Preliminary Checkout and Notes

CHECKOUT

NOTE: Start all diagnostics with EEC Quick Test. Tests in this section are dependent on EEC Quick Test results. Refer to EEC QUICK TEST under COMPUTERIZED ENGINE CONTROLS.

1. Visually inspect and ensure that vacuum hoses and spark plug wires are in good condition and properly connected.
2. Examine all wiring harnesses and connectors for insulation damage, overheating, damaged pins and loose connections. Check VRS shield connector. Ensure that EDIS Module mounting screw is tight.
3. Make sure battery is fully charged.
4. Turn all accessories "OFF" during diagnosis.

EDIS PINPOINT TESTS

Test A: EDIS No Start
Test B: KOEO Code 16, Continuous Memory Code 18 and/or "Check Engine" light "ON:" IDM failure.
Test C: Continuous Memory Code 45 and/or "Check Engine" light "ON:" Coil failure.
Test D: Engine Running Code 18: SAW failure.

NOTES

1. When making measurements on a wiring harness, both a visual inspection and a continuity test should be performed. Inspect 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 0 to 1 volt. Battery voltage ("VBAT") means any value within a range of actual battery voltage and 2 volts less.
4. When making voltage checks and a reference to "GROUND" is made, use either the negative battery cable or cast iron on the engine. "BAT +" means the positive battery cable at the battery.
5. When using the spark plug firing indicator, place the grooved end as close as possible to the plug boot. Weak or no flashing may be caused by a fouled plug.
6. Use a 12V LED test lamp to test circuits only as directed. If used improperly, it will load circuits and may cause erroneous measurements or improper EDIS/EEC operation (i.e., engine stall).

USING THE LED TEST LAMP

LED Test Lamp:

The LED test lamp is used to supplement the VOM. It will save time when checking power, PIP and coil circuits. The test lamp is "ON" if LED 1 shows green or red.

USING A VOLTMETER

If using a voltmeter to check the PIP signal, the engine must be turned very slowly (bumped) with the starter. This is a digital signal and should switch from ground (0V to 0.5V) to BAT+ (8V to 14V) or BAT+ to ground. Correct test lead polarity must be used.