Page 41 of 1954

Test/Replacement ('0 2-04 Mode l USA )
NOTE : Befor e testing , chec k th e No . 1 3 (7. 5 A ) fuse . No .
7 , 10 , 11 , 13 , 1 4 an d 1 5 terminal s ar e OnSta r switche s
microphon e power , groun d an d signa l lines .
1 . Disconnec t th e 16 P connecto r fro m th e mirror . 2
. Chec k fo r voltag e betwee n th e No . 1 2 termina l an d
bod y groun d wit h th e ignitio n switc h O N (II) .
• I f ther e is batter y voltage , g o to ste p 3 .
• I f ther e is n o voltage , chec k for :
— an ope n in th e wire , o r
— poo r groun d (G401 , G402) .
3 . Chec k fo r voltag e betwee n th e No . 1 6 termina l an d
bod y groun d wit h th e ignitio n switc h O N (II ) an d
A/T gea r positio n in
• I f ther e i s batter y voltage , replac e th e mirro r b y
removin g tor x screw .
• I f ther e is n o voltage , chec k for :
— an ope n in th e wire , o r
— fault y revers e relay , o r
— fault y transmissio n rang e switch , o r
— fault y diode .
Wire sid e o ffemal e terminal s
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Page 42 of 1954
Stereo Soun d Syste m
Audio Uni t Terminal s
'02-03 Mode ls Withou t Navigatio n System :
'0 2-03 Mode ls Wit h Navigatio n System :
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Page 43 of 1954

Cavity
Wire
Connects to
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
BLU
WHT
RED/BLK
WHT/YEL
WHT/RED
YEL/BLU
ORN
YEL
BRN
BLK
PNK
RED
GRN/RED
BLK
GRN
RED
Output (Right front +)
Output (Left front +)
Lights-on signal
Constant power
ACC (Main stereo power
supply)
Stereo amplifier (power)
Output (Left rear +)
Output (Right rear +)
Output (Right front -)
Output (Left front -)
OnStar system interface unit
(Cellular phone)
Dash lights brightness
Radio remote switch
Ground (G403)
Output (Left rear-)
Output (Right rear-)
*2B2
*2B3
B5
B8
WHT
BLU/RED
BLK
BLU or GRN*1
OnStar control unit (Line in +)
OnStar control unit (Line in -)
Ground (G401,G402)
Multiplex control unit (pas-
senger's)
Terminal B1, B4, B6 and B7 are not used.
C4
C7
*1C8
*1C9
C10
WHT
LT GRN
BLU/RED
WHT
BLK
Navigation unit
Navigation unit
OnStar control unit (Line in -)
OnStar control unit (Line in +)
Navigation unit
Terminal C1, C2, C3, C5, C6, C11 and C12 are not used.
*1: With navigation system (USA)
*2: Without navigation system (USA)ProCarManuals.com
Page 44 of 1954
OnStar Syste m ('0 2-03 Mode ls USA )
Componen t Locatio n Inde x
CELLULA R PHON E ANTENN A
Replacement , pag e 23-6 7
ONSTA R SYSTE M
GP S ANTENN A
ONSTA R CONTRO L UNI T
Inpu t Test , pag e 23-5 9 ONSTA
R SYSTE M INTERFAC E
UNITInpu t Test , pag e 23-6 2
ONSTA R SYSTE M RADI O
FREQUENC Y MODULATO R
UNITInpu t Test , pag e 23-6 4 ONSTA
R BUTTON S an d
MICROPHONE/AUTOMATI C
DIMMIN G MIRRO R
OnSta r Button s an d
Microphon e Inpu t Test ,
Pag e 23-6 6 ONSTA
R BUTTO N
DO T BUTTO N
MICROPHON E EMERGENC
Y BUTTO N
ONSTA
R INDICATO R
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Page 45 of 1954

Description
Basic operation:
1. OnStar system is activated.
2. Data is transmitted to service provider.
GPS SATELLITES
Two-way cellular communication
with call center.
Dispatch
Rescue/Police
911 CALL
CENTER
3. Call center associate makes appropriate response:
— Accident/Emergency notification (Police, Fire and EMS, etc.)
— Airbag deployment (Accident)
— Roadside assistance
— Stolen vehicle tracking
— Remote door lock/unlock command
— Misplaced vehicle (Flashes parking lights/honks horn)
— Route guidance
— Ride Assist
— Concierge services/convenience
Buttons and indicator:
DOT BUTTON
ONSTAR INDICATOR
Solid Green Light: System OK
Flashing Green Light: Call in
progress
Solid Red Light: System
malfunction
Flashing Red Light: Call
in progress, but malfunction
in system exist.
ONSTAR BUTTON
EMERGENCY BUTTON
Activation and termination
of voice recognition
(VR) for virtual advisor and cellular phone.
Used to connect to call
center (voice based information
service).
Used for emergencies.
Emergency calls have priority
over all others.
ONSTAR CALL
CENTER
(Human Advisor)
Requests for
dispatchProCarManuals.com
Page 46 of 1954

