Stereo Component Amplifier Communication Error

AUDIO / VISUAL: AUDIO AND VISUAL SYSTEM: Stereo Component Amplifier Communication Error

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





NEXT -- Continue to next step.

3. INSPECT RADIO RECEIVER ASSEMBLY




(a) Disconnect the R1 radio receiver assembly connectors.
(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