1999 SUBARU FORESTER sensor

S: TROUBLE CODE 53
DIAGNOSIS:
Side airbag sensor (RH) is faulty.
CAUTION:
Before performing diagnostics on airbag
system, turn ignition switch ªOFFº, disconnect
battery ground terminal, and then wait at least
20 seconds.
5S1 : CHECK IF TROUBLE CODE 53 IS
INDICATED.
Confirm flashing trouble code according to ªBASIC
DIAGNOSTICS PROCEDUREº. [T4A0].>
:Is airbag warning light trouble code
53 indicated?
: Replace side airbag sensor (RH). to 5-5 [W7A0].>
: Perform clear memory. [T4C0].>
T: TROUBLE CODE 54
DIAGNOSIS:
Side airbag sensor (LH) is faulty.
CAUTION:
Before performing diagnostics on airbag
system, turn ignition switch ªOFFº, disconnect
battery ground terminal, and then wait at least
20 seconds.
5T1 : CHECK IF TROUBLE CODE 54 IS
INDICATED.
Confirm flashing trouble code according to ªBASIC
DIAGNOSTICS PROCEDUREº. [T4A0].>
:Is airbag warning light trouble code
54 indicated?
: Replace side airbag sensor (LH). to 5-5 [W7A0].>
: Perform clear memory. [T4C0].>
54
5-5[T5S0]DIAGNOSTICS
5. Diagnostics Chart with Trouble Code

U: TROUBLE CODE 55
DIAGNOSIS:
Side airbag module is inflated.
CAUTION:
Before performing diagnostics on airbag
system, turn ignition switch ªOFFº, disconnect
battery ground cable and then wait at least 20
seconds.
5U1 : CHECK IF TROUBLE CODE 55 IS
INDICATED.
Confirm flashing trouble code according to ªBASIC
DIAGNOSTICS PROCEDUREº. [T4A0].>
:Is airbag warning light trouble code
55 indicated?
: Replace front seat with side airbag mod-
ule (Operating side) [W100].>, side airbag sensor (Operating
side) and airbag
control module.
: Perform clear memory. [T4C0].>
V: AIRBAG WARNING LIGHT
REMAINS ON.
DIAGNOSIS:
IAirbag warning light is faulty.
IAirbag control module to airbag warning light
harness circuit is shorted or open.
IGrounding circuit is faulty.
IAirbag control module is faulty.
I(AB1) and (B31) are not connected properly.
I(AB6) is not connected properly to airbag control
module.
CAUTION:
Before performing diagnostics on airbag
system, turn ignition switch ªOFFº, disconnect
battery ground cable and then wait at least 20
seconds.
5V1 : CHECK POOR CONTACT IN CON-
NECTORS (AB1) AND (B31).
1) Remove front pillar lower trim (Driver side).
2) Check poor contact in connectors (AB1) and
(B31).
B5M0122B
:Is there poor contact in double lock
of connectors (AB1) and (B31)?
: Repair poor contact in double lock of
connectors (AB1) and (B31).
: Go to step5V2.
55
[T5V1]5-5DIAGNOSTICS
5. Diagnostics Chart with Trouble Code

X: WARNING LIGHT INDICATES
TROUBLE CODE, THEN NORMAL
CODE. (FLASHING TROUBLE
CODE.)
DIAGNOSIS:
Airbag system component parts are faulty.
CAUTION:
Before performing diagnostics on airbag
system, turn ignition switch ªOFFº, disconnect
battery ground cable, and then wait at least 20
seconds.5X1 : AIRBAG COMPONENT PARTS
APPEARANCE INSPECTION
1) Conduct on-board diagnostic and call up
trouble codes stored in memory. [T4B0].>
2) Select trouble code required to check airbag
component parts from those listed in table and
reproduce symptom.
Trouble codes Check parts Index. No.
11IRoll connector
IAirbag module (Driver)
IAirbag main harness
IAirbag control module



12IAirbag module (Passenger)
IAirbag main harness
IAirbag control module


15IAirbag module (Driver)
IRoll connector
IAirbag main harness
IAirbag control module



16IAirbag main harness
IAirbag module (Passenger)
IAirbag control module


21 Airbag control module
22 Airbag control module
25IFuse No. 6
IAirbag main harness
IAirbag control module
IBody harness



26 Side airbag module (LH) in front seat
31IAirbag main harness
IFront sub sensor and front sub sensor harness (RH)

32IAirbag main harness
IFront sub sensor and front sub sensor harness (LH)

