immobilizer DAEWOO LACETTI 2004 Service User Guide

ENGINE CONTROLS 1F – 571
DAEWOO V–121 BL4
DIAGNOSTIC TROUBLE CODE (DTC) P1631
IMMOBILIZER INVALID RESPONSE
Circuit Description
The Engine Control Module (ECM) is the control center of
the fuel injection system. It constantly looks at the informa-
tion from various sensors, and controls the systems that
affect vehicle performance. The ECM also performs the
diagnostic function of the system. It can recognize opera-
tional problems, alert the driver through the Malfunction In-
dicator Lamp (MIL) (Check Engine), and store a Diagnos-
tic Trouble Code (DTC) or DTCs which identify the
problem areas to aid the technician in making repairs. The
ECM received incorrect message identification.
Conditions for Setting the DTC
S Wrong immobilizer message received.
S Ignition switch is turned to ON.
S Immobilizer option selected.S ECM release time window expired.
Action Taken When the DTC Sets
S The Malfunction Indicator Lamp (MIL) will not illumi-
nate.
S The ECM will record operating conditions at the
time the diagnostic fails. This information will be
stored in the Failure Records buffers.
S A history DTC is stored.
Conditions for Clearing the MIL/DTC
S A history DTC will clear after 40 consecutive warm–
up cycles without a fault.
S DTC(s) can be cleared by using the scan tool.
S Disconnecting the ECM battery feed for more than
10 seconds.
DTC P1631 – Immobilizer Invalid Response
StepActionValue(s)YesNo
1Perform an On–Board Diagnostic (EOBD) System
Check.
Was the check performed?–Go to Step 2Go to
”On–Board
Diagnostic Sys-
tem Check”
21. Turn the ignition OFF.
2. Replace the Engine Control Module (ECM).
Is the repair complete?–Go to Step 3–
31. Using the scan tool, clear the Diagnostic
Trouble Codes (DTCs).
2. Start the engine and idle at normal operating
temperature.
3. Operate the vehicle within the Conditions for
setting this DTC as specified in the supporting
text.
Does the scan tool indicate that this diagnostic has
run and passed?–Go to Step 4Go to Step 2
4Check if any additional DTCs are set.
Are any DTCs displayed that have not been diag-
nosed?–Go to
Applicable DTC
tableSystem OK

USAGE AND CAPACITY OF FUSES IN FUSE BLOCKW4–3
2. I.P FUSE BLOCK
1) POSITION OF FUSE AND RELAY
2) USAGE OF FUSE IN I.P FUSE BLOCK
Power
Supply
ClassificationFuse
NoCapacityUsage
IGN1 (15)Blade TypeF110ASDM
FuseF210ATCM, ECM, Generator, VGIS,VSS
F315AHazard Switch
F410ACluster, Chime Bell, Brake Switch, SSPS Module,
A/C Control Switch
–F5––
IGN2 (15A)F610AA/C Comp. Relay, Defog Relay, Power Window
Relay, Head Lamp Relay
F720ABlower Relay, A/C Control Switch, FATC
F815AElectric Mirror Switch, Folding Mirror, Sun Roof
Module
IGN1 (15)F925AWiper Motor, Wiper Switch
–F10––
IGN1 (15)F1110AEBCM, Oil Feeding Connector
F1210AImmobilizer, Anti Theft Control Unit, Rain Sensor
Unit
30 BAT(+)F1310ATCM
F1415AHazard Switch
F1515AAnti Theft Control Unit
F1610ADLC
ACC (15C)F1710AAudio, Clock
F1815AExtra Power Jack
F1915ACigar Lighter
IGN1 (15)F2010AReverse Lamp Switch, PNP Switch
30 BAT(+)F2115ARear Fog Relay
F2215AClock, FATC, A/C Control Switch
F2315AAudio
F2410AImmobilizer

