Last Modified: 08-21-2023 6.11:8.1.0 Doc ID: RM100000001ARTW
Model Year Start: 2019 Model: Avalon HV Prod Date Range: [04/2018 -           ]
Title: NETWORKING: LIN COMMUNICATION SYSTEM (for HV Model): HOW TO PROCEED WITH TROUBLESHOOTING; 2019 - 2022 MY Avalon HV [04/2018 -        ]

HOW TO PROCEED WITH TROUBLESHOOTING

CAUTION / NOTICE / HINT

HINT:

  • Use the following procedure to troubleshoot the LIN communication system.
  • *: Use the Techstream.

PROCEDURE

1.

VEHICLE BROUGHT TO WORKSHOP
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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 for 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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3.

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 connectors and terminals to make sure that there are no abnormalities such as a loose connection or deformation.

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4.

INSPECT COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*

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

Click here 2019 - 2020 MY Avalon HV [04/2018 - 08/2020]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): DIAGNOSIS SYSTEM 2021 MY Avalon HV [08/2020 - 08/2021]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): DIAGNOSIS SYSTEM 2022 MY Avalon HV [08/2021 -        ]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): DIAGNOSIS SYSTEM

Result

Proceed to

CAN DTCs are not output

A

CAN DTCs are output

B
B

GO TO CAN COMMUNICATION SYSTEM

A

5.

INSPECT COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM*

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

Click here 2019 - 2022 MY Avalon HV [04/2018 -        ]; NETWORKING: LIN COMMUNICATION SYSTEM (for HV Model): DTC CHECK / CLEAR

Result

Proceed to

LIN DTCs are not output

A

LIN DTCs are output

B
B

GO TO DIAGNOSTIC TROUBLE CODE CHART

A

6.

OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) Terminals of ECU

Click here 2019 - 2022 MY Avalon HV [04/2018 -        ]; NETWORKING: LIN COMMUNICATION SYSTEM (for HV Model): TERMINALS OF ECU

(b) Data List / Active Test

Click here 2019 - 2022 MY Avalon HV [04/2018 -        ]; NETWORKING: LIN COMMUNICATION SYSTEM (for HV Model): DATA LIST / ACTIVE TEST

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7.

REPAIR OR REPLACE
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8.

CONFIRMATION TEST
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END