Toyota Tacoma (2015-2018) Service Manual: LVDS Signal Malfunction (from Extension Module) (B1532,B156C)

Toyota Tacoma (2015-2018) Service Manual / Navigation / Multi Info Display / Navigation System / LVDS Signal Malfunction (from Extension Module) (B1532,B156C)

DESCRIPTION

DTC Code	DTC Detection Condition	Trouble Area
B1532	When one of the conditions below is met: Video signal (digital) is lost. The stereo component tuner assembly is not connected while the ignition switch is ON or ACC. Communication between the navigation receiver assembly and the stereo component tuner assembly is not possible when the engine is started.	Stereo component tuner assembly Navigation receiver assembly Harness or connector No. 1 navigation wire
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. (w/ SDARS System)

PROCEDURE

CHECK DTC

(a) Clear the DTCs (See page (b) Check for DTCs (See page ). ).

(b) Check for DTCs (See page OK: ).

OK:

No DTCs are output.

USE SIMULATION METHOD TO CHECK

2.	CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - STEREO COMPONENT TUNER ASSEMBLY)

(a) Disconnect the N19, N27 and N28 navigation receiver assembly connectors.

(b) Disconnect the S52, S53 and S54 stereo component tuner assembly connectors.

Standard Resistance:

Tester Connection	Condition	Specified Condition
N27-1 (USV4) - S53-1 (USV4)	Always	Below 1 Ω
N27-2 (US4-) - S53-2 (US4-)	Always	Below 1 Ω
N27-3 (US4+) - S53-3 (US4+)	Always	Below 1 Ω
N27-4 (UGO4) - S53-4 (UGO4)	Always	Below 1 Ω
N27-5 (USG4) - S53-5 (USG4)	Always	Below 1 Ω
N19-4 (+B2) - S52-4 (+B)	Always	Below 1 Ω
N19-3 (ACC2) - S52-3 (ACC2)	Always	Below 1 Ω
N19-8 (GND2) - S52-8 (GND2)	Always	Below 1 Ω
N28-1 (LVDS) - S54-1 (LVDS)	Always	Below 1 Ω
N27-1 (USV4) - Body ground	Always	10 kΩ or higher
N27-2 (US4-) - Body ground	Always	10 kΩ or higher
N27-3 (US4+) - Body ground	Always	10 kΩ or higher
N27-4 (UGO4) - Body ground	Always	10 kΩ or higher
N27-5 (USG4) - Body ground	Always	10 kΩ or higher
N19-4 (+B2) - Body ground	Always	10 kΩ or higher
N19-3 (ACC2) - Body ground	Always	10 kΩ or higher
N19-8 (GND2) - Body ground	Always	10 kΩ or higher
N28-1 (LVDS) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.	CHECK NO. 1 NAVIGATION WIRE

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

(b) Clear the DTCs (See page (c) Check for DTCs (See page ). ).

OK:

No DTCs are output.

END (NO. 1 NAVIGATION WIRE WAS DEFECTIVE)

4.	CHECK STEREO COMPONENT TUNER ASSEMBLY

(a) Replace the stereo component tuner assembly with a known good one (See page (b) Clear the DTCs (See page ). ).

(b) Clear the DTCs (See page (c) Check for DTCs (See page ). ).

OK:

No DTCs are output.

END (STEREO COMPONENT TUNER ASSEMBLY IS DEFECTIVE)

REPLACE NAVIGATION RECEIVER ASSEMBLY

Lost Communication with Meter (B1324)

DESCRIPTION This DTC is stored when a communication error occurs between the navigation receiver assembly and combination meter assembly. DTC No. DTC Detection Condition ...

HD Radio Tuner Malfunction (B1551,B15A0,B15AD,B15B0,B15B3,B15B4,B15B7)

DESCRIPTION These DTCs are stored when a malfunction occurs in the navigation receiver assembly. DTC No. DTC Detection Condition Trouble Area B1551 ...

Other materials:

All Doors LOCK/UNLOCK Functions do not Operate Via Door Control Switch
DESCRIPTION The main body ECU (multiplex network body ECU) receives switch signals from the door control switch assembly on the front passenger door and activates the door lock motor on each door according to these signals. WIRING DIAGRAM PROCEDURE 1. READ VALUE USIN ...

Blind Spot Monitor Slave Module Beam Axis Inspection Incomplete (C1ABC)
DESCRIPTION This DTC is stored when a beam axis inspection has not been performed for the blind spot monitor sensor RH. HINT: This DTC is always stored after replacing a blind spot monitor sensor. The purpose of this DTC is to ensure that beam axis inspection is performed. Completing the be ...

Disassembly
DISASSEMBLY PROCEDURE 1. REMOVE RADIATOR DRAIN COCK PLUG (a) Remove the radiator drain cock plug from the radiator assembly. (b) Remove the O-ring from the radiator drain cock plug. 2. REMOVE RADIATOR TO SUPPORT SEAL (a) Remove the 2 radiator to support seals from the radiator assem ...