tran DAEWOO LACETTI 2004 Service Owners Manual

ENGINE CONTROLS 1F – 629
DAEWOO V–121 BL4
tentially interfere with the operation of the Exhaust Gas
Recirculation (EGR) valve and thereby turn on the MIL.
Small leaks in the exhaust system near the post catalyst
oxygen sensor can also cause the MIL to turn on.
Aftermarket electronics, such as cellular phones, stereos,
and anti–theft devices, may radiate electromagnetic inter-
ference (EMI) into the control system if they are improperly
installed. This may cause a false sensor reading and turn
on the MIL.
Environment
Temporary environmental conditions, such as localized
flooding, will have an effect on the vehicle ignition system.
If the ignition system is rain–soaked, it can temporarily
cause engine misfire and turn on the MIL.
Refueling
A new EOBD diagnostic checks the integrity of the entire
Evaporative (EVAP) Emission system. If the vehicle is re-
started after refueling and the fuel cap is not secured cor-
rectly, the on–board diagnostic system will sense this as
a system fault, turn on the MIL, and set DTC P0440.
Vehicle Marshaling
The transportation of new vehicles from the assembly
plant to the dealership can involve as many as 60 key
cycles within 2 to 3 miles of driving. This type of operation
contributes to the fuel fouling of the spark plugs and will
turn on the MIL with a set DTC P0300.
Poor Vehicle Maintenance
The sensitivity of EOBD diagnostics will cause the MIL to
turn on if the vehicle is not maintained properly. Restricted
air filters, fuel filters, and crankcase deposits due to lack
of oil changes or improper oil viscosity can trigger actual
vehicle faults that were not previously monitored prior to
EOBD. Poor vehicle maintenance can not be classified as
a ”non–vehicle fault,” but with the sensitivity of EOBD
diagnostics, vehicle maintenance schedules must be
more closely followed.
Severe Vibration
The Misfire diagnostic measures small changes in the
rotational speed of the crankshaft. Severe driveline vibra-
tions in the vehicle, such as caused by an excessive
amount of mud on the wheels, can have the same effect
on crankshaft speed as misfire and, therefore, may set
DTC P0300.
Related System Faults
Many of the EOBD system diagnostics will not run if the
engine controlmodule (ECM) detects a fault on a related
system or component. One example would be that if the
ECM detected a Misfire fault, the diagnostics on the cata-
lytic converter would be suspended until the Misfire fault
was repaired. If the Misfire fault is severe enough, the cat-
alytic converter can be damaged due to overheating andwill never set a Catalyst DTC until the Misfire fault is re-
paired and the Catalyst diagnostic is allowed to run to
completion. If this happens, the customer may have to
make two trips to the dealership in order to repair the ve-
hicle.
SERIAL DATA COMMUNICATIONS
Class II Serial Data Communications
Government regulations require that all vehicle manufac-
turers establish a common communication system. This
vehicle utilizes the ”Class II” communication system. Each
bit of information can have one of two lengths: long or
short. This allows vehicle wiring to be reduced by transmit-
ting and receiving multiple signals over a single wire. The
messages carried on Class II data streams are also priori-
tized. If two messages attempt to establish communica-
tions on the data line at the same time, only the message
with higher priority will continue. The device with the lower
priority message must wait. Themost significant result of
this regulation is that it provides scan tool manufacturers
with the capability to access data from any make or model
vehicle that is sold.
The data displayed on the other scan tool will appear the
same, with some exceptions. Some scan tools will only be
able to display certain vehicle parameters as values that
are a coded representation of the true or actual value. On
this vehicle the scan tool displays the actual values for ve-
hicle parameters. It will not be necessary to perform any
conversions from coded values to actual values.
ON–BOARD DIAGNOSTIC (EOBD)
On–Board Diagnostic Tests
A diagnostic test is a series of steps, the result of which is
a pass or fail reported to the diagnostic executive. When
a diagnostic test reports a pass result, the diagnostic
executive records the following data:
S The diagnostic test has been completed since the
last ignition cycle.
S The diagnostic test has passed during the current
ignition cycle.
S The fault identified by the diagnostic test is not cur-
rently active.
When a diagnostic test reports a fail result, the diagnostic
executive records the following data:
S The diagnostic test has been completed since the
last ignition cycle.
S The fault identified by the diagnostic test is current-
ly active.
S The fault has been active during this ignition cycle.
S The operating conditions at the time of the failure.
Remember, a fuel trim Diagnostic Trouble Code (DTC)
may be triggered by a list of vehicle faults. Make use of all
information available (other DTCs stored, rich or lean con-
dition, etc.) when diagnosing a fuel trim fault.

