Toyota Avalon Service & Repair Manual: How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

  • Use this procedure to troubleshoot the theft deterrent system.
  • *: Use the Techstream.

PROCEDURE

1.

VEHICLE BROUGHT TO WORKSHOP

NEXT

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 for problem analysis:

What

Vehicle model, system name

When

Date, time, occurrence frequency, whether the problem occurred recently or has been occurring for a long time

Where

Whether the problem occurs at a specific location

Under what conditions?

Whether the doors were locked or unlocked, whether the power switch was on (IG), whether the hybrid control system has started.

How did it happen?

Problem symptoms

NEXT

3.

READ AND SAVE OPERATION HISTORY

NOTICE:

  • If the vehicle or vehicle controls are operated (for example, during initial inspection when the vehicle is brought in for repair) before operation history has been read and saved, the operation history information could be lost.
  • The operation history function uses the current system time of the Techstream and the time counter inside the controlling ECU to calculate the times shown in the operation history. For this reason, before reading the operation history, first make sure that the Techstream system clock is accurately set to the current time.

(a) Read and save operation history using the Techstream.

Click here

Body Electrical > Main Body > Utility

Tester Display

Operation History

NEXT

4.

PRE-CHECK

(a) Measure the auxiliary battery voltage with the power switch off.

Standard Voltage:

11 to 14 V

If the voltage is below 11 V, recharge or replace the auxiliary battery before proceeding to the next step.

(b) Check the fuses and relays.

(c) Check the connector connections and terminals to make sure that there are no abnormalities such as loose connections, deformation, etc.

NEXT

5.

SYMPTOM SIMULATION

NEXT

6.

INSPECT COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*

(a) Using the Techstream, check for CAN communication system DTCs.

Click here

Result

Proceed to

CAN DTCs are not output

A

CAN DTCs are output

B

B

GO TO CAN COMMUNICATION SYSTEM

A

7.

CHECK POWER DOOR LOCK CONTROL SYSTEM

(a) Check the power door lock control system.

Click here

OK:

Power door lock control system is normal

NG

GO TO POWER DOOR LOCK CONTROL SYSTEM

OK

8.

CHECK WIRELESS DOOR LOCK CONTROL SYSTEM

(a) Check the wireless door lock control system.

Click here

OK:

Wireless door lock control system is normal

NG

GO TO WIRELESS DOOR LOCK CONTROL SYSTEM

OK

9.

CHECK SMART KEY SYSTEM (for Entry Function)

(a) Check the smart key system (for Entry Function).

Click here

OK:

Smart key system (for Entry Function) is normal

NG

GO TO SMART KEY SYSTEM (for Entry Function)

OK

10.

CHECK SMART KEY SYSTEM (for Start Function)

(a) Check the smart key system (for Start Function).

Click here

OK:

Smart key system (for Start Function) is normal

NG

GO TO SMART KEY SYSTEM (for Start Function)

OK

11.

CHECK LIGHTING SYSTEM (EXT)

(a) Check the lighting system (EXT).

w/ Cornering Light: Click here

w/o Cornering Light: Click here

OK:

Lighting system (EXT) is normal

Result

Proceed to

OK

A

NG (w/ Cornering Light)

B

NG (w/o Cornering Light)

C

B

GO TO LIGHTING SYSTEM (EXT)

C

GO TO LIGHTING SYSTEM (EXT)

A

12.

CHECK LIGHTING SYSTEM (INT)

(a) Check the lighting system (INT).

Click here

OK:

Lighting system (INT) is normal

NG

GO TO LIGHTING SYSTEM (INT)

OK

13.

CHECK LUGGAGE COMPARTMENT DOOR OPENER SYSTEM

(a) Check the luggage compartment door opener system.

Click here

OK:

Luggage compartment door opener system is normal

NG

GO TO LUGGAGE COMPARTMENT DOOR OPENER SYSTEM

OK

14.

CHECK HORN SYSTEM

(a) Check the horn system.

OK:

Horn system is normal

NG

GO TO HORN SYSTEM

OK

15.

PROBLEM SYMPTOMS TABLE

(a) Refer to Problem Symptoms Table.

Click here

Result

Proceed to

Fault is not listed in Problem Symptoms Table (Fault can be simulated)

A

Fault is not listed in Problem Symptoms Table (Fault cannot be simulated)

B

Fault is listed in Problem Symptoms Table

C

B

CHECK FOR INTERMITTENT PROBLEMS

C

GO TO STEP 17

A

16.

PERFORM OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) System Description

Click here

(b) Terminals of ECU

Click here

(c) Data List / Active Test

Click here

(d) Inspection

NEXT

17.

REPAIR OR REPLACE

NEXT

18.

CONFIRMATION TEST

NEXT

END

    Horn Circuit

    Improper Operation

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