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Typical Ignition Module Assembly
The DIS module monitors the crank sensor signals and based on these signals
sends a reference signal to the ECM so that correct spark and fuel injector
control can be maintained during all driving conditions. During cranking, the
DIS
module monitors the "sync pulse" to begin the ignition firing
sequence, and below 400 rpm the module controls spark advance by triggering each
of the three coils at a pre-determined interval based on engine speed only.
Above 400
rpm, the ECM controls the spark timing through the module (EST), and compensates
for all driving conditions. The DIS module must receive a "sync pulse"
and then a crank signal in that order to enable the engine to start. The DIS
module is not repairable. When a module is replaced, the remaining DIS module
components must be transferred to the new module.
Thermal-Transfer Grease Application
REMOVAL
1. Disconnect negative battery cable.
2. Disconnect DIS electrical connectors.
3. Disconnect spark plug wires. (Note proper relationship of wires to coils).
4. Remove DIS assembly to block bolts (3).
5. Remove DIS assembly from engine.
INSTALLATION
1. Install DIS assembly to engine.
2. Install DIS assembly to block bolts (3). Torque to 20-30 N-m (15-22 lbs ft).
3. Connect spark plug wires to proper coils.
4. Connect DIS electrical connectors.
5. Connect negative battery cable.
Note: Thermal-Transfer Grease is not the same as the regular Di-Electric Grease. The Di-Electric Grease is used for making continuous electrical contact between metal connectors and eliminate/protects against corrosion. The Thermal-Transfer Grease is used for transferring heat from a device (ie. Ignition Control Module) to a metal heat-sink. The Ignition Control Module will be damaged from overheating if its heat is not transferred to a metal heat-sink. The surface area of the Ignition Control Module and the metal heat-sink are not perfectly smooth. Looking through a microscope, the surface would look like mountain or valley. To make the surface smooth as possible, the Thermal-Transfer Grease is used to fill any unevenness of the surface and the Thermal-Transfer Grease has some compound to help transfer heat efficiently.
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| Resistance between the two secondary towers:
1/4 coils = 5.70 KiloΩ |
Resistance between the two secondary towers:
6/3 coils = 5.81 KiloΩ |
Resistance between the two secondary towers:
5/2 coils = 5.71 KiloΩ |
| Resistance between the primary terminals. (It's located
at the bottom of the ignition coil and looks like a slotted wall outlet).
Resistance of primary terminals on 1/4 = 0.3Ω |
When you measure any resistance, make sure you connect
the two test leads together first and write down the value of the
resistance shown.
Resistance of primary terminals on 6/3 = 0.3Ω |
After getting the resistance values when you connect the
two leads together, deduct that resistance values when you measure
something else and you get the actual value of the circuit you are trying
to measure.
Resistance of primary terminals on 5/2 = 0.3Ω |
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A=Tan/Black - C3 Bypass, B=White - C9 EST, C=White (Tach Signal), D=not used, E=Purple/White - D13 Reference, F=Black/Red - Ground [This whole circuit connects to the ECM except the Tachometer Signal]. Resistance values between connector terminals A, B, C, D, E, F.
A = Yellow, B = Shield, C = Purple [This whole circuit connects to the CPS] Resistance between connector terminals A, B, C.
A=Black/White - Ground, B=Pink/Black - to Right side under hood Electrical center with 10 Amp fuse [This circuit provides power to the ICM]. Resistance between connector terminals A, B.
Resistance values between the spade terminals 1, 2, 3, 4, 5, 6 on the ICM.
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ICM_to_ECM_Electrical_Diagram
