Test 14A - Not Receiving Bus Messages Correctly

NOTE: For connector terminal identification, see CONNECTOR IDENTIFICATION in TESTS W/CODES - BODY CONTROL COMPUTER article. For wiring diagram, see the appropriate WIRING DIAGRAMS article in the ENGINE PERFORMANCE section. After each repair, perform TEST VER-1.

WIRING DIAGRAMS - 2.5L TBI
WIRING DIAGRAMS - 2.5L FLEXIBLE FUEL
WIRING DIAGRAMS - 3.0L
CAUTION: Always turn ignition switch to OFF position prior to disconnecting or connecting any module connector.
1. Using scan tool, indicate whether vehicle is equipped with specific module. See MODULE APPLICATIONS table under IDENTIFICATION in TESTS W/CODES - BODY CONTROL COMPUTER article. 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 scan tool does not display NOT RECEIVING BUS MESSAGES CORRECTLY, replace TCM.
2. If scan tool 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 scan tool does not display NOT RECEIVING BUS MESSAGES CORRECTLY, replace PCM.
3. If scan tool 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 scan tool does not display NOT RECEIVING BUS MESSAGES CORRECTLY, replace CAB.
4. If scan tool displays NOT RECEIVING BUS MESSAGES CORRECTLY, disconnect traveler module, if equipped. Traveler module is located behind right side of dash, below glove box. Turn ignition on. If scan tool does not display NOT RECEIVING BUS MESSAGES CORRECTLY, replace traveler module.
5. If scan tool displays NOT RECEIVING BUS MESSAGES CORRECTLY, turn ignition off and disconnect Mechanical Instrument Cluster (MIC) or Electronic Instrument Cluster (EIC). Turn ignition on. If scan tool does not display NOT RECEIVING BUS MESSAGES CORRECTLY, replace MIC or EIC.
6. If scan tool 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 scan tool does not display NOT RECEIVING BUS MESSAGES CORRECTLY, replace VTSS module.
7. If scan tool displays NOT RECEIVING BUS MESSAGES CORRECTLY, turn ignition off and disconnect compass/mini-trip module, if equipped. Compass/mini-trip module is located at center of roof, above visors. Turn ignition on. If scan tool does not display NOT RECEIVING BUS MESSAGES CORRECTLY, replace compass/mini-trip module.
8. If scan tool displays NOT RECEIVING BUS MESSAGES CORRECTLY, turn ignition off. Disconnect Infinity CD player. Turn ignition on. If scan tool does not display NOT RECEIVING MESSAGES CORRECTLY, replace CD player.
9. If scan tool displays NOT RECEIVING MESSAGES CORRECTLY, turn ignition off and wait 2 minutes.
  CAUTION: Ensure ignition is off for 2 minutes before proceeding.
10. Disconnect Air Bag System Control Module (ABSCM). ABSCM is located under center of instrument panel. Turn ignition on. If scan tool does not display NOT RECEIVING BUS MESSAGES INCORRECTLY, replace ABSCM.
11. If scan tool displays NOT RECEIVING BUS MESSAGES INCORRECTLY, turn ignition off and disconnect ATC head (A/C-heater control panel), if equipped. Turn ignition on. If scan tool does not display NOT RECEIVING BUS MESSAGES CORRECTLY, replace ATC head.
12. If scan tool 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 scan tool does not display NOT RECEIVING BUS MESSAGES CORRECTLY, replace OTIS module.
13. If scan tool displays NOT RECEIVING BUS MESSAGES CORRECTLY, turn ignition off and disconnect Body Control Module (BCM), if equipped. BCM is located behind right kick panel.
14. Turn ignition on. If scan tool does not display NOT RECEIVING BUS MESSAGES CORRECTLY, replace BCM. If scan tool displays NOT RECEIVING BUS MESSAGES CORRECTLY, replace scan tool cable or cartridge as necessary.