DTC P3107-215: Airbag ECU Communication Circuit Malfunction: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Select the following menu items: Body Electrical / SRS Airbag / Trouble Codes.
4. Check if DTCs are output.

   Result

   Airbag system DTCs are output.

YES → GO TO AIRBAG SYSTEM 

NO: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Read and record the DTCs and freeze frame data.
4. Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
5. Clear the DTCs.

NEXT: Go to next step 

1. Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
2. Check if DTCs are output.

   Result

   P3107-215 is output.

YES → See step   5 

NO: Go to next step 

1. Check for intermittent problems. Refer to CHECK FOR INTERMITTENT PROBLEMS .

YES → REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA 

NO → REPLACE CENTER AIRBAG SENSOR ASSEMBLY 

1. Connect an oscilloscope between the center airbag sensor assembly terminals specified in the table below, and measure the waveform.
   Fig 1: Identifying Center Airbag Sensor Assembly Connector Terminal K44

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Item	Contents
   Terminal	GSW2 (K44-14) - E1 (K44-25)
   Equipment Setting	5 V/DIV., 500 ms./DIV.
   Condition	Power switch on (READY)

   OK

   The waveform appears as shown in the illustration.

OK → See step   7 

NG: Go to next step 

1. Turn the power switch off.
2. Disconnect connector A54 from the hybrid vehicle control ECU.
3. Disconnect connector K44 from the center airbag sensor assembly.
   Fig 2: Identifying A54 And K44 Connectors Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Turn the power switch on (IG).
5. Measure the voltage according to the value(s) in the table below.

   Standard voltage

   Tester Connection	Specified Condition
   GSW2 (K44-14) - Body ground	Below 1 V

   NOTE:

   Turning the power switch on (IG) with the hybrid control ECU connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

6. Turn the power switch off.
7. Measure the resistance according to the value(s) in the table below.

   Standard resistance (Check for open)

   Tester Connection	Specified Condition
   ABFS (A54-96) - GSW2 (K44-14)	Below 1 Ω

   Standard resistance (Check for short)

   Tester Connection	Specified Condition
   ABFS (A54-96) or GSW2 (K44-14) - Body ground	10 kΩ or more

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → REPLACE CENTER AIRBAG SENSOR ASSEMBLY