| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM100000001KLFF |
| Model Year Start: 2020 | Model: GR Corolla | Prod Date Range: [09/2019 - 04/2020] |
| Title: AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for Gasoline Model with Dual Knob Type): B15C3; Speaker Output Short; 2020 MY Corolla Corolla Hatchback GR Corolla [09/2019 - 04/2020] | ||
|
DTC |
B15C3 |
Speaker Output Short |
DESCRIPTION
This DTC is stored when a malfunction occurs in the speakers.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
|---|---|---|---|
|
B15C3 |
Speaker Output Short |
A short is detected in the speaker output circuit |
|
-
*1: for 6 Speakers
*2: except 6 Speakers
*3: w/ Manual (SOS) Switch
WIRING DIAGRAM
for 6 Speakers (for Hatchback Model)
for 6 Speakers (for Sedan Model)
except 6 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
![2020 - 2022 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2022]; AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for Gasoline Model with Dual Knob Type): PRECAUTION](/t3Portal/stylegraphics/info.gif)
-
When replacing the radio and display receiver assembly, always replace it with a new one. If a radio and display receiver assembly which was installed to another vehicle is used, the following may occur:
- A communication malfunction DTC may be stored.
- The radio and display receiver assembly may not operate normally.
-
Before replacing the DCM (telematics transceiver), refer to Registration.
Click here
PROCEDURE
|
1. |
CHECK MODEL |
(a) Choose the model to be inspected.
|
Result |
Proceed to |
|---|---|
|
for 6 Speakers (for Hatchback Model with Manual (SOS) Switch) |
A |
|
for 6 Speakers (for Sedan Model with Manual (SOS) Switch) |
B |
|
for 6 Speakers (w/o Manual (SOS) Switch) |
C |
|
except 6 Speakers (w/ Manual (SOS) Switch) |
D |
|
except 6 Speakers (w/o Manual (SOS) Switch) |
E |
| B |
|
| C |
|
| D |
|
| E |
|
|
|
2. |
CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY, DCM (TELEMATICS TRANSCEIVER) OR SPEAKERS - BODY GROUND) |
(a) Disconnect the I71 radio and display receiver assembly connector.
(b) Disconnect the I144 DCM (telematics transceiver) connector.
(c) Disconnect the I77 front No. 2 speaker assembly LH connector.
(d) Disconnect the N4 and M4 rear speaker assembly connectors.
(e) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
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 |
|
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 |
|
I71-4 (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 |
|
|
3. |
CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) OR SPEAKER - BODY GROUND) |
(a) Disconnect the I144 DCM (telematics transceiver) connector.
(b) Disconnect the I76 front No. 2 speaker assembly RH connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
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 |
| 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:
|
|
| OK |
|
| NG |
|
|
5. |
CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY, DCM (TELEMATICS TRANSCEIVER) OR SPEAKERS - BODY GROUND) |
(a) Disconnect the I71 radio and display receiver assembly connector.
(b) Disconnect the I72 DCM (telematics transceiver) connector.
(c) Disconnect the I77 front No. 2 speaker assembly LH connector.
(d) Disconnect the N4 and M4 rear speaker assembly connectors.
(e) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I71-1 (FR+) or I72-2 (SPI+) - Body ground |
Always |
10 kΩ or higher |
|
I71-6 (FR-) or I72-3 (SPI-) - 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 |
|
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 |
|
|
6. |
CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) OR SPEAKER - BODY GROUND) |
(a) Disconnect the I72 DCM (telematics transceiver) connector.
(b) Disconnect the I76 front No. 2 speaker assembly RH connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I72-5 (SPO+) or I76-4 (TWR+) - Body ground |
Always |
10 kΩ or higher |
|
I72-6 (SPO-) or I76-2 (TWR-) - Body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
7. |
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:
|
|
| OK |
|
| NG |
|
|
8. |
CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY OR SPEAKERS - BODY GROUND) |
(a) Disconnect the I71 radio and display receiver assembly connector.
(b) Disconnect the I76 and I77 front No. 2 speaker assembly connectors.
