tronic modules are sending and receiving the proper
messages on the PCI data bus, and that the RKE
receiver is being sent the proper radio frequency sig-
nals by the RKE transmitters to perform its RKE
system functions.
For complete circuit diagrams, refer to Power
Door Locks in the Contents of Group 8W - Wiring
Diagrams.
PRELIMINARY DIAGNOSIS
As a preliminary diagnosis for the RKE system,
note the system operation while you actuate both the
Lock and Unlock functions with the power lock
switches and with the Remote Keyless Entry (RKE)
transmitter. Then, proceed as follows:
• If the entire power lock system fails to function
with either the power lock switches or the RKE
transmitter, check the fused B(+) fuse in the Power
Distribution Center. If the fuse is OK, refer to Door
Module in the Power Lock System section of this
group.
• If the power lock system functions with both
power lock switches, but not with the RKE transmit-
ter, refer to Remote Keyless Entry Transmitter in
the Diagnosis and Testing section of this group.
• If the driver side power lock switch operates
only the driver side front door power lock motor, but
all other power lock motors operate with the passen-
ger side power lock switch or the RKE transmitter,
use a DRB scan tool and the proper Diagnostic Pro-
cedures manual to diagnose the Programmable Com-
munications Interface (PCI) data bus.
If the problem being diagnosed involves only the
Sound Horn on Lock or the Flash Lights with Locks
features, be certain that these programmable fea-
tures are enabled. If the features are enabled and the
service horn and turn signals still operate, the Body
Control Module (BCM) and the PCI data bus must be
tested. For diagnosis of the BCM or the PCI data
bus, the use of a DRB scan tool and the proper Diag-
nostic Procedures manual are recommended.
REMOTE KEYLESS ENTRY TRANSMITTER
(1) Replace the Remote Keyless Entry (RKE)
transmitter batteries. Refer to Remote Keyless
Entry Transmitter Battery Replacement in the
Service Procedures section of this group. Test each of
the transmitter functions. If OK, discard the faulty
batteries. If not OK, go to Step 2.
(2) Program the suspect RKE transmitter and
another known good transmitter into the RKE
receiver. Use a DRB scan tool, as described in the
proper
Diagnostic
Procedures
manual.
Refer
to
Remote Keyless Entry Transmitter Program-
ming in the Service Procedures section of this group.
(3) Test the RKE system operation with both
transmitters. If both transmitters fail to operate the
power lock system, use a DRB scan tool and the
proper Diagnostic Procedures manual for further
diagnosis of the RKE system. If the known good
transmitter operates the power locks and the suspect
transmitter does not, replace the faulty transmitter.
NOTE: Be certain to perform the Remote Keyless
Entry Transmitter Programming procedure again
following this test. This procedure will erase the
access code of the test transmitter from the RKE
receiver.
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 a thin coin, gently pry at
the notch in the center seam of the RKE transmitter
case halves near the key ring until the two halves
unsnap.
(2) Lift the back half of the transmitter case off of
the RKE transmitter.
(3) Remove the two batteries from the RKE trans-
mitter.
(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 RKE transmitter case halves
with each other, and squeeze them firmly and evenly
together until they snap back into place.
NOTE: The RKE system for this model uses a roll-
ing code security strategy. This strategy requires
that synchronization be maintained between the
RKE transmitter and the RKE receiver. RKE trans-
mitter battery removal or replacement can cause a
loss of synchronization. If the RKE receiver fails to
respond to the RKE transmitter following battery
removal or replacement, depress and release the
RKE transmitter Unlock button repeatedly while lis-
tening carefully for the power door locks in the
vehicle to cycle. After between five and eight
presses of the Unlock button, the power door locks
should cycle, indicating that re-synchronization has
occurred.
8P - 12
POWER LOCK SYSTEMS
WJ
DIAGNOSIS AND TESTING (Continued)