Second-Row Seat Belt Warning Light Does Not Illuminate

1. Sit at each position of the second-row seat.
2. Fasten and detach the second-row seat belt buckle.

Does the seat belt warning light display vary according to the operation of the seat belt buckle?

Yes:  It may be a temporary poor contact. Check the contacting condition of harness and connector.

No:  Go to  2.

1. Sit at each position of the second-row seat.
2. Using Subaru Select Monitor, select [Data monitor] and display the data of [Rear side (right) seat belt state], [Rear side (center) seatbelt state] and [Rear side (left) seat belt state]. Ref. to COMBINATION METER (DIAGNOSTICS)>DATA MONITOR .
3. Fasten and detach the second-row seat belt buckle at each position, and read the data of the seat belt switch.

Does the display vary according to the operation of the seat belt buckle?

Yes:  Go to  5.

No:  Go to  3.

Check the second-row seating sensor mat. Ref. to SEAT BELT SYSTEM>Second Seat Belt>INSPECTION>CHECK SEATING SENSOR MAT .

Is the inspection result normal?

Yes:  Go to  4.

No:  Replace the second-row seating sensor mat together with the seat pad assembly cushion rear.

Perform unit inspection for second-row seat belt switches. Ref. to SEAT BELT SYSTEM>Second Seat Belt>INSPECTION>CHECK SECOND-ROW SEAT BELT SWITCH .

Is the check result OK?

Yes:  Go to  5.

No:  Replace the defective seat belt INN.

1. Disconnect the hazard switch assembly connector.
2. Turn the ignition switch to ON.
3. Measure the input voltage of the hazard switch assembly.

Connector & terminal 

(i333) No. 10 (+) - Chassis ground (-):

(i333) No. 9 (+) - Chassis ground (-):

Is the voltage 10 V or more?

Yes:  Go to  6.

No:  Repair or replace the harness.

1. Turn the ignition switch to OFF.
2. Measure the resistance between the hazard switch assembly and chassis ground.

Connector & terminal 

(i333) No. 16 - Chassis ground:

Is the resistance less than 10 Ω?

Yes:  Go to  7.

No:  Repair or replace the harness.

1. Disconnect the harness of the hazard switch assembly and combination meter.
2. Measure the resistance between the hazard switch assembly and combination meter.

Connector & terminal 

(i333) No. 14 - (i10) No. 12:

Is the resistance less than 10 Ω?

Yes:  Go to  8.

No:  Repair or replace the harness.

1. Disconnect the combination meter connector and the second-row seat belt buckle switch connector.
2. Check for short circuit to battery, open circuit and short circuit to ground between the combination meter and the second-row seat belt buckle switch.

Connector & terminal 

RH: 

(i10) No. 8 - (R404) No. 1:

(R404) No. 2 - Chassis ground:

CTR: 

(i10) No. 9 - (R554) No. 2:

(R554) No. 1 - Chassis ground:

LH: 

(i10) No. 10 - (R403) No. 1:

(R403) No. 2 - Chassis ground:

Is the harness normal?

Yes:  Go to  9.

No:  Repair or replace the harness.

1. Remove the hazard switch assembly, and install a properly operating hazard switch assembly (new hazard switch assembly).
2. Connect the connector and then turn the ignition switch to ON.

Is the hazard switch assembly properly displayed?

Yes:  Replace the hazard switch assembly.

No:  Replace the combination meter.