POSITION OF CONNECTORS AND GROUNDSW2–3
2) CONNECTOR INFORMATION
Connector
Number
Te r m i n a l
NumberColorConnecting Wiring
HarnessConnector Position
C10121 PinWhiteBody
Engine Fuse BlockEngine Fuse Block
C10211 P i nWhiteBody
Engine Fuse BlockEngine Fuse Block
C10310 PinWhiteEngine
Engine Fuse BlockEngine Fuse Block
C10424 PinWhiteFront
Engine Fuse BlockEngine Fuse Block
C1054 PinWhiteBody
Engine Fuse BlockEngine Fuse Block
C10620 PinWhiteEngine
Engine Fuse BlockEngine Fuse Block
C1072 PinWhiteABS
Engine Fuse BlockEngine Fuse Block
C10824 PinBlackBody
EngineLeft Engine Fuse Block
C1094 PinWhiteEngine
FrontUnder Engine Fuse Block
C11012 PinWhiteABS
BodyBelow Engine Fuse Block
C 1112 PinBlackABS
FrontBelow Engine Fuse Block
C1122 PinBlackFront – HornCenter Cross Member Panel
C11316 PinBlackBody
FrontBehind ECM Bracket
C20176 PinBlackI.P
I.P Fuse BlockI.P Fuse Block
C20289 PinWhiteI.P
BodyLeft CO–Driver Leg Room
C2048 PinWhiteRoof
Body (W/O Rain Sensor)Left CO–Driver Leg Room
C20414 PinWhiteRoof
Body(W/ Rain Sensor)Left CO–Driver Leg Room
C20622 PinWhiteI.P
TCMUpper Driver Leg Room
C2076 PinWhiteAir Bag
I.PUpper Left Driver Leg Room
C20815 PinWhiteI.P
FAT CBehind Glove Box
C20920 PinBlackFAT C
FAT C . A u xBetween Heater Core and
Evaporator Core
C2106 PinWhiteI.P
ConsoleBelow Console Box
C3018 PinWhiteAir Bag
BodyFront SDM
C3024 PinBlackRR. ABS
BodyCenter Rear Cross Member
C35133 PinGrayBody
Front Light DoorUnder CO–Driver A Pillar
C36133 PinGrayBody
Front Right DoorUnder Driver A Pillar
C37112 PinWhiteBody
Rear Light DoorUnder Left B Pillar
C38112 PinWhiteBody
Rear Right DoorUnder Right B Pillar
C401 (N/B)8 PinWhiteTrunk
BodyInside Right Trunk Side Cover
C401 (H/B)6 PinWhiteTrunk
BodyInside Right Trunk Side Cover
C4026 PinWhiteTrunk LID
BodyInside Right Trunk Side Cover
C4036 PinWhiteT/Gate. EXT. – BodyInside Left C Pillar
C4048 PinWhiteT/Gate. EXT. – BodyInside Left C Pillar
C4058 PinWhiteT/Gate. EXT. – T/GateBeside Left Rear Wiper Motor
C4066 PinWhiteT/Gate. EXT. – T/GateBeside Left Rear Wiper Motor
3) GROUND INFORMATION
Ground Number
Wiring HarnessGround Position
G101FrontBehind Left Head Lamp
G102FrontBehind Right Head Lamp
G103BatteryLeft Battery
G104EngineUnder Start Motor
G105BatteryUnder Start Motor
G106ABSBelow EBCM
G107Engine(MR–140/HV–240)Under Start Motor
G201I.PLeft I/P Fuse Block
G202Air BagBehind Left Audio Bracket
G203I.PBehind Left Audio Bracket
G205RoofUpper Driver Leg Room
G301BodyBelow Driver Cross Member Floor Panel
G302BodyBelow Left C Pillar
G303BodyBelow Left CO–Driver Leg Room
G401TrunkCenter Trunk Lower Back Panel
G402T/Gate. EXT.Inside Driver C Pillar
4) SPLICE PACK INFORMATION
Splice Pack Number
ColorWiring HarnessGround Position
S101BlackEngine(MR–140/HV–240)Upper Transmission
S202BlackI.PBehind Cluster
S203RedI.PBehind Audio Mounting
S204MagentaI.PBehind Audio Mounting
S205OrangeTCM (MR–140/HV–240)Upper Driver Leg Room
S301BlueBodyLeft CO–Driver Leg Room
S302BrownBodyLeft CO–Driver Leg Room

