Page 15 of 1954
* Accordin g t o stat e an d federa l regulations , failur e t o perfor m maintenanc e o n th e item s marke d wit h a n asteris k (* ) wil l no t voi d customer' s emissio n
warranties . However , Acur a recommend s tha t al l maintenanc e service s b e performe d a t th e recommende d tim e o r mileag e perio d t o ensur e long-ter m reliability .
Fo r Canadia n models : Follo w th e Sever e Condition s Maintenanc e Schedul e o n pag e 3- 4 an d 3-5 .
17-14 , 17-2 3
18-3, 18-21 , 18-22
16- 3
19-2 8
8-4, 10-5 ,14-10 8, 15-4 ,17-16 , 19- 8
10-2
9-5
11-126
ProCarManuals.com
Page 17 of 1954

17-14, 17-2 3
18-3, 18-21 , 18-22
16- 3
19-2 8
8-4, 10-5 ,14-108 , 15-4 ,17-16 , 19- 8
10-2
9-5
11-126
23-12 3
* Accordin g t o stat e an d federa l regulations , failur e t o perfor m maintenanc e o n th e item s marke d wit h a n asteris k (* ) wil l no t voi d customer' s emissio n
warranties . However , Acur a recommend s tha t al l maintenanc e services be performe d a t th e recommende d tim e o r mileag e perio d to ensur e long-ter m
reliability .
Severe Drivin g Conditions :
• Drivin g les s tha n 5 mile s ( 8 km ) pe r tri p or , i n freezin g temperatures , drivin g les s tha n 1 0 mile s (1 6 km ) pe r trip .
• Drivin g in ho t [ove r 90° F (32°C) ] conditions .
• Extensiv e idlin g o r lon g period s o f stop-and-g o driving .
• Traile r towing , drivin g wit h a roof-to p carrier , o r drivin g in mountainou s conditions .
• Drivin g o n muddy , dusty , o r de-ice d roads .
NOTE: I f th e vehicl e is drive n OCCASIONALL Y unde r a "severe " condition , yo u shoul d follo w th e Norma l Condition s Maintenanc e Schedul e o n page s
3-2 and 3-3 .
ProCarManuals.com
Page 34 of 1954
Power Windows
Component Location Index
'02 model:NOTE: Refer to the '96 - 01 3.5RL Service Manual, P/N 61SZ305, for the items not shown in this section.
POWER WINDO WRELAYTest, pag e 23-6 8
UNDER-DAS HFUSE/RELAYBOX
POWE R WINDO W MASTE R
SWITCH *
Driver's windo w switc hTest, pag e 23-4 4
Replacement , pag e 23-31 6
DRIVER' S WINDO W
MOTO R
Test , pag e 23-4 1
LEF T REA R WINDO W MOTO R
Test , pag e 23-31 7 POWE
R WINDO W CONTRO L UNI T
Input , Tes t 23-4 2
FRON T PASSENGER' S WINDO W SWITC H
•Test , pag e 23-31 7
Replacement , pag e 23-31 6
FRON T PASSENGER' S WINDO W MOTO R
Test , pag e 23-31 7
RIGH T REA R WINDO W SWITC H
Test , pag e 23-31 7
Replacement , pag e 23-31 6
RIGH T REA R WINDO W MOTO R
Test , pag e 23-31 7
LEF T REA R WINDO W
SWITC H
Test , pag e 23-31 7
Replacement , pag e 23-31 6
* : Yo u ca n als o tes t th e switche s b y usin g th e self-diagnosi s functio n (mod e 2) . (Se e pag e 23-25 2 o f th e '96-0 1 3.5R L Servic e Manual. ]
ProCarManuals.com
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 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 49 of 1954
OnStar Control Unit Input Test
1. Remove the rear seat (Refer to the '96 - '01 3.5RL Service Manual, P/N 61SZ305, for the items not shown in this sec-
tion).
2. Disconnect the 32P connectors from the OnStar control unit.
3. Inspect the connector and socket terminals to be sure they are all making good contact.
• If the terminals are bent, loose or corroded, repair them as necessary, and recheck the system.
• If the terminals look OK, make the following input tests at the connector.
— If any test indicates a problem, find and correct the cause, then recheck the system.
— If all the input tests prove OK, the control unit must be faulty; replace it.
32P CONNECTOR A (red):
Wire side of female
terminals
32P CONNECTOR B (blue):
Wire side of female terminalsProCarManuals.com
Page 142 of 1954
PGM-FI System
Primary Heated Oxygen Sensor (HO2S) (Sensor 1) (cont'd)
Troubleshooting Flowchart
Is DTC P0133 and/or P0153
indicated?
NO
YES
Intermittent failure, system is OK
at this time. Check for poor con-
nections or loose terminals at
C251, C254 (located at right shock
tower), C119 (right primary H02S
(Bank 1, Sensor 1)) or C126 (left
primary H02S (Bank 2, Sensor
1))*
and
PCM.
— The MIL has been reported on.
— DTC P0133 and/or P0153
stored.
Problem verification:
1. Do the PCM Reset Procedure.
2. Start the engine. Hold the
engine at 3,000 rpm with no
load (in Park or neutral) until
the radiator fan comes on.
3. Connect the SCS service con-
nector.
4. Test-drive under following
conditions.
— 55 mph (88 km/h) steady
speed
— Transmission in posi-
tion
— Until readiness code comes
on
Replace the primary HO2S (Sen-
sor 1).ProCarManuals.com
Page 158 of 1954
PGM-FI System
Barometric Pressure (Baro) Sensor
The HDS or the scan tool indicates Diagnostic Trouble Code (DTC) P2227: A range/performance problem in the
Barometric Pressure (BARO) Sensor circuit.
Is DTC P2227 indicated?
Intermittent failure, system is OK
at this time.
YES
Substitute a known-good PCM
and recheck. If symptom/indica-
tion goes away, replace the origi-
nal
PCM.
Problem verification:
1. Do the PCM reset procedure.
2. Connect the SCS service con-
nector.
3. Start the engine. Hold the
engine at 3,000 rpm with no
load (in Park or neutral) until
the radiator fan comes on,
then let it idle.
4. Test-drive with the transmis-
sion in position.
5. Accelerate for five seconds
using wide open throttle.
— The MIL has been reported on.
— DTC P2227 is stored.ProCarManuals.com