| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM10000000292XC |
| Model Year Start: 2023 | Model: GR Corolla | Prod Date Range: [11/2022 - ] |
| Title: AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for Single Knob Type): Speaker Circuit; 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 - ] | ||
|
Speaker Circuit |
DESCRIPTION
If there is a short in a speaker circuit, the radio and display receiver assembly detects it and stops output to the speakers.
As a result, sound cannot be heard from the speakers even if there is no malfunction in the radio and display receiver assembly or speakers.
WIRING DIAGRAM
for 6 Speakers
for 2 Speakers
CAUTION / NOTICE / HINT
NOTICE:
-
Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed. Refer to Precaution for Audio and Visual System.
Click here
![2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - ]; AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for Single Knob Type): PRECAUTION](/t3Portal/stylegraphics/info.gif)
PROCEDURE
|
1. |
CHECK MODEL |
(a) Choose the model to be inspected.
|
Result |
Proceed to |
|---|---|
|
for 6 Speakers with DCM (Telematics Transceiver) |
A |
|
for 2 Speakers |
B |
|
for 6 Speakers without DCM (Telematics Transceiver) |
C |
| B |
|
| C |
|
|
|
2. |
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 |
|
|
|
3. |
CHECK HARNESS AND CONNECTOR (SPEAKER CIRCUIT) |
(a) Disconnect the I71 radio and display receiver assembly connector.
(b) Disconnect the K1 and L1 front No. 1 speaker assembly connectors.
(c) Disconnect the I76 and I77 front No. 2 speaker assembly connectors.
(d) Disconnect the I144 DCM (telematics transceiver) connector.
(e) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I71-2 (FL+) - I77-4 (TWL+) |
Always |
Below 1 Ω |
|
I71-7 (FL-) - I77-2 (TWL-) |
Always |
Below 1 Ω |
|
I71-1 (FR+) - I144-1 (SPI+) |
Always |
Below 1 Ω |
|
I71-6 (FR-) - I144-2 (SPI-) |
Always |
Below 1 Ω |
|
I144-3 (SPO+) - I76-4 (TWR+) |
Always |
Below 1 Ω |
|
I144-4 (SPO-) - I76-2 (TWR-) |
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 |
|
I71-2 (FL+) or I77-4 (TWL+) - Body ground |
Always |
10 kΩ or higher |
|
I71-7 (FL-) or I77-2 (TWL-) - Body ground |
Always |
10 kΩ or higher |
|
I71-1 (FR+) or I144-1 (SPI+) - Body ground |
Always |
10 kΩ or higher |
|
I71-6 (FR-) or I144-2 (SPI-) - Body ground |
Always |
10 kΩ or higher |
|
I144-3 (SPO+) or I76-4 (TWR+) - Body ground |
Always |
10 kΩ or higher |
|
I144-4 (SPO-) or I76-2 (TWR-) - 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 |
|
|
4. |
INSPECT DCM (TELEMATICS TRANSCEIVER) |
(a) Remove the DCM (telematics transceiver).
Click here
|
(b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
| NG |
|
|
|
5. |
INSPECT FRONT NO. 1 SPEAKER ASSEMBLY |
Click here
| NG |
|
|
|
6. |
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 |
|
|
7. |
CHECK HARNESS AND CONNECTOR (SPEAKER CIRCUIT) |
(a) Disconnect the I71 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 |
|---|---|---|
|
I71-3 (RL+) - N4-2 |
Always |
Below 1 Ω |
|
I71-8 (RL-) - N4-1 |
Always |
Below 1 Ω |
|
I71-4 (RR+) - M4-2 |
Always |
Below 1 Ω |
|
I71-9 (RR-) - M4-1 |
Always |
Below 1 Ω |
|
I71-3 (RL+) or N4-2 - Body ground |
Always |
10 kΩ or higher |
|
I71-8 (RL-) or N4-1 - Body ground |
Always |
10 kΩ or higher |
|
I71-4 (RR+) or M4-2 - Body ground |
Always |
10 kΩ or higher |
|
I71-9 (RR-) or M4-1 - Body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
8. |
INSPECT REAR SPEAKER ASSEMBLY |
Click here
| OK |
|
| NG |
|
|
9. |
CHECK HARNESS AND CONNECTOR (SPEAKER CIRCUIT) |
(a) Disconnect the I71 radio and display receiver assembly connector.
(b) Disconnect the K1 and L1 front No. 1 speaker assembly connectors.
