Dodge RAM TRUCK 1500 1995 Service Manual page 1199

B R
GENERAL DIAGNOSIS—DIESEL ENGINE 14 -117
DRB SCAN TOOL
For operation of the DRB scan tool, refer to the ap­
propriate Powertrain Diagnostic Procedures service
manual.
DIAGNOSTIC TiOtJIlE CODE (DTC)
On the following pages, a list of diagnostic trouble
codes is provided for all diesel powered vehicles. A
DTC indicates that the powertrain control module
(PCM) has recognized an abnormal signal in a circuit
or the system. A DTC may indicate the result of a
failure, but never identify the failed component di­
rectly.
J9214-20
D-l GROUND
D-2 N/C
D-3 " SCI TRANS
D-4 SCI RECEIVE |
D-5
IGNITION
D-6
NOT USED !
Fig. 39 Data Link Connector Schematic
D I A G N O S T I C T R O U B L E C O D E D E S C R I P T I O N S
Diagnostic
Trouble Code
DRB Scan Tool Display Description ©f Diagnostic Trouble Code
11* No Crank Reference Signal at PCM
12* None
15** No Vehicle Speed Sensor Signal
23** Intake Air Temp Sensor Voltage Low
or
Intake Air Temp Sensor Voltage High
24** Throttle Position Sensor Voltage High
or
Throttle Position Sensor Voltage Low
33* A/C Clutch Relay Circuit
34* Speed Control Solenoid Circuits
or
Speed Control Switch Always Low
or
No crank reference signal detected during en­
gine cranking.
Direct battery input to PCM was disconnected
within the last 50 Key-on cycles.
No vehicle distance (speed) sensor signal de­
tected during road load conditions.
Intake manifold air temperature sensor input
below the minimum acceptable voltage.
Intake manifold air temperature sensor input
above the maximum acceptable voltage.
Throttle position sensor input above the maxi­
mum acceptable voltage (automatic transmis­
sion only).
Throttle position sensor input below the mini­
mum acceptable voltage (automatic transmis­
sion only).
An open or shorted condition detected in the
A/C clutch relay circuit.
An open or shorted condition detected in the
Speed Control vacuum or vent solenoid cir­
cuits.
Speed Control switch input below the mini­
mum acceptable voltage.
* Check Engine Lamp will not illuminate at all times if this Diagnostic Trouble Code was recorded. Cycle
Ignition key as described in manual and observe code flashed by Check Engine lamp.
** Check Engine Lamp will illuminate during engine operation if this Diagnostic Trouble Code was recorded.