•
VTSS Indication - During the sixteen second VTSS arming function, the cluster will flash the security indicator
on and off repeatedly at a steady, fast rate to indicate that the VTSS is in the process of arming. Following
successful VTSS arming, the cluster flashes the security indicator on and off continuously at a slower rate to
indicate that the VTSS is armed. The security indicator continues flashing at the slower rate until the VTSS is
disarmed or triggered. If the VTSS has alarmed and rearmed, the cluster will flash the security indicator at a
steady, slow rate for about thirty seconds after the VTSS is disarmed.
•
SKIS Lamp-On Message - Each time the cluster receives a SKIS lamp-on message from the SKREEM, the
security indicator will be illuminated. The indicator can be flashed on and off, or illuminated solid, as dictated
by the SKREEM message. The indicator remains illuminated solid or continues to flash until the cluster
receives a SKIS lamp-off message from the SKREEM, or until the ignition switch is turned to the Off position,
whichever occurs first. For more information on the SKIS and the security indicator control parameters, (Refer
to 8 - ELECTRICAL/VEHICLE THEFT SECURITY/SENTRY KEY IMMOBILIZER SYSTEM - OPERATION).
•
Communication Error - If the cluster receives no SKIS lamp-on or lamp-off messages from the SKREEM for
ten consecutive message cycles, the security indicator is illuminated by the instrument cluster. The indicator
remains controlled and illuminated by the cluster until a valid SKIS lamp-on or lamp-off message is received
from the SKREEM.
•
Actuator Test - Each time the instrument cluster is put through the actuator test, the security indicator will be
turned on, then off again during the bulb check portion of the test to confirm the functionality of the LED and
the cluster control circuitry.
The instrument cluster circuitry controls the security indicator whenever the ignition switch is in the Off position and
the VTSS is arming, armed, or alarming. Whenever the ignition switch is in the On or Start positions, the SKREEM
performs a self-test to decide whether the SKIS is in good operating condition and whether a valid key is present in
the ignition lock cylinder. The SKREEM then sends the proper lamp-on or lamp-off messages to the instrument
cluster. For further diagnosis of the security indicator or the instrument cluster circuitry that controls the indicator,
(Refer to 8 - ELECTRICAL/INSTRUMENT CLUSTER - DIAGNOSIS AND TESTING). If the instrument cluster
flashes the security indicator upon ignition On, or turns on the security indicator solid after the bulb test, it indicates
that a SKIS malfunction has occurred or that the SKIS is inoperative. The Security indicator is serviced with the
instrument cluster.
TRACTION CONTROL INDICATOR
The traction control indicator gives an indication to the
vehicle operator when the electronic Traction Control
System (TCS) has been activated. This indicator is
controlled by the instrument cluster circuit board
based upon cluster programming and electronic mes-
sages received by the cluster from the Controller Antilock Brake (CAB) over the Controller Area Network (CAN) data
bus.
The traction control indicator is completely controlled by the instrument cluster logic circuit, and that logic will only
allow this indicator to operate when the instrument cluster receives a battery current input on the fused ignition
switch output (run-start) circuit. Therefore, the indicator will always be off when the ignition switch is in any position
except On or Start. The indicator only illuminates when it is switched to ground by the instrument cluster circuitry.
The instrument cluster will turn on the traction control indicator for the following reasons:
•
Bulb Test - Each time the ignition switch is turned to the On position the traction control indicator is illuminated
for about four seconds as a bulb test. The entire bulb test is a function of the CAB.
•
Traction Control Lamp-On Message - Each time the cluster receives a traction control lamp-on message
from the CAB indicating that the TCS has been activated, the traction control indicator will be illuminated. The
indicator remains illuminated until the cluster receives a traction control lamp-off message from the CAB, or
until the ignition switch is turned to the Off position, whichever occurs first.
•
Actuator Test - Each time the cluster is put through the actuator test, the traction control indicator will be
turned on, then off again during the bulb check portion of the test to confirm the functionality of the LED and
the cluster control circuitry.
The CAB continually monitors the traction control switch to determine the proper outputs to the components of the
Antilock Brake System (ABS). The CAB then sends the proper traction control lamp-on and lamp-off messages to
the instrument cluster. For further diagnosis of the traction control indicator or the instrument cluster circuitry that
controls the indicator, (Refer to 8 - ELECTRICAL/INSTRUMENT CLUSTER - DIAGNOSIS AND TESTING). The
Traction Control indicator is serviced with the instrument cluster.
8J - 64
INSTRUMENT CLUSTER - SERVICE INFORMATION
LX