General Diagnostic Notes

DIAGNOSIS:
To accurately diagnose the computer command ride (CCR) system, the CCR Diagnostic System Check must be performed before proceeding with any other testing. The CCR Diagnostic System Check outlines a code reading method that does not require disassembly. Another diagnostic trouble code reading method requires grounding the data link connector DLC terminal C or the CCR controller's F2 terminal and observing the fault indicator on the CCR controller. No matter which method is chosen. the sequence starts with a second lamp off period. Then, code 12 is displayed three times to mark the beginning of the sequence. Next, each stored diagnostic trouble code is blinked out in ascending order. Each diagnostic trouble code is displayed three times before proceeding to the next diagnostic trouble code. If the ground remains applied to the data link connector DLC or the CCR controller, the entire error code sequence repeats and starts by displaying code 12 three times. if at any time the ground is removed, the sequence is aborted.

CLEARING DIAGNOSTIC TROUBLE CODES:
To clear diagnostic trouble codes, connect one end of a Jumper to pin A of the data link connector DLC. With the opposite end of the Jumper, alternately plug into and remove from pin C. Do this three times. Hold each connection for 1 second, and pause 1 second between connections.

NOTE: Once the data link connector DLC circuit has cleared diagnostic trouble codes, it turns off the fault indicator for 1 second, and then turns on the fault indicator for 2 seconds. If the fault indicator does not go out, then the diagnostic trouble codes have not been cleared successfully. Repeat the clearing sequence.

CONTINUOUS STRUT CYCLING:
Grounding data link connector DLC terminal C through a 6.6K ohm resistor causes the system to enter a continuous cycling mode. The CCR controller continuously cycles the actuators from comfort to sport to normal to comfort, at the rate of one change every 2 seconds, and checks for errors. if a fault exists with a strut, that strut does not cycle until a retest is performed. If the fault has cleared prior to the 3 minute retest, the strut cycles when the retest is complete.

STRUT CONNECTORS:
To maintain the connector's sealing integrity, strut connectors should be disconnected from the strut only when necessary. When strut connectors are removed for service or diagnosis, before reconnecting. be certain that:

^ The connector cavity in the strut is clean and dry.
^ The connector alignment groove is properly aligned with the strut.