2004 SUBARU FORESTER sensor

SB-8
SEAT BELT SYSTEM
Seat Belt Warning System
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. 1 — Chassis ground:Is the resistance more than 1
MΩ?Go to step 7.Repair the open
circuit of harness
between seat belt
switch and chas-
sis 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.
Te r m i n a l s
(R8) No. 1 — (R8) No. 2:Is the resistance less than 1
Ω?Go to step 8.Replace the inner
belt assembly.
8 CHECK SEAT BELT SWITCH.
1) Insert the tang plate into seat belt buckle.
2) Measure the resistance between seat belt
switch terminals.
Te r m i n a l s
(R8) No. 1 — (R8) No. 2:Is the resistance more than 1
MΩ?Go to step 9.Replace the inner
belt assembly.
9 CHECK OPERATION OF SPEEDOMETER IN
COMBINATION METER.
Check the speedometer indicates vehicle
speed correctly.Does the speedometer operate
correctly?Go to step 10.Check the speed-
ometer circuit.
10 CHECK VEHICLE MODEL.
Check the model of vehicle.Is the vehicle MT model? Go to step 11.Go to step 13.
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:Is the resistance less than 10
Ω?Go to step 12.Repair the open
harness between
vehicle speed sen-
sor and seat belt
timer module.
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:Is the resistance more than 1
MΩ?Go to step 15.Repair the short of
harness.
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:Is the resistance less than 10
Ω?Go to step 14.Repair the open
harness between
TCU and seat belt
timer module. Step Check Yes No

INSTRUMENTATION/DRIVER INFO
IDI
Page
1. General Description ....................................................................................2
2. Combination Meter System .........................................................................3
3. Combination Meter Assembly ...................................................................10
4. Speedometer.............................................................................................13
5. Tachometer ...............................................................................................14
6. Fuel Gauge ...............................................................................................15
7. Water Temperature Gauge .......................................................................16
8. Ambient Sensor.........................................................................................17

IDI-4
INSTRUMENTATION/DRIVER INFO
Combination Meter System
B: INSPECTION
CAUTION:
When measuring voltage and resistance of the ECM, TCM, or each sensor, use a tapered pin with a
diameter of less than 0.64 mm (0.025 in) in order to avoid poor contact. Do not insert the pin more
than 2 mm (0.08 in).
1. SYMPTOM CHART
Symptom Repair order Reference
Combination meter assembly does not operate. (1) Power supply
(2) Ground circuit POWER SUPPLY AND
GROUND CIRCUIT,
INSPECTION, Combi-
nation Meter System.>
Speedometer does not operate. (1) (MT model) Vehicle speed sensor
(AT model) TCM
(2) Harness
(3) SpeedometerMT model: 5, CHECK VEHICLE
SPEED SENSOR,
INSPECTION, Combi-
nation Meter System.>
AT model: 6, CHECK TRANSMIS-
SION CONTROL MOD-
ULE (TCM),
INSPECTION, Combi-
nation Meter System.>
Tachometer does not operate. (1) ECM
(2) Harness
(3) Tachometer ENGINE CONTROL
MODULE (ECM),
INSPECTION, Combi-
nation Meter System.>
Fuel gauge does not operate. (1) Fuel level sensor
(2) Harness
(3) Fuel gauge FUEL LEVEL SEN-
SOR, INSPECTION,
Combination Meter
System.>
Water temperature gauge does not operate. (1) Engine coolant temperature sensor
(2) Harness
(3) Water temperature gauge ENGINE COOLANT
TEMPERATURE SEN-
SOR, INSPECTION,
Combination Meter
System.>
Outside temperature indicator does not operate. (1) Ambient sensor
(2) Harness
(3) Combination meter OUTSIDE TEMPERA-
TURE INDICATOR,
INSPECTION, Combi-
nation Meter System.>

