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TM 9-2320-360-20-3
Section 5
DIAGNOSTIC DATA READER INFORMATION (Cont’d)
B. DIAGNOSTIC CODES
The Diagnostic Code Menu Selections are defined as follows:
- Active Codes
- Inactive Codes
- Clear Codes
- Change Code Description
MID Descriptions
MID: 128 ENGINE
Single ECM applications
Diagnostic Codes with Subsystem Identification Characters (SIDs) reference DDEC Ill Auxiliary Output #‘s 1 - 8 (SIDs: 26)
and use the looked-up parameter text description in TABLE 2 page H-278 to identify the function assigned to the auxiliary
output channel.
Injector Response Time Codes Long and Injector Response Time Codes Short will use (TABLE 5 Injector Numbering) page
H-279 to identify the appropriate engine cylinder number.
B.1 ACTIVE CODES
Active Codes are conditions that are presently occurring and causing the Check Engine Light (CEL) to be illuminated. The
display for each code is as follows:
Line 1: MID:XXX ENGINE XX
Line 2: PID Description
Line 3: FMI Description
NOTES:
(1) MID: Message Identification Character
(2) PID: Parameter Identification Character
(3) FMI: Failure Mode ldentifer
(4) A##: Numerical Count of Active Codes
(5) Indicates additional codes are stored in ECM memory
H-263
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