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Page Title:
S21 1 - TOO FEW SRS (MISSING SRS) (cont) |
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 TM 9-2320-364-20-1
Section IV. TROUBLESHOOTING CHARTS (Cont.)
E. FLASH CODE:
42
J1587 CODE:
S21 1 - TOO FEW SRS (MISSING SRS)
STEP/SEQUENCE
RESULT
WHAT TO DO NEXT
42-5
Check TRS/SRS Gap
Turn camshaft counterclockwise
Incorrect gap.
Loosen the screw at top of
until TRS is over a TRS "tooth"
TRS/SRS mounting bracket.
of pulse wheel.
(Don't touch the two screws that
Tap the front of camshaft
go into block front end plate
rearward with a soft hammer (to
-they will affect engine timing.)
remove camshaft end play).
Adjust the TRS/SRS until gap
Using a feeler gauge check gap
setting is correct. Tighten screw.
between the pulse wheel teeth
(If problem returns, pulse wheel
and TRS (nominal gap 0.020"
may be loose or bad, notify
or 0.5 mm).
supervisor). Then go to 42-30.
Gap setting is correct.
Go to 42-6.
42-6
Check for TRS Code
Was there also a Code 21/0?
Yes.
Go to 42-8.
No.
Go to 42-7.
42-7
Check ECM Connectors
Check terminals at engine
Terminals and
Then go to 42-15.
harness connector (both ECM
connectors are okay.
and harness side) for damage,
corrosion, and unseated pins or
Problem found.
Repair terminals/connectors
sockets.
(para 7-101). Then go to 42-30.
42-8
TRS Resistance Check
Read resistance between sockets
Less than or
Go to 42-9.
T1 and T2 on engine harness
equal to 200 ohms.
connector.
Greater than
Go to 42-10.
200 ohms or open.
2-707
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