Radio Receiver Communication Error

AUDIO / VISUAL: AUDIO AND VISUAL SYSTEM: Radio Receiver Communication Error
- Radio Receiver Communication Error

INSPECTION PROCEDURE

PROCEDURE

1. IDENTIFY COMPONENT SHOWN BY SUB-CODE

(a) Enter diagnostic mode.





(b) Press preset switch "2" to change the mode to "Detailed Information Mode".

(c) Identify the component shown by the sub-code.

HINT
* "P190" set by the radio receiver is shown in the preceding illustration as an example.
* For details of the DTC display, refer to DTC Check/Clear Reading and Clearing Diagnostic Trouble Codes.

NEXT -- Continue to next step.

2. CHECK COMPONENT SHOWN BY SUB-CODE

(a) Select the component shown by the sub-code.

HINT
The stereo component tuner assembly is built into the radio receiver. If there is a problem between the stereo component tuner assembly and radio receiver, replace the radio receiver.

Component Table





B -- REPLACE RADIO RECEIVER Removal
A -- Continue to next step.

3. 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.

4. INSPECT RADIO RECEIVER

(a) Disconnect the radio receiver connector(s).





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

Standard Resistance:





Text in Illustration





*3: for 8 Speakers

*4: w/ USB Audio System

NG -- REPLACE RADIO RECEIVER Removal
OK -- Continue to next step.

5. 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 Terminals of ECU Pinout Values and Diagnostic Parameters.

(a) Referring to the following AVC-LAN wiring diagram, check the AVC-LAN circuit between the radio receiver and component shown by the sub-code.

(1) Disconnect all connectors between the radio receiver and component shown by the sub-code.

(2) Check for an open or short in the AVC-LAN circuit between the radio receiver and 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.

6. REPLACE COMPONENT SHOWN BY SUB-CODE

(a) Replace the component shown by the sub-code with a known good one and check if the same problem occurs again.

OK:

Malfunction disappears.

NG -- REPLACE RADIO RECEIVER Removal

OK -- END