Toyota Sienna Service Manual: Radio and Navigation Assembly Communication Error

INSPECTION PROCEDURE

1 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:

•  "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"

2 CHECK POWER SOURCE CIRCUIT OF COMPONENT SHOWN BY SUB-CODE

1. 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:

3 CHECK RADIO AND NAVIGATION ASSEMBLY

1. Disconnect the radio and navigation assembly.
2.  Measure the resistance according to the value(s) in the table below.

Standard resistance

4 CHECK HARNESS AND CONNECTOR

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 "TERMINALS OF ECU".

1.  Referring to the AVC-LAN wiring diagram below, check the AVC-LAN circuit between the radio and navigation assembly and the component shown by the sub-code.

1.  Disconnect all connectors between the radio and navigation assembly and the component shown by sub-code.
2.  Check for an open or short in the AVC-LAN circuit between the radio and navigation assembly and the component shown by the sub-code

OK: There is no open or short circuit.

5 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.

END