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Page Title:
CRANE HIGH IDLE NOT WORKING (CONT). |
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 TM 9-2320-364-20-1
D4 CRANE HIGH IDLE NOT WORKING (CONT).
4.
KNOWN INFO
TEST OPTIONS
WARNING
Read WARNING
Para 2-43, Fault 19
Visual inspection.
on Page 2-463
Troubleshooting completed.
Throttle position sensor OK.
REASON FOR QUESTION
DDEC ECM is reading vernier
Are DDEC ECM terminals and
control.
Damage to terminals or
vehicle harness connector
connectors can affect signal to
MC18 (DDEC ECM and
POSSIBLE PROBLEMS
DDEC ECM.
harness side) free from
DDEC ECM faulty.
damage?
Damaged DDEC ECM terminals
or connectors.
Repair vehicle
harness connector
MC18 (Para 7-101) or
NO
replace DDEC ECM
(Para 7-56).
Verify repair, go to
Step 11 of this Fault.
YES
Replace DDEC ECM
(Para 7-56).
Verify repair, go to
Step 11 of this Fault.
5.
KNOWN INFO
TEST OPTIONS
CAUTION
Read CAUTION
Are less
Para 2-43, Fault 19
Resistance test.
on Page 2-463
than 5 ohms
Troubleshooting completed.
STE/ICE-R #91.
measured
Throttle position sensor OK.
between wires
DDEC ECM is reading vernier
REASON FOR QUESTION
510/1525 and 952 at vehicle
control.
harness connector MC18,
DDEC ECM terminals and
Resistance more than 5 ohms
terminals D1 and C3 with
connectors OK.
at vehicle harness connector
jumperwire installed at
DDEC ECM OK.
indicates signal line
vernier control connector
wire 1525 or 510, ground line
MC38, terminals A and B?
POSSIBLE PROBLEMS
wire 952 are open.
Open in signal or ground
Repair wires 510,
wire 510/1525 or 952.
1525 and/or 952 (see
Open in +5 volt wire 916.
schematic Fig 2-1)
Short in signal or ground
NO
or notify DS
wire 510/1525 or 952.
Maintenance.
Short in +5 volt wire 916.
Verify repair, go to
Damaged vernier control
Step 11 of this Fault.
terminals or connectors.
Vernier control faulty.
YES
2-462
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