Chrysler Concorde 2004 Service Manual page 1531

LH
BRAKES - ANTILOCK BRAKE SYSTEM (Continued)
Fig. 1 Data Link Connector Location
1 - JUNCTION BLOCK
2 - STEERING WHEEL
3 - DATA LINK CONNECTOR
4 - PARKING BRAKE
WARNING: CONDITIONS THAT RESULT IN TURNING
ON THE RED BRAKE WARNING INDICATOR LAMP
MAY INDICATE REDUCED BRAKING ABILITY.
Before road testing a brake complaint vehicle, note
whether the red BRAKE warning indicator lamp,
amber ABS warning indicator lamp, or both are
turned on.
If it is the red BRAKE warning indicator, there is
a brake hydraulic problem that must be corrected
before driving the vehicle. Refer to the Base Brake
System - Diagnosis And Testing. If the MIC deter-
mines the amber ABS warning indicator is not func-
tioning, it will illuminate the red BRAKE warning
indicator.
If the amber ABS warning indicator is on, road test
the vehicle as described below. While the amber ABS
warning indicator is on, the ABS is not functional.
The ability to stop the car using the base brake sys-
tem should not be affected.
If both the red BRAKE and the amber ABS warn-
ing indicators are illuminated, there is possibility
that there is an ABS problem. For some failures the
ABS unit will discontinue ABS as well as EVBP and
illuminate both the red BRAKE and the amber ABS
warning indicators.
reduced. Before road testing, read DTC's and refer
to the Appropriate Diagnostic Information. Also, the
MIC will illuminate both the red BRAKE and the
amber ABS warning indicators if the ABS CAB is not
communicating on the BUS.
Braking ability may
BRAKES - ANTILOCK BRAKE SYSTEM 5 - 65
(6) Turn the key to the OFF position and then
back to the ON position. Note whether the amber
ABS warning lamp continues to stay on.
(7) If the amber ABS warning indicator lamp stays
on, shift into gear and drive the car to a speed of
approximately 25 km/h (15 mph) to complete the ABS
Start-Up and Drive-Off Cycles (see Antilock Brake
System - Operation). If at this time the amber ABS
warning indicator lamp stays on, refer to the Appro-
priate Diagnostic Information.
(8) If the amber ABS warning indicator lamp goes
out at any time, drive the vehicle a short distance.
Accelerate the vehicle to a speed of at least 64 km/h
(40 mph). Bring the vehicle to a complete stop, brak-
ing hard enough to cause the ABS to cycle. Repeat
this action several times. Using the DRBIII , read
and record any Diagnostic Trouble Codes (DTCs). If
any DTCs are present, refer to the Appropriate Diag-
nostic Information.
STANDARD PROCEDURE - ANTILOCK BRAKE
SYSTEM BLEEDING
The base brake's hydraulic system must be bled
anytime air enters the hydraulic system. The ABS
though, particularly the ICU (HCU), should only
need to be bled when the HCU is replaced or
removed from the vehicle. The ABS must always be
bled anytime it is suspected that the HCU has
ingested air. Under most circumstances that require
the bleeding of the brakes hydraulic system, only the
base brake hydraulic system needs to be bled.
When bleeding the ABS system, the following
bleeding sequence must be followed to insure com-
plete and adequate bleeding.
(1) Make sure all hydraulic fluid lines are installed
and properly torqued.
(2) Connect the DRBIII
Link Connector. The connector is located under the
lower steering column cover to the left of the steering
column.
(3) Using the DRBIII , check to make sure the
CAB does not have any fault codes stored. If it does,
clear them using the DRBIII .
WARNING: WHEN BLEEDING THE BRAKE SYSTEM
WEAR SAFETY GLASSES. A CLEAR BLEED TUBE
MUST BE ATTACHED TO THE BLEEDER SCREWS
AND SUBMERGED IN A CLEAR CONTAINER FILLED
PART WAY WITH CLEAN BRAKE FLUID. DIRECT
be THE FLOW OF BRAKE FLUID AWAY FROM YOUR-
SELF AND THE PAINTED SURFACES OF THE VEHI-
CLE. BRAKE FLUID AT HIGH PRESSURE MAY
COME OUT OF THE BLEEDER SCREWS WHEN
OPENED.
scan tool to the Data