- Stereo component equalizer assembly branch line or connector
- Power source circuit of stereo component equalizer assembly
- Stereo component equalizer assembly ground circuit
- Stereo component equalizer assembly
| Last Modified: 12-11-2024 | 6.11:8.1.0 | Doc ID: RM100000002P215 |
| Model Year Start: 2025 | Model: GR Corolla | Prod Date Range: [09/2024 - ] |
| Title: NETWORKING: CAN COMMUNICATION SYSTEM (for Gasoline Model): Active Noise Control ECU Communication Stop Mode; 2025 MY Corolla Corolla Hatchback GR Corolla [09/2024 - ] | ||
|
Active Noise Control ECU Communication Stop Mode |
DESCRIPTION
|
Detection Item |
Symptom |
Trouble Area |
|---|---|---|
|
Active Noise Control ECU Communication Stop Mode |
Communication stop for "Active Noise Control" is indicated on the "Communication Bus Check" screen of the GTS.
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|
|
WIRING DIAGRAM
w/ Stereo Component Amplifier:
w/o Stereo Component Amplifier:
CAUTION / NOTICE / HINT
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
NOTICE:
-
Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output.
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![2025 MY Corolla Corolla Hatchback GR Corolla [09/2024 - ]; NETWORKING: CAN COMMUNICATION SYSTEM (for Gasoline Model): HOW TO PROCEED WITH TROUBLESHOOTING](/t3Portal/stylegraphics/info.gif)
- Before measuring the resistance of the CAN bus, turn the ignition switch off and leave the vehicle for 1 minute or more without operating the key or any switches, or opening or closing the doors. After that, disconnect the cable from the negative (-) battery terminal and leave the vehicle for 10 minutes or more before measuring the resistance.
-
After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) battery terminal.
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When disconnecting and reconnecting the battery.
HINT:
When disconnecting and reconnecting the battery, there is an automatic learning function that completes learning when the respective system is used.
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-
Some parts must be initialized and set when replacing or removing and installing parts.
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After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again.
DTC check procedure: Turn the ignition switch to ON and wait for 1 minute or more. Then operate the suspected malfunctioning system and drive the vehicle at 60 km/h (37 mph) or more for 5 minutes or more.
-
After the repair, perform the CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed as normal.
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- Inspect the fuses for circuits related to this system before performing the following procedure.
HINT:
- Before disconnecting related connectors for inspection, push in on each connector body to check that the connector is not loose or disconnected.
- When a connector is disconnected, check that the terminals and connector body are not cracked, deformed or corroded.
PROCEDURE
|
1. |
CHECK VEHICLE TYPE |
(a) Check vehicle type.
|
Result |
Proceed to |
|---|---|
|
w/ Stereo Component Amplifier |
A |
|
w/o Stereo Component Amplifier |
B |
| B |
|
|
|
2. |
CHECK FOR OPEN IN CAN BUS LINES (STEREO COMPONENT EQUALIZER ASSEMBLY BRANCH LINE) |
(a) Disconnect the cable from the negative (-) battery terminal.
(b) Disconnect the I241 stereo component equalizer assembly connector.
|
(c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
| NG |
|
REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (STEREO COMPONENT EQUALIZER ASSEMBLY) |
|
|
3. |
CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) |
|
(a) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
(b) Reconnect the cable to the negative (-) battery terminal.
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I241-14 (+B) - Body ground |
Always |
11 to 14 V |
|
I241-27 (IGP) - Body ground |
Ignition switch ON |
11 to 14 V |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) |
|
4. |
CHECK FOR OPEN IN CAN BUS LINES (STEREO COMPONENT EQUALIZER ASSEMBLY BRANCH LINE) |
(a) Disconnect the cable from the negative (-) battery terminal.
(b) Disconnect the I242 stereo component equalizer assembly connector.
|
(c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
| NG |
|
REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (STEREO COMPONENT EQUALIZER ASSEMBLY) |
|
|
5. |
CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) |
|
(a) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
(b) Reconnect the cable to the negative (-) battery terminal.
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I242-15 (+B) - Body ground |
Always |
11 to 14 V |
|
I242-29 (IGP) - Body ground |
Ignition switch ON |
11 to 14 V |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) |
|
|