Dtc B15C2 Speed Signal Malfunction

Audio Visual Telematics. Land Cruiser. Urj200, 202 Grj200 Vdj200
Navigation Multi Info Display. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CLEAR DTC

CHECK DTC

CHECK VEHICLE SENSOR (OPERATION CHECK)

CHECK COMBINATION METER ASSEMBLY (OUTPUT WAVEFORM)

CHECK HARNESS AND CONNECTOR (MULTI-MEDIA MODULE RECEIVER ASSEMBLY - COMBINATION METER ASSEMBLY)

DTC B15C2 Speed Signal Malfunction


DESCRIPTION

The multi-media module receiver assembly receives a vehicle speed signal from the combination meter assembly and information from the navigation antenna assembly, and then adjusts the vehicle position on the map. The multi-media module receiver assembly stores this DTC when the difference between the speed information that the navigation antenna assembly receives and the SPD pulse received from the combination meter assembly becomes large.
HINT:
  1. A voltage of 12 V or 5 V is output from each ECU and then input to the combination meter assembly. The signal is changed to a pulse signal at the transistor in the combination meter assembly. Each ECU controls the respective systems based on the pulse signal.
  2. If a short occurs in any of the ECUs or in the wire harness connected to an ECU, all systems in the diagram below will not operate normally.

DTC Code
DTC Detection Condition
Trouble Area
B15C2
A difference between the GPS speed and SPD pulse is detected
  1. Meter / gauge system
  2. Multi-media module receiver assembly

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Navigation Multi Info Display.Navigation System. Dtc B15C2 Speed Signal Malfunction


INSPECTION PROCEDURE

NOTICE:
Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed. Refer to Precaution for Navigation System (Click here).
1.CLEAR DTC

  1. Clear the DTCs (Click here).


NEXT


2.CHECK DTC

  1. Recheck for DTCs and check if the same DTC is output again (Click here).

    OK:
    No DTCs are output.


NG
Go to step 3
OK

USE SIMULATION METHOD TO CHECK (Click here)

3.CHECK VEHICLE SENSOR (OPERATION CHECK)


    Land Cruiser. Urj200, 202 Grj200 Vdj200

  1. Enter the "System Sensors Check" screen. Refer to Check GPS & Vehicle Sensors in Operation Check (Click here).

  1. While driving the vehicle, compare the "Speed" indicator to the reading on the speedometer. Check if these readings are almost equal.

    OK:
    The readings are equal or almost equal.


NG
Go to step 4
OK

REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY (Click here)

4.CHECK COMBINATION METER ASSEMBLY (OUTPUT WAVEFORM)


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Navigation Multi Info Display.Navigation System. Dtc B15C2 Speed Signal Malfunction

  1. Check the output waveform.

    1. Remove the combination meter assembly with the connector(s) still connected (Click here).

    2. Connect an oscilloscope to terminal E119-6 (+S) and body ground.

    3. Turn the engine switch on (IG).

    4. Turn a wheel slowly.

    5. Check the signal waveform according to the condition(s) in the table below.

      Item
      		Condition
      Measurement terminal
      		E119-6 (+S) - Body ground
      Tool setting
      		5 V/DIV., 20 ms./DIV.
      Vehicle condition
      		Wheel being rotated
      OK:
      The waveform is similar to that shown in the illustration.
      HINT:
      When the system is functioning normally, one wheel revolution generates 4 pulses. As the vehicle speed increases, the width indicated by (A) in the illustration narrows.
      Text in Illustration
      *a
      		Component with harness connected
      (Combination Meter Assembly)


NG
GO TO METER / GAUGE SYSTEM (Click here)
OK


5.CHECK HARNESS AND CONNECTOR (MULTI-MEDIA MODULE RECEIVER ASSEMBLY - COMBINATION METER ASSEMBLY)

  1. Disconnect the F77 multi-media module receiver assembly connector.

  1. Disconnect the E119 combination meter assembly connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    F77-56 (SPD) - E119-6 (+S)
    		Always
    		Below 1 Ω
    F77-56 (SPD) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY (Click here)