Stereo Component Amplifier Communication Error

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Stereo Component Amplifier 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 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.
HINT: The "Bluetooth" handsfree module is built into the radio receiver. If there is a problem between the "Bluetooth" handsfree module and radio receiver, replace the radio receiver.

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:





Text in Illustration





- *3: w/ Rear Seat Entertainment System

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

4. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - 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 stereo component amplifier and component shown by the sub-code.
(1) Disconnect all connectors between the stereo component amplifier and component shown by the sub-code.
(2) Check for an open or short in the AVC-LAN circuit between the stereo component amplifier 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.

5. 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 STEREO COMPONENT AMPLIFIER
OK -- END