Front Satellite Sensor Bus LH Initialization Incomplete - Airbag System (for TMC Made)

SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM (for TMC Made): B1608/84,B1617/84,B1618/84: Front Satellite Sensor Bus LH Initialization Incomplete
B1618/84 - Front Airbag Sensor LH Initialization Incomplete

DESCRIPTION

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 LH circuit.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK DTC

(a) Turn the ignition switch on (IG), and wait for at least 60 seconds.





(b) Clear the DTCs stored in the memory Airbag System (for TMC Made).

(c) Turn the ignition switch off.

(d) Turn the ignition switch on (IG), and wait for at least 60 seconds.

(e) Check the DTCs Airbag System (for TMC Made).

OK:

DTC B1608, B1617, B1618, or 84 is not output.

HINT
Codes other than DTC B1608, B1617, B1618 and 84 may be output at this time, but they are not related to this check.

NG -- CHECK CONNECTION OF CONNECTORS

OK -- USE SIMULATION METHOD TO CHECK Diagnosis System

2. CHECK CONNECTION OF CONNECTORS

(a) Turn the ignition switch off.

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

(c) 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.

NG -- CONNECT CONNECTORS PROPERLY
OK -- Continue to next step.

3. CHECK CONNECTORS

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

(b) 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.

NG -- REPAIR OR REPLACE WIRE HARNESS
OK -- Continue to next step.

4. CHECK FRONT AIRBAG SENSOR LH (OPEN)

(a) 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.

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

Standard resistance:





NG -- CHECK INSTRUMENT PANEL WIRE (OPEN)
OK -- Continue to next step.

5. CHECK FRONT AIRBAG SENSOR LH (SHORT)

(a) Disconnect the service wire from connector B.





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

Standard resistance:





NG -- CHECK INSTRUMENT PANEL WIRE (SHORT)
OK -- Continue to next step.

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

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





(b) Turn the ignition switch on (IG).

(c) Measure the voltage according to the value(s) in the table below.

Standard voltage:





NG -- CHECK INSTRUMENT PANEL WIRE (SHORT TO B+)
OK -- Continue to next step.

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

(a) Turn the ignition switch off.





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

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

Standard resistance:





NG -- CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND)
OK -- Continue to next step.

8. CHECK FRONT AIRBAG SENSOR LH

(a) Connect the connectors to the center airbag sensor assembly.





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

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

(d) Turn the ignition switch on (IG), and wait for at least 60 seconds.

(e) Clear the DTCs stored in the memory Airbag System (for TMC Made).

(f) Turn the ignition switch off.

(g) Turn the ignition switch on (IG), and wait for at least 60 seconds.

(h) Check the DTCs Airbag System (for TMC Made).

Result:





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.

B -- REPLACE FRONT AIRBAG SENSOR LH Removal

A -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY Removal

C -- USE SIMULATION METHOD TO CHECK Diagnosis System

9. CHECK INSTRUMENT PANEL WIRE (OPEN)

(a) Disconnect the instrument panel wire connector from the engine room main wire.





HINT
The service wire has already been inserted into connector B.

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

Standard resistance:





NG -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE

OK -- REPAIR OR REPLACE ENGINE ROOM MAIN WIRE

10. CHECK INSTRUMENT PANEL WIRE (SHORT)

(a) Disconnect the instrument panel wire connector from the engine room main wire.





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

Standard resistance:





NG -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE

OK -- REPAIR OR REPLACE ENGINE ROOM MAIN WIRE

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

(a) Turn the ignition switch off.





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

(c) Disconnect the instrument panel wire connector from the engine room main wire.

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

(e) Turn the ignition switch on (IG).

(f) Measure the voltage according to the value(s) in the table below.

Standard voltage:





NG -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE

OK -- REPAIR OR REPLACE ENGINE ROOM MAIN WIRE

12. CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND)

(a) Disconnect the instrument panel wire connector from the engine room main wire.





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

Standard resistance:





NG -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE

OK -- REPAIR OR REPLACE ENGINE ROOM MAIN WIRE