2004 DAEWOO NUBIRA immobilizer

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TABLE OF CONTENTS
Section 0B General Information
Section 1 Engine
Section 1A General Engine Information
Section 1C1 1.4L/1.6L DOHC Engine Mechanical
Section 1C2 1.8L DOHC Engine Mechanical
Section 1D Engine Cooling
Section 1E Engine Electrical
Section 1F Engine Controls
Section 1G Engine Exhaust
Section 2 Suspension
Section 2A Suspension Diagnosis
Section 2B Wheel Alignment
Section 2C Front Suspension
Section 2D Rear Suspension
Section 2E Tires and Wheels
Section 3 Driveline/Axle
Section 3A Automatic Transaxle Drive Axle
Section 3B Manual Transaxle Drive Axle
Section 4 Brakes
Section 4A Hydraulic Brakes
Section 4B Master Cylinder
Section 4C Power Booster
Section 4D Front Disc Brakes
Section 4E1 Rear Disc Brakes
Section 4E2 Rear Drum Brakes
Section 4F Antilock Brake System
Section 4G Parking Brake
Section 5 Transmission/Transaxle
Section 5A1 ZF 4HP16 Automatic Transaxle
Section 5A2 AISIN Automatic Transaxle
Section 5B Five-Speed Manual Transaxle
Section 5C Clutch
Section 6 Steering
Section 6A Power Steering System
Section 6B Power Steering PumpSection 6C Power Steering Gear
Section 6E Steering Wheel and Column
Section 7 Heating, Ventilation, and Air
Conditioning (HVAC)
Section 7A Heating and Ventilation System
Section 7B Manual Control Heating, Ventilation,
and Air Conditioning System
Section 7D Automatic Temperature Control HVAC
Section 8 Restraints
Section 8A Seat Belts
Section 8B Supplemental Inflatable Restraints
(SIR)
Section 9 Body and Accessories
Section 9A Body Wiring System
Section 9B Lighting Systems
Section 9C Horns
Section 9D Wipers/Washer Systems
Section 9E Instrumentation/Driver Information
Section 9F Audio Systems
Section 9G Interior Trim
Section 9H Seats
Section 9I Waterleaks
Section 9J Windnoise
Section 9K Squeaks and Rattles
Section 9L Glass and Mirrors
Section 9M Exterior Trim
Section 9N Frame and Underbody
Section 9O Bumpers and Fascias
Section 9P Doors
Section 9Q Roof
Section 9R Body Front End
Section 9S Body Rear End
Section 9T1 Remote Keyless Entry and Anti–Theft
System
Section 9T2 Immobilizer Anti–Theft System

ENGINE CONTROLS 1F – 3
DAEWOO V–121 BL4
DTC P0562 System Voltage(Engine Side) Too
Low 1F–270. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P0563 System Voltage(Engine Side) Too
High 1F–272. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P0601 Engine Control Module Checksum
Error 1F–274. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P0604 Engine Control Module Internal/External
RAM Error 1F–275. . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P0605 Engine Control Module INMVY Write
Error 1F–276. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P0656 Fuel Level Gauge Circuit Fault 1F–277. .
DTC P1181 Variable Intake Manifold Solenoid
Low Voltage 1F–279. . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P1182 Variable Intake Manifold Solenoid
High Voltage 1F–281. . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P1230 Fuel Pump Relay Low Voltage
(1.4L DOHC) 1F–283. . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P1230 Fuel Pump Relay Low Voltage
(1.6L DOHC) 1F–286. . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P1231 Fuel Pump Relay High Voltage
(1.4L DOHC) 1F–289. . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P1231 Fuel Pump Relay High Voltage
(1.6L DOHC) 1F–292. . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P1320 Crankshaft Segment Period
Segment Adaptation At Limit 1F–295. . . . . . . . . . . .