(c) Disconnect the N4 and M4 rear 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+) 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 |
|
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 |
|
|
9. |
CHECK HARNESS AND CONNECTOR (FRONT NO. 1 SPEAKER ASSEMBLY OR FRONT NO. 2 SPEAKER ASSEMBLY - BODY GROUND) |
(a) Disconnect the K1 and L1 front No. 1 speaker assembly connectors.
(b) Disconnect the I76 and II77 front No. 2 speaker assembly connectors.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
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 II77-3 (+) - Body ground |
Always |
10 kΩ or higher |
|
L1-1 or II77-1 (-) - Body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
10. |
INSPECT FRONT NO. 1 SPEAKER ASSEMBLY |
(a) Remove the front No. 1 speaker assembly.
Click here
(b) Inspect the front No. 1 speaker assembly.
Click here
| NG |
|
|
|
11. |
INSPECT REAR SPEAKER ASSEMBLY |
(a) Remove the rear speaker assembly.
Click here
(b) Inspect the rear speaker assembly.
Click here
| NG |
|
|
|
12. |
REPLACE FRONT NO. 2 SPEAKER ASSEMBLY |
(a) Remove the front No. 2 speaker assembly.
Click here
(b) Inspect the front No. 2 speaker assembly.
Click here
(c) Clear the DTCs.
Body Electrical > Navigation System > Clear DTCs
(d) Recheck for DTCs and check that no DTCs are output.
Body Electrical > Navigation System > Trouble Codes
OK:
No DTCs are output.
| OK |
|
END |
| NG |
|
|
13. |
CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY, DCM (TELEMATICS TRANSCEIVER) OR SPEAKERS - BODY GROUND) |
(a) Disconnect the I54 stereo component amplifier assembly connector.
(b) Disconnect the I72 DCM (telematics transceiver) connector.
(c) Disconnect the I7 front No. 2 speaker assembly LH connector.
(d) Disconnect the I74 and I75 front No. 3 speaker assembly connectors.
(e) Disconnect the M4 and N4 rear speaker assembly connectors.
(f) Disconnect the O71 rear No. 2 speaker assembly connector.
(g) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I54-14 (TWR+) or I72-2 (SPI+) - Body ground |
Always |
10 kΩ or higher |
|
I54-29 (TWR-) or I72-3 (SPI-) - Body ground |
Always |
10 kΩ or higher |
|
I54-12 (TWL+) or I7-2 - Body ground |
Always |
10 kΩ or higher |
|
I54-27 (TWL-) or I7-1 - Body ground |
Always |
10 kΩ or higher |
|
I54-15 (FR+) or I74-4 (+TW) - Body ground |
Always |
10 kΩ or higher |
|
I54-30 (FR-) or I74-2 (-TW) - Body ground |
Always |
10 kΩ or higher |
|
I54-13 (FL+) or I75-4 (+TW) - Body ground |
Always |
10 kΩ or higher |
|
I54-28 (FL-) or I75-2 (-TW) - Body ground |
Always |
10 kΩ or higher |
|
I54-11 (RR+) or M4-2 - Body ground |
Always |
10 kΩ or higher |
|
I54-26 (RR-) or M4-1 - Body ground |
Always |
10 kΩ or higher |
|
I54-9 (RL+) or N4-2 - Body ground |
Always |
10 kΩ or higher |
|
I54-24 (RL-) or N4-1 - Body ground |
Always |
10 kΩ or higher |
|
I54-10 (WF1+) or O71-4 (WF1+) - Body ground |
Always |
10 kΩ or higher |
|
I54-25 (WF1-) or O71-3 (WF1-) - Body ground |
Always |
10 kΩ or higher |
|
I54-8 (WF2+) or O71-2 (WF2+) - Body ground |
Always |
10 kΩ or higher |
|
I54-23 (WF2-) or O71-1 (WF2-) - Body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
14. |
CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) OR SPEAKER - BODY GROUND) |
(a) Disconnect the I72 DCM (telematics transceiver) connector.
(b) Disconnect the I6 front No. 2 speaker assembly RH connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I72-5 (SPO+) or I6-2 - Body ground |
Always |
10 kΩ or higher |
|
I72-6 (SPO-) or I6-1 - Body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
15. |
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:
|
|
| OK |
|
| NG |
|
|
16. |
CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY OR SPEAKERS - BODY GROUND) |
(a) Disconnect the I54 stereo component amplifier assembly connector.
