Part 4

SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM: B1627, B1628, B1637, B1638, B1647, B1697, B1698; Side Airbag Sensor LH Lost Communication; 2013 MY FR-S [03/2012 -]
B1627 - Side Airbag Sensor LH Lost Communication
B1628 - Side Airbag Sensor LH Initialization
B1637 - Side No. 2 Airbag Sensor LH Lost Communication
B1638 - Side No. 2 Airbag Sensor LH Initialization
B1647 - Side Satellite Sensor Bus Lost Communication (LH)
B1697 - Lost Communication with Side Airbag Sensor LH
B1698 - Side Airbag Sensor LH Initialization Incomplete
(Continued)

37. CHECK SIDE AIRBAG SENSOR ASSEMBLY LH CIRCUIT (SHORT TO GROUND)

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









Standard Resistance:





NG -- CHECK FRONT DOOR WIRE LH (SHORT TO GROUND)
OK -- Continue to next step.

38. CHECK SIDE AIRBAG SENSOR ASSEMBLY LH

(a) Connect the connectors to the rear airbag sensor LH.









(b) Interchange the side airbag sensor assembly LH with RH and connect the connectors.

(c) Connect the cable to the negative (-) battery terminal.

(d) Clear the DTCs stored in memory Reading and Clearing Diagnostic Trouble Codes.

(e) Turn the ignition switch off.

(f) Turn the ignition switch to ON, and wait for at least 60 seconds.

(g) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.

Result:





HINT
Codes other than DTCs B1692, B1693, B1697 and B1698 may be output at this time, but they are not related to this check.

(h) Turn the ignition switch off.

(i) Disconnect the cable from the negative (-) battery terminal.

CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

(j) Return the side airbag sensor assembly LH and RH to their original positions and connect the connectors.

B -- REPLACE SIDE AIRBAG SENSOR ASSEMBLY LH Removal

C -- USE SIMULATION METHOD TO CHECK
A -- Continue to next step.

39. CHECK REAR AIRBAG SENSOR LH

(a) Interchange the rear airbag sensor LH with RH and connect the connectors to them.









(b) Connect the cable to the negative (-) battery terminal.

(c) Clear the DTCs stored in memory Reading and Clearing Diagnostic Trouble Codes.

(d) Turn the ignition switch off.

(e) Turn the ignition switch to ON, and wait for at least 60 seconds.

(f) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.

Result:





HINT
Codes other than DTCs B1692, B1693, B1697 and B1698 may be output at this time, but they are not related to this check.

(g) Turn the ignition switch off.

(h) Disconnect the cable from the negative (-) battery terminal.

CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

(i) Return the rear airbag sensor LH and RH to their original positions and connect the connectors.

B -- REPLACE REAR AIRBAG SENSOR LH Removal

C -- USE SIMULATION METHOD TO CHECK

A -- REPLACE AIRBAG ECU ASSEMBLY Removal

40. CHECK CURRENT DTC

(a) Check for current DTCs Reading and Clearing Diagnostic Trouble Codes.

Result:





HINT
Codes other than current DTCs B1627 and B1637 may be output at this time, but they are not related to this check.

(b) Turn the ignition switch off.

B -- CHECK REAR AIRBAG SENSOR LH
A -- Continue to next step.

41. CHECK SIDE NO. 2 AIRBAG SENSOR ASSEMBLY LH

(a) Disconnect the cable from the negative (-) battery terminal.









CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

(b) Interchange the side No. 2 airbag sensor assembly LH with RH and connect the connectors.

(c) Connect the cable to the negative (-) battery terminal.

(d) Clear the DTCs stored in memory Reading and Clearing Diagnostic Trouble Codes.

(e) Turn the ignition switch off.

(f) Turn the ignition switch to ON, and wait for at least 60 seconds.

(g) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.

Result:





HINT
Codes other than DTCs B1622 and B1627 may be output at this time, but they are not related to this check.

(h) Turn the ignition switch off.

(i) Disconnect the cable from the negative (-) battery terminal.

CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

(j) Return the side No. 2 airbag sensor assembly LH and RH to their original positions and connect the connectors.

B -- REPLACE SIDE NO. 2 AIRBAG SENSOR ASSEMBLY LH Removal

C -- USE SIMULATION METHOD TO CHECK

A -- REPLACE AIRBAG ECU ASSEMBLY Removal

42. CHECK REAR AIRBAG SENSOR LH

(a) Disconnect the cable from the negative (-) battery terminal.









CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

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

(c) Connect the cable to the negative (-) battery terminal.

(d) Clear the DTCs stored in memory Reading and Clearing Diagnostic Trouble Codes.

(e) Turn the ignition switch off.

(f) Turn the ignition switch to ON, and wait for at least 60 seconds.

(g) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.

Result:





HINT
Codes other than DTCs B1632 and B1637 may be output at this time, but they are not related to this check.

(h) Turn the ignition switch off.

(i) Disconnect the cable from the negative (-) battery terminal.

CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

(j) Return the rear airbag sensor LH and RH to their original positions and connect the connectors.

B -- REPLACE REAR AIRBAG SENSOR LH Removal

C -- USE SIMULATION METHOD TO CHECK

A -- REPLACE AIRBAG ECU ASSEMBLY Removal

43. CHECK FRONT DOOR WIRE LH (OPEN)

(a) Disconnect the front door wire LH connector from the floor wire.









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

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

Standard Resistance:





(c) Disconnect the service wire from connector E.

NG -- REPLACE FRONT DOOR WIRE LH

OK -- REPLACE FLOOR WIRE

44. CHECK FRONT DOOR WIRE LH (SHORT)

(a) Disconnect the front door wire LH connector from the floor wire.









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

Standard Resistance:





NG -- REPLACE FRONT DOOR WIRE LH

OK -- REPLACE FLOOR WIRE

45. CHECK FRONT DOOR WIRE LH (SHORT TO B+)

(a) Disconnect the front door wire LH connector from the floor wire.









(b) Connect the cable to the negative (-) battery terminal.

(c) Turn the ignition switch to ON.

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

Standard Voltage:





NG -- REPLACE FRONT DOOR WIRE LH

OK -- REPLACE FLOOR WIRE

46. CHECK FRONT DOOR WIRE LH (SHORT TO GROUND)

(a) Disconnect the front door wire LH connector from the floor wire.









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

Standard Resistance:





NG -- REPLACE FRONT DOOR WIRE LH

OK -- REPLACE FLOOR WIRE