Radio Receiver Communication Error

AUDIO AND VISUAL SYSTEM: Radio Receiver Communication Error

Radio Receiver Communication Error

INSPECTION PROCEDURE

PROCEDURE

1. IDENTIFY THE COMPONENT SHOWN BY SUB-CODE
(a) Enter the diagnostic mode.





(b) Press the preset switch "3" to change to "Detailed Information Mode".
(c) Identify the component shown by the sub-code.
HINT:
- "190 (radio receiver)" is the component shown by the sub-code in the example shown in the illustration.
- For details of the DTC display, refer to "DTC CHECK/CLEAR" Reading and Clearing Diagnostic Trouble Codes.

NEXT -- Continue to next step.
2. CHECK POWER SOURCE CIRCUIT OF COMPONENT SHOWN BY SUB-CODE
(a) 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:





NEXT -- Continue to next step.
3. INSPECT RADIO RECEIVER





(a) Disconnect the radio receiver connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- REPLACE RADIO RECEIVER
OK -- Continue to next step.
4. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - 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" Pinout Values and Diagnostic Parameters.
(a) Referring to the AVC-LAN wiring diagram below, check the AVC-LAN circuit between the radio receiver and the component shown by the sub-code.
(1) Disconnect all connectors between the radio receiver and the component shown by the sub-code.
(2) Check for an open or short in the AVC-LAN circuit between the radio receiver and the component shown by the sub-code.
OK:
There is no open or short circuit.





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
5. REPLACE COMPONENT SHOWN BY SUB-CODE
(a) 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 RADIO RECEIVER
OK -- END