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 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.

HINT: The "Bluetooth" handsfree module is built into the radio receiver.

Component Table





HINT: *: w/ Rear Seat Entertainment System

NEXT -- Continue to next step.

3. INSPECT RADIO RECEIVER ASSEMBLY





(a) Disconnect the I4 and I8* radio receiver assembly connectors.

HINT: *: w/ Rear Seat Entertainment System

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

Standard Resistance:





(c) Reconnect the radio receiver assembly connectors.

NG -- REPLACE RADIO RECEIVER ASSEMBLY
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 AVC-LAN wiring diagram below, check the AVC-LAN circuit between the stereo component amplifier assembly and the component shown by the sub-code.
(1) Disconnect all connectors between the stereo component amplifier assembly and the component shown by the sub-code.
(2) Check for an open or short in the AVC-LAN circuit between the stereo component amplifier assembly 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 STEREO COMPONENT AMPLIFIER ASSEMBLY
OK -- END