2C – 2IFRONT SUSPENSION
DAEWOO V–121 BL4
SPECIFICATIONS
GENERAL SPECIFICATIONS
ApplicationTrim Height
Center of Front Wheel to Bottom of Front Wheel Well368 mm (14.4 in.)
Center of Rear Wheel to Bottom of Rear Wheel Well367 mm (14.4 in.)
* CONDITION : Full Fuel in the Tank
FASTENER TIGHTENING SPECIFICATIONS
ApplicationNSmLb–FtLb–In
Ball Joint Pinch Bolt Nut6044–
Ball Joint–to–Control Arm Nuts10074–
Front Control Arm–to–Crossmember Bolt12592–
Rear Contral Arm–to–Crossmember Bolt11 081–
Crossmember Link–to–Crossmember Bolt11 484–
Crossmember Link–to–Transaxle Bracket Nut169125–
Drive Axle–to–Hub Caulking Nut300221–
Front Crossmember–to–Body Bolts13096–
Piston Rod Nut7555–
Rear Crossmember–to–Body Bolts196145–
Stabilizer Link–to–Strut Assembly Nut4735–
Stabilizer Shaft–to–Crossmember Clamp Bolts2518–
Stabilizer Shaft–to–Stabilizer Link Nut4735–
Steering Knuckle–to–Strut Assembly Nuts/Bolts12089–
Strut Assembly–to–Body Nut6548–

2C – 18IFRONT SUSPENSION
DAEWOO V–121 BL4
3. Connect the stabilizer shaft link to the strut assem-
bly by attaching the stabilizer link–to–strut assem-
bly nut.
Tighten
Tighten the stabilizer link–to–strut assembly nut to 47
NSm (35 lb–ft).
4. Install the brake line to the securing bracket on the
strut assembly.
5. On vehicles equipped with the ABS, connect the
ABS sensor line to the strut assembly.
6. Install the wheel. Refer to Section 2E, Tires and
Wheels.
7. Lower the vehicle.
8. Install the nuts securing the strut assembly to the
body of the vehicle.
Tighten
Tighten the strut assembly–to–body nuts to 65 NSm
(48 lb–ft).
CROSSMEMBER ASSEMBLY
Removal Procedure
1. Raise and suitably support the vehicle.
2. Remove the wheels. Refer to Section 2E, Tires and
Wheels.
3. Remove the nuts and bolts from the steering gear
mounting bracket.
4. Remove the return line bolt from the clip on the
crossmember.
5. Remove the exhaust pipe forward of the catalytic
converter. Refer to Section 1G, Engine Exhaust.
6. Disconnect the tie rod from the knuckle assembly.
Refer to Section 6C, Power Steering Gear.
7. Disconnect the ball joint from the knuckle assembly.
Refer to ”Knuckle Assembly” in this section.
8. Disconnect the stabilizer link from the strut assem-
bly. Refer to ”Stabilizer Link” in this section.
9. Remove the crossmember link–to–transaxle brack-
et nut.
1) Remove the right lower engine mount.
2) Remove the rear transmission mount bracket.

2C – 20IFRONT SUSPENSION
DAEWOO V–121 BL4
6. Install the crossmember link–to–transaxle bracket
nut.
Tighten
Tighten the crossmember link–to–transaxle bracket
nut to 169 NSm (125 lb–ft).
7. Connect the stabilizer link to the strut assembly.
Refer to ”Stabilizer Link” in this section.
8. Connect the ball joint to the knuckle assembly. Re-
fer to ”Knuckle Assembly” in this section.
9. Connect the tie rod from the knuckle assembly. Re-
fer to Section 6C, Power Steering Gear.
10. Install the exhaust pipe into the vehicle. Refer to
Section 1G, Engine Exhaust.
11. Install the wheels. Refer to Section 2E, Tires and
Wheels.
12. Lower the vehicle.

