Toyota Sienna Service Manual: How to proceed with troubleshooting

Toyota Sienna Service Manual / Audio / visual / Audio and visual system / How to proceed with troubleshooting

1 VEHICLE BROUGHT TO WORKSHOP

2 INSPECT BATTERY VOLTAGE

Standard voltage: 11 to 14 V

If the voltage is below 11 V, recharge or replace the battery before proceeding.

3 BASIC INSPECTION

Turn the ignition switch ON.
Check whether or not the radio receiver turns on.

Result

Result

4 CHECK FOR DTC

Check for DTCs and note any codes that are output.
Delete the DTCs.
Recheck for DTCs by simulating the operation indicated by the DTCs.

HINT:

If the system cannot enter the diagnosis mode, inspect the AVC-LAN and all the components that connect to the AVC-LAN for short circuits and repair or replace the problem part.
Even if the malfunction symptom is not confirmed, check the DTCs. This is because the system stores past DTCs.
Check and clear past DTCs. Then check for DTCs.

Result

Result

5 DIAGNOSTIC TROUBLE CODE CHART

Find the output code on the diagnostic trouble code chart

6 PROBLEM SYMPTOMS TABLE

Refer to the problem symptoms table

Result

Result

7 OVERALL ANALYSIS AND TROUBLESHOOTING

Terminals of ECU

8 ADJUST, REPAIR OR REPLACE

9 CONFIRMATION TEST

END

System diagram

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Identification of noise source

1. Radio Description Radio frequency band Radio broadcasts use the radio frequency bands shown in the table below. Service area The service areas of A ...

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Problem symptoms table
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