DTC P3107-213: Lost Communication with Airbag System Control Module: 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 if DTCs are output.

   Result

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

5. Turn the power switch off.

B → See step   10 

A: Go to next step 

1. Connect an oscilloscope between the airbag ECU assembly terminals specified in the table below.
2. Turn the power switch on (READY).
3. Measure the waveform.
   Fig 1: Checking Airbag ECU Assembly With Waveform Reference

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Item	Contents
   Terminal	L16-14 (GSW2) - L16-25 (E1)
   Equipment Setting	5V/DIV., 500ms/DIV.
   Condition	Power switch on (READY)

   Result

   Result	Proceed to
   The waveform appears as shown in the illustration above (Fig 1).	A
   The waveform differs from the one shown in the illustration above (Fig 1).	B

   TEXT IN ILLUSTRATION
   
   

   *a	Component with harness connected (Airbag ECU Assembly)

4. Turn the power switch off.

B → See step   6 

A: Go to next step 

NEXT: Go to next step 

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 if DTCs are output.

   Result

   Result		Proceed to
   DTC P3107-213 is not output.		A
   DTC P3107-213 is output.		B

5. Turn the power switch off.

B → See step   8 

A: Go to next step 

Refer to CHECK FOR INTERMITTENT PROBLEMS

NG → REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA 

OK → See step   8 

1. Disconnect connector L16 from the airbag ECU assembly.
2. Measure the resistance according to the value(s) in the table below.
   Fig 2: Checking Airbag ECU Assembly

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   L16-14 (GSW2) - L16-25 (E1)	Power switch off	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *a	Component without harness connected (Airbag ECU Assembly)

3. Connect the airbag ECU assembly connector.

NG → See step   9 

OK: Go to next step 

1. Disconnect connector L5 from the power management control ECU.
2. Disconnect connector L16 from the airbag ECU assembly.
3. Measure the resistance according to the value(s) in the table below.
   Fig 3: Checking Harness And Connector (Power Management Control ECU - Airbag ECU Assembly)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   L5-29 (ABFS) or L16-14 (GSW2) - Body ground and other terminals	Power switch off	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *a	Rear view of wire harness connector (to Power Management Control ECU)
   *b	Rear view of wire harness connector (to Airbag ECU Assembly)

4. Connect the airbag ECU assembly connector.
5. Connect the power management control ECU connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   8