DTC P3107-11: Lost Communication with Airbag System Control Module Circuit Short to Ground [09/2023 - ]: Procedure

Pre-procedure1

• None.

• Check for DTCs.

  Body Electrical > SRS Airbag > Trouble Codes 

  Result

  Result	Proceed to
  DTCs are not output	A
  DTCs are output	B

Post-procedure1

• Turn the ignition switch off.

Result: 

B 

GO TO DTC CHART (AIRBAG SYSTEM). Refer to  DIAGNOSTIC TROUBLE CODE CHART [09/2023 - 12/2023]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [12/2023 - ] 

Result: 

A 

See step  2

Pre-procedure1

• Connect an oscilloscope between the hybrid vehicle control ECU assembly terminals specified in the table below.
• Turn the ignition switch to ON (READY).

• Measure the waveform.

  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

  *a

  Component with harness connected (Hybrid Vehicle Control ECU Assembly)

  -

  -

  Item	Contents
  Terminal	D44-12 (ABFS) - D44-1 (E1)
  Equipment Setting	5 V/DIV., 500 ms./DIV.
  Condition	Ignition 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

Post-procedure1

• Turn the ignition switch off.

Result: 

B 

See step  6

Result: 

A 

See step  3

Refer to PROCEDURE - Step 3

Result

Result: 

NEXT 

See step  4

Pre-procedure1

• None.

• Check for DTCs.

  Powertrain > Hybrid Control > Trouble Codes 

  Result

  Result	Proceed to
  P3107-11 is not output	A
  P3107-11 is output	B

Post-procedure1

• Turn the ignition switch off.

Result: 

B 

REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY. Refer to  REMOVAL [09/2023 - 12/2023]  , or refer to  REMOVAL [12/2023 - ] 

Result: 

A 

See step  5

HINT: 

Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [09/2023 - ]

Result

Result: 

OK 

REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY. Refer to  REMOVAL [09/2023 - 12/2023]  , or refer to  REMOVAL [12/2023 - ] 

Result: 

NG 

REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA 

Pre-procedure1

• Disconnect the airbag ECU assembly connector.

• 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	Condition	Specified Condition	Result
  D47-24 (GSW2) - D47-33 (E1)	Ignition switch off	10 kΩ or higher	kΩ

  Result

  Proceed to
  OK
  NG

Post-procedure1

• Reconnect the airbag ECU assembly connector.

Result: 

NG 

REPLACE AIRBAG ECU ASSEMBLY. Refer to  REMOVAL [09/2023 - 12/2023]  , or refer to  REMOVAL [12/2023 - ] 

Result: 

OK 

See step  7

Pre-procedure1

• Disconnect the hybrid vehicle control ECU assembly connector.
• Disconnect the airbag ECU assembly connector.

• Measure the resistance according to the value(s) in the table below.

  Standard Resistance

  Tester Connection	Condition	Specified Condition	Result
  D44-12 (ABFS) or D47-24 (GSW2) - Body ground and other terminals	Ignition switch off	10 kΩ or higher	kΩ

  Result

  Proceed to
  OK
  NG

Post-procedure1

• Reconnect the airbag ECU assembly connector.
• Reconnect the hybrid vehicle control ECU assembly connector.

Result: 

OK 

REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY. Refer to  REMOVAL [09/2023 - 12/2023]  , or refer to  REMOVAL [12/2023 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR