How To Proceed With Troubleshooting

Standard voltage: 

11 to 14 V 

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

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

   Result 

   RESULT REFERENCE
   
   

   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 

1. Turn the ignition switch on (IG).
2. Check whether or not the radio receiver and multi-display (accessory meter) turn on.

   Result 

   RESULT REFERENCE
   
   

   Result	Proceed to
   Radio receiver and multi-display (accessory meter) turn on	A
   Radio receiver and multi-display (accessory meter) do not turn on	B

B:  Go to step  7

A: Go to Next Step 

1. Check for DTCs and note any codes that are output.
2. Delete the DTCs.
3. 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 

   RESULT REFERENCE
   
   

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

B:  Go to step  7

A: Go to Next Step 

Find the output code on the diagnostic trouble code chart (See DIAGNOSTIC TROUBLE CODE CHART ).

NEXT:  Go to step  9

Refer to the problem symptoms table (See PROBLEM SYMPTOMS TABLE ).

Result 

B:  Go to step  9

A: Go to Next Step 

1. Terminals of ECU (See TERMINALS OF ECU ).

NEXT: END