1991 1999 ford explorer chilton User Manual

							B+ to Coil 3
· 
B+ to Coil 4
· 
The resistance between all of these terminals should have been between 0.3-1.0 ohms. If the resistance was
more or less than this value, the coil should be replaced with a new one.
SECONDARY RESISTANCE
Engine ignition coil harness connections-3.0L and 4.0L engines Click to enlarge
Engine ignition coil harness connections-2.3L, 2.5L and 5.0L engines Click to enlarge
Measure, using the ohmmeter, and note the resistance between each corresponding coil terminal and
the two spark plug wire towers on the ignition coil. The coil terminals and plug wires towers are
grouped as follows:
1. 
Except 2.3L, 2.5L and 5.0L engines Terminal 3 (coil 1)-spark plugs 1 and 5
· 
Terminal 2 (coil 3)-spark plugs 2 and 6
· 
Terminal 1 (coil 2)-spark plugs 3 and 4
· 
2.3L, 2.5L engines-right-hand coil pack Terminal 1 (coil 2)-spark plugs 2 and 3
· 
Terminal 3 (coil 1)-spark plugs 1 and 4
·  HOW TO USE THIS BOOK
200 TESTING 
						

							
2.3L, 2.5L engines-left-hand coil pack
Terminal 1 (coil 4)-spark plugs 2 and 3
· 
Terminal 3 (coil 3)-spark plugs 1 and 4
· 
5.0L engines-right-hand coil pack Terminal 1 (coil 2)-spark plugs 3 and 5
· 
Terminal 3 (coil 1)-spark plugs 1 and 6
· 
5.0L engines-left-hand coil pack Terminal 1 (coil 4)-spark plugs 2 and 8
· 
Terminal 3 (coil 3)-spark plugs 4 and 7
· 
If the resistance for all of the readings was between 6,500-11,500 ohms, the ignition coils are OK. If any of
the readings was less than 6,500 ohms or more than 11,500 ohms, replace the corresponding coil pack.
On 2.3L, 2.5L and 5.0L engines, if one coil pack is found to be defective, the other pack does not need to
be replaced.
REMOVAL & INSTALLATION
All engines, except the 2.3L, 2.5L and 5.0L engines, utilizes one coil pack containing three separate
coils. The 2.3L, 2.5L and 5.0L engines use two coil packs containing two separate coils each. HOW TO USE THIS BOOK
TESTING 201 
						

							1991 ignition coil mounting for the 2.3L engine
Click to enlarge
HOW TO USE THIS BOOK
202 REMOVAL & INSTALLATION 
						

							1992-99 ignition coil mounting for the 2.3L, 2.5L engine
Click to enlarge
Ignition coil mounting for the 3.0L engine Click to enlarge
HOW TO USE THIS BOOK
REMOVAL & INSTALLATION 203 
						

							Ignition coil mounting for the 4.0L engine
Click to enlarge
HOW TO USE THIS BOOK
204 REMOVAL & INSTALLATION 
						

							Ignition coil mounting for the 5.0L engine
Click to enlarge
Disconnect the negative battery cable.
1. 
To remove the coil pack, unplug the electrical harness connector from it
Unplug the electrical harness connector from the ignition coil pack.
2.  HOW TO USE THIS BOOK
REMOVAL & INSTALLATION 205 
						

							Label the spark plug wires according to their position on the coil pack
Remove the plug wires from the coil by squeezing the lock tabs (arrows) and pulling straight up Label and remove the spark plug wires from the ignition coil terminal towers by squeezing the
locking tabs to release the coil boot retainers.
3. 
Remove the coil retaining screws ...HOW TO USE THIS BOOK
206 REMOVAL & INSTALLATION 
						

							... then remove the coil pack from its mounting bracket
Remove the coil pack mounting screws and remove the coil pack.
4. 
To install: Install the coil pack and the retaining screws. Tighten the retaining screws to 40-62 inch lbs. (4.5-7
Nm).
5. 
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 harness connector to the coil pack.
6. 
Connect the negative battery cable.
7. 
Ignition Control Module (ICM)
REMOVAL & INSTALLATION
Only the EEC-IV ignition systems use an external ICM. EEC-V systems have incorperated the ICM
into the Power Control Module (PCM).
Disconnect the negative battery cable.
1. 
Detach the wiring harness connector(s) from the ICM.
2. 
Remove the mounting bolts, then remove the ICM.
3. 
To install: Position the ICM onto the inner fender apron and install the mounting bolts. Tighten the bolts to
22-31 inch lbs (2.5-3.5 Nm).
4. 
Attach the wiring harness connector(s) to the ICM.
5. 
Connect the negative battery cable.
6.  HOW TO USE THIS BOOK
Ignition Control Module (ICM) 207 
						

							Ignition control module and mounting location on the 2.3L, 2.5L engine
Click to enlarge
Ignition control module used on all EEC-IV systems except the 2.3L engine HOW TO USE THIS BOOK
208 REMOVAL & INSTALLATION 
						

							Ignition control module mounting on all EEC-IV systems except the 2.3L engine
Camshaft Position (CMP) and Crankshaft Position (CKP)
Sensors
For procedures on these sensors, please refer to Section 4 in this manual.
Chilton® Automotive Information Systems. © 2004 Thomson Delmar Learning. HOW TO USE THIS BOOK
Camshaft Position (CMP) and Crankshaft Position (CKP) Sensors 209