Cim Diagnostic Leds B3 - B0; Table 13 - Cim Diagnostic Led Codes - Keyscan CA250B Technical Instructions

CIM Diagnostic LEDs B3 – B0
The CIM unit has on-board diagnostic LEDS - B3 to B0 - designed to assist in troubleshooting communication
difficulties.
 diagnostic LEDs during boot-up - initial power or Reset J1
 data LEDs during operation are TX – transmit
Diagnostic Guidelines
LEDs B3 – B0 indicate TX data transmission states. Diagnostic Jumper J2 - sets the CIM board to run in
diagnostic mode.
CIM Diagnostics – LED Codes
The following table lists diagnostic LED codes on the CIM. LED indicators are as follows:
 0 = OFF
 1 = ON
Place a jumper on J2 to run the CIM in diagnostic mode.
LED
B3 B2 B1
0 0 0
0 0 0
0 0 1
0 0 1
0 1 0
0 1 0
0 1 1
0 1 1
1 0 0
1 0 0
Note
Diagnostic mode indicated by all four (4) LEDs flashing three (3) times. Diagnostic codes are displayed
every 20 seconds. Multiple codes are displayed lowest to highest.
End of diagnostics routine is indicated when all four (4) LEDs flash three (3) times.
Unless Power Good/Fault LED is flashing, the unit will not enter unit diagnostics mode even if a jumper is
on J2.
Keyscan Inc. – Technical Guide (PC109x - 04.15)
Table 13 – CIM Diagnostic LED Codes
Trouble
Indication
Code
B0
0 0
1 1
0 2
1 3
0 4
1 5
0 6
1 7
0 8
1 9
Fault
None
+ 5V logic voltage low
+ 12V input voltage low
+ 5V isolated logic supply low
CAN Bus 1 fault
Global broadcast fail
ACU panel initialize fail
CAN Bus 2 fault
CIM to ACU auto-match bit rate fail or incomplete
Data carrier detect (DCD) connection lost. Applies to reverse
network communication mode only.
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