WI-3
Basic Diagnostic Procedure
WIRING SYSTEM
1. Basic Diagnostic Procedure
A: BASIC PROCEDURES
1. GENERAL DESCRIPTION
The most important purpose of diagnostics is to
quickly determine which part is malfunctioning, to
save time and labor.
2. IDENTIFICATION OF TROUBLE SYMPTOM
Determine what the problem is based on the symp-
tom.
3. PROBABLE CAUSE OF TROUBLE
Look at the wiring diagram and check the system’s
circuit. Then check the switch, relay, fuse, ground,
etc.
4. LOCATION AND REPAIR OF TROUBLE
1) Using the diagnostics, narrow down the causes.
2) If necessary, use a voltmeter, ohmmeter, etc.
3) Before replacing certain component parts
(switch, relay, etc.), check the power supply,
ground, for open wiring harness, poor connectors,
etc. If no problem is encountered, check the com-
ponent parts.
5. SYSTEM OPERATION CHECK
After repairing, ensure that the system operates
properly.
B: BASIC INSPECTION
1. VOLTAGE MEASUREMENT
1) Using a voltmeter, connect the negative lead to a
good ground point or negative battery terminal and
the positive lead to the connector or component ter-
minal.
2) Touch connector (A) with the positive probe of
the volt meter. The voltmeter will indicate a voltage.
3) Touch connector (B) with the positive probe. The
voltmeter will indicate no voltage.
4) With the test set-up held as it is, turn the switch
to ON. The voltmeter will indicate a voltage and, at
the same time, the light will illuminate.
5) The circuit is in good order. If a problem such as
a light failing to illuminate occurs, use the proce-
dures outlined above to track down the malfunc-
tion.
2. CIRCUIT CONTINUITY CHECKS
1) Disconnect the battery terminal or connector so
there is no voltage between the check points.
Contact the two leads of an ohmmeter to each of
the check points.
If the circuit has diodes, reverse the two leads and
check again.
2) Use an ohmmeter to check for diode continuity.
When contacting the negative lead to the diode
positive side and the positive lead to the negative
side, there should be continuity.
When contacting the two leads in reverse, there
should be no continuity.
To power
Fuse
supply
Switch
Light
V
(A)
(B)
WI-02739
Continuity
No continuity
WI-02740
Содержание 2009 IMPREZA
Страница 18: ...PC 4 Precaution PRECAUTION...
Страница 21: ...NT 4 Note NOTE Lift Rigid rack A Attachment NT 00241 A A Attachment NT 00242 A...
Страница 23: ...NT 6 Note NOTE A Front B Rear 1 Front crossmember 2 Rear differential 1 2 A B NT 00210...
Страница 25: ...NT 8 Note NOTE TIE DOWN HOOK EYE BOLT A Front tie down hook B Rear tie down hook C Eye bolt NT 00213 A B C...
Страница 66: ...PI 22 Pre delivery Inspection PRE DELIVERY INSPECTION...
Страница 112: ...PM 48 A C Filter PERIODIC MAINTENANCE SERVICES...
Страница 219: ...IN H4SO 10 Resonator Chamber INTAKE INDUCTION...
Страница 324: ...ME H4SO 106 Engine Noise MECHANICAL...
Страница 388: ...SP H4SO 6 Accelerator Pedal SPEED CONTROL SYSTEMS...
Страница 395: ...IG H4SO 8 Spark Plug Cord IGNITION...
Страница 418: ...SC H4SO 24 Battery STARTING CHARGING SYSTEMS...
Страница 429: ...EN H4SO diag 12 Electrical Component Location ENGINE DIAGNOSTICS EN 05725 2 1 EN 06168 3 EN 03132 4...
Страница 725: ...EN H4SO diag 308 General Diagnostic Table ENGINE DIAGNOSTICS...
Страница 926: ...GD H4SO 202 Diagnostic Trouble Code DTC Detecting Criteria GENERAL DESCRIPTION...
Страница 1181: ...EX H4DOTC 16 Muffler EXHAUST...
Страница 1212: ...CO H4DOTC 32 Engine Cooling System Trouble in General COOLING...
Страница 1221: ...IG H4DOTC 8 Ignition Coil IGNITION...
Страница 1818: ...GD H4DOTC 230 Diagnostic Trouble Code DTC Detecting Criteria GENERAL DESCRIPTION...
Страница 1824: ...CS 7 AT Shift Lock Control System CONTROL SYSTEMS CS 00874 1 2 CS 00945 CS 00876 3 CS 00359 7 4 CS 00877 5 6...
Страница 2154: ...5MT 82 General Diagnostic Table MANUAL TRANSMISSION AND DIFFERENTIAL...
Страница 2227: ...RS 20 General Diagnostic Table REAR SUSPENSION...
Страница 2364: ...DS 36 General Diagnostic Table DRIVE SHAFT SYSTEM...
Страница 2577: ...BR 10 General Description BRAKE 7 BRAKE BOOSTER 1 Brake booster Tightening torque N m kgf m ft lb T 18 1 8 13 3 BR 00465 1 T...
Страница 2615: ...BR 48 General Diagnostic Table BRAKE...
Страница 2624: ...PB 10 General Diagnostic Table PARKING BRAKE...
Страница 2681: ...PS 58 General Diagnostic Table POWER ASSISTED SYSTEM POWER STEERING...
Страница 2730: ...AC 50 General Diagnostic Table HVAC SYSTEM HEATER VENTILATOR AND A C...
Страница 2940: ...OD diag 28 Diagnostic Procedure with Diagnostic Trouble Code DTC OCCUPANT DETECTION SYSTEM DIAGNOSTICS...
Страница 2961: ...SB 22 Rear Seat Belt SEAT BELT SYSTEM...
Страница 3035: ...COM 6 Horn Switch COMMUNICATION SYSTEM...
Страница 3070: ...GW 36 Wiper Deicer System GLASS WINDOWS MIRRORS...
Страница 3092: ...IDI 22 Clock INSTRUMENTATION DRIVER INFO...
Страница 3158: ...SL 54 Immobilizer Antenna SECURITY AND LOCKS...
Страница 3167: ...SR 10 Sunshade SUNROOF T TOP CONVERTIBLE TOP SUNROOF...
Страница 3240: ...EI 74 Ornament EXTERIOR INTERIOR TRIM...
Страница 3282: ...CC 8 Clutch Switch CRUISE CONTROL SYSTEM 6 Clutch Switch A NOTE For clutch switch refer to CL Ref to CL 27 Clutch Switch...
Страница 3286: ...CC 12 Neutral Position Switch CRUISE CONTROL SYSTEM...
Страница 3311: ...CC diag 26 Diagnostic Procedure with Cancel Code CRUISE CONTROL SYSTEM DIAGNOSTICS...
Страница 3342: ...LAN diag 9 Electrical Component Location LAN SYSTEM DIAGNOSTICS 1 LAN00303 LAN00425 2 LAN00299 7 8 LAN00297 LAN00008 11...
Страница 3421: ...LAN diag 88 General Diagnostic Table LAN SYSTEM DIAGNOSTICS...
Страница 3486: ...WI 67 Remote Engine Start System WIRING SYSTEM...
Страница 3560: ...WI 141 Combination Meter System WIRING SYSTEM 2 LUMINESCENT METER WI 16973 C M LM 01 C M LM 01 i10 CONNECT 22 21 20 19 2 1 40 39...