STEP/SEQUENCE
RESULT
WHAT TO DO NEXT
TM 9-2320-363-20-1
Section 4
TROUBLESHOOTING CHARTS
E.
FLASH CODE:
42
J1587 CODE:
S21 1 - TOO FEW SRS (MISSING SRS)
42-9
Check for Short
Disconnect TRS connector.
Less than or
Signal line (ckt #110) is shorted
Read resistance between sockets
equal to 10,000 ohms.
to return line (ckt #109). Repair
T1 and T2 on engine harness
short. Then go to 42-30.
connector.
Greater than
Go to 42-11.
10,000 ohms or open.
42-10
Open TRS Line Check
Install a jumper wire between
Less than or
Go to 42-11.
sockets A and B of TRS
equal to 5 ohms.
harness connectors.
Read resistance between sockets
Greater than
Signal line (ckt #110) or return
T1 and T2 of engine harness
5 ohms or open.
line (ckt #109) is open. Repair
connector.
open. Then go to 42-30.
42-11
TRS Test
Read resistance of Timing
Less than or
Go to 42-13.
Reference Sensor across
100 ohms.
sensor connector pins A and B.
From 100 to 200 ohms.
Go to 42-7.
Greater than 200 ohms
Go to 42-13.
42-12
Check SRS Connectors
Check connectors at SRS (both
Connectors
Replace SRS. Then go to 42-14.
harness side and SRS side)
are okay.
for corrosion, damaged or
unseated pins or sockets, or bad
Problem found.
Repair terminals/connectors.
contacts.
Then go to 42-30.
Change 3 3-345.327
