Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: Lost Communication with Airbag System Control Module Signal Plausibility Failure (P310764)

Toyota Corolla Cross (2022-2024) Service Manual / Engine & Hybrid System / Hybrid / Battery Control / Hybrid Control System / Lost Communication with Airbag System Control Module Signal Plausibility Failure (P310764)

DESCRIPTION

Refer to the description for DTC P310711.

Click here

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

Note

P310764

Lost Communication with Airbag System Control Module Signal Plausibility Failure

Abnormal communication signal:

Communication from the airbag ECU assembly stopped and signal plausibility failure has been detected for a certain period.

(1 trip detection logic)
  • Wire harness or connector
  • Airbag ECU assembly
  • Hybrid vehicle control ECU

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

  1. Connect the GTS to the DLC3.
  2. Turn the ignition switch to ON and turn the GTS on.
  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  4. Turn the ignition switch off and wait for 2 minutes or more.
  5. Turn the ignition switch to ON and turn the GTS on.
  6. With ignition switch to ON and wait for 2 minutes or more.
  7. Enter the following menus: Powertrain / Hybrid Control / Utility / All Readiness.
  8. 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

Refer to the wiring diagram for DTC P310711.

Click here

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

GO TO DTC CHART (AIRBAG SYSTEM)

A

2.

CLEAR DTC

Click here

NEXT

3.

CHECK DTC OUTPUT (HYBRID CONTROL)

(a) Check for DTCs.

Powertrain > Hybrid Control > Trouble Codes
Result

Proceed to

P310764 is not output

A

P310764 is output again

B
B

GO TO STEP 5

A

4.

CHECK FOR INTERMITTENT PROBLEMS

Click here

OK

REPLACE AIRBAG ECU ASSEMBLY

NG

REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

5.

CHECK AIRBAG ECU ASSEMBLY (CHECK WAVEFORM)

Click here

Result

Proceed to

The waveform appears as shown in the illustration.

A

The waveform differs from the one shown in the illustration.

B
A

REPLACE HYBRID VEHICLE CONTROL ECU

B

6.

CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR)

Click here

NG

CONNECT SECURELY
OK

7.

CHECK CONNECTOR CONNECTION CONDITION (AIRBAG ECU ASSEMBLY CONNECTOR)

Click here

NG

CONNECT SECURELY
OK

8.

CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - AIRBAG ECU ASSEMBLY)

Click here

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

9.

CHECK HARNESS AND CONNECTOR (AIRBAG ECU ASSEMBLY - BODY GROUND)

Click here

OK

REPLACE AIRBAG ECU ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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