Diagnostic Aids

PINPOINT TEST A is designed for a no-start situation. 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 Rotund (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 voltage checks, ground readings are defined as a value of less than one volt. Battery voltage is defined as a value of 10-14 volts.
• Test procedures are intended to identify faulty components or wiring while fault is present. If complaint is an intermittent condition, refer to TESTS W/O CODES - EEC-IV article in the ENGINE PERFORMANCE section.

Fig 1: DIS Diagnostic Cable & DIS Module Terminal Pins (3.0L SHO & 3.8L SC)

Fig 2: DIS System Pin Voltage Chart (3.0L SHO & 3.8L SC)

Fig 3: DIS System Wiring Diagram (3.0L SHO)

Fig 4: DIS System Wiring Diagram (3.8L SC)

Fig 5: DIS Signal Diagram (3.0L SHO & 3.8L SC)

Fig 6: DIS Components & Circuits (3.0L SHO & 3.8L SC)