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Page Title:
S21 0 - TOO MANY SRS (MISSING TRS) |
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 TM 9-2320-364-20-1
Section IV. TROUBLESHOOTING CHARTS (Cont.)
E. FLASH CODE:
41
J1587 CODE:
S21 0 - TOO MANY SRS (MISSING TRS)
STEP/SEQUENCE
RESULT
WHAT TO DO NEXT
41-5
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" or
may be loose or bad, notify
0.5 mm).
supervisor). Then go to 41-30.
Gap setting is correct.
Go to 41-6.
41-6
Check for SRS Code
Was there also a Code 21/1?
Yes.
Go to 41-8.
No.
Go to 41-15.
41-7
Check ECM Connectors
Check terminals at engine
Terminals and
Replace ECM (para 7-57).
harness connector (both ECM
connectors are okay.
Then go to 41-30.
and harness side) for damage,
corrosion, and unseated pins or
Problem found.
Repair terminals/connectors
sockets.
(para 7-101). Then go to 41-30.
41-8
SRS Resistance Check
Read resistance between sockets
Less than or
Go to 41-9.
S1 and S2 on engine harness
equal to 200 ohms.
connector.
Greater than
Go to 41-10.
200 ohms or open.
2-697
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