IDI-5
INSTRUMENTATION/DRIVER INFO
Combination Meter System
2. CHECK POWER SUPPLY AND GROUND CIRCUIT
3. CHECK VEHICLE SPEED SENSOR
Step Check Yes No
1 CHECK POWER SUPPLY FOR COMBINA-
TION METER.
1) Remove the combination meter. IDI-10, REMOVAL, Combination Meter
Assembly.>
2) Disconnect the combination meter harness
connector.
3) Turn the ignition switch to ON.
4) Measure the voltage between combination
meter connector and chassis ground.
Connector & terminal
(i10) No. 9 (+) — Chassis ground (
−):Is the voltage more than 10 V? Go to step 2.Check the harness
for open or short
between ignition
switch and combi-
nation meter.
2 CHECK POWER SUPPLY FOR COMBINA-
TION METER.
Measure the voltage between combination
meter connector and chassis ground.
Connector & terminal
(i10) No. 8 (+) — Chassis ground (
−):Is the voltage more than 10 V? Go to step 3.Check the harness
for open or short
between fuse and
combination
meter.
3 CHECK GROUND CIRCUIT OF COMBINA-
TION METER.
1) Turn the ignition switch to OFF.
2) Measure the resistance of harness
between combination meter connector and
chassis ground.
Connector & terminal
(i10) No. 10 — Chassis ground:Is the resistance less than 10
Ω?Replace the com-
bination meter
printed circuit.Repair the wiring
harness.
Step Check Yes No
1 CHECK VEHICLE SPEED SENSOR.
1) Lift-up the vehicle and support it with rigid
racks.
2) Remove the combination meter with har-
ness connector.
3) Drive the vehicle at a speed greater than 20
km/h (12 MPH).
Warning:
Be careful not to get caught in the running
wheels.
4) Measure the voltage between combination
meter connector and chassis ground.
Connector & terminal
(i10) No. 12 (+) — Chassis ground (
−):Is the voltage 1 V ← → 5 V? Check the speed-
ometer. IDI-13, INSPEC-
TION, Speedome-
ter.>Go to step 2.
2 CHECK VEHICLE SPEED SENSOR POWER
SUPPLY.
1) Turn the ignition switch to OFF.
2) Disconnect the vehicle speed sensor har-
ness connector.
3) Turn the ignition switch to ON.
4) Measure the voltage between vehicle
speed sensor connector and engine ground.
Connector & terminal
(B17) No. 3 (+) — Engine ground (
−):Is the voltage more than 10 V? Go to step 3.Check the harness
for open or short
between ignition
switch and vehicle
speed sensor.

IDI-6
INSTRUMENTATION/DRIVER INFO
Combination Meter System
4. CHECK TRANSMISSION CONTROL MODULE (TCM)
3 CHECK HARNESS BETWEEN VEHICLE
SPEED SENSOR AND ENGINE GROUND.
1) Turn the ignition switch to OFF.
2) Measure the resistance between vehicle
speed sensor connector and engine ground.
Connector & terminal
(B17) No. 2 — Engine ground:Is the resistance less than 10
Ω?Go to step 4.Repair the wiring
harness.
4 CHECK HARNESS BETWEEN VEHICLE
SPEED SENSOR AND COMBINATION
METER.
1) Disconnect the connector from combination
meter.
2) Measure the resistance between vehicle
speed sensor harness connector and combi-
nation meter harness connector.
Connector & terminal
(B17) No. 1 — (i10) No. 12:Is the resistance less than 10
Ω?Replace the vehi-
cle speed sensor.Repair the wiring
harness.
Step Check Yes No
1 CHECK TCM SIGNAL.
1) Lift-up the vehicle and support it with rigid
racks.
2) Drive the vehicle faster than 10 km/h (6
MPH).
Warning:
Be careful not to get caught in the running
wheels.
3) Measure the voltage between TCM con-
nector and chassis ground.
Connector & terminal
(B56) No. 17 (+) — Chassis ground (
−):Is the voltage 1 V ← → 5 V? Go to step 2.Check TCM. to 4AT(H4SO)-2,
Basic Diagnostic
Procedure.>
2 CHECK HARNESS BETWEEN TCM AND
COMBINATION METER.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from TCM and
combination meter.
3) Measure the resistance between TCM har-
ness connector and combination meter har-
ness connector.
Connector & terminal
(B56) No. 17 — (i10) No. 12:Is the resistance less than 10
Ω?Check the speedo
meter. 13, INSPECTION,
Speedometer.>Repair the wiring
harness. Step Check Yes No

IDI-7
INSTRUMENTATION/DRIVER INFO
Combination Meter System
5. CHECK ENGINE CONTROL MODULE (ECM)
6. CHECK FUEL LEVEL SENSOR
Step Check Yes No
1 CHECK ECM SIGNAL.
1) Start the engine.
2) Measure the voltage between ECM con-
nector and engine ground.
Connector & terminal
Non-turbo model
(B134) No. 10 (+) — Engine ground (
−):
Turbo model
(B134) No. 23 (+) — Engine ground (
−):Is the voltage 0 V ← → 14 V? Go to step 2.Check ECM. to EN(H4SO)-2,
Basic Diagnostics
Procedure.> to EN(H4DOTC)-2,
Basic Diagnostics
Procedure.>
2 CHECK HARNESS BETWEEN COMBINA-
TION METER AND ECM.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from ECM and
combination meter.
3) Measure the resistance between ECM har-
ness connector and combination meter har-
ness connector.
Connector & terminal
Non-turbo model
(B134) No. 10 — (i10) No. 11:
Turbo model
(B134) No. 23 — (i10) No. 11:Is the resistance less than 10
Ω?Check the tachom-
eter. 14, INSPECTION,
Tachometer.>Repair the wiring
harness.
Step Check Yes No
1 CHECK FUEL LEVEL SENSOR.
1) Remove the fuel level sensor. FU(H4SO)-57, REMOVAL, Fuel Level Sen-
sor.>
2) Measure the resistance between fuel level
sensor terminals when setting the float to
FULL and EMPTY position.
Te r m i n a l s
No. 3 — No. 5:Is the resistance 0.5 to 2.5 Ω
(FULL) and 50 to 52 Ω
(EMPTY)?Go to step 2.Replace the fuel
level sensor.
2 CHECK FUEL SUB LEVEL SENSOR.
1) Remove the fuel sub level sensor. FU(H4SO)-58, REMOVAL, Fuel Sub Level
Sensor.>
2) Measure the resistance between fuel sub
level sensor terminals when setting the float to
FULL and EMPTY position.
Te r m i n a l s
No. 1 — No. 2:Is the resistance 0.5 to 2.5 Ω
(FULL) and 42 to 44 Ω
(EMPTY)?Go to step 3.Replace the fuel
sub level sensor.
3 CHECK HARNESS BETWEEN FUEL SUB
LEVEL SENSOR AND COMBINATION
METER.
1) Disconnect the connector from combination
meter.
2) Measure the resistance between fuel sub
level sensor harness connector terminal and
combination meter harness connector termi-
nal.
Connector & terminal
(R59) No. 1 — (i11) No. 1:Is the resistance less than 10
Ω?Go to step 4.Repair the wiring
harness.

