Supplemental Restraint System. Dtc B1608/84 Front Satellite Sensor Bus Lh Initialization Incomplete

The front airbag sensor LH circuit consists of the center airbag sensor assembly and front airbag sensor LH.
The front airbag sensor LH detects impacts to the vehicle and sends signals to the center airbag sensor assembly to determine if the airbag should be deployed.
DTC B1608/84, B1617/84, or B1618/84 is recorded when a malfunction is detected in the front airbag sensor RH circuit.

DTC No.	DTC Detecting Condition	Trouble Area
B1608/84 B1617/84 B1618/84	The center airbag sensor assembly receives a line short circuit signal, an open circuit signal, a short circuit to ground signal or a short circuit to B+ signal in the front airbag sensor LH circuit for 2 seconds. Front airbag sensor LH malfunction Center airbag sensor assembly malfunction	Instrument panel wire Engine room main wire Front airbag sensor LH Center airbag sensor assembly

WIRING DIAGRAM

Camry. Acv40 Gsv40.Supplemental Restraint System.Airbag System.
Dtc
B1608/84 Front Satellite Sensor Bus Lh Initialization Incomplete

INSPECTION PROCEDURE

1.CHECK DTC

Turn the ignition switch to the ON position, and wait for at least 60 seconds.

Turn the ignition switch to the LOCK position.
HINT:
If a communication error occurs, DTCs for both the LH and RH sides will be stored simultaneously. To identify the malfunctioning area, turn the ignition switch to the LOCK position and then ON position again.

Turn the ignition switch to the ON position, and wait for at least 60 seconds.

Check the DTCs (CAMRY_ACV40 RM000000XFE059X.html).
Result:
Result
Proceed to
DTC B1608, B1618, or 84 is output.
A
DTC B1613/83 is output.
B
DTC B1608, B1618, or 84 and B1613/83 are not output.
C
HINT:
1. DTCs indicating communication errors will be changed to DTCs indicating errors in initialization by turning the ignition switch to the LOCK position and then ON position again.
2. Codes other than DTC B1608, B1618, or 84 and B1613/83 may be output at this time, but they are not related to this check.

GO TO DTC B1613/83 (CAMRY_ACV40 RM0000027RR00FX.html)

USE SIMULATION METHOD TO CHECK (CAMRY_ACV40 RM000000XFD050X.html)

A

2.CHECK CONNECTION OF CONNECTORS

Turn the ignition switch to the LOCK position.

Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.

Check that the connectors are properly connected to the center airbag sensor assembly and the front airbag sensor LH.
OK:
The connectors are properly connected.

CONNECT CONNECTORS PROPERLY

OK

3.CHECK CONNECTORS

Disconnect the connectors from the center airbag sensor assembly and front airbag sensor LH.

Check that the connectors (on the center airbag sensor assembly side and front airbag sensor LH side) are not damaged.
OK:
The connectors are not deformed or damaged.

REPAIR OR REPLACE WIRE HARNESS

OK

4.CHECK FRONT AIRBAG SENSOR LH (OPEN)

Using a service wire, connect terminals 30 (+SL) and 28 (-SL) of connector B.
NOTICE:
Do not forcibly insert a service wire into the terminals of the connector when connecting.

Measure the resistance according to the value(s) in the table below.
Standard resistance:
Tester Connection
Condition
Specified Condition
A13-2 (+SL) - A13-1 (-SL)
Always
Below 1 Ω

Go to step 9

OK

5.CHECK FRONT AIRBAG SENSOR LH (SHORT)

Disconnect the service wire from connector B.

Measure the resistance according to the value(s) in the table below.
Standard resistance:
Tester Connection
Condition
Specified Condition
A13-2 (+SL) - A13-1 (-SL)
Always
1 MΩ or higher

Go to step 10

OK

6.CHECK FRONT AIRBAG SENSOR LH (SHORT TO B+)

Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.

Turn the ignition switch to the ON position.

Measure the voltage according to the value(s) in the table below.
Standard voltage:
Tester Connection
Condition
Specified Condition
A13-2 (+SL) - Body ground
Ignition switch ON
Below 1 V
A13-1 (-SL) - Body ground
Ignition switch ON
Below 1 V

Go to step 11

OK

7.CHECK FRONT AIRBAG SENSOR LH (SHORT TO GROUND)

Turn the ignition switch to the LOCK position.

Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.

