Subaru Crosstrek manuals

Subaru Crosstrek Service Manual: Basic procedures

WIRING SYSTEM > Basic Diagnostic Procedure

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 symptom.

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 component parts.

5. SYSTEM OPERATION CHECK

After repairing, ensure that the system operates properly.

Basic diagnostic procedure
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