component tuner assembly is/was not possible when the engine is/was started	Stereo component tuner assembly power source circuit LVDS circuit between navigation receiver assembly and stereo component tuner assembly Stereo component tuner assembly Navigation receiver assembly Navigation wire

HINT:

Even if no malfunction is present, this DTC may be stored depending on the battery condition or engine start voltage.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

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

PROCEDURE

1.	CHECK NAVIGATION WIRE (STEREO COMPONENT TUNER ASSEMBLY POWER SOURCE)

(a) Disconnect the V7 stereo component tuner assembly connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
V7-8 (GND2) - Body ground	Always	Below 1 Ω

Standard Voltage:

Tester Connection	Condition	Specified Condition
V7-4 (+B2) - V7-8 (GND2)	Always	11 to 14 V
V7-3 (ACC2) - V7-8 (GND2)	Ignition switch ACC	11 to 14 V

GO TO STEP 4

2.	REPLACE NAVIGATION WIRE

(a) Replace the navigation wire with a new or known good one (See page ).

(b) Clear the DTCs (See page ).

OK:

No DTCs are output.

END

3.	REPLACE STEREO COMPONENT TUNER ASSEMBLY

(a) Replace the stereo component tuner assembly with a new or known good one (See page ).

(b) Clear the DTCs (See page ).

OK:

No DTCs are output.

END

REPLACE NAVIGATION RECEIVER ASSEMBLY

4.	CHECK NAVIGATION WIRE

(a) Remove the navigation wire (See page ).

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance::

Tester Connection	Condition	Specified Condition
V1-4 (+B2) - V7-4 (+B2)	Always	Below 1 Ω
V1-3 (ACC2) - V7-3 (ACC2)	Always	Below 1 Ω
V1-8 (GND2) - V7-8 (GND2)	Always	Below 1 Ω
V1-4 (+B2) - Body ground	Always	10 kΩ or higher
V1-3 (ACC2) - Body ground	Always	10 kΩ or higher
V1-8 (GND2) - Body ground	Always	Below 1 Ω

REPLACE NAVIGATION RECEIVER ASSEMBLY

REPLACE NAVIGATION WIRE

Diagnostic Trouble Code Chart

DIAGNOSTIC TROUBLE CODE CHART Navigation System DTC Code Detection Item See page B1532 LVDS Signal Malfunction (from Extension Module) ...

Voice Recognition Microphone Disconnected (B1579)

DESCRIPTION The navigation receiver assembly and inner rear view mirror assembly (amplifier microphone assembly) are connected to each other using the microphone connection detection signal lines ...

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