2003 JEEP GRAND CHEROKEE lamp

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Page 317 of 2199

JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual Frequency (RF) Remote Keyless Entry (RKE)
receiver. The DDM and PDM control and integrate
many functions and features of the vehicle through
both hard wired outputs and messages over the PCI
data bus.

Page 318 of 2199

JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual lamp flash features), Unlock with the optional RKE
unlock, and Panic Mode functions. The optional RKE
features are programmable.
²Switch Illumination- Each door module pro-
vides control of the power

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JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual DESCRIPTION - POWER GROUNDS
The Powertrain Control Module (PCM) has 2 main
grounds. Both of these grounds are referred to as
power grounds. All of the high-current, noisy, electri-
cal devices are con

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JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual ²Malfunction indicator lamp (Check engine lamp).
Driven through J1850 circuits.
²Overdrive indicator lamp (if equipped). Driven
through J1850 circuits.
²Oxygen sensor heater relays (if equipped).

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JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual sponder through a tuned antenna ring integral to the
SKIM housing. If this antenna ring is not mounted
properly around the ignition lock cylinder housing,
communication problems between the SKIM and t

Page 333 of 2199

JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual BATTERY SYSTEM
DESCRIPTION
A single 12-volt battery system is standard factory-
installed equipment on this model. All of the compo-
nents of the battery system are located within the
engine compartme

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JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual BATTERY SYSTEM DIAGNOSIS
CONDITION POSSIBLE CAUSES CORRECTION
THE BATTERY STATE OF
CHARGE CANNOT BE
MAINTAINED.1. The battery has an
incorrect size or rating for
this vehicle.1. Refer to Battery Syste

Page 336 of 2199

JEEP GRAND CHEROKEE 2003 WJ / 2.G Workshop Manual CLEANING
The following information details the recommended
cleaning procedures for the battery and related com-
ponents. In addition to the maintenance schedules
found in this service manual and the o