Table of Contents
Advertisement
1999 ACCESSORIES & EQUIPMENT
CHRY - Vehicle Communications
Ram Pickup
IDENTIFYING VEHICLE COMMUNICATION PROBLEMS
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
BUS (+) & BUS (-) OPEN, (BUS (+) OPEN OR BUS (-) OPEN)
NOTE:
For connector terminal identification and wiring diagrams,
see BODY CONTROL COMPUTER - INTRODUCTION article. Perform
VERIFICATION TEST VER-1 after each repair.
CAUTION: Always turn ignition off prior to disconnecting any module
connector.
1) Disconnect scan tool. Ensure ignition is on. Using an
external voltmeter, measure voltage between ground and DLC terminal
No. 3 (Violet/Brown wire). If voltage is not 1.8-2.3 volts, go to step
3). If voltage is 1.8-2.3 volts, go to next step.
2) Measure voltage between ground and DLC terminal No. 11
(White/Black wire). If voltage is not 1.8-2.3 volts, go to next step.
If voltage is 1.8-2.3 volts, replace scan tool cable or scan tool.
3) Connect jumper wire between ground and DLC connector
terminal No. 11 (White/Black wire). Turn ignition off. Remove
instrument cluster. Using external ohmmeter, measure resistance
between ground and instrument cluster connector C1 terminal No. 9
(White/Black wire). If resistance is less than 5 ohms, go to next
step. If resistance is 5 ohms or more, repair open White/Black wire.
4) Disconnect jumper wire. Connect jumper wire between ground
and DLC connector terminal No. 3 (White/Black wire). Measure
VEHICLE COMMUNICATION
1999 Dodge Pickup R1500
Advertisement
Chapters
Table of Contents
