4.2.4 DRBIII! SAFETY INFORMATION
WARNING: EXCEEDING THE LIMITS OF THE
DRBIII! MULTIMETER IS DANGEROUS. IT
CAN EXPOSE YOU TO SERIOUS OR
POSSIBLE FATAL INJURY. CAREFULLY
READ AND UNDERSTAND THE CAUTIONS
AND THE SPECIFICATION LIMITS.
• Follow t h e veh icle m an u fact u r er ’s ser vice speci-
fica t ion s a t a ll times.
• Do not u se th e DRBIII" if it h as bee n d amage d .
• Do n ot u se t he t est lea ds if t h e in su la t ion is
da ma ged or if met al is exposed.
• To a void elect r ica l sh ock, do n ot t ou ch th e test
lea ds, t ips, or th e cir cu it bein g t est ed.
• Ch oose t h e pr oper r an ge a n d fun ct ion for t h e
mea su rem en t. Do not tr y volt age or cur ren t mea -
su rem ent s t h at m a y exceed th e ra t ed capa cit y.
• Do not exceed t h e lim it s sh own in t he ta ble below:
FUNCTION INPUT LIMIT
Volts 0 - 500 pea k volt s AC
0 - 500 volt s DC
Oh m s (r esist a n ce)* 0 - 1.12 m ega oh m s
Fr equen cy Mea su red
Fr equen cy Gen er a t ed
0-10kHz
Tem per at u r e -58 - +1100°F
-50 - +600°C
* Oh m s can not be mea su r ed if volta ge is pr esen t.
Oh m s ca n be m ea su red only in a non -power ed
cir cu it .
– Volt age bet ween a n y ter m in a l and grou n d
mu st n ot exceed 500v DC or 500v pea k AC.
– U se ca u t ion when mea su rin g volt age a bove
25v DC or 25v AC.
– U se th e low cu r ren t sh un t t o mea su re cir cu it s
up t o 10A. Use th e h igh cur r ent cla m p t o
mea su re cir cuit s exceedin g 10A.
– Wh en t estin g for t h e presen ce of volt a ge or
cur r en t, m ake su re t h e m et er is fu n ct ion in g
corr ect ly. Ta ke a r ea din g of a kn own volt a ge or
cur r en t befor e accept in g a zer o readin g.
– Wh en mea su rin g cur r ent , conn ect th e m et er in
series wit h t est loa d.
– Wh en usin g th e m et er fun ction , keep th e
DRBII I" a wa y fr om spa r k plu g or coil wir es to
avoid m ea su rin g err or from ou t side in t er fer-
en ce.
4.3 WARNING
4.3.1 VEHICLE DAMAGE WARNINGS
Befor e discon n ectin g a ny con t rol m odu le, m a k e
su re th e ign it ion is ‘‘off ’’. Fa ilu r e t o do so could
da ma ge th e m odu le.
Wh en test in g volt age or con t in u it y at an y con tr ol
modu le, u se th e t er min al side (not t h e wir e en d) of
th e con n ect or. Do n ot pr obe a wir e t h r ough th e
in su la t ion ; t h is will da ma ge it a n d even t ua lly ca u se
it t o fail beca use of cor rosion .
Be ca r eful wh en per for m in g elect r ica l t est s so as
to pr even t a ccident a l sh or t in g of t er min als. Su ch
mist a kes ca n da m age fu ses or com pon en ts. Also, a
second code cou ld be set, m a kin g dia gn osis of t h e
origin a l problem m or e difficu lt .
4.3.2 ROAD TESTING A COMPLAINT
VEHICLE
Som e compla in ts will requ ir e a test dr ive a s pa rt
of t h e repair ver ifica tion pr ocedur e. Th e pu r pose of
th e t est dr ive is t o tr y t o du plica t e th e dia gn ost ic
code or sym pt om condit ion .
CAUTION: Before road testing a vehicle, be
sure that all components are reassembled.
During the test drive, do not try to read the
DRBIII! screen while in motion. Do not hang
the DRBIII! from the rear view mirror or
operate it yourself. Have an assistant
available to operate the DRBIII!.
4.4 DIAGNOSIS
1. You r dia gn ost ic t est pr ocedu re mu st begin wit h a
th or ough visu a l in spection of t h e syst em in ques-
tion for da m a ged com pon ent s or discon n ected
conn ect ors. F or ABS, t h e bra ke la mps m ust be
opera t ion a l pr ior t o cont in u in g.
2. Conn ect t he DRBIII" t o t h e da t a lin k con n ect or
loca t ed un der t he da sh . If t h e DRBIII" does not
power u p, ch eck t h e power a n d grou n d su pplies
to t h e con nect or.
3. Select t h e syst em in qu est ion . Tur n th e i gn it ion
on. If t h e DRBIII" displa ys ‘‘No Respon se”, r efer
to Com m un icat ion in th e Body Dia gn ost ic P r o-
cedur es m an u a l t o dia gn ose th e sym pt om .
4. Rea d a nd r ecor d a ll dia gn ost ic t r ouble codes. If
an y a ddit ion a l codes ar e pr esen t, pr oceed to t h e
appr opr ia t e test .
5. For ABS, if th er e a r e no dia gn ost ic tr ouble codes
pr esen t , select ‘‘Inpu t s/Out pu t s’’ an d rea d t he
Br a k e Swit ch an d Bra k e La mp Swit ch in pu t s a s
you pr ess an d r elea se t h e br a k e peda l. If t h e
6
GEN ERAL I N FORM AT I ON
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