SECTION 5
ELECTRICAL WIRING DIAGRAMS
CONTENTS
1. STARTING & CHARGING SYSTEM5–8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1) BATTERY, IGNITION SWITCH, STARTER MOTOR, GENERATOR & PNP SWITCH CIRCUIT 5–8. . . . . . . . . .
2. ECM (ENGINE CONTROL MODULE) : MR–140 5–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1) BATTERY POWER SUPPLY, GROUND, EI SYSTEM & CKP SENSOR CIRCUIT 5–10. . . . . . . . . . . . . . . . . . . . .
2) FUEL PUMP, INJECTOR & HEATED O2 SENSOR CIRCUIT 5–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3) IAC, SENSOR(MAP, ECT, TP, KNOCK, ACP & ROUGH ROAD) & LEGR CIRCUIT 5–14. . . . . . . . . . . . . . . . . . .
4) EVAP CANISTER PURGE SOLENOID, CMP SENSOR, CLUSTER & VSS CIRCUIT 5–16. . . . . . . . . . . . . . . . .
5) CLUSTER, FUEL PUMP & TCM CIRCUIT 5–18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6) DLC, MIL LAMP & IMMOBILIZER CONTROL CIRCUIT 5–20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3. ECM (ENGINE CONTROL MODULE) : HV–240 5–22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1) BATTERY POWER SUPPLY, GROUND, EI SYSTEM & CKP SENSOR CIRCUIT 5–22. . . . . . . . . . . . . . . . . . . . .
2) FUEL PUMP, INJECTOR & O2 SENSOR CIRCUIT 5–24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3) IAC, SENSOR(MAP, ECT, TP, IAT, KNOCK & ACP) & EGR VALVE CIRCUIT 5–26. . . . . . . . . . . . . . . . . . . . . . . .
4) EVAP CANISTER PURGE SOLENOID, CMP SENSOR, CLUSTER & VSS CIRCUIT 5–28. . . . . . . . . . . . . . . . .
5) CLUSTER, FUEL PUMP & TCM CIRCUIT 5–30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6) DLC, MIL LAMP, IMMOBILIZER CONTROL & RON SWITCH CIRCUIT 5–32. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ELECTRICAL WIRING DIAGRAMSW5–3
4. ECM (ENGINE CONTROL MODULE) : SIRIUS D4 5–34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1) BATTERY POWER SUPPLY, GROUND, EI SYSTEM & CKP SENSOR CIRCUIT 5–34. . . . . . . . . . . . . . . . . . . . .
2) FUEL PUMP, INJECTOR, FUEL CONNECTOR & CMP SENSOR CIRCUIT 5–36. . . . . . . . . . . . . . . . . . . . . . . . .
3) MTIA, SENSOR(ECT, KNOCK, IAT, MAP, ACP & HO2S) & POWER STEERING PRESSURE SWITCH
CIRCUIT : EOBD5–38 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4) MTIA, SENSOR(ECT, KNOCK, IAT, MAP, ACP & O2) & POWER STEERING PRESSURE SWITCH
CIRCUIT : NON EOBD5–40 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5) EEGR VALVE, VR SENSOR, CLUSTER & FUEL PUMP CIRCUIT : EOBD 5–42. . . . . . . . . . . . . . . . . . . . . . . . . .
6) EGR VALVE, CLUSTER & FUEL PUMP CIRCUIT: NON EOBD 5–44. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7) EVAP CANISTER PURGE SOLENOID, VGIS, CLUSTER, VSS, TCM & RON SWITCH CIRCUIT 5–46. . . . . . .
8) DLC, MIL LAMP & IMMOBILIZER CONTROL CIRCUIT 5–48. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5. TCM (TRANSMISSION CONTROL MODULE) : MR–140/HV–240 5–50. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1) POWER SUPPLY, GROUND, PNP SWITCH, BRAKE SWITCH & SOLENOID VALVE CIRCUIT 5–50. . . . . . . .
2) SENSOR(INPUT SPEED,OUTPUT SPEED, TRANSMISSION FLUID TEMP.), CLUSTER, DLC, ECM &
HOLD MODE SWITCH CIRCUIT5–52 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3) PNP SWITCH & CLUSTER CIRCUIT 5–54. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6. TCM (TRANSMISSION CONTROL MODULE) : SIRIUS D4 5–56. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1) POWER SUPPLY, GROUND, PNP SWITCH, CLUSTER & ECM CIRCUIT : NOTCH BACK 5–56. . . . . . . . . . . .
2) POWER SUPPLY, GROUND, PNP SWITCH, CLUSTER & ECM CIRCUIT : HATCH BACK 5–58. . . . . . . . . . . .
3) BRAKE SWITCH, BTSI SOLENOID, ISS SENSOR & TRANSAXLE CIRCUIT 5–60. . . . . . . . . . . . . . . . . . . . . . . .
4) HOLD MODE SWITCH, VSS & DLC CIRCUIT 5–62. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7. AIR CONDITIONER5–64 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1) AIR CONDITIONER CONTROL SWITCH, BLOWER MOTOR RESISTER & BLOWER MOTOR
CIRCUIT5–64 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2) AIR CONDITIONER CONTROL, INTAKE MOTOR SWITCH & AIR CONDITIONER COMPRESSOR
CIRCUIT5–66 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ELECTRICAL WIRING DIAGRAMSW5–7
29. SUN ROOF CIRCUIT5–180 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
30. SSPS(SPEED SENSITIVE POWER STEERING) CIRCUIT 5–182. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
31. IMMOBILIZER SYSTEM CIRCUIT5–184 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
32. ANTI THEFT CONTROL SYSTEM CIRCUIT 5–186. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1) NOTCH BACK5–186 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2) HATCH BACK5–188 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5–20WELECTRICAL WIRING DIAGRAMS
6) DLC, MIL LAMP & IMMOBILIZER CONTROL CIRCUITa. CONNECTOR INFORMATION
CONNECTOR(NO.)
(PIN NO. COLOR)
CONNECTING, WIRING HARNESSCONNECTOR POSITION
C105 (4 Pin, White)Body
Engine Fuse BlockEngine Fuse Block
C108 (24 Pin, Black)Body
EngineLeft Engine Fuse Block
C110 (12 Pin, White)ABS
BodyBelow Engine Fuse Block
C201 (76 Pin, Black)I.P
I.P Fuse BlockI.P Fuse Block
C202 (89 Pin, White)I.P
BodyLeft CO–Driver Leg Room
C206 (22 Pin, White)I.P
TCMUpper Driver Leg Room
C207 (6 Pin, White)Air Bag
I.PUpper Left Driver Leg Room
G201I.PLeft I.P Fuse Block
b. CONNECTOR IDENTIFICATION SYMBOL & PIN NUMBER POSITION
J3B1P007

