Last Modified: 05-13-2024 |
6.11:8.1.0 |
Doc ID: RM10000000292XB |
Model Year Start: 2023 |
Model: GR Corolla |
Prod Date Range: [11/2022 -
] |
Title: AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (for Single Knob Type): B15C371; Speaker Output Short Actuator Stuck; 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 - ] |
DTC
|
B15C371
|
Speaker Output Short Actuator Stuck
|
DESCRIPTION
This DTC is stored when the stereo component amplifier assembly*1 or radio and display receiver assembly*2 detects a short in a speaker circuit.
DTC No.
|
Detection Item
|
DTC Detection Condition
|
Trouble Area
|
DTC Output from
|
Priority
|
B15C371
|
Speaker Output Short Actuator Stuck
|
When any of the following conditions is met:
(2 trip detection logic)
-
A short is detected in the speaker output circuit
-
Internal direct current is detected in the AMP power IC
|
-
Harness or connector
-
Speaker
-
Stereo Component Amplifier*1
-
Radio and Display Receiver Assembly*2
|
Navigation System
|
A
|
-
*1: w/ "JBL" Sound System
-
*2: w/o "JBL" Sound System
WIRING DIAGRAM
w/ "JBL" Sound System
w/o "JBL" Sound System (for 6 Speakers)
w/o "JBL" Sound System (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.
Click here
PROCEDURE
(a) Choose the model to be inspected.
Result
|
Proceed to
|
w/o "JBL" Sound System with Telematics Transceiver (for 6 Speakers)
|
A
|
w/o "JBL" Sound System (for 2 Speakers)
|
B
|
w/o "JBL" Sound System without Telematics Transceiver
|
C
|
w/ "JBL" Sound System with Telematics Transceiver
|
D
|
A
|
|
|
2.
|
CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - EACH SPEAKER OR DCM (TELEMATICS TRANSCEIVER))
|
(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
|
OK
|
|
|
3.
|
CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) - FRONT NO. 2 SPEAKER ASSEMBLY RH)
|
(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
|
OK
|
|
|
4.
|
CHECK HARNESS AND CONNECTOR (FRONT NO. 1 SPEAKER ASSEMBLY - FRONT NO. 2 SPEAKER ASSEMBLY)
|
(a) Disconnect the K1 and L1 front No. 1 speaker assembly connectors.
(b) Disconnect the I76 and I77 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
|
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 AND CONNECTOR
|
OK
|
|
|
5.
|
INSPECT FRONT NO. 1 SPEAKER ASSEMBLY
|
Click here
OK
|
|
|
6.
|
INSPECT REAR SPEAKER ASSEMBLY
|
Click here
OK
|
|
|
7.
|
INSPECT TELEMATICS TRANSCEIVER
|
(a) Disconnect the telematics transceiver connector.
|
|
*a
|
Component without harness connected
(DCM (Telematics Transceiver))
|
|
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
1 (SPI+) - 3 (SPO+)
|
Always
|
Below 1 Ω
|
2 (SPI-) - 4 (SPO-)
|
Always
|
Below 1 Ω
|
1 (SPI+) - 2 (SPI-)
|
Always
|
10 kΩ or higher
|
3 (SPO+) - 4 (SPO-)
|
Always
|
10 kΩ or higher
|
OK
|
|
|
8.
|
REPLACE FRONT NO.2 SPEAKER ASSEMBLY
|
(a) Replace the speaker assembly with a new or known good one.
Click here
NEXT
|
|
|
(a) Clear the DTCs.
Body Electrical > Navigation System > Clear DTCs
(b) Turn the ignition switch off.
(c) Check for DTCs and proceed to the following step.
Body Electrical > Navigation System > Trouble Codes
Result
|
Proceed to
|
DTCs are not output
|
A
|
DTC B15C371 is output
|
B
|
A |
|
END
|
10.
|
CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - EACH SPEAKER OR DCM (TELEMATICS TRANSCEIVER))
|
(a) Disconnect the I71 radio and display receiver assembly connector.
(b) Disconnect the I144 DCM (telematics transceiver) connector.
(c) Disconnect the L1 front No. 1 speaker assembly LH connector.
(d) 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 L1-2 - Body ground
|
Always
|
10 kΩ or higher
|
I71-7 (FL-) or L1-1 - Body ground
|
Always
|
10 kΩ or higher
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
OK
|
|
|
11.
|
CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) - FRONT NO. 1 SPEAKER ASSEMBLY RH)
|
(a) Disconnect the I144 DCM (telematics transceiver) connector.