(c) Disconnect the I144 DCM (telematics transceiver) connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I71-1 (FR+) - I144-1 (SPI+) |
Always |
Below 1 Ω |
|
I71-6 (FR-) - I144-2 (SPI-) |
Always |
Below 1 Ω |
|
I144-3 (SPO+) - K1-2 |
Always |
Below 1 Ω |
|
I144-4 (SPO-) - K1-1 |
Always |
Below 1 Ω |
|
L1-2 - I71-2 (FL+) |
Always |
Below 1 Ω |
|
L1-1 - I71-7 (FL-) |
Always |
Below 1 Ω |
|
I71-1 (FR+) or I144-1 (SPI+) - Body ground |
Always |
10 kΩ or higher |
|
I71-6 (FR-) or I144-2 (SPI-) - Body ground |
Always |
10 kΩ or higher |
|
I144-3 (SPO+) or K1-2 - Body ground |
Always |
10 kΩ or higher |
|
I144-4 (SPO-) or K1-1 - Body ground |
Always |
10 kΩ or higher |
|
L1-2 or I71-2 (FL+) - Body ground |
Always |
10 kΩ or higher |
|
L1-1 or I71-7 (FL-) - Body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
10. |
INSPECT DCM (TELEMATICS TRANSCEIVER) |
(a) Remove the DCM (telematics transceiver).
Click here
|
(b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
| NG |
|
|
|
11. |
INSPECT FRONT NO. 1 SPEAKER ASSEMBLY |
Click here
| OK |
|
| NG |
|
|
12. |
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.
|
Not Operating Speaker |
Proceed to |
|---|---|
|
Front No. 1 speaker assembly or front No. 2 speaker assembly |
A |
|
Rear speaker assembly |
B |
| B |
|
|
|
13. |
CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - FRONT NO. 1 SPEAKER ASSEMBLY - FRONT NO. 2 SPEAKER ASSEMBLY) |
(a) Disconnect the I71 radio and display receiver assembly connector.
(b) Disconnect the K1 and L1 front No. 1 speaker assembly connectors.
(c) Disconnect the I76 and I77 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 |
|---|---|---|
|
I71-1 (FR+) - I76-4 (TWR+) |
Always |
Below 1 Ω |
|
I71-6 (FR-) - I76-2 (TWR-) |
Always |
Below 1 Ω |
|
I71-2 (FL+) - I77-4 (TWL+) |
Always |
Below 1 Ω |
|
I71-7 (FL-) - I77-2 (TWL-) |
Always |
Below 1 Ω |
|
K1-2 - I76-3 (+) |
Always |
Below 1 Ω |
|
K1-1 - I76-1 (-) |
Always |
Below 1 Ω |
|
L1-2 - I77-3 (+) |
Always |
Below 1 Ω |
|
L1-1 - I77-1 (-) |
Always |
Below 1 Ω |
|
I71-1 (FR+) or I76-4 (TWR+) - Body ground |
Always |
10 kΩ or higher |
|
I71-6 (FR-) or I76-2 (TWR-) - Body ground |
Always |
10 kΩ or higher |
|
I71-2 (FL+) or I77-4 (TWL+) - Body ground |
Always |
10 kΩ or higher |
|
I71-7 (FL-) or I77-2 (TWL-) - 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 |
|
L1-2 or I77-3 (+) - Body ground |
Always |
10 kΩ or higher |
|
L1-1 or I77-1 (-) - Body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
14. |
INSPECT FRONT NO. 1 SPEAKER ASSEMBLY |
Click here
| NG |
|
|
|
15. |
REPLACE FRONT NO. 2 SPEAKER ASSEMBLY |
Click here
OK:
Malfunction disappears.
| OK |
|
END |
| NG |
|
|
16. |
CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - REAR SPEAKER ASSEMBLY) |
(a) Disconnect the I71 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 |
|---|---|---|
|
I71-4 (RR+) - M4-2 |
Always |
Below 1 Ω |
|
I71-9 (RR-) - M4-1 |
Always |
Below 1 Ω |
|
I71-3 (RL+) - N4-2 |
Always |
Below 1 Ω |
|
I71-8 (RL-) - N4-1 |
Always |
Below 1 Ω |
|
I71-4 (RR+) or M4-2 - Body ground |
Always |
10 kΩ or higher |
|
I71-9 (RR-) or M4-1 - Body ground |
Always |
10 kΩ or higher |
|
I71-3 (RL+) or N4-2 - Body ground |
Always |
10 kΩ or higher |
|
I71-8 (RL-) or N4-1 - Body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
17. |
INSPECT REAR SPEAKER ASSEMBLY |
Click here
| OK |
|
| NG |
|
|
|