How To Proceed With Troubleshooting

HINT:

Use this procedure to troubleshoot the smart key system.
The intelligent tester can be used in steps 3, 4, 5 and 7.
When troubleshooting the smart key system using the intelligent tester with the engine switch off, connect the intelligent tester to the vehicle and repeat turning any of the courtesy light switches on and off until communication between the tester and the vehicle begins (the interval ON and OFF should be less than 1.5 sec).

VEHICLE BROUGHT TO WORKSHOP
CUSTOMER PROBLEM ANALYSIS
1. Confirm problem symptoms.

CHECK MULTIPLEX COMMUNICATION SYSTEM

Check for DTCs (See DTC CHECK / CLEAR ).
HINT:

This system uses multiplex communication. Check for DTCs for the multiplex communication system before performing the troubleshooting.

Result

RESULT REFERENCE CHART

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

B: GO TO MULTIPLEX COMMUNICATION SYSTEM

A: Go to Next Step

CHECK DTC

Check for DTCs (See DTC CHECK / CLEAR ).
1. Record the DTCs.
Clear the DTCs.
HINT:

After DTCs are all cleared, check if the trouble occurs again 6 seconds after the engine switch is turned on (IG).
Recheck for DTCs.
1. Simulate the malfunction and check if the DTCs are output again. Result

DTC RESULT REFERENCE

Result	Proceed to
DTC is output.	A
DTC is not output.	B
DTCs are not output, and the malfunction cannot be simulated or checked.	C

B: Go to step 10

C: SYMPTOM SIMULATION

A: Go to Next Step

DTC CHART
CIRCUIT INSPECTION
OVERALL ANALYSIS AND TROUBLESHOOTING
1. DATA LIST / ACTIVE TEST (See DATA LIST / ACTIVE TEST )
  1. Inspection with the intelligent tester (DATA LIST/ACTIVE TEST)
2. Terminal of ECU (See TERMINALS OF ECU )
3. On-vehicle inspection (See ON-VEHICLE INSPECTION E )
ADJUST, REPAIR OR REPLACE
CONFIRMATION TEST
NEXT: END
PROBLEM SYMPTOMS TABLE
ADJUST, REPAIR OR REPLACE
CONFIRMATION TEST
NEXT: END