OnStar Syste m ('0 2 Mode l USA )
Descriptio n (cont'd )
Stolen vehicl e tracking :
If th e vehicl e i s stolen , th e owne r ca n repor t i t t o th e cal l center . The y wil l notif y th e authoritie s an d trac k th e vehicl e loca -
tio n t o assis t i n recovery .
Virtual advisor :
1. Virtua l adviso r setup . A subscribe r set s u p a persona l profil e o n thei r hom e compute r throug h th e interne t a t th e
OnSta r we b site .
— Stoc k portfoli o
— Traffi c
— Sport s
— New s
— Weather
— E-mai l
2 . Subscribe r call s OnSta r cal l center .
3 . OnSta r receive s an d processe s request .
4 . Profil e accesse d fo r requeste d information .
5 . OnSta r send s informatio n bac k t o subscriber . A compute r voic e relay s th e requeste d information .
Cellular phone :
The use r can mak e a hands-fre e cellula r phon e cal l wit h on e touc h (b y pressin g th e "dot " button) , an d b y usin g voic e
recognitio n commands .
Remote operation :
Vehicle door s ca n b e locke d remotel y if forgotte n o r unlocke d whe n key s ar e accidentall y lef t insid e th e vehicle . I f th e vehi -
cl e is misplace d in a parkin g lot , vehicl e aler t (honk s th e hor n an d Flashe s th e parkin g lights ) ca n b e requeste d remotely .
NOTE : Durin g norma l vehicl e operation , th e syste m is i n hig h powe r mode . Afte r th e ignitio n switc h i s turne d OF F th e sys -
te m wil l g o int o lo w powe r mod e fo r 4 8 hours , afte r tha t th e syste m wil l switc h t o slee p mod e t o conserv e batter y power .
Whe n
in lo w powe r mode , the syste m will switc h back to th e hig h powe r mod e for 1 minut e out o f ever y 10 minute s for a
perio d o f 4 8 hours . Remot e operatio n is onl y availabl e durin g th e 1 minut e perio d o f hig h powe r operation . Whe n th e sys -
te m is i n slee p mode , remot e operatio n i s no t possible .
Registerin g replacemen t components :
If th e OnSta r contro l uni t o r th e OnSta r radi o frequenc y modulato r uni t ar e replaced , yo u mus t cal l OnSta r deale r suppor t
b y regula r telephon e an d registe r th e ne w seria l number(s) .
OnStar contro l unit :OnSta r syste m radi ofrequenc y modulato r unit :
SERIA L NUMBE R
SERIAL NUMBE R
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Page 47 of 1954

Emergency call operation:
Button/Item
Emergency button
OnStar button
Dot button
Speaker
Phone line
LED indicator
Audio volume
Pre-call status
Button is pushed
Waiting
Green light
Call in progress
Emergency call in progress
This button is inactive during an emergency call
Ends emergency call when pushed
Sound of system calling
Connecting to call cen-
ter
Call center communication
Linking to
call center
Flashing green light
Call ends
(Dot button
pushed)
Post-call status
Waiting
Green light
Can be adjusted at any time by turning the volume knob
OnStar Call operation:
Button/Item
Emergency button
OnStar button
Dot button
Speaker
Phone line
LED indicator
Audio volume
Pre-call status
Button is pushed
Waiting
Green light
Call in progress
Will switch over to an emergency call when pushed
OnStar service call in the progress
Ends OnStar service call when pushed
Sound of system calling
Connecting to call
center
Call center communication
Linking to
call center
Call ends
(Dot button
pushed)
Flashing green light
Post-call status
Waiting
Green light
Can be adjusted at any time by turning the volume knob
Voice recognition operation:
Button/Item
Emergency button
OnStar button
Dot button
Speaker
Phone line
LED indicator
Audio volume
Pre-call status
Button is pushed
Waiting
Green light
Voice recognition mode in use
Will switch over to an emergency call when pushed
Will switch over to OnStar service call when pushed
Voice recognition mode is activated ends the voice
recognition mode when pushed a second time
"Ready"
Acknowledgement
Waiting
Feedback sound of voice recog-
nition
for verbal command
Green light
Post-call status
Waiting
Green light
Can be adjusted at any time by turning the volume knob
Voice recognition for cellular phone:
Button/Item
Emergency button
OnStar button
Dot button
Speaker
Phone line
LED indicator
Audio volume
Pre-call status
Button is pushed
Waiting
Green light
Voice recognition mode for cellular phone in use
Will switch over to an emergency call when pushed
Will switch over to OnStar service call when pushed
Voice recognition mode is activated ends the voice
recognition mode when pushed a second time
"Ready"
Acknowled-
gement
Feedback
sound of voice
recognition
Waiting for verbal command
Green light
Conversation in
progress
Linking to phone network
Flashing green light
Post-call status
Waiting
Green light
Can be adjusted at any time by turning the volume knobProCarManuals.com
Page 48 of 1954

