Toyota Tundra Service Manual: LVDS Signal Malfunction (from Extension Module) (B1532,B156C)

Toyota Tundra Service Manual / Audio, Visual, Telematics / Audio / Video / Audio And Visual System / LVDS Signal Malfunction (from Extension Module) (B1532,B156C)

DESCRIPTION

DTC Code

DTC Detection Condition

Trouble Area

B1532

When either condition below is met:.

  • The stereo component tuner assembly is not connected while the ignition switch is ON or ACC.
  • Communication between the radio and display receiver assembly and the stereo component tuner assembly is not possible when the engine is started.
  • No. 1 navigation wire
  • Stereo component tuner assembly
  • Radio and display receiver assembly

B156C

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 FOR DTC

(a) Clear the DTCs (See page ).

(b) Check for DTCs (See page ).

OK:

No DTCs are output.

OK

USE SIMULATION METHOD TO CHECK

NG

2.

CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - STEREO COMPONENT TUNER ASSEMBLY)

(a) Disconnect the K5 and L2 radio and display receiver assembly connectors.

(b) Disconnect the K2 and L3 stereo component tuner assembly connectors.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

K5-1 (USV4) - K2-1 (USV4)

Always

Below 1 Ω

K5-2 (US4-) - K2-2 (US4-)

Always

Below 1 Ω

K5-3 (US4+) - K2-3 (US4+)

Always

Below 1 Ω

K5-4 (UGD4) - K2-4 (UGD4)

Always

Below 1 Ω

K5-5 (USG4) - K2-5 (USG4)

Always

Below 1 Ω

L2-4 (+B2) - L3-4 (+B2)

Always

Below 1 Ω

L2-3 (ACC2) - L3-3 (ACC2)

Always

Below 1 Ω

L2-8 (GND2) - L3-8 (GND2)

Always

Below 1 Ω

K5-1 (USV4) - Body ground

Always

10 kΩ or higher

K5-2 (US4-) - Body ground

Always

10 kΩ or higher

K5-3 (US4+) - Body ground

Always

10 kΩ or higher

K5-4 (UGD4) - Body ground

Always

10 kΩ or higher

K5-5 (USG4) - Body ground

Always

10 kΩ or higher

L2-4 (+B2) - Body ground

Always

10 kΩ or higher

L2-3 (ACC2) - Body ground

Always

10 kΩ or higher

L2-8 (GND2) - Body ground

Always

10 kΩ or higher

Result

Result

Proceed to

OK

A

NG (for Column Shift Type)

B

NG (for Floor Shift Type)

C

B

REPAIR OR REPLACE NO.1 NAVIGATION WIRE

C

REPAIR OR REPLACE NO. 1 NAVIGATION WIRE

A

3.

CHECK NO. 1 NAVIGATION WIRE (LVDS COMMUNICATION LINE)

(a) Replace the No. 1 navigation wire with a known good one.

  • for Column Shift Type: See page
  • for Floor Shift Type: See page

(b) Clear the DTCs (See page ).

(c) Check for DTCs (See page ).

OK:

No DTCs are output.

OK

END (NO. 1 NAVIGATION WIRE [LVDS COMMUNICATION LINE] IS DEFECTIVE)

NG

4.

CHECK STEREO COMPONENT TUNER ASSEMBLY

(a) Replace the stereo component tuner assembly with a known good one.

  • for Column Shift Type: See page
  • for Floor Shift Type: See page

(b) Clear the DTCs (See page ).

(c) Check for DTCs (See page ).

OK:

No DTCs are output.

Result

Result

Proceed to

OK

A

NG (for Column Shift Type)

B

NG (for Floor Shift Type)

C

A

END (STEREO COMPONENT TUNER ASSEMBLY IS DEFECTIVE)

B

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

C

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

    Lost Communication with Meter (B1324)

    HD Radio Tuner Malfunction (B1551,B15A0,B15B0,B15B3-B15B5,B15B7)

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