DTC P1321 Crankshaft Segment Period Tooth
Error 1F–297. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P1382 Rough Road Data Invalid
(NON ABS) 1F–299. . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P1382 Rough Road Data Invalid (ABS) 1F–302
DTC P1385 Rough Road Sensor Circuit Fault
(NON ABS) 1F–305. . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P1402 Exhaust Gas Recirculation
Blocked 1F–308. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P1403 Exhaust Gas Recirculation Valve
Failure 1F–310. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P1404 Exhaust Gas Recirculation Closed1F–313
DTC P1511 Idle Charge Actuator Circuit Fault 1F–316
DTC P1512 Idle Charge Actuator Mechanical
Error 1F–319. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P1513 Idle Charge Actuator Functional
Error 1F–321. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P1537 A/C Compressor Relay High
Voltage 1F–324. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P1538 A/C Compressor Relay Low
Voltage 1F–326. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P1610 Main Relay High Voltage
(1.4L DOCH) 1F–328. . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P1610 Main Relay High Voltage
(1.6L DOHC) 1F–330. . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P1611 Main Relay Low Voltage
(1.4L DOHC) 1F–332. . . . . . . . . . . . . . . . . . . . . . . . . . DTC P1611 Main Relay Low Voltage
(1.6L DOHC) 1F–334. . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P1628 Immobilizer No Successful
Communication 1F–336. . . . . . . . . . . . . . . . . . . . . . . .
DTC P1629 Immobilizer Wrong Computation 1F–338
DTC P1660 Malfunction Indicator Lamp (MIL)
High Voltage 1F–340. . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P1661 Malfunction Indicator Lamp (MIL)
Low Voltage 1F–342. . . . . . . . . . . . . . . . . . . . . . . . . . .
TROUBLE CODE DIAGNOSIS (1.8L DOHC) 1F–344.
Clearing Trouble Codes 1F–344. . . . . . . . . . . . . . . . . . .
Diagnostic Trouble Codes (1.8L DOHC) 1F–344. . . .
DTC P0106 Manifold Absolute Pressure
Rationality 1F–347. . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P0107 Manifold Absolut Pressure Low
Voltage 1F–349. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P0108 Manifold Absolut Pressure High
Voltage 1F–352. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P0112 Intake Air Temperature Low
Voltage 1F–355. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P0113 Intake Air Temperature High
Voltage 1F–358. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P0117 Engine Coolant Temperature Low
Voltage 1F–361. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P0118 Engine Coolant Temperature High
Voltage 1F–363. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P0122 Throttle Position Sensor Low
Voltage 1F–366. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P0123 Throttle Position Sensor High
Voltage 1F–369. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P0131 Front Heated Oxygen Sensor
(HO2S1) Low Voltage 1F–372. . . . . . . . . . . . . . . . . .
DTC P0132 Front Heated Oxygen Sensor
(HO2S1) High Voltage 1F–375. . . . . . . . . . . . . . . . . .
DTC P0133 Front Heated Oxygen Sensor
(HO2S1) Slow Response 1F–378. . . . . . . . . . . . . . .
DTC P0134 Front Heated Oxygen Sensor
(HO2S1) No Activity or Open 1F–382. . . . . . . . . . . .
DTC P0135 Front Heated Oxygen Sensor
(HO2S1) Heater Circuit Not Functioning 1F–385. . .
DTC P0137 Rear Heated Oxygen Sensor
(HO2S2) Low Voltage 1F–388. . . . . . . . . . . . . . . . . .
DTC P0138 Rear Heated Oxygen Sensor
(HO2S2) High Voltage 1F–391. . . . . . . . . . . . . . . . . .
DTC P0140 Rear Heated Oxygen Sensor
(HO2S2) No Activity or Open 1F–394. . . . . . . . . . . .
DTC P0141 Rear Heated Oxygen Sensor
(HO2S2) Heater Circuit Not Functioning 1F–397. . .
DTC P0171 Fuel Trim System Too Lean 1F–400. . . .
DTC P0172 Fuel Trim System Too Rich 1F–404. . . . .
DTC P0201 Injector 1 Circuit Fault 1F–408. . . . . . . . .
DTC P0202 Injector 2 Circuit Fault 1F–411. . . . . . . . .

