How To Proceed With Troubleshooting

HINT:

Use these procedures to troubleshoot the navigation system.
*: Use intelligent tester.

VEHICLE BROUGHT TO WORKSHOP
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INSPECT BATTERY VOLTAGE
Standard voltage: 11 to 14 V

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

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BASIC INSPECTION

Turn the power switch ON (ACC).

Check whether or not the display appears on the multi-display.

Result

RESULT CHART

Result	Proceed to
Display appears	A
Display does not appear	B

B : Go to step 7

A : GO TO NEXT STEP

INSPECT COMMUNICATION FUNCTION OF MULTIPLEX COMMUNICATION SYSTEM (BEAN)*

Use the intelligent tester to check if the Multiplex Communication System (MPX) is functioning normally.

Result

RESULT CHART

Result	Proceed to
MPX DTC is not output	A
MPX DTC is output	B

B : Go to MULTIPLEX COMMUNICATION SYSTEM

A : GO TO NEXT STEP

CHECK FOR DTC

Check for DTCs and note any codes that are output.
Delete for DTC.

Recheck for DTCs. Based on the DTC output in the first step, try to force output of the audio system DTC by simulating the operation indicated by the DTC.

HINT:

If the system cannot enter the diagnosis mode, inspect each AVC-LAN communication signal and repair or replace problem parts.
Even if the malfunction symptom is not confirmed, check for DTCs. This is because the system stores past DTCs.
Refer to the detailed description on the diagnostic screen, as necessary (see NAVIGATION CHECK MODE ).
Check and clear past diagnostic trouble codes. Check the diagnostic trouble code and inspect the area the code indicates.

Result

RESULT CHART

Result	Proceed to
DTC does not reoccur	A
DTC does not reoccurs	B

B : Go to step 8

A : GO TO NEXT STEP

PROBLEM SYMPTOMS TABLE

Result

RESULT CHART

Result	Proceed to
Fault is not listed in problem symptoms table	A
Fault is listed in problem symptoms table	B

B : Go to step 8

A : GO TO NEXT STEP

OVERALL ANALYSIS AND TROUBLESHOOTING
1. TERMINALS OF ECU
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ADJUST, REPAIR OR REPLACE
NEXT : END