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Any PCI BUS Cluster Indicator Inoperative

NOTE: Before proceeding with test, diagnose any stored PCM DTCs first. See RETRIEVING DIAGNOSTIC TROUBLE CODES  under SELF-DIAGNOSTIC SYSTEM.
  1. Connect scan tool to Data Link Connector (DLC), under lower left side of instrument panel. Turn ignition on. Using scan tool, select SYSTEM MONITORS, then J1850 MODULE SCAN. If scan tool displays MIC PRESENT on the BUS, go to next step. If scan tool does not display MIC PRESENT on the BUS, perform appropriate test under COMMUNICATIONS. See DIAGNOSTIC TROUBLE CODE IDENTIFICATION  table under SELF-DIAGNOSTIC SYSTEM.
  2. Using scan tool, select BODY, MIC, then MODULE DISPLAY. If scan tool displays NO RESPONSE FROM MIC, go to BUS +/- SIGNALS OPEN OR NO RESPONSE FROM INSTRUMENT CLUSTER  under COMMUNICATIONS. If scan tool does not display NO RESPONSE FROM MIC, go to next step.
  3. Using scan tool, select BODY, MIC, SYSTEM TESTS, then PCM MONITOR. If scan tool displays PCM INACTIVE on the BUS, go to NO RESPONSE FROM PCM (PCI BUS)  under COMMUNICATIONS. If scan tool does not display PCM INACTIVE on the BUS, go to next step.
  4. Depress and hold odometer trip/reset button while cycling ignition off, then on. To begin self-test, release odometer trip/reset button after odometer displays CHEC. If inoperative PCI BUS cluster indicator does not illuminate during self-test, replace instrument cluster. See INSTRUMENT CLUSTER  under REMOVAL & INSTALLATION. If inoperative PCI BUS cluster indicator illuminates during self-test, instrument cluster is operating properly.
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