IDI-8
INSTRUMENTATION/DRIVER INFO
Combination Meter System
7. CHECK ENGINE COOLANT TEMPERATURE SENSOR
8. CHECK OUTSIDE TEMPERATURE INDICATOR
4 CHECK HARNESS BETWEEN FUEL LEVEL
SENSOR AND FUEL SUB LEVEL SENSOR.
Measure the resistance between fuel level sen-
sor harness connector terminal and fuel sub
level sensor harness connector terminal.
Connector & terminal
(R58) No. 3 — (R59) No. 2:Is the resistance less than 10
Ω?Go to step 5.Repair the wiring
harness.
5 CHECK FUEL LEVEL SENSOR GROUND
CIRCUIT.
Measure the resistance between fuel level sen-
sor harness connector terminal and chassis
ground.
Connector & terminal
(R58) No. 5 — Chassis ground:Is the resistance less than 10
Ω?Check the fuel
gauge. IDI-15, INSPEC-
TION, Fuel
Gauge.>Repair the wiring
harness.
Step Check Yes No
1 CHECK ENGINE COOLANT TEMPERATURE
SENSOR.
Check the engine coolant temperature sensor.
cedure.>Is the engine coolant tempera-
ture sensor OK?Go to step 2.Replace the
engine coolant
temperature sen-
sor.
2 CHECK HARNESS BETWEEN ENGINE
COOLANT TEMPERATURE SENSOR AND
COMBINATION METER.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from engine cool-
ant temperature sensor and combination
meter.
3) Measure the resistance between engine
coolant temperature sensor harness connector
and combination meter harness connector.
Connector & terminal
(E8) No. 3 — (i11) No. 10:Is the resistance less than 10
Ω?Go to step 3.Repair the wiring
harness.
3 CHECK WATER TEMPERATURE GAUGE
GROUND CIRCUIT.
Measure the resistance between combination
meter harness connector terminal and chassis
ground.
Connector & terminal
(i11) No. 9 — Chassis ground:Is the resistance less than 10
Ω?Check the water
temperature
gauge. IDI-16, INSPEC-
TION, Water Tem-
perature Gauge.>Repair the wiring
harness.
Step Check Yes No
1 CHECK POWER SUPPLY FOR AMBIENT
SENSOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from outside
temperature sensor.
3) Turn the ignition switch to ON.
4) Measure the voltage between outside tem-
perature sensor harness connector terminal
and chassis ground.
Connector & terminal
(F78) No. 2 (+) — Chassis ground (
−):Is the voltage more than 4 V? Go to step 3.Go to step 2. Step Check Yes No

IDI-9
INSTRUMENTATION/DRIVER INFO
Combination Meter System
2 CHECK HARNESS BETWEEN AMBIENT
SENSOR AND COMBINATION METER.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from combination
meter.
3) Measure the resistance between ambient
sensor harness connector terminal and combi-
nation meter harness connector terminal.
Connector & terminal
(F78) No. 1 — (i10) No. 25:
(F78) No. 2 — (i10) No. 24:Is the resistance less than 10
Ω?Replace the com-
bination meter
printed circuit.Repair the wiring
harness.
3 CHECK AMBIENT SENSOR.
1) Remove the ambient sensor.
2) Check the ambient sensor. INSPECTION, Ambient Sensor.>Is the ambient sensor OK? Go to step 4.Replace the ambi-
ent sensor.
4 CHECK OUTSIDE TEMPERATURE INDICA-
TOR.
1) Connect the combination meter harness
connector.
2) Connect a resistor (3 kΩ) between termi-
nals of ambient sensor harness connector.
3) Turn the ignition switch to ON and check
the outside temperature indicator display.Does the outside temperature
indicator indicate 25°C (77°F)?Repair the poor
contact of ambient
sensor harness
connector.Replace the com-
bination meter
printed circuit. Step Check Yes No