Instrument Cluster / Carrier: Testing and Inspection

DIAGNOSTIC PROCEDURE
In order to diagnose the instrument cluster function, a DRB scan tool and the proper Body Diagnostic Procedures are required.

As a quick diagnosis, the cluster will perform a function check immediately after the ignition is switched to the RUN/START position. The electronic display, odometer and transmission range indicator and all warning lamps except:
- High beam
- Turn signal will illuminate for a brief period.

If the cluster is not receiving CCD bus messages, the cluster will appear nonfunctional except for the continuously illuminated airbag indicator and NO BUS message displayed.

If the cluster is not receiving CCD bus messages, refer to the Powertrain Management/Computers and Control Systems/pre-diagnostic test described in proper Body Diagnostic Procedures or refer to the Instrument Panel, Gauges and Warning Indicators/Instrument Panel/Instrument Cluster Self-Diagnostic Test.

INSTRUMENT CLUSTER SELF-DIAGNOSTICS
Initiate instrument cluster self-diagnostic by depressing the odometer/trip reset button while turning the ignition key to the RUN/START position. This will cycle an electronic display segment check and illumination in sequence of all CCD bus activated cluster warning indicators. There are four Check (CHEC) functions:
1. CHEC GAUGE DISPLAY
2. CHEC 2-WARNING LAMP DISPLAY
3. CHEC 3-LIQUID CRYSTAL DISPLAY (LCD) - checks the odometer/trip meter
4. CHEC 4-TRANSMISSION RANGE INDICATOR VF DISPLAY (Vacuum Fluorescent)

If the diagnostic procedure determines that a replacement of an instrument cluster component is required, refer to the proper component removal and installation procedure.




CHEC 1-GAUGE DISPLAY
1. If all gauges fail to move, replace Cluster Printed Circuit (PC) Board.
2. If any gauge fails to move, replace the gauge assembly.
3. If any gauge(s) is not in the proper position, replace Cluster Printed Circuit Board.




CHEC 2-WARNING LAMP DISPLAY
1. If any lamp does not light, check lamp.
2. If lamp is not OK, replace lamp.
3. If lamp is OK, replace Cluster Printed Circuit Board.




CHEC 3-LIQUID CRYSTAL DISPLAY (LCD)
If any LCD segment does not light, replace Odometer/Transmission Range Indication.




CHEC 4-TRANSMISSION RANGE INDICATOR VF DISPLAY
If any LCD segment does not light, replace Odometer/Transmission Range Indicator.