Stereo Component Amplifier Communication Error

NAVIGATION / MULTI INFO DISPLAY: NAVIGATION 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 "LAN Mon" switch to change to "LAN Monitor" mode.
(c) Identify the component shown by the sub-code.

HINT:
- "140 (navigation receiver)" is the component shown by the sub-code in the example shown in the illustration.
- The sub-code will be indicated by its physical address.
- For the component list, refer to "Diagnosis Display Detailed Description" Diagnosis Display Detailed Description.

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.

Component Table





HINT:
- *: w/ Rear Seat Entertainment System
- If the power source circuit is operating normally, proceed to the next step.

NEXT -- Continue to next step.

3. INSPECT NAVIGATION RECEIVER ASSEMBLY





(a) Disconnect the I20 and I25* navigation receiver assembly connectors.

HINT: *: w/ Rear Seat Entertainment System

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





HINT: *: w/ Rear Seat Entertainment System

(c) Reconnect the navigation receiver assembly connectors.

NG -- REPLACE NAVIGATION 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 and the component shown by sub-code.
(2) Check for an open or short in the AVC-LAN circuit between the stereo component amplifier 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