DIAGNOSTIC CODES -726280852

TM 9-2320-364-20-1

2-14. DDEC III/IV TROUBLESHOOTING (CONT).

Section V. DIAGNOSTIC DATA READER INFORMATION (Cont.)

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 III/IV Auxiliary Output #'s 1 -- 8 (SIDs: 26)

and use the looked-up parameter text description in TABLE 2-22 page 2-798 to identify the function assigned to the auxiliary

output channel.

Injector Response Time Codes Long and Injector Response Time Codes Short will use TABLE 2-25 (Injector Numbering)

page 2-799 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

Line 4:

↑A## PID:XXX FMI:XX↓

NOTES:

(1)

MID: Message Identification Character

(2)

PID: Parameter Identification Character

(3)

FMI: Failure Mode Identifer

(4)

A##: Numerical Count of Active Codes

(5)

↑↓: Indicates additional codes are stored in ECM memory