FRONT SUSPENSION 2C – 25
DAEWOO V–121 BL4
GENERAL DESCRIPTION
AND SYSTEM OPERATION
FRONT SUSPENSION
The front suspension for this vehicle is a combination of
a strut assembly and a knuckle assembly. The strut as-
sembly combines a strut dampener and spring mounted
to the body of the vehicle. The upper end of the strut is iso-
lated by a rubber mount and contains a bearing to allow the
strut to turn. The knuckle is attached to the strut assembly
and pivots on a ball joint bolted to the control arm. The con-
trol arms pivot from the body using rubber bushings.
The ball joint is fastened to the steering knuckle with a
pinch bolt and nut, and to the lower control arm with rivets.
The stabilizer bar interconnects both strut assemblies ofthe vehicle through the stabilizer link and is attached to the
front suspension crossmember. Jounce and rebound
movements affecting one wheel are partially transmitted
to the opposite wheel of the vehicle to stabilize body roll.
When servicing the control arm–to–body attachment and
the stabilizer shaft–to–body insulators, make sure the at-
taching bolts are loose until the control arms are moved to
the trim height, which is curb height. Trim height is the nor-
mal position to which the control arms move when the ve-
hicle is sitting on the ground. Refer to ”General Specifica-
tions” in this section.
The springs in the front suspension of engine family II are
stronger and the strut dampeners heavier than are the
springs and strut dampeners found in the front suspension
of engine family I.

SECTION : 3A
AUTOMATIC TRANSAXLE DRIVE AXLE
TABLE OF CONTENTS
SPECIFICATIONS3A–1 . . . . . . . . . . . . . . . . . . . . . . . . . .
Fastener Tightening Specifications 3A–1. . . . . . . . . .
SPECIAL TOOLS3A–2 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Special Tools Table 3A–2. . . . . . . . . . . . . . . . . . . . . . . .
COMPONENT LOCATOR3A–2 . . . . . . . . . . . . . . . . . . . .
Front Drive Axle 3A–2. . . . . . . . . . . . . . . . . . . . . . . . . .
MAINTENANCE AND REPAIR3A–4 . . . . . . . . . . . . . . . ON–VEHICLE SERVICE 3A–4. . . . . . . . . . . . . . . . . . . . .
Drive Axle Assembly 3A–4. . . . . . . . . . . . . . . . . . . . . . .
UNIT REPAIR 3A–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Outer Joint Seal 3A–7. . . . . . . . . . . . . . . . . . . . . . . . . .
Inner Tripot Seal 3A–8. . . . . . . . . . . . . . . . . . . . . . . . . .
GENERAL DESCRIPTION AND SYSTEM
OPERATION3A–10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Drive Axle 3A–10. . . . . . . . . . . . . . . . . . . . . . . . . .
SPECIFICATIONS
FASTENER TIGHTENING SPECIFICATIONS
ApplicationNSmLb–FtLb–In
Axle Shaft Caulking Nut300221–
Lower Ball Joint Pinch Bolt and Nut6044–
Tie Rod Nut5541–
Wheel Nuts10074–

3A – 2IAUTOMATIC TRANSAXLE DRIVE AXLE
DAEWOO V–121 BL4
SPECIAL TOOLS
SPECIAL TOOLS TABLE
J–8059
Snap Ring Pliers
KM–507–B
Ball Joint Remover
DW340–110
Axle Shaft Remover
J–35566
Seal Clamp Pliers
COMPONENT LOCATOR
FRONT DRIVE AXLE

AUTOMATIC TRANSAXLE DRIVE AXLE 3A – 3
DAEWOO V–121 BL4
1. C/V Joint Assembly
2. C/V Joint
3. Seal Retaining Clamp
4. Drive Axle Outboard Seal
5. Seal Retaining Clamp
6. Axle Shaft (Left–hand Drive Shown, Right–hand
Drive Similar)7. Seal Retaining Clamp
8. Drive Axle Inboard Seal
9. Seal Retaining Clamp
10. Tripot Housing
11. Snap Ring
12. Tripot Joint Assembly

3A – 4IAUTOMATIC TRANSAXLE DRIVE AXLE
DAEWOO V–121 BL4
MAINTENANCE AND REPAIR
ON–VEHICLE SERVICE
DRIVE AXLE ASSEMBLY
Tools Required
KM–507–B Ball Joint Separator
DW340–110 Axle Shaft Remover
Removal Procedure
1. Raise and suitably support the vehicle.
2. Remove the wheels. Refer to Section 2E, Tires
and Wheels.
3. Remove the axle shaft caulking nut. Discard the
nut.
Notice : Use only the recommended tool for separating
the lower ball joint. Failure to use the recommended tool
may cause damage to the ball joint and the seal.
4. Remove the lower ball joint pinch bolt and nut.
5. Separate the steering knuckle from the lower ball
joint using the ball joint separator KM–507–B.
6. Remove the tie rod nut.
Notice : Use only the recommended tool for separating
the tie rod from the knuckle/strut assembly. Failure to use
the recommended tool may cause damage to the knuckle/
strut assembly.
7. Separate the tie rod end using the ball joint separa-
tor KM–507–B.