DTC P3107-213: 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 DTC CHART 

NO: Go to next step 

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.

NG → See step   6 

OK: 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. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
4. Read output DTCs.

   Result

   DTC P3107-213 is output.

YES → See step   8 

NO: Go to next step 

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

NG → REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA 

OK → See step   8 

1. Turn the power switch off.
   Fig 2: Identifying Center Airbag Sensor Assembly Connector K44

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect connector K44 from the center airbag sensor assembly.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Specified Condition
   GSW2 (K44-14) - E1 (K44-25)	10 kΩ or more

NG → REPLACE CENTER AIRBAG SENSOR ASSEMBLY 

OK: Go to next step 

1. Disconnect connector A54 from the hybrid vehicle control ECU.
   Fig 3: Identifying Hybrid Vehicle Control ECU Connector A54

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Specified Condition
   GSW2 (K44-14) or E1 (K44-25) - Body ground	10 kΩ or more

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   8