Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: How To Proceed With Troubleshooting

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Vehicle Interior / Seat / Seat Heater System(for Hv Model) / How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

  • Use the following procedure to troubleshoot the seat heater system.
  • *: Use the Techstream.

PROCEDURE

1.

VEHICLE BROUGHT TO WORKSHOP
NEXT

2.

CUSTOMER PROBLEM ANALYSIS

(a) Interview the customer to confirm the problem.

Click here

NEXT

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.

NEXT

4.

CHECK FOR DTC*

(a) Clear the DTCs.

Body Electrical > Air Conditioner > Clear DTCs

(b) Check for DTCs.

Body Electrical > Air Conditioner > Trouble Codes

Result

Proceed to

DTCs are not output

A

Air conditioning system DTCs are output

B

Seat heater system DTCs are output

C
B

GO TO AIR CONDITIONING SYSTEM

C

GO TO DIAGNOSTIC TROUBLE CODE CHART

A

5.

PROBLEM SYMPTOMS TABLE

(a) Refer to Problem Symptoms Table.

Click here

Result

Proceed to

Fault is not listed in Problem Symptoms Table

A

Fault is listed in Problem Symptoms Table

B
B

GO TO STEP 7

A

6.

OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) Operation Check

Click here

(b) Terminals of ECU

Click here

(c) Data List / Active Test

Click here

(d) Inspection

NEXT

7.

REPAIR OR REPLACE
NEXT

8.

CONFIRMATION TEST
NEXT

END
    Dtc Check / Clear

    Operation Check

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