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Instrument Cluster Diagnostic System Check

  1. Connect scan tool to Data Link Connector (DLC). If scan tool powers up, go to next step. If scan tool does not power up, go to SCAN TOOL DOES NOT POWER UP  .
  2. Turn ignition on. Following scan tool manufacturer's instructions, attempt to establish communication with Electronic Brake Control Module (EBCM), Instrument Cluster (IPC), Powertrain Control Module (PCM) and Sensing Diagnostic Module (SDM). If communication with all modules is established, go to next step. If communication with any module is not established, a communication problem exists with class 2 device. Repair serial data bus circuit between DLC and module in which communication was not established. See appropriate wiring diagram in DATA LINK CONNECTORS article in WIRING DIAGRAMS.
  3. Select display DTC function for EBCM, IPC, PCM and SDM. Record any DTCs that are displayed and module that set the DTC. If any DTCs are displayed, perform appropriate test. See DIAGNOSTIC TROUBLE CODE INDEX  table. If no DTCs are displayed, perform appropriate test under SYSTEM TESTS  .
DIAGNOSTIC TROUBLE CODE INDEX

DTC  Description 
B1000  Instrument Panel Cluster Malfunction
UXXXX (1)
(1) For any DTC beginning with the letter "U", a communication problem exists with class 2 device. Repair serial data bus circuit between DLC and module in which communication was not established. See DATA LINK CONNECTORS article in WIRING DIAGRAMS.
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