How To Proceed With Troubleshooting

HINT:

• Use these procedures to troubleshoot the multiplex communication system.
• *: Use the intelligent tester.

1. VEHICLE BROUGHT TO WORKSHOP 
2. INSPECT BATTERY VOLTAGE 

   Standard voltage: 10 to 14 V 

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

3. CHECK FOR DTC* 
   1. Check for DTCs and note any codes that are output.
   2. Delete the DTC.
   3. Recheck for DTCs. Try to prompt the DTC by simulating the original activity that the DTC suggests.

   Result: 

   RESULT REFERENCE
   
   

   Result	Proceed to
   DTC does not reoccur	A
   DTC reoccurs	B

   B: Go to step   5 

   A: Go to Next Step 

4. OVERALL ANALYSIS AND TROUBLESHOOTING 
   1. Terminals of ECU (see TERMINALS OF ECU  )
5. ADJUST, REPAIR OR REPLACE 
6. CONFIRMATION TEST 

   NEXT: END