Preliminary Checkout, Equipment, and Notes
CHECKOUT1. Visually inspect the engine compartment to ensure all vacuum hoses and spark plug wires are properly and securely connected.
2. Examine all wiring harnesses and connectors for damaged insulation, burned, overheated, damaged pins, loose, or broken conditions. Check sensor shield connector.
3. Be certain the battery is fully charged.
4. All accessories should be OFF during diagnosis.
EQUIPMENT (REQUIRED)
Obtain the following test equipment or an equivalent:
Electronic Ignition (High Data Rate) Diagnostic Harness Hook-Up:
1. Electronic Ignition (EI) (High Data Rate) Diagnostic Harness (Rotunda 007-00059).
2. Spark Tester, Neon bulb type (Special Service Tool D89P-6666-A).
3. Volt-Ohmmeter (Rotunda 007-00001, 105-00050, 105-00051, 105-00052, 105-00053, or Scan Tool).
4. Remote starter switch.
5. Electronic Engine Control (EEC) Breakout Box (Rotunda T83L-50-EEC-IV).
6. Spark Tester, Gap type (Special Service Tool D81P-6666-A).
NOTE: A spark plug with a broken side electrode is not sufficient to check for spark and may lead to incorrect results.
7. Inductive Timing Light (Rotunda 059-00014) EI compatible.
8. Tachometer Adapter (Rotunda 007-00061) EI compatible.
EQUIPMENT (RECOMMENDED)
Ignition Intermittent Analyzer (Rotunda 007-00075 or equivalent).
NOTES
1. When making measurements on a wiring harness, both a visual inspection and a continuity test should be performed. Inspect the connector pins for damage (corrosion, bent or spread pins, etc.) when directed to remove a connector.
2. Spark timing adjustments are not possible.
3. When making voltage checks a GROUND reading means any value within a range of zero to 1.0 volt. Also VPWR or COIL PWR readings mean any value that falls within a range of B+ to 2.0 volts less than B+.
4. When making voltage checks and a reference to ground is made, use either the negative battery lead or cast iron on the engine.
5. B+ means the positive battery cable at the battery.
6. When using the spark plug firing indicator, place the grooved end as close as possible to the plug boot. Very weak or no flashing may be caused by a fouled plug.
7. Do not use an incandescent test lamp to check Crankshaft Position Sensor (CKPS)-, CKPS+, Profile Ignition Pickup (PIP), Ignition Diagnostic Monitor (IDM), or SPark OUTput (SPOUT) circuits. The lamp will prevent the circuit from operating.