| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM10000000271X5 |
| 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): Speaker Circuit; 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - ] | ||
|
Speaker Circuit |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Depending on the parts that are replaced during vehicle inspection or maintenance, performing 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](/t3Portal/stylegraphics/info.gif)
PROCEDURE
|
1. |
CHECK SPEAKER (OPERATION CHECK) |
|
(a) Enter diagnostic mode. Click here
|
|
(b) Select "Failure Diagnosis" from the "Service Menu" screen.
(c) Select "System Check" from the "Failure Diagnosis" screen.
(d) Select "SPCheck ON" from the "System Check Mode" screen and perform speaker check.
OK:
Each speaker outputs sound from the selected audio source properly.
|
Result |
Proceed to |
|---|---|
|
Front No. 1 speaker assembly or front No. 2 speaker assembly does not outputs sound |
A |
|
Rear speaker assembly does not outputs sound |
B |
| B |
|
|
|
2. |
CHECK HARNESS AND CONNECTOR (SPEAKER CIRCUIT) |
(a) Disconnect the I184 radio and display receiver assembly connector.
(b) Disconnect the L1 and K1 front No. 1 speaker assembly connectors.
(c) Disconnect the I77 and I76 front No. 2 speaker assembly connectors.
(d) Measure the resistance according to the value (s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I184-1 (FR+) - I76-4 (TWR+) |
Always |
Below 1 Ω |
|
I184-5 (FR-) - I76-2 (TWR-) |
Always |
Below 1 Ω |
|
I184-2 (FL+) - I77-4 (TWL+) |
Always |
Below 1 Ω |
|
I184-6 (FL-) - I77-2 (TWL-) |
Always |
Below 1 Ω |
|
L1-2 - I77-3 (+) |
Always |
Below 1 Ω |
|
L1-1 - I77-1 (-) |
Always |
Below 1 Ω |
|
K1-2 - I76-3 (+) |
Always |
Below 1 Ω |
|
K1-1 - I76-1 (-) |
Always |
Below 1 Ω |
|
I184-1 (FR+) or I76-4 (TWR+) - Body ground |
Always |
10 kΩ or higher |
|
I184-5 (FR-) or I76-2 (TWR-) - Body ground |
Always |
10 kΩ or higher |
|
I184-2 (FL+) or I77-4 (TWL+) - Body ground |
Always |
10 kΩ or higher |
|
I184-6 (FL-) or I77-2 (TWL-) - Body ground |
Always |
10 kΩ or higher |
|
L1-2 or I77-3 (+) - Body ground |
Always |
10 kΩ or higher |
|
L1-1 or I77-1 (-) - Body ground |
Always |
10 kΩ or higher |
|
K1-2 or I76-3 (+) - Body ground |
Always |
10 kΩ or higher |
|
K1-1 or I76-1 (-) - Body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
3. |
INSPECT FRONT NO. 1 SPEAKER ASSEMBLY |
Click here
| NG |
|
|
|
4. |
REPLACE FRONT NO. 2 SPEAKER ASSEMBLY |
(a) Replace the front No. 2 speaker assembly with a new or known good one.
Click here
(b) Check if the malfunction disappears.
|
Result |
Proceed to |
|---|---|
|
Malfunction disappears |
A |
|
Malfunction occurs |
B |
| A |
|
END (FRONT NO. 2 SPEAKER ASSEMBLY IS DEFECTIVE) |
| B |
|
REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY
|
|
5. |
CHECK HARNESS AND CONNECTOR (SPEAKER CIRCUIT) |
(a) Disconnect the I186 radio and display receiver assembly connector.
(b) Disconnect the M4 and N4 rear speaker assembly connectors.
(c) Measure the resistance according to the value (s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I186-1 (RR+) - M4-2 |
Always |
Below 1 Ω |
|
I186-3 (RR-) - M4-1 |
Always |
Below 1 Ω |
|
I186-2 (RL+) - N4-2 |
Always |
Below 1 Ω |
|
I186-6 (RL-) - N4-1 |
Always |
Below 1 Ω |
|
I186-1 (RR+) or M4-2 - Body ground |
Always |
10 kΩ or higher |
|
I186-3 (RR-) or M4-1 - Body ground |
Always |
10 kΩ or higher |
|
I186-2 (RL+) or N4-2 - Body ground |
Always |
10 kΩ or higher |
|
I186-6 (RL-) or N4-1 - Body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
6. |
INSPECT REAR SPEAKER ASSEMBLY |
Click here
| OK |
|
REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY
|
| NG |
|
|
|