Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM10000000271WM
Model Year Start: 2023 Model: GR Corolla Prod Date Range: [09/2022 -           ]
Title: AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for Knobless Radio and Display Receiver): HOW TO PROCEED WITH TROUBLESHOOTING; 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 -        ]

HOW TO PROCEED WITH TROUBLESHOOTING

PROCEDURE

1.

VEHICLE BROUGHT TO WORKSHOP
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2.

CUSTOMER PROBLEM ANALYSIS

(a) Confirm problem symptoms

(1) Check the functions for which the problem symptoms occur. (Audio function, etc.)

(2) If the malfunction occurs for radio, there is a high chance of the malfunction being caused by external factors.

HINT:

  • If the malfunction occurs depending on the location, consider transmission lines, overhead wires, neon signs, trucks or motorcycles, wireless transmissions from vehicles, buildings, etc., as the cause.
  • If the malfunction occurs depending on the channel (broadcast station), consider excessively strong radio waves, excessively weak radio waves, poor quality signal, unstable signal, etc., as the cause.
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3.

PRELIMINARY INSPECTION

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

Standard Voltage:

11 to 14 V

(b) Visually inspect for blown fuses, an open or short in a wire harness or improperly connected connectors, etc.

Standard:

Not abnormal

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4.

CHECK CABIN

(a) Check that condensation is not likely to occur in the cabin and that the temperature is not -20°C (-4°F) or lower, or 65°C (149°F) or higher.

HINT:

  • A humid cabin and a rapid change in temperature may lead to condensation. Condensation in the cabin may cause a short circuit.
  • The audio and visual system may not operate normally when the temperature is -20°C (-4°F) or lower, or 65°C (149°F) or higher.
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5.

CHECK AUDIO AND VISUAL SYSTEM NORMAL CONDITION

(a) Refer to Check System Normal Condition.

Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 -        ]; AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for Knobless Radio and Display Receiver): OPERATION CHECK

Result

Proceed to

Symptom is not normal operation

A

Symptom is normal operation

B
B

END
A

6.

CHECK CAN COMMUNICATION SYSTEM

(a) Using the GTS, select "Communication Bus Check" and check that all ECUs and sensors connected to the CAN communication system are displayed on the screen.

Click here 2023 MY Corolla Corolla HV [09/2022 - 11/2022]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): DIAGNOSIS SYSTEM 2023 - 2025 MY Corolla Corolla HV [11/2022 -        ]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): DIAGNOSIS SYSTEM

CAN Bus Check

Result

Proceed to

CAN DTCs are not output

A

CAN DTCs are output

B
B

GO TO CAN COMMUNICATION SYSTEM

A

7.

CHECK FOR DTC

HINT:

Using the GTS, check for DTCs.

(a) Check for DTCs.

(1) Record the results of any DTCs (latest/confirmed)

Body Electrical > Navigation System > Trouble Codes

HINT:

  • Check the freeze frame data for both latest DTCs and confirmed DTCs.
  • If freeze frame data is stored, a snow icon is displayed to the left.

Item

Details

Latest DTC

Indicates the latest malfunction judgment results during the current trip

Confirmed DTC

Indicates DTCs that have been confirmed

(b) Clear the DTCs.

Body Electrical > Navigation System > Clear DTCs

(c) Recheck for DTCs.

(1) Based on the detection conditions of the DTCs, simulate the malfunction conditions and check if the DTCs are output again.

Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 -        ]; AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for Knobless Radio and Display Receiver): DIAGNOSTIC TROUBLE CODE CHART

Body Electrical > Navigation System > Trouble Codes

Result

Proceed to

DTCs are not output (symptoms can be confirmed or reproduced)

A

DTCs are not output (symptoms cannot be confirmed or reproduced)

B

DTCs are output

C
B

GO TO HOW TO PROCEED WITH TROUBLESHOOTING

C

GO TO DIAGNOSTIC TROUBLE CODE CHART

A

8.

CHECK FOR VEHICLE CONTROL HISTORY (RoB)

(a) Using the GTS, check for vehicle control history (RoB).

Body Electrical > Navigation System > Utility

Tester Display

Vehicle Control History (RoB)

(b) If vehicle control history (RoB) is output, record it.

Result

Proceed to

Vehicle control history (RoB) is not output

A

Vehicle control history (RoB) is output

B
B

GO TO VEHICLE CONTROL HISTORY (RoB)

A

9.

PROBLEM SYMPTOMS TABLE

(a) Refer to Problem Symptoms Table.

Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 -        ]; AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for Knobless Radio and Display Receiver): 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 11

A

10.

PERFORM TROUBLESHOOTING BASED ON PROBLEM SYMPTOM

(a) Refer to DIAGNOSIS SYSTEM

Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 -        ]; AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for Knobless Radio and Display Receiver): DIAGNOSIS SYSTEM

(b) Refer to Terminals of ECU

Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 -        ]; AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for Knobless Radio and Display Receiver): TERMINALS OF ECU

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11.

ADJUST, REPAIR OR REPLACE AS NECESSARY
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12.

PERFORM CONFIRMATION TEST

NOTICE:

Depending on the parts that are replaced, performing software update, initialization, registration or calibration may be needed.

Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 -        ]; AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for Knobless Radio and Display Receiver): PRECAUTION

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13.

PROCEDURE AFTER REPLACE
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END