Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Subaru Legacy 1995-1999 Approved Subaru Legacy 1997 1997 Service Manual DIAGNOSTICS SECTION FOREWORD MSA5TCD97L30673
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4. Diagnosis and Checking Procedure Using Instruments
4. Diagnosis and Checking Procedure
Using Instruments
A: USING A CIRCUIT TESTER
1. VOLTAGE CHECK (range set to DC V)
Connect the positive probe to the terminal to be tested, and
the negative probe to body ground. (or the ground terminal of
the ECM)
B0M0020
2. CHECKING THE CONNECTION (range set to )
Measure the resistance and check for open or shorted wire in
the harness or the connector.
NOTE:
This check must be carried out with both connectors discon-
nected.
(This avoids by-passing the connection through other cir-
cuits.)
1) Check for open circuit. (range: x 1K)
B0M0021 Measure the resistance between the respective pins in both
connectors.
Specified resistance:
More than 1 M (No continuity) Open circuit
Less than 10 (Continuity) O.K.
2) Check for correct insulation value. (range: x 1K)
Measure the resistance between the pins in both connectors,
as well as between the suspected pin and the body. (body
short)
Specified resistance:
More than 1 M (No continuity) O.K.
Less than 10 (Continuity) Short circuit
3) Resistance measurement (range set to )
Measuring the internal resistance of sensors, solenoid valves
etc. to check the operating condition of components.
NOTE:
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