DTC P3107-11: Lost Communication with Airbag System Control Module Circuit Short to Ground [10/2018 - ]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Enter the following menus: Body Electrical / SRS Airbag / Trouble Codes.
4. Check for DTCs.

   Body Electrical > SRS Airbag > Trouble Codes 

   Result

   Result	Proceed to
   Airbag system DTCs are not output.	A
   Airbag system DTCs are output.	B

5. Turn the power switch off.

Result: 

B 

GO TO DTC CHART (AIRBAG SYSTEM). Refer to  DIAGNOSTIC TROUBLE CODE CHART [10/2018 - 10/2020]  Refer to  DIAGNOSTIC TROUBLE CODE CHART [10/2020 - 08/2021]  Refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2021 - 07/2022]  Refer to  DIAGNOSTIC TROUBLE CODE CHART [07/2022 - ] 

Result: 

A 

See step  2

1. Connect an oscilloscope between the hybrid vehicle control ECU terminals specified in the table below.
2. Turn the power switch on (READY).
3. Measure the waveform.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a

   Component with harness connected (Hybrid Vehicle Control ECU)

   -

   -

   Item	Contents
   Terminal	F59-29 (ABFS) - F59-3 (E1)
   Equipment Setting	5 V/DIV., 500 ms./DIV.
   Condition	Power switch on (READY)

   Result

   Result	Proceed to
   The waveform appears as shown in the illustration.	A
   The waveform differs from the one shown in the illustration.	B

4. Turn the power switch off.

Result: 

B 

See step  6

Result: 

A 

See step  3

Refer to PROCEDURE - Step 3

Result

Result: 

NEXT 

See step  4

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
4. Check for DTCs.

   Powertrain > Hybrid Control > Trouble Codes 

   Result

   Result	Proceed to
   P310711 is not output.	A
   P310711 is output.	B

5. Turn the power switch off.

Result: 

B 

REPLACE HYBRID VEHICLE CONTROL ECU. Refer to  REMOVAL [10/2018 - 07/2022]  Refer to  REMOVAL [07/2022 - ] 

Result: 

A 

See step  5

Refer to CHECK FOR INTERMITTENT PROBLEMS [10/2018 - ]

Result

Result: 

OK 

REPLACE HYBRID VEHICLE CONTROL ECU. Refer to  REMOVAL [10/2018 - 07/2022]  Refer to  REMOVAL [07/2022 - ] 

Result: 

NG 

REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA 

1. Disconnect the airbag ECU assembly connector.
2. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component without harness connected (Airbag ECU Assembly)

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   F57-24 (GSW2) - F57-33 (E1)	Power switch off	10 kΩ or higher

3. Reconnect the airbag ECU assembly connector.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE AIRBAG ECU ASSEMBLY. Refer to  REMOVAL [10/2018 - 07/2022]  Refer to  REMOVAL [07/2022 - ] 

Result: 

OK 

See step  7

1. Disconnect the hybrid vehicle control ECU connector.
2. Disconnect the airbag ECU assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Hybrid Vehicle Control ECU)
   *b	Front view of wire harness connector (to Airbag ECU Assembly)

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   F59-29 (ABFS) or F57-24 (GSW2) - Body ground and other terminals	Power switch off	10 kΩ or higher

4. Reconnect the airbag ECU assembly connector.
5. Reconnect the hybrid vehicle control ECU connector.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE HYBRID VEHICLE CONTROL ECU. Refer to  REMOVAL [10/2018 - 07/2022]  Refer to  REMOVAL [07/2022 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR