Chrysler 1997 Stratus Convertible RHD Service Manual page 378

8P - 6 POWER DOOR LOCKS
DIAGNOSIS AND TESTING (Continued)
DIAGNOSTIC CONDITIONS
When trouble shooting problems with the Remote
Keyless Entry System, always verify that the power
door lock/unlock switches are functional. If the doors
do not lock/unlock with the power switches, the fol-
lowing modules should be analyzed: Lock/Unlock
Switches, Body Control Module, and the door lock/
unlock latches. Refer to Group 8W, Wiring Diagrams.
FUSE TEST
If the following modules do not work:
• Remote Keyless Entry System
• Body Control Module
• Door lock switches
A blown fuse is the probable cause. The Body Con-
trol Module (BCM) battery feed fuse are located in
the Power Distribution Center (PDC). Check fuses 4,
15 and 18 in the PDC and fuses 4, 5 and 9 in the
Junction Block.
Key fob transmitter will not lock or unlock
doors.
(1) Check that the BCM has power and ground.
(2) If the RKE still doesn't function. Check the key
fob transmitter batteries for 3 Volts each. If less than
3 Volts, replace the battery.
(3) If the system still does not work, replace the
key fob transmitter. Refer to Programing Remote
Keyless Entry key fob Transmitter.
All doors will not unlock with the key fob
transmitter.
(1) Using a voltmeter, check Pin 4 of the BCM 20
Pin connector for a voltage pulse (Fig. 3). Press the
lock button once.
(2) If no voltage pulse, replace RKE module. If
voltage is measured, repair the harness between the
BCM and the driver door latch.
(3) Check Pins 1, 2 and 3 of the BCM 20 Pin con-
nector for quick voltage pulse when the lock button is
pressed.
(4) If no voltage pulse is measured at Pin 1, 2
and/or 3 replace the BCM. Repair the harness
between terminal and lock latch.
Fig. 3 BCM 20-Way Connector
Driver door will NOT unlock with the key fob
transmitter, but passenger door will unlock.
(1) Using a voltmeter, check Pin 4 of the BCM 20
Pin connector for a voltage pulse (Fig. 3). Depress the
lock button, the voltmeter should read battery volt-
age for approximately 1 second.
(2) If no voltage pulse is measured, replace the
BCM. If voltage is measured repair harness from
BCM to the driver door latch.
Driver door will unlock with the key fob
transmitter, but passenger door will not lock.
(1) Using a voltmeter, check Pin 1, 2 and 3 of the
BCM 20 Pin connector for a voltage pulse (Fig. 3).
Press the lock button.
(2) If no voltage pulse is measured, replace the
BCM. If voltage is measured, repair the harness to
the door latch.
Doors do not lock with the key fob
transmitter.
(1) Using a voltmeter, check Pins 10, 11, 12 and 13
of the BCM 20 Pin connector for a voltage pulse (Fig.
3). Press the lock button on the transmitter. Wait for
quick voltage pulse. It may be necessary to press the
key fob transmitter several times. The voltage pulse
only appears for milliseconds.
(2) If no voltage pulse is measured, replace BCM.
If a voltage is measured, repair the Junction Block as
necessary.
Doors will lock with the key fob transmitter
but there is no horn CHIRP.
(1) Press horn button, listen horn sound.
(2) If the horn does not CHIRP, check if horn is
disabled with the scan tool (DRB). Then check the
horn relay and the horn(s). Repair as necessary.
(3) Using a voltmeter, check horn relay for voltage
pulse (Fig. 3). Press the lock button on the key fob
transmitter.
(4) If no voltage pulse measured, replace the BCM.
If voltage is measured, repair harness to the horn
relay.
Unable to program BCM with a new key fob
transmitter, door locks will not cycle.
Refer to the proper Body Diagnostic Procedure
Manual.
Unable to program BCM with a new key fob
transmitter, door locks cycle. The locks will
not cycle when the transmitter button is
depressed.
Refer to the proper Body Diagnostic Procedure
Manual.
JX