Jeep Cherokee 2000 Service Manual - page 526
If not OK, repair the shorted circuit or component as
required and replace the faulty fuse.
(2) Disconnect and isolate the battery negative
cable. Remove the Remote Keyless Entry (RKE)
receiver from the headliner. Unplug the wire harness
connector from the RKE receiver.
(3) Check the wire harness connector and the
receptacle in the RKE receiver for loose, corroded, or
damaged terminals and pins. If OK, go to Step 4. If
not OK, repair as required.
(4) Check for continuity between each of the two
ground circuit cavities of the RKE receiver wire har-
ness connector and a good ground. In each case,
there should be continuity. If OK, go to Step 5. If not
OK, repair the circuit to ground as required.
(5) Connect the battery negative cable. Check for
battery voltage at each of the two fused B(+) circuit
cavities of the RKE receiver wire harness connector.
If OK, go to Step 6. If not OK, repair the open circuit
to the PDC or the junction block as required.
(6) If the problem being diagnosed involves only
the RKE horn chirp feature, go to Step 10. If the
problem being diagnosed involves only the RKE illu-
minated entry feature, go to Step 9. If the problem
being diagnosed involves only the RKE power lock
feature, go to Step 7.
(7) Disconnect and isolate the battery negative
cable. Unplug the 8-way Passenger Door Module
(PDM) wire harness connector. Check for continuity
between the lock request circuit cavity of the RKE
receiver wire harness connector and a good ground.
Repeat the test between the unlock request circuit
cavity of the RKE receiver wire harness connector
and a good ground. In each case, there should be no
continuity. If OK, go to Step 8. If not OK, repair the
shorted circuit as required.
(8) Check for continuity between the lock request
circuit cavities of the RKE receiver wire harness con-
nector and the 8-way PDM wire harness connector.
Repeat the test between the unlock request circuit
cavities of the RKE receiver wire harness connector
and the 8-way PDM wire harness connector. In each
case, there should be continuity. If OK, replace the
faulty RKE receiver. If not OK, repair the open cir-
cuit as required.
(9) Check for continuity between the door ajar cir-
cuit cavity of the RKE receiver wire harness connec-
tor and a good ground with the driver door closed.
There should be no continuity until the driver door is
opened. If OK, replace the faulty RKE receiver. If not
OK, repair the circuit or replace the faulty driver
door ajar switch as required.
(10) Unplug the horn relay from the junction
block. Check for continuity between the horn relay
output circuit cavity of the RKE receiver wire har-
ness connector and a good ground. There should be
no continuity. If OK, go to Step 11. If not OK, repair
the short circuit to the horn relay as required.
(11) Check for continuity between the horn relay
output circuit cavity of the RKE receiver wire har-
ness connector and the junction block cavity for the
horn relay coil ground terminal (85). There should be
continuity. If OK, replace the faulty RKE receiver. If
not OK, repair the open circuit to the junction block
as required.
SERVICE PROCEDURES
REMOTE KEYLESS ENTRY TRANSMITTER
BATTERY REPLACEMENT
The Remote Keyless Entry (RKE) transmitter case
snaps open and shut for battery access. To replace
the RKE transmitter batteries:
(1) Using a trim stick or another suitable wide
flat-bladed tool, gently pry at the center seam of the
transmitter case halves near the key ring until the
two halves unsnap.
(2) Lift the back half of the transmitter case off of
the transmitter.
(3) Remove the two batteries from the transmitter.
(4) Replace the two batteries with new Panasonic
CR2016, or their equivalent. Be certain that the bat-
teries are installed with their polarity correctly ori-
ented.
(5) Align the two transmitter case halves with
each other, and squeeze them firmly together until
they snap back into place.
REMOTE KEYLESS ENTRY TRANSMITTER
PROGRAMMING
To program the Remote Keyless Entry (RKE)
transmitter access codes into the RKE receiver
requires the use of a DRB scan tool. Refer to the
proper Diagnostic Procedures manual for more infor-
mation.
REMOTE KEYLESS ENTRY RECEIVER
PROGRAMMING
The optional Remote Keyless Entry (RKE) system
for this vehicle has a customer programmable horn
chirp feature. The horn chirp is requested by the
RKE receiver through a hard-wired circuit to the
horn relay, whenever a valid Lock message is
received from a programmed RKE radio transmitter.
The purpose of the horn chirp is to provide the
vehicle operator with an audible verification that the
Lock request has been received by the RKE receiver.
However, for any number of reasons, some customers
may prefer that this feature be disabled. This RKE
system allows them that option.
8P - 6
POWER LOCK SYSTEMS
XJ
DIAGNOSIS AND TESTING (Continued)