(b) Disconnect the K1 front No. 1 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 K1-2 - Body ground
|
Always
|
10 kΩ or higher
|
I144-4 (SPO-) or K1-1 - Body ground
|
Always
|
10 kΩ or higher
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
OK
|
|
|
12.
|
INSPECT FRONT NO. 1 SPEAKER ASSEMBLY
|
Click here
OK
|
|
|
13.
|
INSPECT TELEMATICS TRANSCEIVER
|
(a) Disconnect the telematics transceiver connector.
|
|
*a
|
Component without harness connected
(DCM (Telematics Transceiver))
|
|
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
1 (SPI+) - 3 (SPO+)
|
Always
|
Below 1 Ω
|
2 (SPI-) - 4 (SPO-)
|
Always
|
Below 1 Ω
|
1 (SPI+) - 2 (SPI-)
|
Always
|
10 kΩ or higher
|
3 (SPO+) - 4 (SPO-)
|
Always
|
10 kΩ or higher
|
OK |
|
END
|
14.
|
CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - EACH SPEAKER)
|
(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
|
OK
|
|
|
15.
|
CHECK HARNESS AND CONNECTOR (FRONT NO. 1 SPEAKER ASSEMBLY - FRONT NO. 2 SPEAKER ASSEMBLY)
|
(a) Disconnect the K1 and L1 front No. 1 speaker assembly connectors.
(b) Disconnect the I76 and I77 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 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
|
OK
|
|
|
16.
|
INSPECT FRONT NO. 1 SPEAKER ASSEMBLY
|
Click here
OK
|
|
|
17.
|
INSPECT REAR SPEAKER ASSEMBLY
|
Click here
OK
|
|
|
18.
|
REPLACE FRONT NO.2 SPEAKER ASSEMBLY
|
(a) Replace the speaker assembly with a new or known good one.
Click here
NEXT
|
|
|
(a) Clear the DTCs.
Body Electrical > Navigation System > Clear DTCs
(b) Turn the ignition switch off.
(c) Check for DTCs and proceed to the following step.
Body Electrical > Navigation System > Trouble Codes
Result
|
Proceed to
|
DTCs are not output
|
A
|
DTC B15C371 is output
|
B
|
A |
|
END
|
20.
|
CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER ASSEMBLY - EACH SPEAKER, DCM (TELEMATICS TRANSCEIVER))
|
(a) Disconnect the I54 stereo component amplifier assembly connector.
(b) Disconnect the I144 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 I144-1 (SPI+) - Body ground
|
Always
|
10 kΩ or higher
|
I54-29 (TWR-) or I144-2 (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
|
OK
|
|
|
21.
|
CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) - FRONT NO. 2 SPEAKER ASSEMBLY)
|
(a) Disconnect the I144 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
|
I144-3 (SPO+) or I6-2 - Body ground
|
Always
|
10 kΩ or higher
|
I144-4 (SPO-) or I6-1 - Body ground
|
Always
|
10 kΩ or higher
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
OK
|
|
|
22.
|
CHECK HARNESS AND CONNECTOR (FRONT NO. 1 SPEAKER ASSEMBLY - FRONT NO. 3 SPEAKER ASSEMBLY)
|
(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
|
L1-2 or I75-3 (+) - Body ground
|
Always
|
10 kΩ or higher
|
L1-1 or I75-1 (-) - Body ground
|
Always
|
10 kΩ or higher
|
K1-2 or I74-3 (+) - Body ground
|
Always
|
10 kΩ or higher
|
K1-1 or I74-1 (-) - Body ground
|
Always
|
10 kΩ or higher
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
OK
|
|
|
23.
|
INSPECT FRONT NO. 1 SPEAKER ASSEMBLY
|
Click here
OK
|
|
|
24.
|
INSPECT FRONT NO. 2 SPEAKER ASSEMBLY
|
Click here
OK
|
|
|
25.
|
INSPECT REAR SPEAKER ASSEMBLY
|
Click here
OK
|
|
|
(a) Choose the model to be inspected.
Result
|
Proceed to
|
Sedan
|
A
|
Hatchback
|
B
|
A
|
|
|
27.
|
INSPECT REAR NO.2 SPEAKER ASSEMBLY (for Sedan Model)
|
Click here
OK
|
|
|
28.
|
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:
Tester Connection
|
Condition
|
Specified Condition
|
1 (SPI+) - 3 (SPO+)
|
Always
|
Below 1 Ω
|
2 (SPI-) - 4 (SPO-)
|
Always
|
Below 1 Ω
|
1 (SPI+) - 2 (SPI-)
|
Always
|
10 kΩ or higher
|
3 (SPO+) - 4 (SPO-)
|
Always
|
10 kΩ or higher
|
1 (SPI+) or 3 (SPO+) - Body ground
|
Always
|
10 kΩ or higher
|
2 (SPI-) or 4 (SPO-) - Body ground
|
Always
|
10 kΩ or higher
|
|
|
*a
|
Component without harness connected
(DCM (Telematics Transceiver))
|
|
|
OK
|
|
|
29.
|
REPLACE FRONT NO.3 SPEAKER ASSEMBLY
|
(a) Replace the speaker assembly with a new or known good one.
Click here
NEXT
|
|
|
(a) Clear the DTCs.
Body Electrical > Navigation System > Clear DTCs
(b) Turn the ignition switch off.
(c) Check for DTCs and proceed to the following step.
Body Electrical > Navigation System > Trouble Codes
Result
|
Proceed to
|
DTCs are not output
|
A
|
DTC B15C371 is output
|
B
|
A |
|
END
|
|