TE S T ACTION AP PLICAB ILITY
5 Tur n th e ign it ion off.
Discon n ect t he O2 Sen sor h a r ness 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 r esist a n ce bet ween gr ou n d a n d O2 Sen sor ha r n ess conn ect or cavit ies 1,
2, 3, 5, a n d 6.
Is t h e resista n ce a bove 1000 ohm s for ea ch mea su rem en t ?
All
Ye s → Go To 6
No → Repa ir t h e cir cu it (s) th a t m ea su red below 1000 oh m s for a sh or t t o
gr ou n d.
Per for m ROAD TE ST VE RIF ICATION - VER-2.
6 Tur n th e ign it ion off.
Discon n ect t he O2 Sen sor h a r ness con n ect or.
Discon n ect t he E CM ha r n ess con n ect or s.
NOTE: The circuits connecting the O2 Sensor and the ECM are single
circuits and do not contain any splices. There should be NO continuity from
one circuit to the other.
Usin g a n oh m m et er, ch eck t h e O2 Sen sor cir cuit s for sh or t s t oget h er (resist a nce
below 1000 ohm s)..
Is t h e resista n ce fr om an y O2 Sen sor ci r cu it to a n ot h er below 1000 ohm s?
All
Ye s → Repa ir t h e cir cu it s th a t m ea su r ed below 1000 oh ms for a sh or t
toget her.
Per for m ROAD TE ST VE RIF ICATION - VER-2.
No → Go To 7
7 Tur n th e ign it ion off.
Discon n ect t he O2 Sen sor h a r ness con n ect or.
Discon n ect t he E CM ha r n ess con n ect or s.
Rem ove t h e E ngin e Con t r ol Rela y.
Con n ect a ju mper wir e bet ween ca vit y 30 a n d ca vit y 87 of t h e En gin e Con t r ol Rela y
conn ect or.
Tur n th e ign it ion on .
Mea su r e th e volt a ge of O2 Sen sor ha r n ess conn ect or ca vit ies 1, 2, 3, 5, a n d 6.
Is t h e volt a ge below 1.0 volt s for ea ch mea su r em en t?
All
Ye s → Go To 8
No → Repa ir t h e cir cu it (s) th a t m ea su red below 1000 oh m s for a sh or t t o
volt a ge.
Per for m ROAD TE ST VE RIF ICATION - VER-2.
8 Tur n th e ign it ion off.
Repla ce th e O2 Sensor in accor da n ce wit h t h e Service In for m a tion .
Tur n th e ign it ion on .
Wit h th e DRBIII",erasetheECMDTCs.
Test drive th e veh icle.
Wit h th e DRBIII",readtheECMDTCs.
Did t h is DTC set a ga in ?
All
Ye s → Repla ce th e E CM in a ccor da n ce with t h e Ser vice In for m a t ion .
Per for m ROAD TE ST VE RIF ICATION - VER-2.
No → Test Com plet e.
136
DRI V EABI LI T Y - DI ESEL
P 2026-O2 S ENS OR CIRCU IT FAU LT — Co n t i n u ed