Dodge Dakota 2001, Руководство по обслуживанию

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uses its internal electronic programming to deter-
mine whether the received signal is valid and what
function has been requested. If the signal is valid,
the CTM then provides the programmed features.
Besides operating the power lock system and arm-
ing or disarming the VTSS, the RKE system also
controls the following features:
•
Driver Door Unlock Only - On quad cab mod-
els only, if this feature is enabled, the CTM unlocks
only the driver side front door upon receipt of a first
valid Unlock signal through a separate internal relay
and control outputs to the driver side front door
power lock motor. Then upon receipt of a second valid
Unlock signal, the CTM unlocks all of the remaining
doors through a separate internal relay and control
circuits for those power lock motors.
•
Horn Chirp - If this feature is enabled, the
CTM provides a horn chirp by internally pulling the
control coil of the horn relay to ground through a
hard wired circuit output.
•
Illuminated Entry - The CTM provides illumi-
nated entry by internally controlling the current flow
to the courtesy lamps in the vehicle through a hard
wired output circuit.
•
Optical Chirp - If this feature is enabled, the
CTM provides flashes of the park lamps by internally
pulling the control coil of the park lamp relay to
ground through a hard wired circuit output.
•
Panic Mode - The CTM provides the horn pulse
by internally pulling the control coil of the horn relay
through a hard wired circuit output, then flashes the
headlamps
and illuminates the courtesy lamps
through its internal high side control of these cir-
cuits. The CTM also monitors the vehicle speed
through electronic messages it receives from the
Powertrain Control Module (PCM) over the Program-
mable Communications Interface (PCI) data bus net-
work.
The RKE system operates on battery current
received through a fused B(+) circuit from a fuse in
the Junction Block (JB) so that the system remains
functional, regardless of the ignition switch position.
The RKE system can retain the vehicle access codes
of up to four RKE transmitters. The transmitter
codes are retained in RKE system memory, even if
the battery is disconnected. If a transmitter is faulty
or is lost, new transmitter vehicle access codes can be
programmed into the system using a DRBIII
t
scan
tool. Refer to the appropriate diagnostic information.
Many of the electronic features in the vehicle con-
trolled or supported by the CTM are programmable
using the DRBIII
t
scan tool. In addition, the CTM
software is Flash compatible, which means it can be
reprogrammed using Flash reprogramming proce-
dures. However, if any of the CTM hardware compo-
nents are damaged or faulty, the entire CTM unit
must be replaced. The hard wired inputs or outputs
of the CTM can be diagnosed using conventional
diagnostic tools and methods; however, for diagnosis
of the CTM or the PCI data bus, the use of a
DRBIII
t
scan tool is required. Refer to the appropri-
ate diagnostic information.
DIAGNOSIS AND TESTING - POWER LOCK &
REMOTE KEYLESS ENTRY SYSTEM
These tests will help to diagnose the hard wired
components and circuits of the power lock system.
However, these tests may not prove conclusive in the
diagnosis of this system. In order to obtain conclusive
testing of the power lock and RKE systems, the Pro-
grammable Communication Interface (PCI) data bus
network and all of the electronic modules that pro-
vide inputs to, or receive outputs from the power lock
and RKE system components must be checked.
The most reliable, efficient, and accurate means to
diagnose the power lock and RKE systems requires
the use of a DRBIII
t
scan tool. The DRBIII
t
scan
tool can provide confirmation that the PCI data bus
is functional, that all of the electronic modules are
sending and receiving the proper messages on the
PCI data bus, that the Central Timer Module (CTM)
is receiving the proper hard wired inputs, and that
the power lock motors are being sent the proper hard
wired outputs by the CTM.
Refer to the appropriate wiring information. The
wiring information includes wiring diagrams, proper
wire and connector repair procedures, details of wire
harness routing and retention, connector pin-out
information and location views for the various wire
harness connectors, splices and grounds.
PRELIMINARY TESTS
To begin this test, note the system operation while
you actuate both the Lock and Unlock functions with
the power lock switches, the door cylinder lock
switches (if equipped with the optional Vehicle Theft
Security System (VTSS), and the RKE transmitter.
Then, proceed as follows:
•
If the entire power lock system fails to function
with the power lock switches, the door cylinder lock
switches, or the RKE transmitter, check the fused
B(+) fuse in the Junction Block (JB). If the fuse is
OK, proceed to the diagnosis of the power lock
motors. (Refer to 8 - ELECTRICAL/POWER LOCKS/
POWER LOCK MOTOR - DIAGNOSIS AND TEST-
ING).
•
If the power lock system functions with both
power lock switches, and both the door cylinder lock
switches, but not with the RKE transmitter, proceed
to the diagnosis of the transmitter. (Refer to 8 -
ELECTRICAL/POWER LOCKS/REMOTE KEYLESS
8N - 4 POWER LOCKS
AN
POWER LOCKS (Continued)