TE S T ACTION AP PLICAB ILITY
4 WA R N I N G : N E V E R O P E R AT E T H E H E AT E R I N A N E N C L O S E D A R E A
TH AT D OES N OT HAVE EXH AU S T VEN TILATION FACILITIES . A LWAYS
VEN T THE EXHAU S T WHE N OP ERATIN G THE HE ATER. F AILU R E TO
FOLLOW TH ES E IN S TRU CTIONS CAN RES U LT IN P E RS ON AL IN J U RY
OR D E ATH .
Refill t h e coolin g syst em in a ccor da n ce wit h th e Ser vice In for m a t ion .
Star t t he engine.
Allow th e engin e to r ea ch n or ma l oper at in g t em per a t u r e.
Tur n th e en gin e off.
Allow th e engin e coolan t t o cool down to a t em per a t u r e of 50°C (122°F ).
Star t t he engine.
Allow th e engin e to r ea ch n or ma l oper at in g t em per a t u r e.
Tur n th e en gin e off.
Vie w r ep a ir
All
Repa ir
Go To 5
5 WA R N I N G : N E V E R O P E R AT E T H E H E AT E R I N A N E N C L O S E D A R E A
TH AT D OES N OT HAVE EXH AU S T VEN TILATION FACILITIES . A LWAYS
VEN T THE EXHAU S T WHE N OP ERATIN G THE HE ATER. F AILU R E TO
FOLLOW TH ES E IN S TRU CTIONS CAN RES U LT IN P E RS ON AL IN J U RY
OR D E ATH .
NOTE: Th e h e a te r’s co n tro l u n it w ill s to re u p to fi v e D TCs in its m e m o ry.
NOTE:If the heater’s control unit detects a new fault in the system, one that
is n o t a lre ad y st o re d in i t s m e m o ry, it w ill c le a r th e old e s t of t h e fiv e s t ore d
DTCs, and it will store the new fault’s DTC.
NOTE: If the heater’s control unit detects a reoccurrence of a stored fault,
it w ill overw rite that fault’s DTC with the most recent occurrence.
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.
Set t h e blen d con t r ol t o th e m a x h ea t posit ion a n d t he m ode cont r ol t o th e floor
posit ion .
St a r t th e engin e. Allow th e en gin e t o idle.
Wit h t h e DRBIII, mon itor for Ca bin H ea t er or H ea t er Boost er Module DTCs wh ile
per for m in g t h e followin g st ep.
NOTE: Do not disconnect the vehicle’s battery or the heater’s main power
su p p ly w hi le th e h e at e r is i n o p e ra tio n or i n ru n -d o w n m o d e . Fa i lu re to
fo ll o w t h e s e i n s t ru c t i o n s c a n r e s u l t i n e x c es s e mi s s io ns fr o m t h e hea t e r
during heater operation.
Swit ch t h e Ca bin H ea t er or H ea t er Boost er on . If necessar y, allow t h e hea t er t o ru n
th r ou gh a t lea st one cycle of oper a tion (a ppr oxim a t ely 10 min u t es), a n d th en t u r n th e
hea t er off.
Tur n th e en gin e off.
Does t h e DRBIII" display a ny DTCs?
All
Over hea t ing Rela t ed DTC(s) Reset
Repla ce t h e Ca bin H ea t er Assem bly or Hea t er Boost er Assem bly
in accor da n ce wit h t h e Ser vice In for m a t ion .
Per for m H E ATE R VERIF ICATION TE ST - VER 1.
Ovr h ea t n g DTC(s) clea r, Ot h er DTC(s) Set
Ret u r n t o t h e sym pt om list an d ch oose th e sym pt om (s).
Per for m H E ATE R VERIF ICATION TE ST - VER 1.
No DTCs Present
Test Com plete.
95
CABI N H EAT ER
HEATER IN LOCKOUT MODE — Co n t inued
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