TE S T ACTION AP PLICAB ILITY
2 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 .
WA R N I N G : A L L O W T H E H E AT E R A S S E M B LY T O C O O L B E F O R E P E R -
FOR MIN G A COMP ON EN T INS P E CTION /RE PAIR /REP LACE MEN T. FAIL-
UR E TO F OLLOW THES E IN STR U CTION S CAN RE SU LT IN P E RS ON AL
IN JU 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 .
Wit h th e DRBIII", r ecor d a n d era se th e Ca bin H ea t er or H ea t er Boost er Modu le’s
DTCs.
St a r t th e engin e. Allow th e en gin e t o idle.
Wit h t h e DRBIII", m on it or for Ca bin H ea t er Modu le or Hea t er Boost er Modu le 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 ter Booster on . If oper a ble, a llow th e hea t er t o r u n
th r ou gh at lea st on e cycle of oper a t ion (a ppr oxim a t ely 10 m in u t es), a nd th en swit ch
th e h eat er off.
Does t h e DRBIII" display a ny DTCs?
All
Ye s → If t h e H ea t er In Lockou t Mode DTC is pr esen t , r ecord a n d er a se
DTCs befor e per for m in g an y dia gn ost ic pr ocedu r es. Ret u r n t o t h e
sym pt om list a n d ch oose t h e sym pt om (s).
Per for m H E ATE R VERIF ICATION TE ST - VER 1.
No → Go To 3
70
CABI N H EAT ER
A. HEATER P RE-TEST — Co n t i n u ed
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