Last Modified: 08-21-2023 6.11:8.1.0 Doc ID: RM100000001BZBJ
Model Year Start: 2019 Model: Avalon HV Prod Date Range: [04/2018 -           ]
Title: SEAT: FRONT POWER SEAT CONTROL SYSTEM (for HV Model with Memory): 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 front power seat control system (w/ Memory).
  • *: Use the Techstream.

PROCEDURE

1.

VEHICLE BROUGHT TO WORKSHOP
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2.

CUSTOMER PROBLEM ANALYSIS

(a) Interview the customer to confirm the problem.

Click here 2019 - 2022 MY Avalon Avalon HV [04/2018 -        ]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: HOW TO PROCEED WITH TROUBLESHOOTING

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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 connector connections and terminals to make sure that there are no abnormalities such as loose connections, deformation, etc.

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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 LIN COMMUNICATION SYSTEM

A

6.

CHECK FOR DTC*

(a) Clear the DTCs.

Click here 2019 - 2022 MY Avalon HV [04/2018 -        ]; SEAT: FRONT POWER SEAT CONTROL SYSTEM (for HV Model with Memory): DTC CHECK / CLEAR

Body Electrical > Driver Seat > Clear DTCs

(b) Recheck for DTCs.

Click here 2019 - 2022 MY Avalon HV [04/2018 -        ]; SEAT: FRONT POWER SEAT CONTROL SYSTEM (for HV Model with Memory): DTC CHECK / CLEAR

Body Electrical > Driver Seat > Trouble Codes

Result

Proceed to

DTCs are not output

A

DTCs are output

B
B

GO TO DIAGNOSTIC TROUBLE CODE CHART

A

7.

PROBLEM SYMPTOMS TABLE

(a) Refer to Problem Symptoms Table.

Click here 2019 - 2022 MY Avalon HV [04/2018 -        ]; SEAT: FRONT POWER SEAT CONTROL SYSTEM (for HV Model with Memory): PROBLEM SYMPTOMS TABLE

Result

Proceed to

Fault is not listed in Problem Symptoms Table

A

Fault is listed in Problem Symptoms Table

B
B

GO TO STEP 9

A

8.

OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) Operation Check

Click here 2019 - 2022 MY Avalon HV [04/2018 -        ]; SEAT: FRONT POWER SEAT CONTROL SYSTEM (for HV Model with Memory): OPERATION CHECK

(b) Data List / Active Test

Click here 2019 - 2022 MY Avalon HV [04/2018 -        ]; SEAT: FRONT POWER SEAT CONTROL SYSTEM (for HV Model with Memory): DATA LIST / ACTIVE TEST

(c) Terminals of ECU

Click here 2019 - 2022 MY Avalon HV [04/2018 -        ]; SEAT: FRONT POWER SEAT CONTROL SYSTEM (for HV Model with Memory): TERMINALS OF ECU

(d) Inspection

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9.

REPAIR OR REPLACE
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10.

CONFIRMATION TEST
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END