DTC    B156F    No Response from Motor Control

DTC    B1560    Motor Control Disconnected

for Preparation Click here


DESCRIPTION

The navigation computer sub-assembly and display module board are connected by the AVC-LAN communication line.
When an AVC-LAN communication error occurs between the navigation computer sub-assembly and display module board, these DTCs will be stored.

DTC No.
DTC Detection Condition
Trouble Area
B156F
No response to the diagnostic memory request from the master unit.
  1. Display module board power source circuit
  2. AVC-LAN circuit between navigation computer sub-assembly and display module board
  3. Display module board
  4. Navigation computer sub-assembly
B1560*1
A device that is listed in the AVC-LAN connected device record of the master unit is missing.

HINT:
  1. *1: Even if no fault is present, this DTC may be stored depending on the auxiliary battery condition or hybrid system start voltage.
  2. The navigation computer sub-assembly is the master unit.


WIRING DIAGRAM


E176585E09


INSPECTION PROCEDURE

NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.

1.CHECK OPTIONAL COMPONENTS (INCLUDING ASSOCIATED WIRING)

  1. Check for optional components

    1. Check that optional components (including associated wiring) which generate radio waves are not installed.

      Result:
      Result
      		Proceed to
      Optional components (including associated wiring) are installed.
      		A
      Optional components (including associated wiring) are not installed.
      		B

      HINT:
      1. Electrical noise from radio waves generated by optional components or the wiring for those components may affect AVC-LAN communication.
      2. These DTCs may be stored when an AVC-LAN communication error occurs due to electrical noise.



B
Go to step 3
A


2.REMOVE OPTIONAL COMPONENTS (INCLUDING ASSOCIATED WIRING)

  1. Remove optional components (including associated wiring).

    NOTICE:
    Do not remove optional components or associated wiring without the permission of the customer.


NEXT


3.CHECK DTC

  1. Clear the DTCs (Click here).

  1. Recheck for DTCs and check if the same DTCs are output again.

    OK:
    No DTCs are output.



NG
Go to step 4
OK

END 

4.CHECK HARNESS AND CONNECTOR (DISPLAY MODULE BOARD POWER SOURCE)

  1. Disconnect the H21 display module board connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    H21-3 (SGND) - 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
    H21-1 (+B2) - H21-3 (SGND)
    		Power switch off
    		11 to 14 V
    H21-2 (ACC2) - H21-3 (SGND)
    		Power switch on (ACC)
    		11 to 14 V



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


5.CHECK HARNESS AND CONNECTOR

  1. Disconnect the H21 display module board connector.

  1. Disconnect the H60 navigation computer sub-assembly connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    H21-9 (TX4+) - H60-13 (TX2+)
    		Always
    		Below 1 Ω
    H21-10 (TX4-) - H60-14 (TX2-)
    		Always
    		Below 1 Ω
    H21-9 (TX4+) - Body ground
    		Always
    		10 kΩ or higher
    H21-10 (TX4-) - Body ground
    		Always
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


6.REPLACE DISPLAY MODULE BOARD

  1. Replace the display module board (Click here).

  1. Clear the DTCs (Click here).

  1. Recheck for DTCs and check if the same DTCs are output again.

    OK:
    No DTCs are output.



NG
REPLACE NAVIGATION COMPUTER SUB-ASSEMBLY (Click here)
OK

END