Cec System (Six-Cylinder Engine); Diagnostic Test; Operational Test - Jeep 1987 Wrangler Workshop Manual

ENGINES
FUEL FEEDBACK SYSTEMS
C E C S Y S T E M (SIX-CYLINDER ENGINE)
DIAGNOSTIC TEST 1 OPERATIONAL TEST
T U R N IGNITION S W I T C H O N AND S T A R T E N G I N E E N G I N E
S H O U L D B E S T A R T E D
NO Y E S
WITH THE IGNITION SWITCH OFF.
DISCONNECT HARNESS AT MCU T E S T
BETWEEN MCU CONNECTOR PIN 59 AND
DISTRIBUTOR - (ORANGE WIRE) AT
DISTRIBUTOR FOR CONTINUITY
PROCEED TO INITIALIZATION TEST.
DIAGNOSTIC TEST 2
NO
\
R E P A I R O P E N W I R E AND
R E T E S T
Y E S
T E S T MCU CONNECTOR PIN 18 AND
DISTRIBUTOR - (VIOLET WIRE) AT
DISTRIBUTOR FOR CONTINUITY
NO Y E S
REPAIR OPEN WIRE AND
RETEST
TEST MCU CONNECTOR PIN 47 AND
ORANGE WIRE OF IGNITION MODULE FOR
CONTINUITY.
12
A
K \ NO
T E S T MCU CONNECTOR PIN 20
AND ENGINE GROUND FOR
CONTINUITY. C H E C K HARNESS
GROUND FOR TIGHT
CONNECTION AT RIGHT SIDE O F
CYLINDER BLOCK
REPAIR OPEN WIRE AND
RETEST
C O N T ' D
83085AU)
B-270