41 Side airbag module (RH) in front seat
42 Side airbag module (LH) in front seat
45IAirbag control module
ISide airbag module (RH) in front seat

46IAirbag control module
ISide airbag module (LH) in front seat

51ISide airbag sensor (RH)
IAirbag control module

52ISide airbag sensor (LH)
IAirbag control module

53 Side airbag sensor (RH)
54 Side airbag sensor (LH)
55 Side airbag module in front seat
60
5-5[T5X0]DIAGNOSTICS
5. Diagnostics Chart with Trouble Code

1. Combination Meter
A: DIAGNOSTICS PROCEDURE
If speedometer does not operate, or operates
abnormally, check combination meter circuit.
CAUTION:
Make sure that trouble code of vehicle speed
sensor system appears in electrical system on-
board diagnosis.
1A1 : CHECK POWER SUPPLY FOR COM-
BINATION METER.
1) Remove combination meter. [W8A0].>
2) Turn ignition switch to ON.
3) Measure voltage between combination meter
connector and chassis ground.
Connector & terminal
(i10) No. 1 (+) Ð Chassis ground (þ):
S6M0430A
:Is the voltage more than 10 V?
: Go to step1A2.
: Repair harness and connector.
NOTE:
In this case, repair the following:
IOpen circuit in harness between combination
meter and battery.
IPoor contact in coupling connectors (i10) and
combination meter connector. WORD [W3C0].>1A2 : CHECK POWER SUPPLY FOR COM-
BINATION METER.
Measure voltage between combination meter con-
nector and chassis ground.
Connector & terminal
(i10) No. 2 (+) Ð Chassis ground (þ):
S6M0431A
:Is the voltage more than 10 V?
: Go to step1A3.
: Repair harness and connector.
NOTE:
In this case, repair the following:
IOpen circuit in harness between combination
meter and battery.
IPoor contact in coupling connectors (i10) and
combination meter connector. WORD [W3C0].>
1A3 : CHECK GROUND CIRCUIT OF COM-
BINATION METER.
1) Turn ignition switch to OFF.
2) Measure resistance of harness between com-
bination meter connector and chassis ground.
Connector & terminal
(i10) No. 3 (+) Ð Chassis ground (þ):
S6M0432A
:Is the resistance less than 10W?
: Go to step1A4.
: Repair harness and connector.
2
6-2[T1A0]DIAGNOSTICS
1. Combination Meter

1A4 : CHECK TRANSMISSION TYPE.
:Is the transmission type MT?
: Go to step1A5.
: Go to step1A9.
1A5 : CHECK HARNESS CONNECTOR
BETWEEN COMBINATION METER
AND VEHICLE SPEED SENSOR.
1) Disconnect connector from vehicle speed sen-
sor.
2) Measure resistance of harness connector
between vehicle speed sensor and combination
meter.
Connector & terminal
(B17) No. 1 Ð (i10) No. 7:
S6M0433A
:Is the resistance less than 10W?
: Go to step1A6.
: Repair wiring harness.1A6 : CHECK HARNESS CONNECTOR
BETWEEN BATTERY AND VEHICLE
SPEED SENSOR.
1) Turn ignition switch to ON.
2) Measure voltage between vehicle speed sensor
connector (B17) and chassis ground.
Connector & terminal
(B17) No. 3 (+) Ð Chassis ground (þ):
B6M0945A
:Is the voltage more than 10 V?
: Go to step1A7.
: Repair harness connector between bat-
tery and vehicle speed sensor.
1A7 : CHECK HARNESS CONNECTOR
BETWEEN VEHICLE SPEED SENSOR
AND ENGINE GROUND.
1) Turn ignition switch to OFF.
2) Measure resistance between vehicle speed
sensor connector (B17) and engine ground.
Connector & terminal
(B17) No. 2 (+) Ð Engine ground (þ):
B6M0946A
:Is the resistance less than 10W?
: Go to step1A8.
: Repair harness connector between
vehicle speed sensor and engine
ground.
3
[T1A7]6-2DIAGNOSTICS
1. Combination Meter

