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Test 14A - Not Receiving Bus Messages Correctly

NOTE: For connector terminal identification, see CONNECTOR  IDENTIFICATION. For wiring diagram, see WIRING DIAGRAMS  . Perform TEST VER-1 after each repair.
CAUTION: Always turn ignition switch to OFF position prior to disconnecting or connecting any module connector.
  1. Using DRB, indicate whether vehicle is equipped with specific module. See MODULE APPLICATIONS table under IDENTIFICATION. Turn ignition off. Disconnect Transmission Control Module (TCM), if equipped. TCM is located on left side of engine compartment, near cowl. Turn ignition on. If DRB does not display NOT RECEIVING BUS MESSAGES CORRECTLY, replace TCM.
  2. If DRB displays NOT RECEIVING BUS MESSAGES CORRECTLY, turn ignition off and disconnect Powertrain Control Module (PCM). PCM is located between Data Link Connector (DLC) and battery, on fenderwell. Turn ignition on. If DRB does not display NOT RECEIVING BUS MESSAGES CORRECTLY, replace PCM.
  3. If DRB displays NOT RECEIVING BUS MESSAGES CORRECTLY, turn ignition off and disconnect Controller Anti-Lock Brake (CAB), if equipped. CAB is located on left fenderwell of engine compartment, behind anti-lock brake pump motor. Turn ignition on. If DRB does not display NOT RECEIVING BUS MESSAGES CORRECTLY, replace CAB.
  4. If DRB displays NOT RECEIVING BUS MESSAGES CORRECTLY, disconnect traveler module, if equipped. Traveler module is located in bottom of center section of dash. Turn ignition on. If DRB does not display NOT RECEIVING BUS MESSAGES CORRECTLY, replace traveler module.
  5. If DRB displays NOT RECEIVING BUS MESSAGES CORRECTLY, turn ignition off and disconnect Mechanical Instrument Cluster (MIC) or Electronic Instrument Cluster (EIC). Turn ignition on. If DRB does not display NOT RECEIVING BUS MESSAGES CORRECTLY, replace MIC or EIC.
  6. If DRB displays NOT RECEIVING BUS MESSAGES CORRECTLY, turn ignition off and disconnect Vehicle Theft Alarm (VTSS) module, if equipped. VTSS module is located in back of glove box. Turn ignition on. If DRB does not display NOT RECEIVING BUS MESSAGES CORRECTLY, replace VTSS module. If DRB displays NOT RECEIVING BUS MESSAGES CORRECTLY, turn ignition off and wait 5 minutes.
    CAUTION: Ensure ignition is off for 5 minutes before proceeding.
  7. Disconnect Air Bag System Control Module (ABSCM). ABSCM is located under center of instrument panel. Turn ignition on. If DRB does not display NOT RECEIVING BUS MESSAGES INCORRECTLY, replace ABSCM.
  8. If DRB displays NOT RECEIVING BUS MESSAGES INCORRECTLY, disconnect Auto Temperature Control (ATC) head, if equipped. Turn ignition on. If DRB does not display NOT RECEIVING BUS MESSAGES CORRECTLY, replace ATC.
  9. If DRB displays NOT RECEIVING BUS MESSAGES CORRECTLY, turn ignition off and disconnect Overhead Traveler Information System (OTIS) module, if equipped. OTIS module is located at center of roof, above visors. Turn ignition on. If DRB does not display NOT RECEIVING BUS MESSAGES CORRECTLY, replace OTIS module.
  10. If DRB displays NOT RECEIVING BUS MESSAGES CORRECTLY, turn ignition off and disconnect Body Control Module (BCM), if equipped. BCM is located behind right kick panel.
  11. Turn ignition on. If DRB does not display NOT RECEIVING BUS MESSAGES CORRECTLY, replace BCM. If DRB displays NOT RECEIVING BUS MESSAGES CORRECTLY, replace DRB cable or cartridge as necessary.
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