(b) Disconnect the I74 and I75 front No. 3 speaker assembly connectors.
(c) Disconnect the I6 and I7 front No. 2 speaker assembly connectors.
(d) Disconnect the M4 and N4 rear speaker assembly connectors.
(e) Disconnect the O71 rear No. 2 speaker assembly connector.
(f) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I54-15 (FR+) or I74-4 (+TW) - Body ground |
Always |
10 kΩ or higher |
|
I54-30 (FR-) or I74-2 (-TW) - Body ground |
Always |
10 kΩ or higher |
|
I54-13 (FL+) or I75-4 (+TW) - Body ground |
Always |
10 kΩ or higher |
|
I54-28 (FL-) or I75-2 (-TW) - Body ground |
Always |
10 kΩ or higher |
|
I54-14 (TWR+) or I6-2 - Body ground |
Always |
10 kΩ or higher |
|
I54-29 (TWR-) or I6-1 - Body ground |
Always |
10 kΩ or higher |
|
I54-12 (TWL+) or I7-2 - Body ground |
Always |
10 kΩ or higher |
|
I54-27 (TWL-) or I7-1 - Body ground |
Always |
10 kΩ or higher |
|
I54-11 (RR+) or M4-2 - Body ground |
Always |
10 kΩ or higher |
|
I54-26 (RR-) or M4-1 - Body ground |
Always |
10 kΩ or higher |
|
I54-9 (RL+) or N4-2 - Body ground |
Always |
10 kΩ or higher |
|
I54-24 (RL-) or N4-1 - Body ground |
Always |
10 kΩ or higher |
|
I54-10 (WF1+) or O71-4 (WF1+) - Body ground |
Always |
10 kΩ or higher |
|
I54-25 (WF1-) or O71-3 (WF1-) - Body ground |
Always |
10 kΩ or higher |
|
I54-8 (WF2+) or O71-2 (WF2+) - Body ground |
Always |
10 kΩ or higher |
|
I54-23 (WF2-) or O71-1 (WF2-) - Body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
17. |
CHECK HARNESS AND CONNECTOR (FRONT NO. 1 SPEAKER ASSEMBLY OR FRONT NO. 3 SPEAKER ASSEMBLY - BODY GROUND) |
(a) Disconnect the K1 and L1 front No. 1 speaker assembly connectors.
(b) Disconnect the I74 and I75 front No. 3 speaker assembly connectors.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
K1-2 or I74-3 (+) - Body ground |
Always |
10 kΩ or higher |
|
K1-1 or I74-1 (-) - Body ground |
Always |
10 kΩ or higher |
|
L1-2 or I75-3 (+) - Body ground |
Always |
10 kΩ or higher |
|
L1-1 or I75-1 (-) - Body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
18. |
INSPECT FRONT NO. 1 SPEAKER ASSEMBLY |
(a) Remove the front No. 1 speaker assembly.
Click here
(b) Inspect the front No. 1 speaker assembly.
Click here
| NG |
|
|
|
19. |
INSPECT FRONT NO. 2 SPEAKER ASSEMBLY |
(a) Remove the front No. 2 speaker assembly.
Click here
(b) Inspect the front No. 2 speaker assembly.
Click here
| NG |
|
|
|
20. |
INSPECT REAR SPEAKER ASSEMBLY |
(a) Remove the rear speaker assembly.
Click here
(b) Inspect the rear speaker assembly.
Click here
| NG |
|
|
|
21. |
INSPECT REAR NO. 2 SPEAKER ASSEMBLY |
(a) Remove the rear No. 2 speaker assembly.
Click here
(b) Inspect the rear No. 2 speaker assembly.
Click here
| NG |
|
|
|
22. |
REPLACE FRONT NO. 3 SPEAKER ASSEMBLY |
(a) Remove the front No. 3 speaker assembly.
Click here
(b) Inspect the front No. 3 speaker assembly.
Click here
(c) Clear the DTCs.
Body Electrical > Navigation System > Clear DTCs
(d) Recheck for DTCs and check that no DTCs are output.
Body Electrical > Navigation System > Trouble Codes
OK:
No DTCs are output.
| OK |
|
END |
| NG |
|
|
|