Toyota Tacoma (2015-2018) Service Manual: LVDS Signal Malfunction (from Extension Module) (B1532)

Toyota Tacoma (2015-2018) Service Manual / Audio / Video / Audio And Visual System / LVDS Signal Malfunction (from Extension Module) (B1532)

DESCRIPTION

The stereo component tuner assembly and the radio and display receiver assembly are connected by an LVDS communication line.

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

DTC Code	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 radio and display receiver assembly and stereo component tuner assembly is/was not possible when the engine is/was started.	Stereo component tuner assembly power source circuit LVDS circuit between radio and display receiver assembly and stereo component tuner assembly Stereo component tuner assembly Radio and display receiver assembly No. 1 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 NO. 1 NAVIGATION WIRE (STEREO COMPONENT TUNER ASSEMBLY POWER SOURCE)

(a) Disconnect the 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
S52-8 (GND2) - Body ground	Always	Below 1 Ω

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
S52-4 (+B2) - S52-8 (GND2)	Always	11 to 14 V
S52-3 (ACC2) - S52-8 (GND2)	Ignition switch ACC	11 to 14 V

Text in Illustration

*a	Front view of wire harness connector (to Stereo Component Tuner Assembly)

GO TO STEP 4

2.	REPLACE NO. 1 NAVIGATION WIRE

(a) Replace the No. 1 navigation wire with a new or known good one (See page (b) Clear the DTCs (See page ). ).

(b) Clear the DTCs (See page (c) Recheck for DTCs and check that no DTCs are output. ).

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 ). ).

(b) Clear the DTCs (See page (c) Recheck for DTCs and check that no DTCs are output. ).

OK:

No DTCs are output.

END

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

4.	CHECK NO. 1 NAVIGATION WIRE

(a) Disconnect the R27 radio and display receiver assembly connector.

(b) Disconnect the S52 stereo component tuner assembly connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
R27-4 (+B2) - S52-4 (+B2)	Always	Below 1 Ω
R27-3 (ACC2) - S52-3 (ACC2)	Always	Below 1 Ω
R27-8 (GND2) - S52-8 (GND2)	Always	Below 1 Ω
R27-4 (+B2) - Body ground	Always	10 kΩ or higher
R27-3 (ACC2) - Body ground	Always	10 kΩ or higher
R27-8 (GND2) - Body ground	Always	10 kΩ or higher

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

REPLACE NO. 1 NAVIGATION WIRE

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