DTC B1608/84: Front Satellite Sensor Bus LH Initialization Incomplete; DTC B1617/84: Lost Communication with Front Airbag Sensor LH; DTC B1618/84: Front Airbag Sensor LH Initialization Incomplete (08/2010 - 08/2011): Procedure

1. Turn the engine switch off.
2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
3. Check that the connectors are properly connected to the center airbag sensor and the front airbag sensor LH.

   OK

   The connectors are properly connected.

NG → CONNECT CONNECTORS PROPERLY 

OK: Go to next step 

1. Disconnect the connectors from the center airbag sensor and front airbag sensor LH.
2. Check that the connectors (on the center airbag sensor side and front airbag sensor LH side) are not damaged.

   OK

   The connectors are not deformed or damaged.

NG → REPLACE HARNESS AND CONNECTOR 

OK: Go to next step 

Fig 1: Identifying Center Airbag Sensor E47 & Front Air Bag Sensor Connector Terminal A7

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   A7-2 (+SL) - Body ground	Engine switch on (IG)	Below 1 V
   A7-1 (-SL) - Body ground	Engine switch on (IG)	Below 1 V

3. Turn the engine switch off.
4. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
5. Using a service wire, connect terminals 30 (+SL) and 28 (-SL) of connector B.
   NOTE:

   Do not forcibly insert the service wire into the terminals of the connector when connecting a service wire.

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A7-2 (+SL) - A7-1 (-SL)	Always	Below 1 Ω

7. Disconnect the service wire from connector B.
8. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A7-2 (+SL) - A7-1 (-SL)	Always	1 MΩ or higher
   A7-2 (+SL) - Body ground	Always	1 MΩ or higher
   A7-1 (-SL) - Body ground	Always	1 MΩ or higher

NG → See step   5 

OK: Go to next step 

Fig 2: Checking Front Airbag Sensor LH

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Connect the connectors to the center airbag sensor.
2. Interchange the front airbag sensor LH with RH and connect the connectors to them.
3. Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
4. Turn the engine switch on (IG), and wait for at least 60 seconds.
5. Clear the DTCs stored in the memory. Refer to DTC CHECK / CLEAR .
6. Turn the engine switch off.
7. Turn the engine switch on (IG), and wait for at least 60 seconds.
8. Check for DTCs. Refer to DTC CHECK / CLEAR .
   RESULT
   
   

   Result	Proceed to
   DTC B1617 or B1618 is output	A
   DTC B1612 or B1613 is output	B
   DTC B1612, B1613, B1617 and B1618 are not output	C

   HINT: 

   Codes other than DTC B1612, B1613, B1617 and B1618 may be output at this time, but they are not related to this check.

A → See step   6 

B → See step   7 

C → See step   8 

Fig 3: Identifying Engine Room Main Wire Connector Terminal AE1 And Center Airbag Sensor E47 Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the instrument panel wire connector from the engine room main wire.
2. Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   AE1-2 (+SL) - Body ground	Engine switch on (IG)	Below 1 V
   AE1-1 (-SL) - Body ground	Engine switch on (IG)	Below 1 V

4. Turn the engine switch off.
5. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
6. Using a service wire, connect terminals 30 (+SL) and 28 (-SL) of connector B.
   NOTE:

   Do not forcibly insert the service wire into the terminals of the connector when connecting a service wire.

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   AE1-2 (+SL) - AE1-1 (-SL)	Always	Below 1 Ω

8. Disconnect the service wire from connector B.
9. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   AE1-2 (+SL) - AE1-1 (-SL)	Always	1 MΩ or higher
   AE1-2 (+SL) - Body ground	Always	1 MΩ or higher
   AE1-1 (-SL) - Body ground	Always	1 MΩ or higher

NG → REPLACE INSTRUMENT PANEL WIRE 

OK → REPLACE ENGINE ROOM MAIN WIRE