Dodge ZB 2005, Руководство по обслуживанию

Страница: 1825 / 1873

3.2.1 ABS 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.
At 20 km/h (12 mph) a dynamic test may be
performed. If the brake lamp switch is activated the
test will be run at 40 km/h (24 mph) regardless of
the brake lamp switch state. This will momentarily
run the pump/motor. If during the dynamic test, the
driver has his/her foot on the brake pedal, he/she
may feel the test through brake pedal pulsations.
This is a normal condition.
If any component causes a diagnostic trouble code
during system initialization or dynamic check, the
CAB will request the ABS indicator to illuminate.
3.2.2 DIAGNOSTIC MODE
For a Mark 20e system to enter a 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’’ mes-
sage could be displayed by the DRBIII
t
. The follow-
ing are characteristics of diagnostic mode:
•
The amber ABS warning indicator will blink
rapidly. If a hard trouble code is present, such as
a CAB Power Feed Circuit diagnostic trouble
code, the ABS warning indicator will be illumi-
nated without blinking until the diagnostic trou-
ble code 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:
• mechanical interference with brake or accelera-
tor pedal
•
loose or corroded conditions
• damaged components (sensors, tone wheels,
pedal drive cable)
• damaged wiring
• excessive axle shaft runout
• loose pedal mounting
•
hydraulic system leaks
• regular brake system problems, non-ABS related
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 as you work through the system. This proce-
dure may uncover a difficult to locate malfunction.
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
If the DRBIII
t
should display any other error
message, record the entire display and call the
STAR Center for information and assistance. This
is a sample of such an error message display:
ver: 2.14
date: 26 Jul93
file: key_itf.cc
date: Jul 26 1993
line: 548
err: 0x1
User-Requested COLD Boot
Press MORE to switch between this display
and the application screen.
Press F4 when done noting information.
3.5.1 DRBIII
T
DOES NOT POWER UP
(BLANK SCREEN)
If the LED’s do not light or no sound is emitted at
start up, check for loose cable connections or a bad
cable. Check the vehicle battery voltage (data link
16-way connector cavity 16). A minimum of 11 volts
is required to adequately power the DRBIII
t
. Also
check for a good ground at the DLC.
If all connections are proper between the
DRBIII
t
and the vehicle or other devices, and the
vehicle battery is fully charged, an inoperative
DRBIII
t
may be the result of faulty cable or vehicle
wiring.
4
GENERAL INFORMATION