Diagnostic Aids

PINPOINT TEST A is designed for a no-start condition. PINPOINT TESTS B through E are designed to identify hard faults. PINPOINT TESTS F and G are used to search for intermittent failures. 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 series, 70 series or 88). 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 voltage checks, ground readings are defined as a value of less than 1.0 volt. Battery voltage is defined as a value of 10-14 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: J31 (PIP). This indicates test terminal number and circuit identification. When the letter "I" follows the circuit identification, it implies PIP circuit at ICM for example: J31 (PIP I). When the letter "S" follows the circuit identification, it implies PIP circuit at ICM for example: J33 (PIP S).
• Test procedures are intended to identify faulty components or wiring while fault is present. If complaint is an intermittent condition, refer to H - EEC-IV TESTS W/O CODES article in the ENGINE PERFORMANCE Section.

Fig 1: EI Diagnostic Cable (3.0L SHO, 3.2L & 3.8L SC)

Fig 2: ICM Terminals (3.0L SHO, 3.2L & 3.8L SC)

Fig 3: EI System Pin Voltage Chart (3.0L SHO, 3.2L & 3.8L SC)

Fig 4: EI System Connector Terminal (3.0L SHO & 3.2L)

Fig 5: EI System Connector Terminal (3.8L SC)

Fig 6: EI Signal Diagram (3.0L SHO, 3.2L & 3.8L SC)

Fig 7: EI Circuits (3.0L SHO, 3.2L & 3.8L SC)