Diagnostic Aids
WARNING: This page is about a different car, the 1994 Mercury Topaz and 1994 Ford Tempo. However, it is still accessible from the selected car via links, so may be relevant.
PINPOINT TESTS A, AA, AAA, B and C are intended to diagnose hard faults. Intermittent failures may be difficult to diagnose using these procedures. Following information should be noted during testing:
- All voltage readings given in test procedures are based on values obtained using a standard DVOM such as Rotunda (007 -00001) or Fluke (20 or 70 Series). DO NOT use RMS type meter.
- When instructed to inspect a wiring harness, perform both a visual inspection and a continuity test.
- When making voltage checks, ground connections should be made at negative battery terminal or cast iron surface of engine.
- When making measurements on a wiring harness or connector, perform a wiggle test while measuring.
- When making voltage checks, ground readings are defined as a value of less than 1.0 volt. Battery voltage is defined as a value of more than 10 volts.
- Circuits are identified in all capitals, for example: PIP. Manufacturer's breakout box overlay test terminals are identified by a "J" prefix, for example: J15 (PIP). This indicates test terminal number and circuit identification.
- Test procedures are intended to identify faulty components or wiring while fault is present. If complaint is an intermittent condition, see TESTS W/O CODES - EEC-IV (2.3L) in the ENGINE PERFORMANCE section.
NOTE:
Start all diagnostics with QUICK TEST. See TESTS W/CODES - EEC-IV (2.3L)
article in the ENGINE PERFORMANCE section. These tests are dependent on results and diagnostic trouble codes received during QUICK TEST.
DI PINPOINT TEST INDEX
| Application | Pinpoint Test/Step | |||
|---|---|---|---|---|
| No Start & No Codes Present | ||||
| Distributor Mounted ICM | A/1 | |||
| Remote Mounted ICM | AA/1 | |||
| No Start & Code 211 Or 212 Present (PIP At PCM Fault) | ||||
| Distributor Mounted ICM | A/1 | |||
| Remote Mounted ICM | AA/1 | |||
| Vehicle Runs Normal Until SPOUT In-Line Connector Disconnected | (1) AAA/1 | |||
| Code 212 (Engine Runs, IDM Missing | B/1 | |||
| Code 213 (Timing Incorrect, SPOUT Open, Poor Fuel Economy Or Poor Driveability) | C/1 | |||
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