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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

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

(c) Measure the voltage according to the value(s) in the table below.

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)

NG

GO TO STEP 4

OK

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. ).

(c) Recheck for DTCs and check that no DTCs are output.

OK:

No DTCs are output.

OK

END

NG

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. ).

(c) Recheck for DTCs and check that no DTCs are output.

OK:

No DTCs are output.

OK

END

NG

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.

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

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

OK

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

NG

REPLACE NO. 1 NAVIGATION WIRE

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