Dodge ram truck 3500 1996 Service Manual page 249

BR BRAKES 5 - 65
D I A G N O S I S A N D T E S T I N G (Continued)
DTC DTC DESCRIPTION DIAGNOSIS
6 This code identifies an erratic rear
wheel speed sensor reading.This
code can only be recorded by the
CAB while the CAB is monitoring
a speed senor that identifies the
vehicle is moving.
Components and circuits involved include:
• Intermittent poor connection between terminals 13 and 14 of the
14-way connector and the RWAL WSS.
• Build-up of foreign material on the tip of the RWAL WSS.
• Exciter ring - broken, chipped teeth, teeth that are missing,
exciter ring that is bent.
• RWAL WSS.
• CAB.
The RWAL WSS can be tested by connecting a voltmeter into the RWAL
WSS circuit. Set the voltmeter to the AC scale. Then, rotating the rear
wheels (both wheels must be rotated at same speed and in same
direction) at 5 mph. The RWAL WSS should produce a voltage of at
least 650 mv (rms) and should be steady.
7
This code identifies a short in the
isolation valves circuit.
Components and circuits involved include:
• Short to ground from terminal 1 in the 14-way connector to the
RWAL valve.
© Short in the RWAL valve's isolation solenoid.
• CAB.
Check resistance of the isolation solenoid and circuit. Resistance of the
solenoid should be approximately 3-6 ohms.
WARNING: CAUTION:
I t I s
important to
r e m e m b e r t h a t
the short
to ground
m u s t
be
r e p a i r e d
prior
t o i n s t a l l i n g a
CAB for
t h i s
DTC.
8 This code identifies a short in the
dump valve circuit.
Components and circuits involved include:
• Short to ground from terminal 8 in the 14-way connector to the
RWAL valve.
© Short in the RWAL valve's dump solenoid.
• CAB.
Check resistance of the dump solenoid and circuit. Resistance of the
solenoid should be approximately 2-3 ohms.
WARNING: CAUTION: It is important to remember that the short
to ground
m u s t
be repaired
p r i o r
to
i n s t a l l i n g a
CAB for this DTC.
9
This code usually identifies an
open in the RWAL WSS circuit.
Components and circuits involved include:
® Open circuit between terminals 13 and 14 and the RWAL WSS
• Poor connection in the 14-way connector.
• Poor connection at the RWAL WSS.
• RWAL WSS.
• CAB.
The RWAL WSS should have a resistance between 1000 and 2500
ohms.
10 This code usually identifies a short
in the RWAL WSS circuit.
Components and circuits involved include:
© Short circuit between terminals 13 and 14 and the RWAL WSS
© Short circuit between terminals 13 and 14, the RWAL WSS and a
ground.
• RWAL WSS.
• CAB.
The RWAL WSS should have a resistance between 1000 and 2500
ohms.