For complete Description and Operation of the
Instrument Cluster, refer to the DR Service Manual
Instrument Cluster Section. For information re-
garding systems such as Wiper/Washer, RKE,
Lighting, etc., refer to those section titles in this
publication and the DR Service Manual.
3.10.1 DIAGNOSTIC SELF TEST
The Instrument Cluster is capable of performing
a Diagnostic Self Test. This self test can be initiated
manually by depressing and holding the trip reset
button while cycling the ignition from the Off to the
On position. The self test can also be activated
using the DRBIIIt. During the self test, all of the
PCI bus indicators will be illuminated. The speed-
ometer, tachometer, fuel gauge, oil pressure gauge,
coolant temperature gauge, and voltage gauge will
position at their calibration points. The VF display
will illuminate all segments and also display the
software version. The chime will sound. When the
self test is complete, the cluster will return to
normal operation. Turning the ignition to the Off
position or the cluster detecting engine RPM
greater than 0 (zero) will stop the self test.
3.11 INTERIOR LIGHTING
The Instrument Cluster controls the Interior/
Courtesy Lamps. The Instrument Cluster activates
the courtesy lamps when either a Dome Lamp
switch is turned on or a door is opened. The Instru-
ment Cluster also monitors the output of the Glove
Box and Map lamps. The Cargo lamps are con-
trolled by the Instrument Cluster, it receives an
output message from the Headlamp switch to turn
on the lamps. The Instrument Cluster provides
battery protection by shutting down the interior
lamps when a door or courtesy/map lamp is left on
or open.
3.12 POWER DOOR LOCKS/REMOTE
KEYLESS ENTRY
The Instrument Cluster in response to the door
lock switches or the RKE module directly controls
the power door lockmotors. The Instrument Cluster
monitors the activation of the door lock motors and
will set diagnostic trouble codes when there is an
open or short condition. When there is a lock or
unlock input from a switch or RKE command, the
Instrument Cluster will activate the appropriate
driver for 300 milliseconds. If a lock or unlock
switch remains active, the request will be ignored
until the switch transitions back to off. The lock
switches are resistive multiplexed input devices
hardwired to the Instrument Cluster.
3.12.1 AUTOMATIC DOOR LOCKS
The Instrument Cluster will automatically lock
all the doors when the vehicle speed exceeds 15
MPH (24 KMH), throttle position exceeds 10 per-
cent and all the doors are closed. If a door is opened
theAutomatic Door Lock feature shall reset and the
Instrument Cluster will lock the doors when the
above conditions are met. This feature is program-
mable by the customer or the DRBIIIt.
3.12.2 CENTRAL LOCKING/UNLOCKING
The Instrument Cluster will lock all doors when
the cylinder lock switch is activated in the 9lock9
position. When the Instrument Cluster receives an
unlock command from the driver cylinder lock
switch, it will unlock only that door. If the Instru-
ment Cluster receives a second command within a
5-second period it will unlock all the remaining
doors. The illuminated entry will activate during
door unlock.
3.12.3 DOOR LOCK INHIBIT
When the key is in the ignition, in any position,
and either front door is open, the door lock switches
LOCK functions are disabled. The UNLOCK func-
tions are still functional. This protects against
locking the vehicle with the keys still in the igni-
tion. The RKE transmitter will still lock the doors
as usual.
3.12.4 ENHANCED ACCIDENT RESPONSE
Upon detection of an airbag deployment by way of
the PCI bus, the Instrument Cluster shall:
• Immediately disable the power door lock output
• Unlock all doors by activating the door unlock
output for approximately 300 milliseconds.
• After actuating the door unlock output, allow the
door lock motors to be activated if the door lock
input has been inactive (not erratic) for 2 seconds
since the reception of the airbag deployment
message.
3.13 REMOTE KEYLESS ENTRY
The remote keyless entry (RKE) feature is used to
control the power door locks and panic feature by
using a remote transmitter (keyfob) and receiver
located within the instrument cluster. The instru-
ment cluster RKE feature controls the driver door
unlock, all doors lock/unlock, horn chirp enabled/
disable, optical chirp enabled/disable, illuminated
entry, the panic feature, initiate customer program-
ming, and arming/disarming the Vehicle Theft Se-
curity System.
When a valid lock message is received from the
receiver, the instrument cluster will:
16
GENERAL INFORMATION
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