Toyota Venza: How To Proceed With Troubleshooting

Toyota Venza Service Manual / Theft Deterrent / Keyless Entry / Engine Immobiliser System(w/o Smart Key System) / How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

Use the following procedure to troubleshoot the engine immobiliser 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?	Driving conditions, weather conditions
How did it happen?	Problem symptoms

3.	INSPECT BATTERY VOLTAGE

(a) Measure the 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.	CRANK ENGINE FOR MORE THAN 10 SECONDS

5.	CHECK FOR DTCS (ENGINE IMMOBILISER SYSTEM)*

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

(b) Clear the DTCs (See page ).

(c) Recheck for DTCs. Based on the DTCs output above, try to duplicate the engine immobiliser system DTC by simulating the symptoms indicated by the DTCs. Result:

Result	Proceed to
No DTCs are output	A
Engine immobiliser system DTC is output	B

GO TO DIAGNOSTIC TROUBLE CODE CHART

6.	CHECK FOR DTCS (SFI SYSTEM)*

(a) Clear the DTCs (See page ).

(b) Recheck for DTCs.

HINT:

The DTCs for the engine immobiliser system are specified above. If other codes are output, check the DTC chart for the SFI system.

Result	Proceed to
No DTCs are output	A
Engine immobiliser system DTC is output (DTC B2799, B279A or B279C)	B
SFI system DTC is output (except DTC B2799, B279A and B279C) (for 2GR-FE)	C
SFI system DTC is output (except DTC B2799, B279A and B279C) (for 1AR-FE)	D

GO TO DIAGNOSTIC TROUBLE CODE CHART

GO TO SFI SYSTEM

7.	READ VALUE USING TECHSTREAM*

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(d) Enter the following menus: Body Electrical / Immobiliser / Data List.

(e) Read the Data List according to the display on the Techstream.

Immobiliser (Transponder Key ECU Assembly)

Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
Key SW	Unlock warning switch signal/ON or OFF	ON: Key is in ignition key cylinder OFF: No key is in ignition key cylinder	-

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Key SW

Unlock warning switch signal/ON or OFF

ON: Key is in ignition key cylinder

OFF: No key is in ignition key cylinder

OK:

On the Techstream screen, the item changes between ON and OFF according to the chart above.

GO TO DTC B2780

8.	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 10

9.	OVERALL ANALYSIS AND TROUBLESHOOTING*

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

(b) Terminals of ECU (See page )

10.	REPAIR OR REPLACE

11.	CONFIRMATION TEST

END

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Toyota Venza: How To Proceed With Troubleshooting

System Diagram

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