B16F1

SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM: B16F1; Passenger Side Belt Warning Indicator Circuit; 2013 MY FR-S [03/2012 -]
B16F1 - Passenger Side Belt Warning Indicator Circuit

DESCRIPTION

The seat belt buckle switch RH signal circuit consists of the airbag ECU assembly and combination meter assembly.

DTC B16F1 is stored when a malfunction is detected for the seat belt buckle switch RH signal circuit.





WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work Service Precautions.

PROCEDURE

1. CHECK CONNECTORS

(a) Turn the ignition switch off.

(b) 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.

(c) Check that the connectors are properly connected to the airbag ECU assembly and combination meter assembly.

OK:

The connectors are properly connected.

HINT
If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.

(d) Disconnect the connectors from the airbag ECU assembly and combination meter assembly.

(e) Check that the terminals of connectors are not damaged.

OK:

The connectors are not deformed or damaged.

NG -- REPLACE INSTRUMENT PANEL WIRE
OK -- Continue to next step.

2. CHECK INSTRUMENT PANEL WIRE (OPEN)

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









Standard Resistance:





NG -- REPLACE INSTRUMENT PANEL WIRE
OK -- Continue to next step.

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

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









(b) Turn the ignition switch to ON.

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

Standard Voltage:





(d) Turn the ignition switch off.

(e) 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.

NG -- REPLACE INSTRUMENT PANEL WIRE
OK -- Continue to next step.

4. CHECK INSTRUMENT PANEL WIRE (SHORT TO GROUND)

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









Standard Resistance:





NG -- REPLACE INSTRUMENT PANEL WIRE
OK -- Continue to next step.

5. CHECK PASSENGER SEAT BELT WARNING LIGHT CONDITION

(a) Connect the connectors to the combination meter assembly.









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

(c) Check the passenger seat belt warning light operation after the ignition switch is turned to ON.

OK:

Blinks for 6 seconds and then goes off

NG -- REPLACE COMBINATION METER ASSEMBLY Removal
OK -- Continue to next step.

6. CHECK DTC

(a) Turn the ignition switch off.









(b) 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.

(c) Connect the connector to the airbag ECU assembly.

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

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

(f) Turn the ignition switch off.

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

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

OK:

DTC B16F1 is not output.

HINT
Codes other than DTC B16F1 may be output at this time, but they are not related to this check.

NG -- REPLACE AIRBAG ECU ASSEMBLY Removal

OK -- USE SIMULATION METHOD TO CHECK