Symptom:
AUX FAN R EL AY CO NT R O L H I GH OR OP E N ( ACT IVE )
POSSIBLE CAUSES
A/C AUXILIARY FAN RE LAY HIGH SIDE CON TROL CIRCUIT SHORTE D TO VOLTAGE
GROU ND CI RCUI T OP E N
A/C AUXILIARY FAN RE LAY HIGH SIDE CON TROL CIRCUIT OP E N
A/C AUXILIARY FAN RE LAY
AUTOMATIC TE MPE RATURE CONTROL (ATC)
TE S T ACTION AP PLICAB ILITY
1 Tur n th e ign it ion off.
NOTE: Ch e c k c o n n e c to rs - Cle an /re pa i r a s n e c e ss a ry.
Rem ove t h e A/C Auxilia r y Fa n Relay from t he r ela y cen t er.
Discon n ect t he Aut om a t ic Tem pera t u r e Con t r ol (ATC) C1 ha r n ess conn ect or.
Mea su r e th e volt a ge of th e A/C Auxilia r y F a n Rela y H igh Side Con t r ol cir cu it .
Is t h e volt a ge above 0.2 volt s?
All
Ye s → Repa ir t h e A/C Au xilia r y F a n Relay H igh Side Con t r ol cir cu it for
a sh or t to volt a ge.
Per for m BODY VERIFICATION TE ST - VE R 1.
No → Go To 2
2 Tur n th e ign it ion off.
NOTE: Ch e c k c o n n e c to rs - Cle an /re pa i r a s n e c e ss a ry.
Rem ove t h e A/C Auxilia r y Fa n Relay from t he r ela y cen t er.
Mea su r e t he r esist a n ce bet ween grou n d an d th e Gr oun d ci r cu it in t h e r ela y cen t er
(A/C Au xilia r y F a n Rela y conn ect or ter m in a l 85).
Is t h e resista n ce below 5.0 ohm s?
All
Ye s → Go To 3
No → Repa ir th e Gr oun d cir cuit for an open .
Per for m BODY VERIFICATION TE ST - VE R 1.
3 Tur n th e ign it ion off.
NOTE: Ch e c k c o n n e c to rs - Cle an /re pa i r a s n e c e ss a ry.
Rem ove t h e A/C Auxilia r y Fa n Relay from t he r ela y cen t er.
Discon n ect t he Aut om a t ic Tem pera t u r e Con t r ol (ATC) C1 ha r n ess conn ect or.
Mea su r e t he r esist a nce of th e A/C Au xilia r y Fa n Rela y High Side Con t r ol cir cu it
bet ween t h e Au tom a t ic Tem per a t u r e Con t r ol (ATC) C1 h a r n ess conn ect or a n d th e
rela y cen t er (A/C Auxilia r y F a n Rela y con n ect or ter m in a l 86).
Is t h e resista n ce below 5.0 ohm s?
All
Ye s → Go To 4
No → Repa ir t h e A/C Au xilia r y F a n Rela y H igh Side Con t r ol circu it for
an open.
Per for m BODY VERIFICATION TE ST - VE R 1.
140
HEAT IN G & A/C
To Next Page
Loading...
