SENTRY KEY IMMOBILIZER SYSTEM
WARNING: To avoid personal injury or death, on vehicles equipped with airbags, disable the supplemental
restraint system before attempting any steering wheel, steering column, airbag, occupant classification sys-
tem, seat belt tensioner, impact sensor, or instrument panel component diagnosis or service. Disconnect
and isolate the battery negative (ground) cable, then wait two minutes for the system capacitor to discharge
before performing further diagnosis or service. This is the only sure way to disable the supplemental
restraint system. Failure to take the proper precautions could result in accidental airbag deployment.
The hard wired Sentry Key Immobilizer System (SKIS) components and circuits may be diagnosed and tested using
conventional diagnostic tools and procedures. Refer to the appropriate 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 connectors, splices and grounds.
However, conventional diagnostic methods may not prove conclusive in the diagnosis of the Sentry Key REmote
Entry Module (SKREEM), the ElectroMechanical Instrument Cluster (EMIC), the Powertrain Control Module (PCM),
the Controller Area Network (CAN) data bus, or the electronic message inputs used to provide the electronic fea-
tures of the SKIS. The most reliable, efficient, and accurate means to diagnose the SKREEM, the EMIC, the PCM,
the CAN data bus, and the electronic message inputs for the SKIS requires the use of a diagnostic scan tool. Refer
to the appropriate diagnostic information.
SENTRY KEY IMMOBILIZER SYSTEM DIAGNOSIS
CONDITION
POSSIBLE CAUSES
CORRECTION
SECURITY INDICATOR FAILS
TO LIGHT DURING BULB
TEST
1. Light-Emitting Diode (LED)
faulty.
1. Perform the instrument cluster actuator
test. (Refer to 8 - ELECTRICAL/
INSTRUMENT CLUSTER - DIAGNOSIS
AND TESTING - ACTUATOR TEST)..
2. Fuse faulty.
2. Check the SKREEM fused B(+) fuse and
the fused ignition switch output (run-start)
fuse in the Junction Block (JB). Replace
fuses, if required.
3. Ground path faulty.
3. Check for continuity to ground at the
connector for the SKREEM. Repair wiring, if
required.
4. Battery feed faulty.
4. Check for battery voltage at the
connector for the SKREEM. Repair wiring, if
required.
5. Ignition feed faulty.
5. Check for battery voltage at the
connector for the SKREEM with the ignition
switch in the On position. Repair wiring, if
required.
SECURITY INDICATOR
FLASHES FOLLOWING BULB
TEST
1. Invalid key in ignition switch
lock cylinder.
1. Replace the key with a known valid key.
2. Key-related fault.
2. Use a diagnostic scan tool and the
appropriate diagnostic information for further
diagnosis.
SECURITY INDICATOR
LIGHTS SOLID FOLLOWING
BULB TEST
1. SKIS system malfunction/
fault detected.
1. Use a diagnostic scan tool and the
appropriate diagnostic information for further
diagnosis.
2. SKIS system inoperative.
2. Use a diagnostic scan tool and the
appropriate diagnostic information for further
diagnosis.
8Q - 6
VEHICLE THEFT SECURITY - SERVICE INFORMATION
ND