How To Proceed With Troubleshooting

THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): HOW TO PROCEED WITH TROUBLESHOOTING

HINT
* Use these procedures to troubleshoot the push-button start function.
* *: Use the Techstream.

1. VEHICLE BROUGHT TO WORKSHOP

NEXT -- Continue to next step.

2. CUSTOMER PROBLEM ANALYSIS CHECK

HINT
* In troubleshooting, confirm that the problem symptoms have been accurately identified. Preconceptions should be discarded in order to make an accurate judgment. To clearly understand what the problem symptoms are, it is extremely important to ask the customer about the problem and the conditions at the time the malfunction occurred.
* Gather as much information as possible for reference. Past problems that seem unrelated may also help in some cases.

* The following 5 items are important points in the problem analysis:





NEXT -- Continue to next step.

3. INSPECT BATTERY VOLTAGE

Standard voltage:

11 to 14 V

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

NEXT -- Continue to next step.

4. INSPECT COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*

(a) Use the Techstream to check if the CAN communication system is functioning normally.

Result





B -- GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) How to Proceed With Troubleshooting
A -- Continue to next step.

5. CHECK FOR DTC*

(a) Check for DTCs and note any codes that are output Smart Key System (for Start Function).

(b) Clear the DTCs Smart Key System (for Start Function).

(c) Recheck for DTCs.

Result





B -- GO TO DIAGNOSTIC TROUBLE CODE CHART Smart Key System (for Start Function)
A -- Continue to next step.

6. INSPECT BASIC OPERATION

(a) Check that the engine can be started by the basic operation.

(1) Push the engine switch when the brake pedal is depressed and the shift lever is in P. Check that the engine starts.

OK:

Engine starts.

(b) Check that the engine switch mode can be changed by pushing the engine switch.

(1) Without depressing the brake pedal, push the engine switch repeatedly. Check that the power source mode turns from off to on (ACC) to on (IG) and back to off.

OK:

Power source mode changes as described above.

(2) With the brake pedal depressed and the shift lever in P, push the engine switch. Check that the engine starts normally from any power source mode status.

OK:

Engine starts normally from any power source mode status.

NEXT -- Continue to next step.

7. PROBLEM SYMPTOMS TABLE

(a) Refer to the Problem Symptoms Table Problem Symptoms Table.

Result





B -- Go to step 9
A -- Continue to next step.

8. OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) Terminals of ECU Smart Key System (for Start Function).

(b) Data List/Active Test Smart Key System (for Start Function).

NEXT -- Continue to next step.

9. REPAIR OR REPLACE

NEXT -- Continue to next step.

10. CONFIRMATION TEST

NEXT -- END