1F – 4IENGINE CONTROLS
DAEWOO V–121 BL4
DTC P0203 Injector 3 Circuit Fault 1F–414. . . . . . . . .
DTC P0204 Injector 4 Circuit Fault 1F–417. . . . . . . . .
DTC P0300 Multiple Cylinder Misfire Detected 1F–421
DTC P0301 Cylinder 1 Misfire 1F–426. . . . . . . . . . . . .
DTC P0302 Cylinder 2 Misfire 1F–431. . . . . . . . . . . . .
DTC P0303 Cylinder 3 Misfire 1F–436. . . . . . . . . . . . .
DTC P0304 Cylinder 4 Misfire 1F–441. . . . . . . . . . . . .
DTC P0317 Rough Road Sensor Source Not
Detected 1F–445. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P0325 Knock Sensor Internal
Malfunction 1F–447. . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P0327 Knock Sensor Circuit Fault 1F–449. . . . .
DTC P0336 58X Crank Position Extra/Missing
Pulses 1F–452. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P0337 58X Crank Position Sensor No
Signal 1F–455. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P0341 Camshaft Position Sensor
Rationality 1F–458. . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P0342 Camshaft Position Sensor No
Signal 1F–461. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P0351 Ignition Control Circuit A Fault
(Cylinder 1 and 4) 1F–464. . . . . . . . . . . . . . . . . . . . . .
DTC P0352 Ignition Control Circuit B Fault
(Cylinder 2 and 3) 1F–466. . . . . . . . . . . . . . . . . . . . . .
DTC P0401 Exhaust Gas Recirculation Insufficient
Flow 1F–468. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P0402 Exhaust Gas Recirculation Excessive
Flow 1F–470. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P0404 Exhaust Gas Recirculation Open
Valve Position Error 1F–474. . . . . . . . . . . . . . . . . . . .
DTC P0405 Exhaust Gas Recirculation Pintle
Position Low Voltage 1F–478. . . . . . . . . . . . . . . . . . .
DTC P0406 Exhaust Gas Recirculation Pintle
Position High Voltage 1F–481. . . . . . . . . . . . . . . . . . .
DTC P0420 Catalyst Oxygen Sensor Low
Efficiency 1F–484. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P0443 Evaporative Emission System Purge
Solenoid Control Circuit 1F–486. . . . . . . . . . . . . . . . .
DTC P0461 Fuel Level Struck 1F–489. . . . . . . . . . . . .
DTC P0462 Fuel Level Low Voltage 1F–492. . . . . . . .
DTC P0463 Fuel Level High Voltage 1F–495. . . . . . .
DTC P0502 Vehicle Speed Sensor No Signal
(Engine Side) 1F–498. . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P0506 Idle Speed RPM Lower Than Desired
Idle Speed 1F–501. . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P0507 Idle Speed RPM Higher Than Desired
Idle Speed 1F–504. . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P0532 A/C Pressure Sensor Low Voltage 1F–507
DTC P0533 A/C Pressure Sensor High
Voltage 1F–510. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DTC P0562 System Voltage Too Low
(Engine Side) 1F–513. . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P0563 System Voltage Too High
(Engine Side) 1F–515. . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P0601 ECM Checksum Fault
(Engine Side) 1F–517. . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P0602 ECM Reprogrom Error 1F–518. . . . . . . .
DTC P0607 Lower Power Counter Error 1F–519. . . .
DTC P0700 Transaxle Control Module
Malfunction 1F–520. . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P1106 Manifold Abosolute Pressure
Intermittent High Voltage 1F–522. . . . . . . . . . . . . . . .
DTC P1107 Manifold Abosolute Pressure
Intermittent Low Voltage 1F–524. . . . . . . . . . . . . . . .
DTC P1111 Intake Air Temperature Intermittent
High Voltage 1F–526. . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P1112 Intake Air Temperature Intermittent
Low Voltage 1F–529. . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P1114 Engine Coolant Temperature
Intermittent Low Voltage 1F–531. . . . . . . . . . . . . . . .
DTC P1115 Engine Coolant Temperature
Intermittent High Voltage 1F–533. . . . . . . . . . . . . . . .
