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

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1. 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

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1. 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.

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1. ENGINE SWITCH ON (IG)

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1. 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

GO TO CAN COMMUNICATION SYSTEM

A

1. 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

A

1. CHECK FOR DTCS (SMART KEY 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 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

A

1. 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

A

1. 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

A

1. OVERALL ANALYSIS AND TROUBLESHOOTING*

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

(b) Terminals of ECU (See page )

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1. REPAIR OR REPLACE

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1. CONFIRMATION TEST

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END