powertrain control module JEEP GRAND CHEROKEE 2003 WJ / 2.G Owner's Manual

JEEP GRAND CHEROKEE 2003 WJ / 2.G Owner's Manual GRAND CHEROKEE 2003 WJ / 2.G JEEP JEEP https://www.carmanualsonline.info/img/16/7175/w960_7175-0.png JEEP GRAND CHEROKEE 2003 WJ / 2.G Owner's Manual

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JEEP GRAND CHEROKEE 2003 WJ / 2.G Owners Manual The ignition system is controlled by the powertrain
control module (PCM) on all engines.
The ignition system consists of:
²Spark Plugs
²Ignition Coil(s)
²Powertrain Control Module (PCM)
²Crankshaf

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JEEP GRAND CHEROKEE 2003 WJ / 2.G Owners Manual SPARK PLUGS
ENGINE PLUG TYPE ELECTRODE GAP
4.0L 6-CYL. RC12ECC 0.89 mm (.035 in.)
4.7L V-8 (Exc. HO) RC12MCC4 1.01 mm (.040 in.)
4.7L V-8 High
Output (HO)RC7PYCB4 1.01 mm (.040 in.)
TORQUE - IGNITION

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JEEP GRAND CHEROKEE 2003 WJ / 2.G Owners Manual The ASD relay will be shut±down, meaning the
12±volt power supply to the ASD relay will be de-ac-
tivated by the PCM if:
²the ignition key is left in the ON position. This
is if the engine has not

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JEEP GRAND CHEROKEE 2003 WJ / 2.G Owners Manual (14) If a plus (+) or a minus (-) is displayed next to
degree number, and/or the degree displayed is not
zero, loosen but do not remove hold-down clamp bolt.
Rotate oil pump drive until IN RANGE appea

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JEEP GRAND CHEROKEE 2003 WJ / 2.G Owners Manual OPERATION
Although cylinder firing order is the same as 4.0L
Jeep engines of previous years, spark plug firing is
not. The 3 coils dual-fire the spark plugs on cylinders
1-6, 2-5 and/or 3-4. When one

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JEEP GRAND CHEROKEE 2003 WJ / 2.G Owners Manual OPERATION
Battery voltage is supplied to the 8 ignition coils
from the ASD relay. The Powertrain Control Module
(PCM) opens and closes each ignition coil ground cir-
cuit at a determined time for igni

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JEEP GRAND CHEROKEE 2003 WJ / 2.G Owners Manual IGNITION COIL CAPACITOR
DESCRIPTION
Two coil capacitors are used. One of them is
located near the center of, and on the left side of the
intake manifold (Fig. 20). The other capacitor is
located near

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JEEP GRAND CHEROKEE 2003 WJ / 2.G Owners Manual The voltage signal produced by the knock sensor
increases with the amplitude of vibration. The PCM
receives the knock sensor voltage signal as an input.
If the signal rises above a predetermined level

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JEEP GRAND CHEROKEE 2003 WJ / 2.G Owners Manual INSTALLATION
4.7L High-Output Engine Only
NOTE: The left sensor is identified by an identifica-
tion tag (LEFT). It is also identified by a larger bolt
head. The Powertrain Control Module (PCM) must
h

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JEEP GRAND CHEROKEE 2003 WJ / 2.G Owners Manual OPERATION
The ElectroMechanical Instrument Cluster (EMIC)
is designed to allow the vehicle operator to monitor
the conditions of many of the vehicle components and
operating systems. The gauges and in