DTC P1121 Throttle Position Sensor Intermittent
High Voltage 1F–535. . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P1122 Throttle Position Sensor Intermittent
Low Voltage 1F–537. . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P1133 Front Heated Oxyzen Sensor
(HO2S1) Too Few Transitions 1F–539. . . . . . . . . . .
DTC P1134 Front Heated Oxyzen Sensor
(HO2S1) Transitions Ratio 1F–543. . . . . . . . . . . . . .
DTC P1167 Front Heated Oxyzen Sensor
(HO2S1) Rich in Decel Fuel Cutoff (DFCO) 1F–546
DTC P1171 Fuel Trim System Lean During Power
Enrichment 1F–548. . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P1336 58X Crank Position Tooth Error Not
Learned 1F–550. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P1391 G Sensor Rough Road Rationality 1F–552
DTC P1392 G Sensor Rough Low Voltage 1F–555. .
DTC P1393 G Sensor Rough High Voltage 1F–558. .
DTC P1396 ABS WSS Signal Variation 1F–561. . . . .
DTC P1397 ABS WSS No Signal 1F–563. . . . . . . . . .
DTC P1404 Exhaust Gas Recirculation Closed
Valve Pintle Error 1F–565. . . . . . . . . . . . . . . . . . . . . .
DTC P1601 SPI Communications Between
ECM and TCM 1F–568. . . . . . . . . . . . . . . . . . . . . . . .
DTC P1607 Lower Power Counter Reset 1F–569. . .
DTC P1626 Immobilizer No Response 1F–570. . . . . .
DTC P1631 Immobilizer Invalid Response 1F–571. .
DTC P1650 SPI Communications Between Error
with SIDM Chip 1F–572. . . . . . . . . . . . . . . . . . . . . . . .
DTC P1655 SPI Communications Between Error
with PSVI Chip 1F–573. . . . . . . . . . . . . . . . . . . . . . . .

ENGINE CONTROLS 1F – 113
DAEWOO V–121 BL4
DTCIlluminate MIL Error
Type Function
P1321Crankshaft Segment Period Tooth ErrorEYES
P1382Rough Road Data Invalid (Non ABS)CnlNO
P1382Rrough Road Data Invalid (ABS)CnlNO
P1385Rough Road Sensor Circuit Fault (Non ABS)CnlNO
P1402Exhaust Gas Recirculation BlockedEYES
P1403Exhaust Gas Recirculation Valve FailureEYES
P1404Exhaust Gas Recirculation (EGR) ClosedEYES
P1511Idle Charge Actuactor Circuit FaultEYES
P1512Idle Charge Actuactor Mechanical ErrorEYES
P1513Idle Charge Actuactor Functionnal ErrorCnlNO
P1537A/C Compressor Relay High VoltageCnlNO
P1538A/C Compressor Relay Low VoltageCnlNO
P1610Main Relay High Voltage (1.4L DOHC)CnlNO
P1610Main Relay High Voltage (1.6L DOHC)AYES
P1611Main Relay Low Voltage (1.4L DOHC)CnlNO
P1611Main Relay Low Voltage (1.6L DOHC)AYES
P1628Immobilizer No Successful CommunicationCnlNO
P1629Immobilizer Wrong ComputationCnlNO
P1660Malfunction Indicator Lamp(MIL) High VoltageEYES
P1661Malfunction Indicator Lamp(MIL) Low VoltageEYES

1F – 336IENGINE CONTROLS
DAEWOO V–121 BL4
DIAGNOSTIC TROUBLE CODE (DTC) P1628
IMMOBILIZER NO SUCCESSFUL COMMUNICATION
Circuit Description
When the ignition switch is turned to ON, the key tested
by immobilizer anti–theft system. While the key code is be-
ing read by immobilizer control unit or integrated anti–theft
control unit, the engine can start run with any key that will
turn the lock cylinder. the key code is read and compared
with key codes that have been stored in the memory of the
immobilizer control unit. If a valid key is detected, the im-
mobilizer control unit sends a serial data release message
to the Engine Control Module (ECM). Included in the re-
lease message is an identification (ID) code which as-
sures that neither the immobilizer control unit nor the ECM
have been substituted to defeat the system. If the ECM re-
ceives an invalid release message, the ECM performs the
following action:
S Disable the fuel injector circuit.
