Operation; Removal; Installation; Data Link Connector - Chrysler Vehicle User Manual

TJ
CONTROLLER ANTILOCK BRAKE (Continued)

OPERATION

The CAB voltage source is through the ignition
switch in the RUN position. The CAB contains dual
microprocessors. A logic block in each microprocessor
receives identical sensor signals. These signals are
processed and compared simultaneously. The CAB
contains a self check program that illuminates the
ABS warning light when a system fault is detected.
Faults are stored in a diagnostic program memory
and are accessible with the DRB scan tool. ABS
faults remain in memory until cleared, or until after
the vehicle is started approximately 50 times. Stored
faults are not erased if the battery is disconnected.

REMOVAL

(1) Remove the negative battery cable from the
battery.
(2) Pull up on the CAB harness connector release
(Fig. 1)and remove connector.
Fig. 1 CAB HARNESS CONNECTOR RELEASE
1 - ABS MODULE
2 - ELECTRICAL CONNECTOR
(3) Remove the pump connector from the CAB.
(4) Remove the CAB mounting bolts.
(5) Remove the CAB from the HCU (Fig. 2).

INSTALLATION

(1) Install CAB to the HCU (Fig. 2).
(2) Install mounting bolts. Tighten to 2 N·m (16 in.
lbs.).
(3) Install the pump electircal connector to the
CAB (Fig. 2).
(4) Install the wiring harness connector to the
CAB and push down on the release to secure the con-
nector.
(5) Install negative battery cable to the battery.
ELECTRONIC CONTROL MODULES
Fig. 2 CONTROLLER AND HCU
1 - CONTROLLER ANTILOCK BRAKE MODULE
2 - HYDRAULIC CONTROL UNIT (H.C.U)
3 - ELECTRICAL CONNECTOR

DATA LINK CONNECTOR

DESCRIPTION - DATA LINK CONNECTOR

The data link connector (DLC) is located at the
lower edge of the instrument panel near the steering
column.

OPERATION - DATA LINK CONNECTOR

The 16–way data link connector (diagnostic scan
tool connector) links the Diagnostic Readout Box
(DRB) scan tool or the Mopar Diagnostic System
(MDS) with the Powertrain Control Module (PCM).
POWERTRAIN CONTROL
MODULE
DESCRIPTION
DESCRIPTION
The PCM is located in the engine compartment
(Fig. 3) . The PCM is referred to as JTEC.

DESCRIPTION - MODES OF OPERATION

As input signals to the Powertrain Control Module
(PCM) change, the PCM adjusts its response to the
output devices. For example, the PCM must calculate
different injector pulse width and ignition timing for
idle than it does for wide open throttle (WOT).
The PCM will operate in two different modes:
Open Loop and Closed Loop.
During Open Loop modes, the PCM receives input
signals and responds only according to preset PCM
programming. Input from the oxygen (O2S) sensors
is not monitored during Open Loop modes.
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