Toyota Tundra (2015 year). Manual — part 945

Last Modified: 9-16-2014

6.6 C

Doc ID: RM000005KS600AX

Model Year: 2015

Model: Tundra

Prod Date Range: [08/2014 - ]

Title: AUDIO / VISUAL: AUDIO AND VISUAL SYSTEM: B1532,B156C; LVDS Signal Malfunction (from Extension

Module); 2015 MY Tundra [08/2014 - ]

DTC

B1532

LVDS Signal Malfunction (from Extension Module)

DTC

B156C

Extension Module Disconnected

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

AUDIO / VISUAL: AUDIO AND VISUAL SYSTEM: B1532,B156C;...

INSPECTION PROCEDURE

NOTICE:

PROCEDURE

1.

CHECK FOR DTC

(a) Clear the DTCs

.

(b) Check for DTCs

.

OK:

No DTCs are output.

NG

GO TO STEP 2

AUDIO / VISUAL: AUDIO AND VISUAL SYSTEM: B1532,B156C;...

OK

USE SIMULATION METHOD TO CHECK

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

AUDIO / VISUAL: AUDIO AND VISUAL SYSTEM: B1532,B156C;...

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:

for Floor Shift Type:

(b) Clear the DTCs

.

(c) Check for DTCs

.

OK:

No DTCs are output.

NG

GO TO STEP 4

OK

END (NO. 1 NAVIGATION WIRE [LVDS

COMMUNICATION LINE] IS DEFECTIVE)

4.

CHECK STEREO COMPONENT TUNER ASSEMBLY

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

for Column Shift Type:

for Floor Shift Type:

(b) Clear the DTCs

.

(c) Check for DTCs

.

OK:

No DTCs are output.

Result

RESULT

PROCEED TO

OK

A

NG (for Column Shift Type)

B

NG (for Floor Shift Type)

C

B

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

C

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

AUDIO / VISUAL: AUDIO AND VISUAL SYSTEM: B1532,B156C;...