TE S T ACTION AP PLICAB ILITY
1 NOTE: If m u lt ip le D TCs are p re se n t, th e m o st lik e ly c a u se is a 5-Volt Su p p ly
or Sensor Ground circuit shorted to voltage or ground. Refer to the Service
In fo r m a t io n Wi ri n g s ec t i o n fo r c i rc ui ts t h a t w o uld a ffe c t m u l ti p le D TCs .
NOTE: If the ECM detects and stores a DTC, the ECM also stores the
e n gi n e /ve h ic le o p e ra ti n g c o n d i tio n s u n d e r w h ic h th e D TC w a s s e t. S o m e o f
these conditions are displayed on the DRB at the same time the DTC is
displayed.
NOTE: Before erasing stored DTCs, record these conditions. Attempting to
duplicate these conditions may assist when checking for an active DTC.
Tur n th e ign it ion on .
Wit h th e DRB, m on it or t h e E n gin e Coola n t Tem per a t u r e (ECT) Sen sor volt a ge.
Is t h e ECT Sen sor volt age above 4.90 volt s?
All
Ye s → Go To 2
No → Go To 7
2 Tur n th e ign it ion off.
Discon n ect t he E CT Sensor h ar n ess con n ect or.
Tur n th e ign it ion on .
Mea su r e th e volt a ge on th e ECT Sen sor Sign a l cir cu it .
Is t h e volt a ge above 5.5 volt s?
All
Ye s → Repa ir t h e E CT Sen sor Sign a l 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 3
3 Tur n th e ign it ion off.
Discon n ect t he E CT Sensor h ar n ess con n ect or.
Con n ect a ju m per wir e bet ween t he E CT Sensor h ar n ess con n ector ca vities.
Tur n th e ign it ion on .
Wit h th e DRB, r ea d t h e ECT Sen sor volt a ge.
Is t h e volt a ge below 1.0 volt ?
All
Ye s → Repla ce t h e ECT Sen sor in a ccor da n ce wit h t he Ser vice In for m a -
tion .
Per for m ROAD TE ST VE RIF ICATION - VER-2.
No → Go To 4
4 Tur n th e ign it ion off.
Discon n ect t he E CT Sensor h ar n ess con n ect or.
Discon n ect t he E CM ha r n ess con n ect or s.
Mea su r e th e resista n ce of t h e ECT Sen sor Gr ou n d cir cu it .
Is t h e resista n ce below 10.0 ohm s?
All
Ye s → Go To 5
No → Repa ir th e E CT Sen sor Gr ou n d cir cu it for an open .
Per for m ROAD TE ST VE RIF ICATION - VER-2.
5 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 E CT Sensor h ar n ess con n ect or.
Mea su r e th e resista n ce of t h e ECT Sen sor Sign a l cir cu it .
Is t h e resista n ce below 10.0 ohm s?
All
Ye s → Go To 6
No → Repa ir th e E CT Sen sor Sign a l circu it for an open .
Per for m ROAD TE ST VE RIF ICATION - VER-2.
45
DRI V EABI LI T Y - DI ESEL
P 0115-ENGIN E COOLAN T TEMP S ENS OR CIRCU IT S IGN AL VOLTAGE
TOO H IGH —
Co n t in ued