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Section 4
TM9-2320-360-20-3
TROUBLESHOOTING CHARTS
D. CHART -5 - “CHECK ENGINE” LIGHT ON AND NO ACTIVE CODE ON DDR (Cont’d)
STEP/SEQUENCE
RESULT
WHAT TO DO NEXT
C 5-5
Check ECM
Connectors
l Turn ignition off.
l Check terminals at vehicle
harness connectors (both ECM
and harness side) for damage;
bent, corroded and unseated pins
or sockets.
l Check terminals in connector to
be sure B1 is wire #419 and B3
is wire #439.
C 5-30
Verify Repairs
l Turn ignition off.
l Reconnect all connectors.
l Turn ignition on.
l Clear codes.
l Turn ignition off.
l Turn ignition on while at same
time observing “Check Engine”
light.
l If ‘Check Engine” light stays on,
read inactive code.
are okay.
Replace ECM (para 7-29.1).
Then to go C5-30.
Problem found.
Repair terminals/connectors
(para 7-77). Then go to C5-30.
“Check Engine”
light comes
on for up to
5 seconds,
then goes out.
Repairs are complete.
“Check Engine”
light does not
come on at all.
Go to C4-1.
No active codes and
All system diagnostics are
“Check Engine”
complete. Please review this
light comes on
section from first step to find
and stays on.
the error.
Fault codes
present.
Go to START-1, pg H-25 to
service other codes.
H-73
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