Subaru Impreza 2003 Service Manual page 2917

Step
6 CHECK HARNESS BETWEEN SEAT BELT
SWITCH AND CHASSIS GROUND.
Measure the resistance of harness between
seat belt switch and chassis ground.
Connector & terminal
(R8) No. 2 — Chassis ground:
7 CHECK SEAT BELT SWITCH.
1)Hold the tang plate disconnected from seat
belt buckle.
2)Measure the resistance between seat belt
switch terminals.
Terminals
No. 4 — No. 2:
8 CHECK SEAT BELT SWITCH.
1)Insert the tang plate into seat belt buckle.
2)Measure the resistance between seat belt
switch terminals.
Terminals
No. 1 — No. 2:
9 CHECK OPERATION OF SPEEDOMETER IN
COMBINATION METER.
Check the speedometer indicates vehicle
speed correctly.
10 CHECK VEHICLE MODEL.
Check the model of vehicle.
11 CHECK HARNESS BETWEEN VEHICLE
SPEED SENSOR AND SEAT BELT TIMER
MODULE.
1)Turn the ignition switch to OFF.
2)Disconnect the connector of vehicle speed
sensor.
3)Measure the resistance between vehicle
speed sensor harness connector and seat belt
timer module connector.
Connector & terminal
(B17) No. 1 — (B44) No. 7:
12 CHECK HARNESS BETWEEN VEHICLE
SPEED SENSOR AND SEAT BELT TIMER
MODULE.
Measure the resistance between seat belt
timer module harness connector and chassis
ground.
Connector & terminal
(B44) No. 7 — Chassis ground:
13 CHECK HARNESS BETWEEN TCU AND
SEAT BELT TIMER MODULE.
1)Turn the ignition switch to OFF.
2)Disconnect the connector of TCU.
3)Measure the resistance of harness between
TCU harness connector and seat belt timer
module harness connector
Connector & terminal
(B56) No. 17 — (B44) No. 7:
SEAT BELT WARNING SYSTEM
Is the resistance more than 1
MΩ?
Is the resistance less than 1
Ω?
Is the resistance more than 1
Ω?
Does the speedometer operate
correctly?
Is the vehicle MT model?
Is the resistance less than 10
Ω?
Is the resistance more than 1
MΩ?
Is the resistance less than 10
Ω?
SB-9
Check
Go to step 7.
Go to step 8.
Go to step 9.
Go to step 10.
Go to step 11.
Go to step 12.
Go to step 15.
Go to step 14.
SEAT BELT SYSTEM
Yes No
Repair the open
circuit of harness
between seat belt
switch and chassis
ground.
Replace the inner
belt assembly.
Replace the inner
belt assembly.
Check the speed-
ometer circuit.
Go to step 13.
Repair the open
harness between
vehicle speed sen-
sor and seat belt
timer module.
Repair the short of
harness.
Repair the open
harness between
TCU and seat belt
timer module.