5–32WELECTRICAL WIRING DIAGRAMS
6) DLC, MIL LAMP IMMOBILIZER & RON SWITCH CIRCUITa. CONNECTOR INFORMATION
CONNECTOR(NO.)
(PIN NO. COLOR)
CONNECTING, WIRING HARNESSCONNECTOR POSITION
C105 (4 Pin, White)Body
Engine Fuse BlockEngine Fuse Block
C108 (24 Pin, Black)Body
EngineLeft Engine Fuse Block
C110 (12 Pin, White)ABS
BodyBelow Engine Fuse Block
C201 (76 Pin, Black)I.P
I.P Fuse BlockI.P Fuse Block
C202 (89 Pin, White)I.P
BodyLeft CO–Driver Leg Room
C206 (22 Pin, White)I.P
TCMUpper Driver Leg Room
C207 (6 Pin, White)Air Bag
I.PUpper Left Driver Leg Room
G104EngineUnder Start Motor
G201I.PLeft I.P Fuse Block
b. CONNECTOR IDENTIFICATION SYMBOL & PIN NUMBER POSITION
J3B1P013

5–48WELECTRICAL WIRING DIAGRAMS
8) DLC, MIL LAMP & IMMOBILIZER CONTROL CIRCUITa. CONNECTOR INFORMATION
CONNECTOR(NO.)
(PIN NO. COLOR)
CONNECTING, WIRING HARNESSCONNECTOR POSITION
C105 (4 Pin, White)Body
Engine Fuse BlockEngine Fuse Block
C108 (24 Pin, Black)Body
EngineLeft Engine Fuse Block
C110 (12 Pin, White)ABS
BodyBelow Engine Fuse Block
C201 (76 Pin, Black)I.P
I.P Fuse BlockI.P Fuse Block
C202 (89 Pin, White)I.P
BodyLeft CO–Driver Leg Room
C206 (22 Pin, White)I.P
TCMUpper Driver Leg Room
C207 (6 Pin, White)Air Bag
I.PUpper Left Driver Leg Room
G201I.PLeft I.P Fuse Block
b. CONNECTOR IDENTIFICATION SYMBOL & PIN NUMBER POSITION
J3B1P021

5–184WELECTRICAL WIRING DIAGRAMS
31. IMMOBILIZER SYSTEM CIRCUITa. CONNECTOR INFORMATION
CONNECTOR(NO.)
(PIN NO. COLOR)
CONNECTING, WIRING HARNESSCONNECTOR POSITION
C102 (11 Pin, White)Body
Engine Fuse BlockEngine Fuse Block
C105 (4 Pin, White)Body
Engine Fuse BlockEngine Fuse Block
C108 (24 Pin, Black)Body
EngineLeft Engine Fuse Block
C201 (76 Pin, Black)I.P
I.P Fuse BlockI.P Fuse Block
C202 (89 Pin, White)I.P
BodyLeft CO–Driver Leg Room
C361 (33 Pin, Gray)Body
Front Light DoorUnder CO–Driver A Pillar
S203 (Red)I.PBehind Audio Mounting
G203I.PBehind Left Audio Bracket
b. CONNECTOR IDENTIFICATION SYMBOL & PIN NUMBER POSITION
J3B1P071

6E – 14ISTEERING WHEEL AND COLUMN
DAEWOO V–121 BL4
4. With the key in the ignition turned to the position
designated ACC, remove the lock cylinder by
pressing down the detent spring and pulling the
lock cylinder out of the switch cylinder housing.
5. Remove the ignition switch retaining screw.
6. Disconnect the wiring and remove the ignition
switch.
Installation Procedure
1. Install the ignition switch with the ignition switch
retaining screw.
Tighten
Tighten the ignition switch retaining screw to 2.5 NSm
(22 lb–in).
2. Connect the wiring to the ignition switch.
3. Install the lock cylinder.
4. Connect the electrical connector for the immobilizer
detection unit.
5. Install the upper and the lower steering column cov-
er panel with the screws.
Tighten
Tighten the upper and the lower steering column cov-
er panel screws to 2.5 NSm (22 lb–in).
6. Connect the negative battery cable.