TE S T ACTION AP PLICAB ILITY
10 Tur n th e ign it ion off.
Discon n ect t he MAF Sen sor h a r n ess con n ect or.
Tur n th e ign it ion on .
Mea su r e th e volt a ge bet ween t he 5-volt Su pply cir cu it a n d th e Sen sor Grou n d cir cu it
at t h e MAF Sen sor ha r n ess conn ect or.
Is t h e volt a ge above 4.5 volt s?
All
Ye s → Go To 11
No → Repla ce a n d progr a m t h e E CM in a ccor da n ce wit h t h e Ser vice
In for m a t ion .
Per for m ROAD TE ST VE RIF ICATION - VER-2.
11 Tur n th e ign it ion off.
Discon n ect t he MAF Sen sor h a r n ess con n ect or.
Tur n th e ign it ion on .
Usin g a 12-volt t est ligh t con n ect ed t o grou n d, pr obe th e 12 Volt Supply cir cuit in t h e
MAF Sensor h ar n ess con n ector
Does t h e test ligh t illu min a t e br igh t ly?
All
Ye s → Repla ce th e MAF Sen sor.
Per for m ROAD TE ST VE RIF ICATION - VER-2.
No → Repa ir th e 12 Volt Su pply cir cu it for an open .
Per for m ROAD TE ST VE RIF ICATION - VER-2.
12 Tur n th e ign it ion off.
Discon n ect t he MAF Sen sor h a r 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 5 Volt Su pply cir cu it .
Is t h e resista n ce below 10.0 ohm s?
All
Ye s → Go To 13
No → Repa ir th e MAF Sen sor 5 Volt Su pply cir cu it for a n open .
Per for m ROAD TE ST VE RIF ICATION - VER-2.
13 Tur n th e ign it ion off.
Discon n ect t he MAF Sen sor h a r 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 t h e resist a n ce bet ween t h e MAF Sen sor 5 Volt Su pply cir cuit a n d t h e Sen sor
Gr ou n d cir cu it at t he MAF Sen sor h a r n ess con n ect or.
Is t h e resista n ce a bove 1000 ohm s?
All
Ye s → Go To 14
No → Repa ir t h e MAF 5 Volt Su pply cir cu it for a sh or t t o t h e Sen sor
Gr ou n d cir cu it.
Per for m ROAD TE ST VE RIF ICATION - VER-2.
14 Tur n th e ign it ion off.
Discon n ect t he MAF Sen sor h a r 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 resist a nce bet ween gr ou n d a n d t h e MAF Sensor 5 Volt Su pply cir cu it a t
th e MAF ha r n ess con n ect or.
Is t h e resista n ce below 1000 ohm s?
All
Ye s → Repa ir th e MAF Sen sor 5 Volt Su pply cir cu it for a shor t to gr ou n d.
Per for m ROAD TE ST VE RIF ICATION - VER-2.
No → Go To 15
23
DRI V EABI LI T Y - DI ESEL
P 0100-MAS S AIR F LOW S EN SOR S IGN AL VOLTAGE TOO LOW —
Co n t in ued