ENGINE AND EMISSION CONTROL SYSTEM
6E1-15
A-1 MALFUNCTION INDICATOR LAMP CIRCUIT CHECK
(MALFUNCTION INDICATOR LAMP DOES NOT LIGHT 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
Test switch terminal circuit check:
1) With the ignition switch ON position, check
voltage between E34-7 terminal of ECM
coupler and ground.
Is voltage 4-5V?
Go to Step 2.
“P/W” wire (test switch terminal)
shorted to ground circuit.
If OK, substitute a known good
ECM and recheck.
2
MIL bulb and circuit check:
1) Using service wire, ground E32-317 termi-
nal of ECM coupler.
Does MIL turn ON at ignition ON position?
Go to TABLE A-4.
MIL bulb burned out.
“IG-COIL METER” fuse(s)
blown.
Ignition switch malfunction.
“V/Y” wire open.
“B/W” wire open.
Fig. for STEP 1
1. ECM coupler disconnected
2. Body ground
3. Service wire
Fig. for STEP 2
1. “IG-COIL METER” fuse