TE S T ACTION AP PLICAB ILITY
1 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, er a se E CM DTCs.
Tur n th e ign it ion off for 10 secon ds.
Test drive th e veh icle.
Mon it or th e DRB for ECM DTCs.
Did t h is DTC set a ga in ?
All
Ye s → Go To 2
No → Go To 9
2 Tur n th e ign it ion off.
Usin g th e Ser vice Infor m a t ion wir in g dia gr a m s, inspect t h e wir in g a n d con n ect or s
bet ween th e ECM an d t h e O2 sen sor for da ma ge, corr osion , poor t er m in a l cont a ct or
oth er pr oblems.
Wer e an y pr oblem s fou n d?
All
Ye s → Clea n, r epa ir or repla ce as n ecessa r y.
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 O2 Sen sor h a r ness con n ect or.
Tur n th e ign it ion on .
Usin g a 12-volt t est ligh t conn ect ed to grou n d, check t h e P ower Su pply cir cu it at th e
O2 h a r ness con n ect or cavit y 4.
Does t h e test ligh t illu min a t e br igh t ly?
All
Ye s → Go To 4
No → Repa ir th e P ower Su pply circu it for an open or sh or t t o gr ou n d.
Per for m ROAD TE ST VE RIF ICATION - VER-2.
4 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.
Per for m t h e followin g r esist a nce m ea su r emen t s from t h e O2 h a r n ess conn ect or t o t h e
ECM h a rn ess con n ect or.
O2 Sen sor Ca vit y 1 to E CM Ca vit y C1-15.
O2 Sen sor Ca vit y 2 to E CM Ca vit y C1-40.
O2 Sen sor Ca vit y 3 to E CM Ca vit y C1-72.
O2 Sen sor Ca vit y 5 to E CM Ca vit y C1-62.
O2 Sen sor Ca vit y 6 to E CM Ca vit y C1-39.
Is t h e resista n ce below 10.0 ohm s for ea ch mea su rem en t ?
All
Ye s → Go To 5
No → Repa ir t h e cir cuit (s) th a t m ea su r ed a bove 10.0 ohm s for an open .
Per for m ROAD TE ST VE RIF ICATION - VER-2.
135
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