Identifying Vehicle Communication Problems: Notes
WARNING: This page is about a different car, the 1999 Dodge Pickup and 1999 Dodge Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
Connect scan tool to Data Link Connector (DLC) to retrieve messages. If scan tool message is blank, disconnect scan tool. Ensure ground circuit has continuity at DLC terminal No. 4. Ensure 12 volts exists at DLC terminal No. 16. Check power to DLC terminal No. 16 from Power Distribution Center (PDC) fuse No. 12. Try another scan tool and/or cable. If scan tool DTC or fault message is present, see following bus fault messages list and proceed to appropriate DTC or fault message.
- BUS (+) & BUS (-) OPEN
- BUS (+) OPEN
- BUS (-) OPEN
- BUS (+) & BUS (-) SHORTED TOGETHER
- BUS BIAS LEVEL TOO HIGH
- BUS BIAS LEVEL TOO LOW
- NO BUS BIAS
- NO RESPONSE AIR BAG CONTROL MODULE
- NO RESPONSE CENTRAL TIMER MODULE
- NO RESPONSE INSTRUMENT CLUSTER
- NO RESPONSE POWERTRAIN CONTROL MODULE
- NO RESPONSE COMPASS/MINI-TRIP SYSTEM
- NO RESPONSE RADIO
- NO TERMINATION
- NOT RECEIVING BUS MESSAGES CORRECTLY
- BUS SHORT TO 5 VOLTS
- BUS SHORT TO BATTERY
- BUS SHORT TO GROUND