See Figures 1 and 2
For the testing procedures, please refer to the applicable diagnostic flowcharts in this section.Preliminary Inspection
Before testing the ignition coil pack, perform this preliminary checkout:
- Visually inspect the engine compartment to ensure that all vacuum hoses and spark plug wires are properly and securely connected.
- Examine all wiring harnesses and connectors for damaged, burned or overheated insulation, damaged pins and loose or broken conditions. Check the sensor shield connector.
- Be certain the battery is fully charged.
- All accessories should be off during the diagnosis.
See Figure 3
To correctly test the ignition coil pack an DIST EI-High Data Rate HOOKUP, or equivalent, is necessary. Install the tester as follows:
- Turn the ignition key OFF . All accessories should be off during testing.
- Select the proper Overlay and Program Cartridge to match the ignition system to be tested.
- Install the overlay on the front panel of the tester.
- Insert the Program Cartridge into the cartridge slot (marked on the right hand side of the front panel). Make sure the module is fully inserted.
The DIST may be damaged or cause driveability problems if the Program Cartridge is not inserted or is improperly inserted.
- Select and install the EI High Data Rate harness adapter to the DIST tester.
- Verify that the tester switches, CKP SIMULATION and WIGGLE TEST, are in the OFF position.
Disconnect the vehicle wiring harnesses from the ICM.
- Depress the tab on the connector clip to remove the ignition harness.
- Inspect the connectors for dirt, corrosion, moisture, and bent or broken pins.
Hook the tester to the ICM.
- Plug the male connector of the tester into the engine harness connector.
- Plug the Female connector of the tester into the ICM.
Key On, Engine Off (KOEO). Press the RESET button on the tester. The tester will perform a Self-Test every time it is reset or powered up. During the Self-Test, all LEDs will light and a beep will be heard. If the tester fails to perform the Self-Test and VPWR LED is off, complete the following test sequence:
- Turn the ignition key OFF .
- Disconnect the tester from the vehicle.
- Connect a jumper wire from the VPWR jack to the vehicle battery positive (+) terminal.
- Connect a jumper wire from the PWR GND jack to the vehicle battery negative (-) terminal.
- If the tester performs the Self-Test at this time, there is a malfunction of the VPWR circuit or a related component. Have the vehicle diagnosed by a professional automotive mechanic.
- If the tester does not perform a Self-Test, the tester is defective.
REMOVAL & INSTALLATION
See Figure 4
On vehicle equipped with power steering it may be necessary to remove the intake (left hand) coil and bracket as an assembly.
- Install the coil pack and the retaining screws. Tighten the retaining screws to 40-62 inch lbs. (5-7 Nm)
Be sure to place some dielectric compound into each spark plug boot prior to installation of the spark plug wire.
- Attach the spark plug wires and electrical connector to the coil pack.
- Reconnect the negative battery cable.
When the battery has been disconnected and reconnected, some abnormal drive symptoms may occur while the ignition control module relearns its adaptive strategy. The vehicle may need to be driven 10 miles (16 km) or more to relearn the strategy.