Dtc B1532 Lvds Signal Malfunction (From Extension Module)


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK HARNESS AND CONNECTOR (NAVIGATION ECU POWER SOURCE)

REPLACE HARNESS AND CONNECTOR (LVDS COMMUNICATION LINE)

REPLACE NAVIGATION ECU

CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - NAVIGATION ECU)

DTC B1532 LVDS Signal Malfunction (from Extension Module)


DESCRIPTION

The navigation ECU and the radio and display receiver assembly are connected by the LVDS communication line.
This DTC is stored when an LVDS communication error occurs between the navigation ECU and the radio and display receiver assembly.

DTC Code
DTC Detection Condition
Trouble Area
B1532
When one of the conditions below is met:
  1. Video signal (digital) is lost.
  2. Navigation ECU is/was not connected while the engine switch is/was on (IG) or (ACC).
  3. Communication between the master unit and the navigation ECU is/was not possible when the engine is/was started.
  1. Navigation ECU power source circuit
  2. LVDS circuit between radio and display receiver assembly and navigation ECU
  3. Navigation ECU
  4. Radio and display receiver assembly
  5. Harness or connector
HINT:
  1. Even if no fault is present, this DTC may be stored depending on the battery condition or engine start voltage.
  2. The radio and display receiver assembly is the master unit.

WIRING DIAGRAM


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Navigation Multi Info Display.Navigation System (For Radio And Display Type). Dtc B1532 Lvds Signal Malfunction (From Extension Module)


INSPECTION PROCEDURE

1.CHECK HARNESS AND CONNECTOR (NAVIGATION ECU POWER SOURCE)

  1. Disconnect the V5 navigation ECU connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    z13-2 (GND) - Body ground
    		Always
    		Below 1 Ω

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    z13-1 (B+) - z13-2 (GND)
    		Always
    		11 to 14 V
    z13-3 (ACC) - z13-2 (GND)
    		Engine switch on (ACC)
    		11 to 14 V


NG
Go to step 4
OK


2.REPLACE HARNESS AND CONNECTOR (LVDS COMMUNICATION LINE)

  1. Replace the harness and connector (LVDS communication line).

  1. Clear the DTCs (LandCruiser RM0000011BU0W8X.html).

  1. Recheck for DTCs and check that no DTCs are output.

    OK:
    No DTCs are output.


NG
Go to step 3
OK

END (LVDS COMMUNICATION LINE IS DEFECTIVE)

3.REPLACE NAVIGATION ECU

  1. Replace the navigation ECU with a known good one (LandCruiser RM000004OAH00PX.html).

  1. Clear the DTCs (LandCruiser RM0000011BU0W8X.html).

  1. Recheck for DTCs and check that no DTCs are output.

    OK:
    No DTCs are output.


NG
REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY (LandCruiser RM000005M1U002X.html)
OK

END (NAVIGATION ECU IS DEFECTIVE)

4.CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - NAVIGATION ECU)

  1. Disconnect the z12 radio and display receiver assembly connector.

  1. Disconnect the z13 navigation ECU connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    z12-4 (+B2) - z13-1 (B+)
    		Always
    		Below 1 Ω
    z12-3 (ACC2) - z13-3 (ACC)
    		Always
    		Below 1 Ω
    z12-8 (GND2) - z13-2 (GND)
    		Always
    		Below 1 Ω
    z12-4 (+B2) - Body ground
    		Always
    		10 kΩ or higher
    z12-3 (ACC2) - Body ground
    		Always
    		10 kΩ or higher
    z12-8 (GND2) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY (LandCruiser RM000005M1U002X.html)