Toyota Corolla Cross: Lost Communication with Airbag System Control Module Circuit Short to Ground (P310711)
DESCRIPTION
The hybrid vehicle control ECU detects a problem in the collision signal line from the airbag ECU assembly and alerts the driver.
|
DTC No. | Detection Item |
DTC Detection Condition |
Trouble Area | MIL |
Warning Indicate | Note |
|---|---|---|---|---|---|---|
|
P310711 | Lost Communication with Airbag System Control Module Circuit Short to Ground |
Short to ground in the communication circuit: Communication from the airbag ECU assembly stopped and Circuit Low has been detected for a certain period. (1 trip detection logic) |
| Does not come on |
Master Warning: Comes on |
SAE Code: P3107 |
CONFIRMATION DRIVING PATTERN
HINT:
After repairs have been completed, clear the DTCs and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
Click here .gif)
- Connect the GTS to the DLC3.
- Turn the ignition switch to ON and turn the GTS on.
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
- Turn the ignition switch off and wait for 2 minutes or more.
- Turn the ignition switch to ON and turn the GTS on.
- With ignition switch to ON and wait for 2 minutes or more.
- Enter the following menus: Powertrain / Hybrid Control / Utility / All Readiness.
- Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE or N/A, perform driving pattern again.
WIRING DIAGRAM
PROCEDURE
|
1. | CHECK DTC OUTPUT (SRS AIRBAG) |
(a) Check for DTCs.
Body Electrical > SRS Airbag > Trouble Codes| Result |
Proceed to |
|---|---|
| DTCs are not output |
A |
| DTCs are output |
B |
| B | .gif) | GO TO DTC CHART (AIRBAG SYSTEM) |
|
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|
2. | CHECK AIRBAG ECU ASSEMBLY (CHECK WAVEFORM) |
(a) Connect an oscilloscope between the airbag ECU assembly terminals specified in the table below.
(b) Turn the ignition switch to ON (READY).
| (c) Measure the waveform.
Result:
|
|
(d) Turn the ignition switch off.
| B | | GO TO STEP 6 |
|
|
3. | CLEAR DTC |
Click here
|
|
4. | CHECK DTC OUTPUT (HYBRID CONTROL) |
(a) Check for DTCs.
Powertrain > Hybrid Control > Trouble Codes| Result |
Proceed to |
|---|---|
| P310711 is not output |
A |
| P310711 is output |
B |
| B | | REPLACE HYBRID VEHICLE CONTROL ECU |
|
|
5. | CHECK FOR INTERMITTENT PROBLEMS |
Click here
| OK | | REPLACE HYBRID VEHICLE CONTROL ECU |
| NG | | REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA |
|
6. | CHECK AIRBAG ECU ASSEMBLY |
(a) Disconnect the airbag ECU assembly connector.
| (b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
(c) Reconnect the airbag ECU assembly connector.
| NG | | REPLACE AIRBAG ECU ASSEMBLY |
|
|
7. | CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - AIRBAG ECU ASSEMBLY) |
(a) Disconnect the hybrid vehicle control ECU connector.
(b) Disconnect the airbag ECU assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
I249-12 (ABFS) or I47-24 (GSW2) - Body ground and other terminals |
Ignition switch off |
10 kΩ or higher |
(d) Reconnect the airbag ECU assembly connector.
(e) Reconnect the hybrid vehicle control ECU connector.
| OK | | REPLACE HYBRID VEHICLE CONTROL ECU |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
