Table of Contents
Advertisement
JA
DIAGNOSIS AND TESTING
DIAGNOSTIC CONDITIONS
Refer to (Fig. 2) for internal BCM relay configuration.
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.
Fig. 2 Internal BCM Lock/Unlock Relay Configuration
POWER LOCK SYSTEMS
(2) If the RKE still doesn't function. Check the key
fob transmitter battery(s) for 3 Volts each. If less
than 3 Volts, replace the battery(s).
(3) If the system still does not work, replace the
key fob transmitter. Refer to Programing Remote
Keyless Entry Key Fob Transmitter.
(4) Check country code setting in BCM. Set to U.S.
or Canada.
All doors will not unlock with the key fob
transmitter.
(1) With the driver's door in the unlocked position.
Using a voltmeter, check Pin 4 of the BCM 20 Pin
connector for a voltage pulse (Fig. 3). Press the
unlock button once.
(2) If no voltage pulse, replace BCM. 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 unlock but-
ton is pressed twice within a 5 second interval.
(4) If no voltage pulse is measured at Pin 1, 2,
and/or 3, replace the BCM. If voltage is measured
repair the harness between terminal and door latch.
8P - 5
Advertisement
Chapters
Table of Contents