OnStar Syste m ('0 2 Mode l USA )
Troubleshootin g
1. Chec k th e No . 5 6 (7. 5 A ) fus e i n th e under-hoo d
fuse/rela y bo x an d th e No . 4 (1 0 A ) fus e i n th e
under-das h fuse/rela y box .
Are the fuses OK?
YES - G o to ste p 2 .
NO - Fin d an d repai r th e caus e o f th e blow n fuse .
2. Remov e the rea r sea t (Refe r to th e '96-'0 1 3.5R L
Servic e Manual , P/ N 61SZ305 , fo r th e item s no t
show n in thi s section) .
3 . Chec k fo r continuit y betwee n th e A3 2 termina l o f
th e OnSta r contro l uni t an d bod y ground .
Is there continuity?
YES - G o to ste p 4 .
NO - Repai r ope n i n th e BL K wir e betwee n th e
OnSta r contro l uni t an d G601 .
4 . Chec k fo r continuit y betwee n th e B 1 termina l o f th e
OnSta r syste m interfac e uni t an d bod y ground .
Is there continuity?
YES - G o to ste p 5 .
NO - Repai r ope n i n th e BL K wir e betwee n th e
OnSta r syste m interfac e uni t an d G401 , G402 .
5 . Wit h th e ignitio n switc h OFF , pres s an d hol d th e
"dot " button . Tur n th e ignitio n switc h fro m OF F t o
AC C thre e time s an d bac k t o ACC , the n releas e th e
"dot " button .
6. Th e indicato r wil l flas h (gree n o r red ) i f an y failure s
hav e bee n detected . Troubleshoo t th e DTC s a s indi -
cate d below :
DTC
1
2
3
4
5
Sel f Diagnostic s Item s
GPS signa l erro r
Inter-devic e dedicate d
bu s malfunctio n
Deploymen t com -
mande d circui t
malfunctio n
OnSta r contro l uni t
malfunctio n
Cellula r phon e selec t
servic e switc h malfunc -
tio n (butto n module )
Note
OnSta r syste m
radi o frequenc y
modulator uni t com -
munication s erro r
SR S signa l ou t i s
ope n
Will onl y show s a s
"history " durin g
DTC displa y Example
: Whe n DTC 1 an d DTC 2 ar e detecte d
T1: 1 sec . T2 : 0. 2 sec . T3 : 0. 3 sec . T4 : 2 sec . T5 : 3 sec .
NOTE :
• Gree n indicato r flashe s histori c (stored ) failur e DTCs .
• Re d indicato r flashe s curren t failur e DTCs .
• Curren t DTCs , ar e displaye d first , followe d b y histor y
DTCs, i f any .
• DTC s ar e displaye d in numerica l orde r fo r tw o cycles .
Th e indicato r return s t o norma l functio n afte r th e tw o
cycles .
How to clea r th e codes :
Press th e OnSta r butto n withi n 3 second s afte r th e sec -
on d DT C cycle .
Ho w to ente r demonstratio n mode :
1 . Whe n ignitio n switc h i s turne d OF F withi n 3 se c
afte r DTC , syste m wil l b e shifte d t o demonstratio n
mode .
2. Eac h signals will be appea r in orde r below .
• 2 sec afte r ignitio n switc h is OFF : Doo r loc k
• 1 sec afte r doo r lock : door : Doo r unloc k
• 1 sec afte r doo r unlock : Hor n an d exterio r light s
perio d o f 0. 7 sec .
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