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Section 4
TROUBLESHOOTING CHARTS
TM9-2320-360-20-3
FLASH CODE:
DDR DISPLAY
SAE J1587 CODE:
56
J1587 DATA LINK FAILURE
SID: 250 FMI: 12
Indicates that the J1587 (diagnostic) data link is no longer allowing the ECM to transmit data. This diagnostic
condition is typically:
(1)
(2)
either or both of the data link circuits are open at some point in the network
either or both of the data link circuits are shorted to ground at some point in the network
(3)
(4)
either or both of the data link circuits are shorted to battery (t) at some point in the network
the pair of data link circuits are shorted together
FLASH CODE:
57
DDR DISPLAY
J1922 DATA LINK FAILURE
SAE J1587 CODE:
SID: 249 FMI: 12
Indicates that the J1922 (Low Speed Powertrain) data link is no longer allowing the ECM to transmit data. This
diagnostic condition is typically:
(1) either or both of the data link circuits are open at some point in the network
(2) either or both of the data link circuits are shorted to ground at some point in the network
(3)
either or both of the data link circuits are shorted to battery (+) at some point in the network
(4)
the pair of data link circuits are shorted together
FLASH CODE:
61
DDR DISPLAY
XXX INJECTOR RESPONSE TIME LONG
SAE J1587 CODE:
SID: XX FMI: 0
Indicates that the time it takes from when the DDEC III ECM requests an injector be turned on to when the injec-
tor solenoid valve actually closes is longer than the high limit of the expected range. This diagnostic condition is
typically:
(1)
bad injector harness/connection (high resistance)
(2)
(3)
blown fuses in the ECM battery (+) voltage supply harness
sticky solenoid valve
NOTE: The injector diagnostic SID (Subsystem Identifier) indicates which cylinder number has an injector with a
long response time. The injector number describes the cylinder and/or bank which has the injector with a
long response time. The troubleshooting chart for this flash code is covered in TM 9-2320-360-34-1.
Injector response times generally increase with low battery supply voltage and decrease with high battery
supply voltage. Although injector response times vary from injector to injector at a given RPM, each indi-
vidual injector response time should remain relatively consistent from one firing to the next. Wide varia-
tions in response time (typically +/- 0.2 msec) for one injector at a steady engine RPM may indicate an
electrical problem (faulty alternator or voltage regulator, poor or broken ground cables, etc.).
FLASH CODE:
62
DDR DISPLAY
(AUXILIARY OUTPUT #1) SHORT TO BATTERY (+)
SAE J1587 CODE:
SID: 026 FMI: 3
Indicates that the function (engine brake) assigned to the Auxiliary Output #1 circuit output Is shorted to battery
(+). This diagnostic condition is detected when the DDEC Ill ECM is unsuccessful in turning ON the configurable
function.
NOTE: The DDR will display the parameter text description in TABLE 2 (ECM Output Options) to identify the
function assigned to AUXILIARY OUTPUT #1.
The DDEC III ECM supplies a switched ground to the AUXILIARY OUTPUT #1 circuit to turn ON the
function assigned.
H-21
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