SKIS INDICATOR FAILS TO LIGHT DURING BULB TEST
If the Sentry Key Immobilizer System (SKIS) indi-
cator in the instrument cluster fails to illuminate for
about three seconds after the ignition switch is
turned to the On position (bulb test), perform the
instrument cluster actuator test. (Refer to 8 - ELEC-
TRICAL/INSTRUMENT CLUSTER - DIAGNOSIS
AND TESTING - ACTUATOR TEST). If the SKIS
indicator still fails to light during the bulb test, a
wiring problem resulting in the loss of battery cur-
rent or ground to the Sentry Key Immobilizer Module
(SKIM) should be suspected, and the following proce-
dure should be used for diagnosis. Refer to the appro-
priate wiring information. The wiring information
includes wiring diagrams, proper wire and connector
repair procedures, details of wire harness routing
and retention, connector pin-out information and
location views for the various wire harness connec-
tors, splices and grounds.
NOTE: The following tests may not prove conclu-
sive in the diagnosis of this system. The most reli-
able, efficient, and accurate means to diagnose the
Sentry Key Immobilizer System requires the use of
a DRBIII
T
scan tool. Refer to the appropriate diag-
nostic information.
(1) Check the B(+) fuse (Fuse 1 - 20 ampere) in the
fuse block. 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 B(+) fuse
(Fuse 1 - 20 ampere) in the fuse block. If OK, go to
Step 3. If not OK, repair the open B(+) circuit
between the fuse block and the battery as required.
(3) Check the ignition switch output (run-start)
fuse (Fuse 12 - 10 ampere) in the fuse block. If OK,
go to Step 4. If not OK, repair the shorted circuit or
component 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 (run-start) fuse (Fuse 12 - 10 ampere) in the
fuse block. If OK, go to Step 5. If not OK, repair the
open fused ignition switch output (run-start) circuit
between the fuse block 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 each of the two ground circuit
cavities of the instrument panel wire harness connec-
tor 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(s) to ground (G105 and G302) 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 fuse
block as required.
(7) Turn the ignition switch to the On position.
Check for battery voltage at the fused ignition switch
output (run-start) circuit cavity of the instrument
panel wire harness connector for the SKIM. If OK,
use a DRBIII
t scan tool to complete the diagnosis of
the SKIS. Refer to the appropriate diagnostic infor-
mation. If not OK, repair the open fused ignition
switch output (run-start) circuit between the SKIM
and the fuse block 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 and/or chime service,
or the message inputs and outputs between the
SKIM and the Powertrain Control Module (PCM)
that control engine operation, a DRBIII
t scan tool is
required. Refer to the appropriate diagnostic infor-
mation. Following are preliminary troubleshooting
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.
TJ
VEHICLE THEFT SECURITY
8Q - 3
VEHICLE THEFT SECURITY (Continued)