Toyota Venza: How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
- Use the following procedure to troubleshoot the engine immobiliser system.
- *: Using the Techstream.
PROCEDURE
|
1. |
VEHICLE BROUGHT TO WORKSHOP |
|
.gif)
|
2. |
CUSTOMER PROBLEM ANALYSIS |
HINT:
- When 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. |
ENGINE SWITCH ON (IG) |
|
|
5. |
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 is connected, communication is normal |
A |
|
ECU is connected, communication is malfunctioning |
B |
| B | .gif) |
GO TO CAN COMMUNICATION SYSTEM |
|
|
6. |
INSPECT COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM* |
(a) Use the Techstream to check if the LIN communication system is functioning normally.
|
Result |
Proceed to |
|---|---|
|
No DTC is output |
A |
|
DTC is output |
B |
| B | |
GO TO LIN COMMUNICATION SYSTEM |
|
|
7. |
CHECK FOR DTCS (SMART KEY SYSTEM)* |
(a) Check for DTCs and note any codes that are output.
(b) Clear the DTCs (See page .gif)
).
(c) Recheck for DTCs. Based on the DTCs output above, try to duplicate the engine immobiliser system DTC or steering lock system DTC by simulating the symptoms indicated by the DTCs.
|
Result |
Proceed to |
|---|---|
|
No DTCs are output |
A |
|
Steering lock system DTC is output (DTC B2781, B2782 or B2788) |
B |
|
Engine immobiliser system DTC is output (except DTC B2781, B2782 and B2788) |
C |
| B | |
GO TO STEERING LOCK SYSTEM |
| C | |
GO TO DIAGNOSTIC TROUBLE CODE CHART |
|
|
8. |
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 |
| B | |
GO TO DIAGNOSTIC TROUBLE CODE CHART |
| C | |
GO TO SFI SYSTEM |
| D | |
GO TO SFI SYSTEM |
|
|
9. |
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 |
| B | |
GO TO STEP 11 |
|
|
10. |
OVERALL ANALYSIS AND TROUBLESHOOTING* |
(a) Data List / Active Test (See page )
(b) Terminals of ECU (See page )
|
|
11. |
REPAIR OR REPLACE |
|
|
12. |
CONFIRMATION TEST |
| NEXT | |
END |
System Diagram
SYSTEM DIAGRAM
Communication Table
Transmitting ECU (Transmitter)
Receiving ECU (Receiver)
Signal
Communication Method
Certification ECU ...
System Description
SYSTEM DESCRIPTION
1. ENGINE IMMOBILISER SYSTEM DESCRIPTION
The immobiliser system is a theft deterrent system that determines whether to
disable starting of the SFI system based on a comparison o ...
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Diagnosis System
DIAGNOSIS SYSTEM
1. DESCRIPTION
(a) The certification ECU (smart key ECU assembly) and ECM control the vehicle
engine immobiliser system functions. Engine immobiliser system data and Diagnostic
Trouble Codes (DTCs) can be read through the vehicle Data Li ...
Data Signal Circuit between Navigation Receiver Assembly and Extension Module
DESCRIPTION
The stereo component tuner assembly sends the image data signal to the navigation
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WIRING DIAGRAM
PROCEDURE
1.
CHECK NAVIGATION WIRE
(a) Remove the navigation wire (See pag ...
TC and CG Terminal Circuit
DESCRIPTION
Connecting terminals TC and CG of the DLC3 causes the system to enter self-diagnostic
mode. If a malfunction is present, the MIL will blink.
HINT:
When a particular warning light remains blinking, a ground short in the wiring
of terminal TC ...
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