Gen er al In for ma t ion Sect ion or in t h e service ma n -
ua l pr ocedu res. F ollowin g t h ese pr ocedu r es is ver y
im por t a n t to t h e sa fet y of t he in dividua ls per for m -
in g dia gnost ic t est s.
4.2.2 VEHICLE PREPARATION FOR
TESTING
Ma ke su re th e vehicle bein g t est ed h a s a fu lly
cha r ged ba tt er y. If it does n ot , false dia gn ost ic codes
or er r or messa ges ma y occu r.
4.2.3 SERVICING SUB-ASSEMBLIES
Som e compon en ts of t h e body system a r e in -
ten ded to be ser viced as a n a ssem bly on ly. Att em pt -
in g t o rem ove or r epa ir cer ta in syst em su bcom po-
nen t s ma y r esult in per son al in ju r y a n d/or
im pr oper syst em opera t ion . Only t h ose com pon en t s
wit h a ppr oved r epa ir an d in st allat ion pr ocedur es in
th e ser vice ma n ua l sh ou ld be ser viced.
4.2.4 DRBIII! SAFETY INFORMATION
WARNING: EXCEEDING THE LIMITS OF THE
DRBIII! MULTIMETER IS DANGEROUS.
READ ALL DRBIII! INSTRUCTIONS BEFORE
USING THE MULTIMETER. FAILURE TO
FOLLOW THESE INSTRUCTIONS CAN
RESULT IN PERSONAL INJURY OR DEATH.
• 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 th e pr oper ra n ge a nd fun ct ion s for t h e
mea su rem en t. Do not tr y volt age or cur ren t mea -
su rem ent t h at m a y exceed th e ra t ed ca pa 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 (Resist a n ce)* 0 - 1.12 m ega oh m s
Fr equen cy Mea su re
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 on 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 he loa d.
– Discon n ect t h e live t est lea d befor e discon nect -
in g t he comm on test lea 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 WARNINGS
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 to fa il becau se of cor r osion . Be ca r eful wh en
perfor m in g elect rica l t est s so as to pr even t acciden -
ta l sh or t in g of t er min als. Su ch m ist akes ca n da m-
age fu ses or com pon en t s. Also, a secon d code cou ld
be set , ma kin g dia gnosis of t h e or igin a l pr oblem
mor 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 .
12
GEN ERAL I N FORM AT I ON
To Next Page
Loading...
