Dodge 2004 Neon SRT4, Руководство по диагностике

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variations in inflation pressure can produce inaccu-
rate wheel speed signals; however, the system will
continue to function when using the correct factory
mini-spare.
3.2 ABS DIAGNOSTIC TROUBLE CODES
The Teves Mark 20e Antilock Brake System
(ABS) module may report any of the following
diagnostic trouble codes:
• BUS System Communication Failure
• CAB Internal Failure
•
Cluster Lamp Failure
• Left Front Sensor Circuit Failure
•
Left Front Wheel Speed Signal Failure
• Left Rear Sensor Circuit Failure
•
Left Rear Wheel Speed Signal Failure
• Pump Circuit Failure
• Right Front Sensor Circuit Failure
• Right Front Wheel Speed Signal Failure
• Right Rear Sensor Circuit Failure
•
Right Rear Wheel Speed Signal Failure
• System Over Voltage
•
System Under Voltage
• Valve Power Feed Failure
Diagnostic trouble codes are retained in memory
until erased using the DRBIII
t
, or automatically
erased after 255 key cycles or 3500 miles.
3.2.1 SYSTEM INITIALIZATION
System initialization starts when the key is
turned to “run”. At this point, the CAB performs a
complete self-check of all electrical components in
the antilock brake systems. The ABS and brake
warning lamps will illuminate for 4 seconds with
ignition on.
At 20 km/h (12 mph) a dynamic test is performed.
This will momentarily run the pump/motor. If dur-
ing the dynamic test, the brake pedal is depressed,
the driver may feel the test through brake pedal
pulsations. This is a normal condition.
If any component sets a trouble code during
system initialization or dynamic check, the CAB
will illuminate the ABS warning lamp.
3.2.2 DIAGNOSTIC MODE
For a Mark 20e system to enter diagnostic mode,
vehicle speed must be below 10 km/h (6 mph) and
no ABS condition present. If vehicle speed is not
below 10 km/h (6 mph), a “no response” message
could be displayed by the DRBIII
t
. The following
are characteristics of diagnostic mode:
• The amber ABS and red brake warning indicator
will blink rapidly. If a hard trouble code is
present, such as a CAB Power Feed Circuit
diagnostic trouble code, the indicator will be
illuminated without blinking until the diagnostic
trouble condition is corrected.
•
Antilock operation is disabled.
3.2.3 INTERMITTENT DIAGNOSTIC
TROUBLE CODES
If the malfunction is not present while perform-
ing a test procedure, the diagnostic procedures will
not locate the problem. In this case, the code can
only suggest an area to inspect. Check for the
following:
•
loose or corroded conditions
• damaged components (sensors, tone wheels)
•
damaged wiring
• excessive axle shaft runout
• hydraulic system leaks
• foundation (non-ABS) brake system problems
If no obvious problems are found, erase diagnostic
trouble codes and, with the key on, wiggle the wire
harness and connectors. Recheck for codes periodi-
cally while working through the system. This pro-
cedure may uncover a difficult to locate malfunc-
tion.
3.3 FREEZE FRAME
Freeze Frame takes a ‘‘snapshot’’ of specific vehi-
cle information the instant an ABS failure is recog-
nized and stores this information into the CAB
memory. This information can be accessed using the
DRBIII
t
to help diagnose the fault. Freeze Frame
will capture the first time failure or only a new
failure that occurs during the current ignition cycle.
3.4 USING THE DRBIII
T
Refer to the DRBIII
t
user’s guide for instructions
and assistance with reading diagnostic trouble
codes, erasing diagnostic trouble codes and other
DRBIII
t
functions.
3.5 DRBIII
T
ERROR MESSAGES
Under normal operation, the DRBIII
t
will dis-
play one of only two error messages:
– User-Requested WARM Boot or User-
Requested COLD Boot
4
GENERAL INFORMATION