brake sensor SUBARU FORESTER 1999 Service Repair Manual

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.
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[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)
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[T3F2]6-2DIAGNOSTICS
3. Cruise Control System

H: DIAGNOSTICS CHART WITH DIAGNOSTIC CODE
1. DIAGNOSTIC CODE LIST
Diagnostic
codeItem Contents of diagnosis Index No.
11 BRAKE SW/STOP SW Input signals from brake switch ªOFFº, stop light
switch ªONº
(Brake pedal is depressed.)
12 CLUTCH SW/INHIBITOR SW Input signals from clutch switch ªOFFº (MT), or inhibi-
tor switch ªP or Nº (AT)
[Clutch pedal is depressed (MT), or select lever is set
to P or N position (AT).]
13 LOW SPEED LIMIT Low-speed control limiter
14 CANCEL SW Input signal from cancel switch
(faulty SET/COAST switch or RESUME/ACCEL
switch)
21 VACUUM VALVE Faulty vacuum valve or valve drive system
22 VENT 2 VALVE Faulty vent 2 valve or valve drive system
23 VENT 1 VALVE Faulty vent 1 valve or valve drive system
24 SPEED SENSOR Faulty vehicle speed sensor (MT) or transmission
control module (AT)
25 CONTROL MODULE Faulty CPU RAM included in cruise control module
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[T3H1]6-2DIAGNOSTICS
3. Cruise Control System