1A8 : CHECK VEHICLE SPEED SENSOR.
1) Connect connector to vehicle speed sensor.
2) Set the vehicle on a free roller, or lift-up the
vehicle and support with safety stands.
WARNING:
Be careful not to get caught in the rotating
wheels.
3) Set oscilloscope to vehicle speed sensor con-
nector terminals.
Positive probe; (B17) No. 1
Earth lead; (B17) No. 2
H6M0789A
4) Drive the vehicle at speed greater than 20 km/h
(12 MPH).
5) Measure signal voltage indicated on oscillo-
scope.
H6M0790A
:Is the voltage more than 5 V?
: Repair or replace speedometer.
: Replace vehicle speed sensor. 6-2 [W1100].>1A9 : CHECK HARNESS CONNECTOR
BETWEEN COMBINATION METER
AND AUTOMATIC TRANSMISSION
CONTROL MODULE.
1) Disconnect connector from automatic transmis-
sion control module.
2) Measure resistance between combination
meter connector (i10) and automatic transmission
control module connector (B56).
CAUTION:
To measure the voltage and/or resistance, use
a tapered pin with a diameter of less than 0.64
mm (0.025 in). Do not insert the pin more than
5 mm (0.20 in).
Connector & terminal
(i10) No. 7 Ð (B56) No. 17:
S6M0434A
:Is the resistance less than 10W?
: Go to step1A10.
: Repair harness connector between
combination meter and automatic trans-
mission control module.
4
6-2[T1A8]DIAGNOSTICS
1. Combination Meter

Content Terminal No. Measuring conditions and I/O signals (ignition switch ON and engine idling)
Vehicle speed sensor (MT)
Automatic transmission control
module (AT)18 Lift-up the vehicle until all four wheels are raised off ground, and then rotate
any wheel manually. Approx. 5 and 0 volt pulse signals are alternately input to
cruise control module.
Stop light switch 19 Turn ignition switch to OFF. Then check that;
IBattery voltage is present when brake pedal is depressed.
Iª0º volt is present when brake pedal is released.
Ground 20 Ð
NOTE:
Voltage at terminals 1, 2, 11 and 12 cannot be checked unless vehicle is driving by cruise control operation.
21
[T3E0]6-2DIAGNOSTICS
3. Cruise Control System

2. ON-BOARD DIAGNOSIS WITH SELECT
MONITOR
IGeneral
The on-board diagnosis function of the cruise con-
trol system uses an external select monitor.
The on-board diagnosis function operates in two
categories, which are used depending on the type
of problems;
NOTE:
Select monitor part No.:

1) Cruise cancel conditions diagnosis
(1) This category of diagnosis requires actual
vehicle driving in order to determine the cause,
(as when cruise speed is cancelled during driv-
ing although cruise cancel condition is not
entered).
(2) Cruise control module memory stores the
cancel condition (Code No.) which occurred
during driving. When there are plural cancel
conditions (Code No.), they are shown on the
select monitor.
CAUTION:
IThe cruise control memory stores not only
the cruise ªcancelº which occurred (although
ªcancelº operation is not entered by the
driver), but also the ªcancelº condition input by
the driver.
IThe content of memory is cleared when igni-
tion switch or cruise main switch is turned OFF.
2) Real-time diagnosis
The real-time diagnosis function is used to deter-
mine whether or not the input signal system is in
good order, according to signal emitted from
switches, sensors, etc.
(1) Vehicle cannot be driven at cruise speed
because problems occurs in the cruise control
system or its associated circuits.
(2) Monitor the signal conditions from switches
and sensors.
ICruise Cancel Conditions Diagnosis
1) Connect select monitor.
2) Start the engine and turn cruise control main
switch to ON.
3) Set select monitor in ªAll System Diagnosisº
mode.
NOTE:
The diagnostic code is also shown in the ªEach
System Checkº mode. This mode is called up on
the ªCruise Control Diagnosisº screen by selecting
the item ªCancel Code(s) Displayº.
4) Drive vehicle at least 40 km/h (25 MPH) with
cruise speed set.5) If cruise speed is canceled itself (without doing
any cancel operations), a diagnostic code will
appear on select monitor display.
CAUTION:
IA diagnostic code will also appear when
cruise cancel is effected by driver. Do not con-
fuse.
IHave a co-worker ride in vehicle to assist in
diagnosis during driving.
NOTE:
Diagnostic code will be cleared by turning ignition
switch or cruise control main switch to OFF.
IReal-Time Diagnosis
1) Connect select monitor.
2) Turn ignition switch and cruise control main
switch to ON.
3) Select the ªCurrent Data Display & Saveº mode
on the select monitor ªCruise Control Diagnosisº
screen.
4) Ensure that normal indication is displayed when
controls are operated as indicated below:
IDepress/release the brake pedal. (Stop light
switch and brake switch turn ON.)
ITurn ON the ªSET/COASTº switch.
ITurn ON the ªRESUME/ACCELº switch.
IDepress/release the clutch pedal. (MT)
ISet the select lever to P or N. (AT)
23
[T3F2]6-2DIAGNOSTICS
3. Cruise Control System