Diagnostic Circuit Check
The Diagnostic Circuit Check will identify a problem created by an Electronic Engine Control System (EECS) malfunction. It is the starting point for diagnosis. This check will direct you to the next logical step in diagnosing the complaint.
After completing Diagnostic Circuit Check and finding on-board diagnostics functioning properly with no trouble codes displayed, use appropriate SCAN DATA table for comparison. The typical values are an average of display values recorded from normally operating vehicles and are intended to represent what a normally functioning system would typically display.
NOTE:
Only parameters supplied by manufacturer are used in this article. If a Scan tester reads other parameters, values are not recommended by manufacturer for diagnostic use. A Scan tester displaying faulty data should not be used or a misdiagnosis will occur. Report problem to Scan tester manufacturer.
SCAN DATA
| Scan Position | (1) Data Value | ||||||
|---|---|---|---|---|---|---|---|
| A/C | No (Yes W/A/C Requested) | ||||||
| Air Divert | Normal | ||||||
| Air Switch | Converter | ||||||
| Battery | 13.5-14.5 Volts | ||||||
| BLM (Block Learn Memory) | 118-138 Counts | ||||||
| Coolant Temperature | 185-221°F (85-105°C) | ||||||
| IAC | 1-50 Counts | ||||||
| INT (Integrator) | Varied Amount of Counts | ||||||
| Knock Signal | No | ||||||
| MAP | (2) 1-2 Volts | ||||||
| Open/Closed Loop | Closed Loop (Open At Idle) | ||||||
| Oxygen Sensor | (3) .1-.9 Volts | ||||||
| RPM | 550-750 RPM | ||||||
| TPS | .42-.54 Volts | ||||||
| VSS | 0 MPH | ||||||
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