6E1-16
ENGINE AND EMISSION CONTROL SYSTEM
A-2 MALFUNCTION INDICATOR LAMP CIRCUIT CHECK
(MALFUNCTION INDICATOR LAMP FLASHES AT IGNITION SWITCH ON.)
1. Battery positive voltage
2. Blank
3. Ignition switch
4. Fuse
5. Malfunction indicator lamp
6. Monitor connector
7. ECM
8. Main relay
STEP
ACTION
YES
NO
1
MIL Flashing Pattern Check
1) Turn ignition switch ON.
Does lamp flashing pattern indicate diagnostic trouble
code?
Go to Step 2.
Substitute a known-good
ECM and recheck.
2
Diag. Switch Circuit Check
Is diag. switch terminal connected to ground via ser-
vice wire?
System is in good
condition.
“V/G” circuit shorted to
ground. If circuit is OK,
substitute a known-good
ECM and recheck.