NST13165-2_A 2019-02-12
Page 6
TROUBLESHOOTING
SYMPTOM - KEYLESS ENTRY
DOOR DOES NOT UNLOCK
ANTENNA / READER
1 Door Does Not Unlock When a Keychain Tag is Swiped
POSSIBLE CAUSE
CORRECTIVE ACTION
1.1.3
Enroll new Keychain Tag - See Code Enrollment
section. (Page 2)
1.1
Keychain Tag is not enrolled correctly
Note: Door unlocks when unlock
switch is pressed.
1.2
The Keychain Tag is damaged or
defective
1.2.1
If the door will unlock using the switch, but
will not unlock with the Keychain Tag, then
the Keychain Tag is defective. Replace the
Keychain Tag and enroll it. See Code
Enrollment section (Page 2).
1.3
The Antenna/Reader RFID circuit has
failed
1.4
Wire Harness, crimp, ground
connection or solenoid had failed
1.3.1
Unplug the Antenna/Reader from the
wire harness and recoonnect it. Obseve
the Mod-QC Test. First, the location code
will be flashed. Second, the data
bus operation is tested. Third, both LEDs will turn on
solid for 15-seconds to check the Antenna/Reader
RFID circuit. Present a Keychain Tag. If the Keychain
Tag is detected, both LEDs turn off and back on; the
Antenna/Reader RFID circuit is OK. If the Tag is not
detected, the RFID circuit is failed. Replace the
Antenna/Reader.
1.4.1
If the red LED flashes when swiped
with the Keychain Tag or the Unlock
switch is pressed, but the door does
not unlock, check the truck harness
and connector. The solenoid output
voltage on pin #3 (gray wire) should
be +12V any time the green LED is on for 6-seconds.
If +12V is present on pin #3 (gray wire), check the
truck wire harness and the ground and solenoid
connections. Repair as needed.
1.1.1
Swipe Antenna/Reader with Keychain
Tag - Does red LED on Antenna/Reader
flash twice? If yes, Keychain Tag is
enrolled correctly.
1.1.2
If no, press the unlock switch to verify the
Antenna/Reader and solenoid are operating correctly.
The red LED should flash once when the unlock switch
is pressed and the door should unlock.
Antenna/Reader
Connector
Pigtail
