Airbag System

SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: B1603/83: Front Satellite Sensor Bus RH Initialization Incomplete

DTC B1603/83 - Front Satellite Sensor Bus RH Initialization Incomplete

DTC B1612/83 - Lost Communication with Front Airbag Sensor RH

DTC B1613/83 - Front Airbag Sensor RH Initialization Incomplete

DESCRIPTION

The front airbag sensor RH circuit consists of the center airbag sensor assembly and front airbag sensor RH.
The front airbag sensor RH detects impacts to the vehicle and sends signals to the center airbag sensor assembly to determine if the airbag should be deployed.
DTC B1603/83, B1612/83, or B1613/83 is recorded when a malfunction is detected in the front airbag sensor RH circuit.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. CHECK DTC
(a) Turn the engine switch on (IG), and wait for at least 60 seconds.
(b) Turn the engine switch off.
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 engine switch off and then on (IG) again.
(c) Turn the engine switch on (IG), and wait for at least 60 seconds.
(d) Check the DTCs DTC Check / Clear.
Result:

HINT:
- DTCs indicating communication errors will be changed to DTCs indicating errors in initialization by turning the engine switch off and then on (IG) again.
- Codes other than DTC B1603, B1613, or 83 and B1618/84 may be output at this time, but they are not related to this check.

C -- USE SIMULATION METHOD TO CHECK
B -- GO TO DTC B1618/84
A -- Continue to next step.
2. CHECK CONNECTION OF CONNECTORS
(a) Turn the engine 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 RH.
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 RH.
(b) Check that the connectors (on the center airbag sensor assembly side and front airbag sensor RH 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 VEHICLE CONDITION
(a) Check whether or not the vehicle is equipped with the rear side airbag.
Result:
A
with the rear side airbag
B
without the rear side airbag
B -- CHECK FRONT AIRBAG SENSOR RH (OPEN)
A -- Continue to next step.
5. CHECK FRONT AIRBAG SENSOR RH CIRCUIT (OPEN)

(a) Using a service wire, connect terminals 29 (+SR) and 27 (-SR) of connector B.
NOTE: Do not forcibly insert a service wire into the terminals of the connector when connecting the wire.
(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.
6. CHECK FRONT AIRBAG SENSOR RH CIRCUIT (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.
7. CHECK FRONT AIRBAG SENSOR RH CIRCUIT (SHORT TO B+)

(a) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
(b) Turn the engine 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.
8. CHECK FRONT AIRBAG SENSOR RH CIRCUIT (SHORT TO GROUND)

(a) Turn the engine 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.
9. CHECK FRONT AIRBAG SENSOR RH

(a) Connect the connectors to the center airbag sensor assembly.
(b) Interchange the front airbag sensor LH with RH 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 engine switch on (IG), and wait for at least 60 seconds.
(e) Clear the DTCs stored in the memory DTC Check / Clear.
(f) Turn the engine switch off.
(g) Turn the engine switch on (IG), and wait for at least 60 seconds.
(h) Check the DTCs DTC Check / Clear.
Result:

HINT: Codes other than DTC B1603, B1612, B1613, or 83 and B1608, B1617, B1618, or 84 may be output at this time, but they are not related to this check.

B -- REPLACE FRONT AIRBAG SENSOR RH
A -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY
C -- USE SIMULATION METHOD TO CHECK
10. 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
11. 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
12. CHECK INSTRUMENT PANEL WIRE (SHORT TO B+)

(a) Turn the engine 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 engine 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
13. 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
14. CHECK FRONT AIRBAG SENSOR RH (OPEN)

NG -- CHECK INSTRUMENT PANEL WIRE (OPEN)
OK -- Continue to next step.
15. CHECK FRONT AIRBAG SENSOR RH (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.
16. CHECK FRONT AIRBAG SENSOR RH (SHORT TO B+)

NG -- CHECK INSTRUMENT PANEL WIRE (SHORT TO B+)
OK -- Continue to next step.
17. CHECK FRONT AIRBAG SENSOR RH (SHORT TO GROUND)

NG -- CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND)
OK -- Continue to next step.
18. CHECK FRONT AIRBAG SENSOR RH

NG -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE
OK -- REPAIR OR REPLACE ENGINE ROOM MAIN WIRE
20. 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
21. CHECK INSTRUMENT PANEL WIRE (SHORT TO B+)

NG -- REPAIR OR REPLACE INSTRUMENT PANEL WIRE
OK -- REPAIR OR REPLACE ENGINE ROOM MAIN WIRE
22. 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