TE S T ACTION AP PLICAB ILITY
4 Tur n th e ign it ion on .
Wh ile ba ck pr obin g a n y m odu le ha r n ess con n ector t h a t u ses t h e CAN Bu s, m ea su r e
th e volt a ge between t h e CAN C Bu s (+) circu it an d gr ou n d.
Wh ile ba ck pr obin g a n y m odu le ha r n ess con n ector t h a t u ses t h e CAN Bu s, m ea su r e
th e volt a ge between t h e CAN C Bu s (-) cir cu it a n d gr ou n d.
Is t h e volt a ge above 3.0 volt s for eit h er cir cu it ?
All
Ye s → Go To 5
No → Go To 6
5 Tur n th e ign it ion off.
Usin g a volt m et er, con n ect on e en d to t h e CAN cir cu it th a t pr eviou sly m ea su r ed
above 3.0 volt s, a n d t h e oth er end t o grou n d.
NOTE: When performing the following steps, turn the ignition off and WAIT
ON E MIN U TE , b e fo r e d i s c o n n ec t ing a n y mo d u l e . R e p ea t t h i s fo r a ll m o d -
ules, failure to turn off ignition may result in damaging the disconnected
module.
Tur n th e ign it ion on .
Discon n ect a CAN Bu s modu le th e veh icle is equ ipped wit h . Mon it or a n d n ot e t h e
volt m et er rea din g.
NOTE:Repeat the above step for each CAN Bus module until all the modules
have been disconnected.
NOTE: Refer to the wiring diagrams in the service information to help
determine which modules are on the CAN Bus.
Is t h e volt a ge st ea dily a bove 3. 0 volt s wit h a ll t h e m odu les discon nect ed?
All
Ye s → Repa ir t h e CAN C Bu s (+) circu it a n d/or t h e CAN C Bu s (-) circu it
for a sh or t to volt a ge.
Per for m N AG1 TRAN SMISSION VE RIF ICATION TE ST - VER 1.
No → Repla ce t h e m odu le t h a t wh en discon n ect ed, th e shor t to volt a ge
wa s elim in a t ed.
Per for m N AG1 TRANSMISSION VERIF ICATION TE ST - VE R 1.
6 Tur n th e ign it ion off.
Discon n ect t he n ega t ive ba tt er y cable.
Wh ile ba ck pr obin g, mea su r e t h e r esist a n ce bet ween gr ou n d a n d t h e CAN C Bu s (+)
cir cu it .
Wh ile ba ck pr obin g, mea su r e th e r esist a n ce bet ween gr ou n d a n d th e CAN C Bu s (-)
cir cu it .
Is t h e resista n ce below 50.0 ohm s for eit h er mea su r em en t ?
All
Ye s → Go To 7
No → Go To 8
50
TRANSMISSION - NAG1
CAN B U S CIR CU IT — Co n t i n u ed