firerich

Where Is the Alarm Receiver and how do I get to it?
I have a 3.1 WJ 2000 Grand Cherokee

Kyle

Im not 100% sure but if its like the XJ it may be behind the rear view mirror.

tsconver

here is info from the 03 FSM probably similar for earlier WJs first is the theft system and second is the keyless entry not sure what part you need to work on.

VEHICLE THEFT SECURITY SYSTEM
The vehicle theft security system (VTSS) is controlled
by the body control module, which monitors
vehicle doors, liftgate, liftglass and the ignition for
unauthorized operation. The alarm activates by
sounding the horn, flashing the headlamps, hazard
lamps, and the VTSS indicator lamp. The VTSS
does not prevent engine operation, this is done
with the sentry key immobilizer module. Passive
arming occurs upon normal vehicle exit by removing
the ignition key, opening the driver door, locking
the doors with the power lock, and closing the
driver door or locking the doors with RKE. The
indicator lamp on the dash will flash for 15 seconds,
showing that arming is in progress. If no
monitored systems are activated during this period,
the system will arm and the indicator will
flash at a slower rate. When something triggers the
alarm, the system will signal the headlamps, park
lamps, and horn for about 18 minutes.


3.7.4 REMOTE KEYLESS ENTRY
When the lock button on the transmitter is
pressed, all locks will lock, illuminated entry will
be turned off, (providing all doors are closed) and
the vehicle theft security system (if equipped) will
be armed. When the unlock button on the transmitter
is pressed one time, the driver front door
will unlock, the illuminated entry will turn on the
courtesy lamps, the vehicle theft security system (if
equipped) will be disarmed. When the button is
pressed a second time, the other doors will unlock.
This feature is programmable to open all doors on
one press using the EVIC or the DRBIIIt.
The passenger door module (PDM) contains the
RKE receiver. When the PDM receives a valid
signal from the RKE transmitter, it will send a
signal on the PCI bus to lock or unlock the doors.
11
GENERAL INFORMATION
The RKE transmitter uses radio frequency signals
to communicate with the RKE receiver. If vehicle is
equipped with the memory system, the memory
message will be received as to which transmitter
sent the signal (1 or 2).

tsconver

if you are more specific with yor problem I can try to find it in the FSM for you.

firerich

basically I have to be virtually on top of the receiver in order for the remote to work. I have replaced both batteries in both fobs, and neither will work if I am further than a metre away from the car. I thought that maybe the receiver was playing up? can I change the reciever without reprogramming? thanks

Mykal

Did you use the eraser on the contacts in the remote?

firerich

yes cleaned contacts, it now works every time when i stand at the passenger door next to the receiver. But wont work when i am over a metre away. strange?

Mykal

Yes it is. I had your exact problem when I first bought my WJ. But I cleaned the contacts and it fixed it.

Sorry I cant help you more.

tsconver

The 03 FSM suggests that it can just be swapped out with no programming required here is teh section on replacing the door modules. The PDM is the passenger one and has the rF receiver built into it.

Remote Keyless Entry - The PDM monitors
and transmits the status of the Remote Keyless
Entry (RKE) system and provides support for the
RKE Lock (with the optional horn chirp and park
Fig. 7 Door Module
1 - FRONT DOOR TRIM PANEL
2 - SCREW (5)
3 - DOOR MODULE
8E - 8 ELECTRONIC CONTROL MODULES WJ
DOOR MODULE (Continued)
lamp flash features), Unlock with the optional RKE
unlock, and Panic Mode functions. The optional RKE
features are programmable.

DIAGNOSIS AND TESTING - DOOR MODULE
WARNING: ON VEHICLES EQUIPPED WITH AIRBAGS,
DISABLE THE AIRBAG SYSTEM BEFORE
ATTEMPTING ANY STEERING WHEEL, STEERING
COLUMN, OR INSTRUMENT PANEL COMPONENT
DIAGNOSIS OR SERVICE. DISCONNECT AND ISOLATE
THE BATTERY NEGATIVE (GROUND) CABLE,
THEN WAIT TWO MINUTES FOR THE AIRBAG SYSTEM
CAPACITOR TO DISCHARGE BEFORE PERFORMING
FURTHER DIAGNOSIS OR SERVICE. THIS
IS THE ONLY SURE WAY TO DISABLE THE AIRBAG
SYSTEM. FAILURE TO TAKE THE PROPER PRECAUTIONS
COULD RESULT IN ACCIDENTAL AIRBAG
DEPLOYMENT AND POSSIBLE PERSONAL
INJURY.
The hard wired inputs to and outputs from the
Driver Door Module (DDM) or the Passenger Door
Module (PDM) may be diagnosed and tested using
conventional diagnostic tools and procedures. It is
suggested that the proper operation of the inoperative
power window motor, power door lock motor,
power liftgate lock motor, power mirror motors, or
heated mirror grid be confirmed using jumper wires
to bypass the door module. If the inoperative component
operates when the door module is bypassed,
check the circuits between the component and the
door module, as well as the fused B(+) and ground
circuits of the door module for shorts or opens.
These conventional diagnostic methods may not
prove conclusive in the diagnosis of the DDM or the
PDM. In order to obtain conclusive testing of these
modules, the Programmable Communications Interface
(PCI) data bus network and all of the modules
that provide inputs to or receive outputs from the
door modules must also be checked. The most reliable,
efficient, and accurate means to diagnose the
DDM, the PDM, the PCI data bus network, and the
modules that provide inputs to or receive outputs
from the door modules requires the use of a DRBIIIt
scan tool and the appropriate diagnostic information.
REMOVAL
(1) Disconnect and isolate the battery negative
cable.
(2) Remove the trim panel from the front door.
(Refer to 23 - BODY/DOOR - FRONT/TRIM PANEL -
REMOVAL).
(3) Remove the door module from the back of the
front door trim panel (Fig. 8).
(4) Remove the door module from the front door
trim panel.
INSTALLATION
(1) Position the door module onto the front door
trim panel.
(2) Install the door module to the back of the front
door trim panel (Fig. 8). Tighten the screws to 2.2
N·m (20 in. lbs.).
(3) Reinstall the trim panel onto the front door.
(Refer to 23 - BODY/DOOR - FRONT/TRIM PANEL -
INSTALLATION).
(4) Reconnect the battery negative cable.