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Page Title: CODE 42 SYNCHRONOUS REFERENCE SENSOR (SRS) (CONT).
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TM 9-2320-364-20-1
A4 CODE 42 SYNCHRONOUS REFERENCE SENSOR (SRS) (CONT).
2.
KNOWN INFO
TEST OPTIONS
WARNING
Read WARNING
CHECK ENGINE light (CEL)
STE/ICE-R #91.
comes ON and stays ON.
Are there
REASON FOR QUESTION
POSSIBLE PROBLEMS
between 100 and 200 ohms
Resistance less than 100 ohms
measured between wires 112
DDEC ECM and/or engine
or more than 200 ohms at
and 111 at engine harness
harness connector faulty.
DDEC ECM engine harness
DDEC ECM faulty.
connector, terminals S1
connector indicates SRS
Wires 112 and/or 111 are
and S2?
sensor or wiring faulty.
shorted.
Wires 112 and/or 111 are open.
SRS and/or engine harness
connector faulty.
For 100 ohms or less,
SRS faulty.
go to Step 4 of this
NO
Fault. For more than
200 ohms, go to Step
5 of this Fault.
YES
3.
KNOWN INFO
TEST OPTIONS
CAUTION
Read CAUTION
CHECK ENGINE light (CEL)
Visual inspection.
comes ON and stays ON.
REASON FOR QUESTION
POSSIBLE PROBLEMS
Are DDEC ECM terminals and
Damage to terminals or
connectors (DDEC ECM and
connectors can affect signal to
DDEC ECM and/or engine
engine harness side) free
DDEC ECM.
harness connector faulty.
from damage?
DDEC ECM faulty.
Wires 112 and/or 111 are
shorted.
Wires 112 and/or 111 are open.
SRS and/or engine harness
Repair engine
connector faulty.
harness connector
SRS faulty.
(Para 7-101) or
NO
replace DDEC ECM
(Para 7-56).
Verify repair, go to
Step 7 of this Fault.
YES
Replace DDEC ECM
(Para 7-56).
Verify repair, go to
Step 7 of this Fault.
2-324

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