ters (miles). The VFD unit must be displaying the trip odometer information in order for the trip odometer infor-
mation to be reset.
•
Communication Error - If the cluster fails to receive a distance message during normal operation, it will hold
and display the last data received until the ignition switch is turned to the Off position. If the cluster does not
receive a distance message within one second after the ignition switch is turned to the On position, it will
display the last distance message stored in the cluster memory. If the cluster is unable to display distance
information due to an error internal to the cluster, the VFD will display “error”.
•
Actuator Test - Each time the cluster is put through the actuator test, the VFD will step sequentially through
a display of “111111” through “999999”, then display the cluster software version number to confirm the func-
tionality of each of the VFD unit segments and the cluster control circuitry.
The PCM continually monitors the vehicle speed pulse information received from the Body Control Module (BCM),
then sends the proper distance messages to the instrument cluster. For further diagnosis of the odometer/trip odom-
eter or the instrument cluster circuitry that controls these functions, (Refer to 8 - ELECTRICAL/INSTRUMENT
CLUSTER - DIAGNOSIS AND TESTING).
For proper diagnosis of the vehicle speed sensor, the BCM, the PCM, the PCI data bus, or the electronic message
inputs to the instrument cluster that control the odometer/trip odometer, a diagnostic scan tool is required. Refer to
the appropriate diagnostic information.
8J - 130
INSTRUMENT CLUSTER
KJ