How To Proceed With Troubleshooting

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

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

INSPECT COMMUNICATION FUNCTION OF LARGE-SCALE MULTIPLEX COMMUNICATION SYSTEM (BEAN)

Using the intelligent tester, check if the Multiplex Communication System (MPX) is functioning normally.

Result

MPX DTC RESULT

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

A: Go to next step

BASIC INSPECTION

Check whether or not the radio receiver turns on.

Result

RADIO RECEIVER RESULT

Result	Proceed to
Radio receiver turns on	A
Radio receiver does not turn on	B

B: Go to step 6

A: Go to next step

CHECK FOR DTC

Check for DTCs and note any codes that are output.
Delete the DTCs.
Recheck 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 the problem parts.
- 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

DTC OUTPUT RESULT

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

B: Go to step 7

A: Go to next step

DIAGNOSTIC TROUBLE CODE CHART
Find the output code on the DIAGNOSTIC TROUBLE CODE CHART .

NEXT: Go to step 9

Result

PROBLEM SYMPTOMS RESULT

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

B: Go to step 9

A: Go to next step