Symptom:
*NO RESP ON S E F ROM ENGIN E CON TROL MOD ULE
POSSIBLE CAUSES
CH E CK P OWERS AND GROUN DS TO THE E N GINE CONTROL MODULE
K-E CM CIRCUIT SH ORTE D TO GROUND
K-E CM CIRCUIT SH ORTE D TO VOLTAGE
K-E CM CIRCUIT OP EN
ENGINE CONTROL MODULE
TE S T ACTION AP PLICAB ILITY
1 Tur n th e ign it ion off.
Discon n ect t he E n gin e Con t r ol Modu le ha r n ess conn ect or s.
Ch eck ea ch power a n d gr ou n d cir cu it to th e modu le.
Wer e an y pr oblem s fou n d?
All
Ye s → Refer to th e wir in g dia gr a m s loca t ed in t h e ser vice in for m a t ion t o
help isola t e an open or sh or t ed con dit ion . Repa ir as n ecessa r y.
Per for m ROAD TE ST VE RIF ICATION - VER-2.
No → Go To 2
2 Tur n th e ign it ion off.
Discon n ect t he E CM ha r n ess con n ect or s.
Discon n ect t he DRBIII" from t h e DLC.
Mea su r e th e resista n ce between gr ou n d a n d t h e K-E CM cir cu it .
Is t h e resista n ce below 5.0 ohm s?
All
Ye s → Repa ir t h e K-E CM cir cu it for a sh or t to gr ou nd.
Per for m ROAD TE ST VE RIF ICATION - VER-2.
No → Go To 3
3 Tur n th e ign it ion off.
Discon n ect t he DRBIII" from t h e DLC.
Discon n ect t he E CM ha r n ess con n ect or s.
Tur n th e ign it ion on .
Usin g a 12-volt test ligh t con n ect ed t o gr ou nd, probe t h e K-E CM cir cu it .
NOTE: Th e t e s t lig h t m u s t illu m in a t e b rig h tly. Co m p are th e brig h tn e ss to
th a t of a dire c t co n n e cti o n to th e ba tte ry.
Does t h e test ligh t illu min a t e br igh t ly?
All
Ye s → Repa ir t h e K-E CM cir cu it for a sh or t to volt a ge.
Per for m ROAD TE ST VE RIF ICATION - VER-2.
No → Go To 4
112
COM M U N I CAT I ON
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