How To Proceed With Troubleshooting

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

HINT
* Use the following procedure to troubleshoot the 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 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 to the next step.

NEXT -- Continue to next step.

4. CHECK CAN COMMUNICATION SYSTEM*

(a) Use the Techstream to check if the CAN communication system is functioning normally Initial Inspection and Diagnostic Overview.

Result:





B -- Go To CAN COMMUNICATION SYSTEM CAN Communication System
A -- Continue to next step.

5. CHECK LIN COMMUNICATION SYSTEM*

(a) Use the Techstream to check if the LIN communication system (LIN) is functioning normally Initial Inspection and Diagnostic Overview.

Result:





B -- Go To LIN COMMUNICATION SYSTEM LIN Communication System
A -- Continue to next step.

6. CHECK FOR DTC*

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

(b) Clear the DTC.

(c) Recheck for DTCs.

Result:





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

7. INSPECT BASIC OPERATION

(a) Check that the engine starts normally when the engine switch is pushed while the brake pedal is depressed and the shift lever is in P.

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

HINT
Without depressing the brake pedal, push the engine switch repeatedly. The power source mode should change from off to on (ACC), to on (IG) and back to off.

With the brake pedal depressed, push the engine switch. The engine should start regardless of the original power source mode.

OK:

Engine can start normally.

NEXT -- Continue to next step.

8. PROBLEM SYMPTOMS TABLE

Result:





B -- Go to step 10
A -- Continue to next step.

9. 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.

10. REPAIR OR REPLACE

NEXT -- Continue to next step.

11. CONFIRMATION TEST

NEXT -- END