Chapter 12 – Apollo ECU Information
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12.2. Apollo ECU error codes
12.2.1. Error levels
There are three different severity levels for errors and faults.
Severity
level
Description
Error/fault All control output will be stopped. Relays will turn off and actuators
will power down.
Warning Control output will continue for subsystems not affected by the fault.
For example, if a sensor power supply experiences over current, the
relays will not power down.
Information Control output is not affected.
12.2.2. Error code signature
The error codes displayed in Sunrise or on the Universal Terminal will
have the following signature:
IOGGPPDDEE
The meaning of each pair of digits is covered in the following sections.
Note: This is a hexadecimal number, base 16 arithmetic should be
used.
12.2.3. CM-40 ECU error codes
EE - ECU error state
These two digits give an indication of which ECU subsystems have
high severity errors/faults.
The specific error(s) in each subsystem, specified by EE, can be found
by decoding the preceding digits (IOGGPPDD).
Not all high severity errors are included in the preceding digits, in this
case faulty subsystems are only identified. IOGGPPDD can be zero (not
displayed) in this case and only EE will have a value.
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