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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

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

1.

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.

OK

USE SIMULATION METHOD TO CHECK

NG

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.

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

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

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

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  ). ).

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

OK:

No DTCs are output.

OK

END (NO. 1 NAVIGATION WIRE WAS DEFECTIVE)

NG

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  ). ).

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

OK:

No DTCs are output.

OK

END (STEREO COMPONENT TUNER ASSEMBLY IS DEFECTIVE)

NG

REPLACE NAVIGATION RECEIVER ASSEMBLY

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