HEATER VERIFICATION TEST - VER 1 APP LICABILITY
1. WARNING: N EVER OP ERATE THE HEATER IN AN ENCLOSED AREA THAT DOES
NOT H AVE EXHAU ST VEN TILATION FACILITIES . ALWAYS VE NT TH E HEATER’s
EXHAU S T WHE N OP ER ATIN G TH E HEATE R. FAILU RE TO F OLLOW THES E IN -
STR U CTION S CAN RES U LT IN P ERS ON AL IN J U RY OR DEATH .
2. WARNING:ALLOW THE HEATER ASS EMBLY TO COOL BEFORE P ERF ORMIN G A
COMP ONE N T IN S P ECTION /REPAIR/RE P LACEMEN T. FAILU RE TO F OLLOW
TH ES E IN S TRU CTION S CAN RE S U LT IN P ERS ON AL IN J U RY OR D E ATH.
3. N OTE: Th e h e at e r’s co n tro l u n it w ill s to re u p to fi ve DTCs in i ts m e m o ry.
4. N OTE: If th e he ate r’s co ntro l u n it de te cts a n e w fau lt in th e s ys te m, on e th at is not
alre a d y s to re d in i ts m e m o ry, i t w ill c le a r th e o ld e s t o f th e fiv e s to re d D TCs , an d it
will store the new fault’s DTC.
5. N OTE: If th e h e ate r’s co ntrol u n it d ete cts a reo cc urre nce of a store d fau lt, it w ill
overwrite that fault’s DTC with the most recent occurrence.
6. Ver ify th a t th e veh icle’s ba t t er y is fully ch a r ged.
7. Ver ify th a t t h er e is m or e th a n 1/8 of a t a n k of fuel in t h e veh icle’s fu el ta n k. Add fu el, if
necessa r y.
8. Ver ify t ha t all hea t er ’s coola n t hoses an d fuel lin es a r e secu rely fa st ened to th eir respect ive
compon en t s.
9. Discon n ect a ll j u m per wir es an d recon n ect a ll pr eviou sly discon n ect ed componen t s an d
conn ect or s.
10. If a h ea t er in st a lla t ion /coolin g syst em service wa s per form ed, pu r ge t h e coola n t circu it of air
in accor da n ce wit h t h e Ser vice In for m a t ion .
11. Tu r n th e ign it ion on .
12. Ver ify th a t th e Ca bin Hea t er or Hea t er Boost er i s swit ch ed off.
13. E n su r e t h a t a ll a ccessor ies a r e t u r n ed off.
14. Set th e blen d con t r ol to t h e ma x h ea t posit ion a n d t h e mode con t r ol t o th e floor posit ion .
15. If a fuel syst em ser vice r equ ir in g fu el t o dr a in out of t h e h ea t er ’s fuel lin e wa s per for m ed,
pr im e th e h ea ter ’s Dosin g P u m p in a ccor da n ce wit h th e Ser vice In for m a t ion .
16. With t h e DRBIII", recor d an d era se a ll DTCs from t h e Ca bin H ea t er Modu le or H ea t er
Boost er Modu le. Tur n t h e ign it ion off, wa it 5 secon ds, t hen t u r n st a r t th e en gin e.
17. Allow th e en gin e to idle.
18. NOTE: Do n ot dis co nn ec t th e ve h icle ’s ba tte ry or th e he ate r’s m ain powe r su pply
w h ile th e h e a t e r is in op e ra tio n or in ru n -d o w n m o d e . F a ilu re t o fo llow th e s e
instructions can result in excess emissions from the heater during heater operation.
19. Swit ch t he Ca bin H ea t er or H ea t er Boost er on . Allow th e h eat er t o ru n t h r ou gh a t lea st on e
cycle of oper a t ion (a ppr oxim a t ely 10 min u t es), a nd t h en t u r n th e hea t er off.
20. Wit h th e DRBIII", r ead t h e Ca bin Hea t er or Hea t er Boost er Modu le’s DTC.
21. Tu r n th e en gin e off.
Are a n y DTC’s presen t or is t h e origin a l con dit ion st ill pr esen t ?
All
Ye s → Repa ir is n ot complet e, r efer to t h e a ppr opr ia t e sym pt om .
No → Repa ir is com plete.
246
VERIFICAT ION TEST S
Ve r i f i c a t i o n Te s t s — Co nt i n u e d
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