Measure the resistance according to the value(s) in the table below.
Standard resistance:
Tester Connection
Condition
Specified Condition
A13-2 (+SL) - Body ground
Always
1 MΩ or higher
A13-1 (-SL) - Body ground
Always
1 MΩ or higher

Go to step 12

OK

8.CHECK FRONT AIRBAG SENSOR LH

Connect the connectors to the center airbag sensor assembly.

Interchange the front airbag sensor RH with LH and connect the connectors to them.

Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.

Turn the ignition switch to the ON position, and wait for at least 60 seconds.

Clear the DTCs stored in the memory (CAMRY_ACV40 RM000000XFE059X.html).

Turn the ignition switch to the LOCK position.

Turn the ignition switch to the ON position, and wait for at least 60 seconds.

Check the DTCs (CAMRY_ACV40 RM000000XFE059X.html).
Result:
Result
Proceed to
DTC B1608, B1617, B1618, or 84 is output.
A
DTC B1603, B1612, B1613, or 83 is output.
B
DTC B1603, B1612, B1613, or 83 and B1608, B1617, B1618, or 84 are not output.
C
HINT:
Codes other than DTC B1608, B1617, B1618, or 84 and B1603, B1612, B1613, or 83 may be output at this time, but they are not related to this check.

REPLACE CENTER AIRBAG SENSOR ASSEMBLY (CAMRY_ACV40 RM000000UWV031X.html)

REPLACE FRONT AIRBAG SENSOR LH (CAMRY_ACV40 RM000000UWZ02YX.html)

USE SIMULATION METHOD TO CHECK (CAMRY_ACV40 RM000000XFD050X.html)

9.CHECK INSTRUMENT PANEL WIRE (OPEN)

Disconnect the instrument panel wire connector from the engine room main wire.
HINT:
The service wire has already been inserted into connector B.

Measure the resistance according to the value(s) in the table below.
Standard resistance:
Tester Connection
Condition
Specified Condition
AE4-3 (+SL) - AE4-4 (-SL)
Always
Below 1 Ω

REPAIR OR REPLACE INSTRUMENT PANEL WIRE

REPAIR OR REPLACE ENGINE ROOM MAIN WIRE

10.CHECK INSTRUMENT PANEL WIRE (SHORT)

Disconnect the instrument panel wire connector from the engine room main wire.

Measure the resistance according to the value(s) in the table below.
Standard resistance:
Tester Connection
Condition
Specified Condition
AE4-3 (+SL) - AE4-4 (-SL)
Always
1 MΩ or higher

REPAIR OR REPLACE INSTRUMENT PANEL WIRE

REPAIR OR REPLACE ENGINE ROOM MAIN WIRE

11.CHECK INSTRUMENT PANEL WIRE (SHORT TO B+)

Turn the ignition switch to the LOCK position.

Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.

Disconnect the instrument panel wire connector from the engine room main wire.

Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.

Turn the ignition switch to the ON position.

Measure the voltage according to the value(s) in the table below.
Standard voltage:
Tester Connection
Condition
Specified Condition
AE4-3 (+SL) - Body ground
Ignition switch ON
Below 1 V
AE4-4 (-SL) - Body ground
Ignition switch ON
Below 1 V

REPAIR OR REPLACE INSTRUMENT PANEL WIRE

REPAIR OR REPLACE ENGINE ROOM MAIN WIRE

12.CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND)

Disconnect the instrument panel wire connector from the engine room main wire.

Measure the resistance according to the value(s) in the table below.
Standard resistance:
Tester Connection
Condition
Specified Condition
AE4-3 (+SL) - Body ground
Always
1 MΩ or higher
AE4-4 (-SL) - Body ground
Always
1 MΩ or higher

REPAIR OR REPLACE INSTRUMENT PANEL WIRE

REPAIR OR REPLACE ENGINE ROOM MAIN WIRE

Result	Proceed to
DTC B1608, B1618, or 84 is output.	A
DTC B1613/83 is output.	B
DTC B1608, B1618, or 84 and B1613/83 are not output.	C

Tester Connection	Condition	Specified Condition
A13-2 (+SL) - A13-1 (-SL)	Always	Below 1 Ω

Result	Proceed to
DTC B1608, B1617, B1618, or 84 is output.	A
DTC B1603, B1612, B1613, or 83 is output.	B
DTC B1603, B1612, B1613, or 83 and B1608, B1617, B1618, or 84 are not output.	C