TM 9-2320-363-20-1
Section 4
TROUBLESHOOTING CHARTS
E. FLASH CODE: 61
J1587 CODE:
S XXX O- INJECTOR RESPONSE TIME LONG
NOTE - This chart is only to be used if:
1)
All basic mechanical checks and physical inspections have been performed with no problem found, and
2)
Diagnosis of DDEC-III was started at step Start-1, pg 3-345.41 and you have now been referred here.
STEP/SEQUENCE
61-1 Determine Cylinder(s) with Fault
Use the chart on page 3-345.366 to
find the Injector location logging the codes
INJECTOR RESPONSE TIME TOO LONG (SAE: Data valid but above normal range)
If one or more codes on one bank of injectors:
CHECK ECM
o
At the ECM disconnect the 5-pin injector harness connector for the injector(s) logging the code(s).
o
Establish a good ECM case ground by measuring the resistance across two points on the ECM. The
resistance should read less than or equal to 1 OHM.
o
Once a good case ground is established, keep one of the measurement proves in place and move the other
probe to one of the five exposed male injector terminals on the ECM and read the resistance. Repeat the
procedures at each of the five terminals.
O
A resistance value of less than 1000 OHMs (1K OHMs) at any terminal indicates a faulty injector driver
circuit. Replace ECM.
NOTE: The injector driver returns (circuit 619/pin G and circuit 620/pin A) will have a resistance reading
above 100,000 OHMs (100 K OHMs) on a good ECM.
The remaining injector drive circuits will have resistance reading above 1,000,000 OHMs (1 M OHMs) on a good
ECM.
Change 3 3-345.365
