(1) Check the fused B(+) fuse (Fuse 7 - 10 ampere)
in the Junction Block (JB). If OK, go to Step 2. If not
OK, repair the shorted circuit or component as
required and replace the faulty fuse.
(2) Check for battery voltage at the fused B(+) fuse
(Fuse 7 - 10 ampere) in the JB. If OK, go to Step 3. If
not OK, repair the open B(+) circuit between the JB
fuse and the Power Distribution Center (PDC) as
required.
(3) Check the fused ignition switch output (st-run)
fuse (Fuse 22 - 10 ampere) in the JB. If OK, go to
Step 4. If not OK, repair the shorted circuit or com-
ponent as required and replace the faulty fuse.
(4) Turn the ignition switch to the On position.
Check for battery voltage at the fused ignition switch
output (st-run) fuse (Fuse 22 - 10 ampere) in the JB.
If OK, go to Step 5. If not OK, repair the open fused
ignition switch output (st-run) circuit between the JB
fuse and the ignition switch as required.
(5) Disconnect and isolate the battery negative
cable. Disconnect the instrument panel wire harness
connector for the Sentry Key Immobilizer Module
(SKIM) from the SKIM connector receptacle. Check
for continuity between the ground circuit cavity of
the instrument panel wire harness connector for the
SKIM and a good ground. There should be continuity.
If OK, go to Step 6. If not OK, repair the open
ground circuit to ground (G200) as required.
(6) Reconnect the battery negative cable. Check for
battery voltage at the fused B(+) circuit cavity of the
instrument panel wire harness connector for the
SKIM. If OK, go to Step 7. If not OK, repair the open
fused B(+) circuit between the SKIM and the JB fuse
as required.
(7) Turn the ignition switch to the On position.
Check for battery voltage at the fused ignition switch
output (st-run) circuit cavity of the instrument panel
wire harness connector for the SKIM. If OK, refer to
the appropriate diagnostic information and use a
DRBIII
t scan tool to complete the diagnosis of the
SKIS. If not OK, repair the open fused ignition
switch output (st-run) circuit between the SKIM and
the JB fuse as required.
SKIS INDICATOR FLASHES OR LIGHTS SOLID FOLLOWING
BULB TEST
A SKIS indicator that flashes following a successful
bulb test indicates that an invalid key has been
detected, or that a key-related fault has been set. A
SKIS indicator that lights solid following a successful
bulb test indicates that the SKIM has detected a sys-
tem malfunction or that the SKIS is inoperative. In
either case, fault information will be stored in the
SKIM memory. For retrieval of this fault information
and further diagnosis of the SKIS, the PCI data bus,
the SKIM message outputs to the instrument cluster
that control the SKIS indicator, the SKIM message
outputs to the Body Control Module (BCM) that con-
trol chime service, or the message inputs and outputs
between the SKIM and the Powertrain Control Mod-
ule (PCM) that control engine operation, a DRBIII
t
scan tool and the appropriate diagnostic information
are required. Following are preliminary troubleshoot-
ing guidelines to be followed during diagnosis using a
DRBIII
t scan tool:
(1) Using the DRBIII
t scan tool, read and record
the faults as they exist in the SKIM when you first
begin your diagnosis of the vehicle. It is important to
document these faults because the SKIM does not
differentiate between historical faults (those that
have occurred in the past) and active faults (those
that are currently present). If this problem turns out
to be an intermittent condition, this information may
become invaluable to your diagnosis.
(2) Using the DRBIII
t scan tool, erase all of the
faults from the SKIM.
(3) Cycle the ignition switch to the Off position,
then back to the On position.
(4) Using the DRBIII
t scan tool, read any faults
that are now present in the SKIM. These are the
active faults.
(5) Using this active fault information, refer to the
proper procedure in the appropriate diagnostic infor-
mation for the additional specific diagnostic steps.
STANDARD PROCEDURE - SKIS
INITIALIZATION
The Sentry Key Immobilizer System (SKIS) must
be initialized following a Sentry Key Immobilizer
Module
(SKIM)
replacement.
SKIS
initialization
requires the use of a DRBIII
t scan tool. Initialization
will also require that you have access to the unique
four-digit PIN code that was assigned to the original
SKIM. The PIN code must be used to enter the
Secured Access Mode in the SKIM. This PIN number
may be obtained from the vehicle owner, from the
original vehicle invoice, or from the DaimlerChrysler
Customer Center. (Refer to 8 - ELECTRICAL/ELEC-
TRONIC CONTROL MODULES - STANDARD PRO-
CEDURE - PCM/SKIM PROGRAMMING).
NOTE: If a Powertrain Control Module (PCM) is
replaced on a vehicle equipped with the Sentry Key
Immobilizer System (SKIS), the unique Secret Key
data must be transferred from the Sentry Key
Immobilizer Module (SKIM) to the new PCM using
the PCM replacement procedure. This procedure
also requires the use of a DRBIII
T
scan tool and the
unique four-digit PIN code to enter the Secured
Access Mode in the SKIM. Refer to the appropriate
diagnostic information for the proper PCM replace-
ment procedures.
WG
VEHICLE THEFT SECURITY
8Qs - 3
VEHICLE THEFT SECURITY (Continued)
2001 JEEP GRAND CHEROKEE