Toyota Venza: How To Proceed With Troubleshooting

Toyota Venza Service Manual / Theft Deterrent / Keyless Entry / Smart Key System(for Entry Function) / How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

Use the following procedure to troubleshoot the smart key system.
*: Use the Techstream.

PROCEDURE

1.	VEHICLE BROUGHT TO WORKSHOP

2.	CUSTOMER PROBLEM ANALYSIS

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:

What	Vehicle model, system name
When	Date, time, occurrence frequency
Where	Road conditions
Under what conditions?	Running conditions, driving conditions, weather conditions
How did it happen?	Problem symptoms

3.	INSPECT BATTERY VOLTAGE

(a) Measure the vehicle 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.

4.	INSPECT COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*

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

Result	Proceed to
ECU connected, communication line is normally.	A
ECU connected, communication line is malfunctioning.	B

GO TO CAN COMMUNICATION SYSTEM

5.	INSPECT COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM (LIN)*

(a) Use the Techstream to check if the LIN communication system (LIN) is functioning normally (See page ).

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

GO TO LIN COMMUNICATION SYSTEM

6.	CHECK FOR DTC*

(a) Check for DTCs and note any codes that are output.

(b) Clear the DTCs.

(c) Recheck for DTCs. Based on the DTCs output, try to cause the same steering lock system DTC, engine immobiliser system DTC, wireless door lock control system DTC or smart key system (for start function) DTC to be output by simulating the symptoms indicated by the DTCs.

Result	Proceed to
DTC is not output.	A
Steering lock system DTC is output.	B
Engine immobiliser system DTC is output.	C
Wireless door lock control system DTC is output.	D
Smart key system (for start function) DTC is output.	E

GO TO STEERING LOCK SYSTEM

GO TO ENGINE IMMOBILISER SYSTEM

GO TO WIRELESS DOOR LOCK CONTROL SYSTEM

GO TO SMART KEY SYSTEM (for Start Function)

7.	PROBLEM SYMPTOMS TABLE

(a) Refer to Problem Symptoms Table (See page ).

Result	Proceed to
Fault is not listed in problem symptoms table.	A
Fault is listed in problem symptoms table.	B

GO TO STEP 9

8.	OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) Operation Check (See page )

(b) Data List / Active Test (See page )

9.	REPAIR OR REPLACEMENT

10.	CONFIRMATION TEST

END

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