Rear Display Assembly Communication Error

IDENTIFY THE COMPONENT SHOWN BY THE SUB-CODE
1. Enter the diagnostic mode.
2. Press the "LAN Mon" switch to change to "LAN Monitor" mode.
3. Identify the component shown by the sub-code.
  HINT:
  - The "110 (multi-display)" is the component shown by the sub-code in the example shown in the illustration.
  - The sub-code will be indicated by its physical address.
  - For the component list, refer to "DIAGNOSIS DISPLAY DETAILED DESCRIPTION " .
Fig 1: Multi-Display Screen - System Check Mode And LAN Monitor
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

CHECK POWER SOURCE CIRCUIT OF COMPONENT SHOWN BY SUB-CODE

Inspect the power source circuit of the component shown by the sub-code.

If the power source circuit is operating normally, proceed to the next step.

Component Table

COMPONENT REFERENCE TABLE

Component	Proceed to
Rear Display Assembly (1B0)	REAR DISPLAY ASSEMBLY POWER SOURCE CIRCUIT

INSPECT MULTI-DISPLAY CONTROLLER

Disconnect the multi-display connectors.
Measure the resistance according to the value(s) in the table below.

Resistance

RESISTANCE SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
TX+ (R25-1) - TX- (R25-6)	Always	60 to 80 Ω
TX2+ (R17-5) - TX2- (R17-4)	Always	60 to 80 Ω
TX3+ (R15-17) TX3- (R15-18)	Always	60 to 80 Ω
TX4+ (R16-14) TX4- (R16-13)	Always	60 to 80 Ω

Fig 2: Disconnecting Multi-Display Connectors

G04092725

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE MULTI-DISPLAY CONTROLLER

OK: Go to next step.

CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY - COMPONENT SHOWN BY SUB-CODE)
HINT:
- Start the check from the circuit that is near the component shown by the sub-code first.
- For details of the connectors, refer to the "TERMINALS OF ECU " .
1. Referring to the AVC-LAN wiring diagram below, check the AVC-LAN circuit between the multi-display and the component shown by the sub-code.
  
  Fig 3: AVC-LAN Wiring Diagram
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  1. Check for open or short in the AVC-LAN circuit between the multi-display and the component shown by the sub-code.
    OK: There is no open or short circuit.
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step.
REPLACE COMPONENT SHOWN BY SUB-CODE
1. Replace the component shown by the sub-code with a normal one and check if the same problem occurs again.
  OK: Same problem does not occur.
NG: REPLACE REAR DISPLAY ASSEMBLY

OK: END