Dodge Sprinter 2006 - Cabin Heater Control High or Open (Active)

Symptom:
CABIN HE ATE R CON TROL H IGH OR OPEN (ACTIVE)
POSSIBLE CAUSES
CABIN H EATE R OR HE ATE R BOOSTE R CONTROL UN IT
CABIN H EATE R CONTROL CIRCUIT SH ORTE D TO VOLTAGE
AUTOMATIC TE MPE RATURE CONTROL (ATC)
CABIN H EATE R CONTROL CIRCUIT OP E N
AUTOMATIC TE MPE RATURE CONTROL (ATC)
TE S T ACTION AP PLICAB ILITY
1 Tur n th e ign it ion on .
Ver ify t h a t th e Ca bin H ea t er or Hea t er Booster is swit ch ed off.
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.
Discon n ect t he Ca bin Hea t er or Hea t er Boost er ha r n ess con nect or.
Con n ect a 12-volt test ligh t between t h e Ca bin H ea ter Con t r ol cir cu it a n d gr ou n d.
Tur n th e ign it ion on . Th e test ligh t sh ou ld opera t e a s follows:
Wit h th e Ca bin Hea t er or H ea t er Boost er swit ched off, t h e t est ligh t sh ou ld n ot
illuminate .
Pr ess t he Cabin Hea t er or H ea t er Boost er swit ch on . Th e test ligh t shou ld illu m in a t e
br igh t ly.
Does t h e test ligh t fu n ct ion as specified?
All
Yes, Ligh t On ly Illu m in a t es w/Swit ch On
Repla ce th e Ca bin H ea ter Assem bly or t h e H ea t er Boost er Assem -
bly in a ccor da n ce wit h th e Ser vice In for m a t ion .
Per for m BODY VERIFICATION TE ST - VE R 1.
No, Ligh t Illu m in a t es w/Swit ch Off
Go To 2
No, Ligh t Will N ot Illu m in a t e
Go To 3
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.
Discon n ect t he Ca bin Hea t er or Hea t er Boost er ha r n ess con nect or.
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.
Tur n th e ign it ion on .
Mea su r e th e volt a ge of th e Cabin Hea t er Con t r ol cir cuit .
Is t h e volt a ge above 0.2 volt s?
All
Ye s → Repa ir t h e Ca bin Hea t er Con t r ol cir cu it for a sh ort t o volt a ge.
Per for m BODY VERIFICATION TE ST - VE R 1.
No → Repla ce th e Aut om a t ic Tem pera t u r e Cont r ol (ATC) in a ccorda n ce
wit h th e Ser vice In for m a t ion .
Per for m BODY VERIFICATION TE ST - VE R 1.
148
HEAT IN G & A/C