S Disable the fuel pump circuit.
S Disable the ignition coil.
S A Diagnostic Trouble Code (DTC) will stored if de-
tect communication link failure between the ECM
and immobilizer control unit.Conditions for Setting the DTC
S No safety security strategy allowed.
S Time–out delay has elapsed without successful
communication or a transmission key ON/OFF oc-
curred before a successful communication.
Action Taken When the DTC Sets
S The Malfunction Indicator Lamp (MIL) will not illumi-
nate.
S The ECM will store conditions which were present
when the DTC was set as Failure Records data
only.
S This information will not be stored in the Freeze
Frame data.
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.

ENGINE CONTROLS 1F – 337
DAEWOO V–121 BL4
DTC P1628 – Immobilizer No Successful Communication
StepActionValue(s)YesNo
1Perform an On–Board Diagnostic (EOBD) System
Check.
Is the system check complete?–Go to Step 2Go to
”On–Board
Diagnostic Sys-
tem Check”
21. Turn the ignition OFF.
2. Install a scan too to the Data Link Connector
(DLC).
3. Turn the ignition ON.
4. Select IMMOBILIZER DIAGNOSIS STATUS
from the scan tool menu.
Is the communication established between the scan
tool and the immobilizer control unit?–Go to Step 3Go to
Section 9T, Im-
mobillzer Anti–
Theft System
31. Turn the ignition OFF.
2. Disconnect the Immobilizer Control Unit and
Engine Control Module (ECM) connectors.
3. Measure the resistance between terminal 7 of
immoblizer control unit and terminal 56 of the
ECM.
Is the resistance within the specified value?0WGo to Step 5Go to Step 4
4Repair an open circuit between terminal 7 of immobi-
lizer control unit and terminal 56 of the ECM.
Is the repair complete?–Go to Step 8–
5Check the terminals in immobilizer control unit and
the ECM for damages and repair as needed.
Is the repair complete?–Go to Step 8Go to Step 6
6Replace the immobilizer control unit.
Is the repair complete?–Go to Step 8Go to Step 7
71. Turn the ignition OFF.
2. Replace the ECM.
Is the repair complete?–Go to Step 8–
81. 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 9Go to Step 2
9Check if any additional DTCs are set.
Are any DTCs displayed that have not been diag-
nosed?–Go to
applicable DTC
tableSystem OK

1F – 338IENGINE CONTROLS
DAEWOO V–121 BL4
DIAGNOSTIC TROUBLE CODE (DTC) P1629
IMMOBILIZER WRONG COMPUTATION
Circuit Description
When the ignition switch is turned to ON, the key tested
by immobilizer anti–theft system. While the key code is be-
ing read by immobilizer control unit or integrated anti–theft
control unit, the engine can start run with any key that will
turn the lock cylinder. the key code is read and compared
with key codes that have been stored in the memory of the
immobilizer control unit. If a valid key is detected, the im-
mobilizer control unit sends a serial data release message
to the Engine Control Module (ECM). Included in the re-
lease message is an identification (ID) code which as-
sures that neither the immobilizer control unit nor the ECM
have been substituted to defeat the system. If the ECM re-
ceives an invalid release message, the ECM performs the
following action:
S Disable the fuel injector circuit.
S Disable the fuel pump circuit.
S Disable the ignition coil.A Diagnostic Trouble Code (DTC) will stored if detect com-
munication link failure between the ECM and immobilizer
control unit.
Conditions for Setting the DTC
S Wrong coded value from ICU.
Action Taken When the DTC Sets
S The Malfunction Indicator Lamp (MIL) will not illumi-
nate.
S The ECM will store conditions which were present
when the DTC was set as Failure Records data
only.
S This information will not be stored in the Freeze
Frame data.
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.

ENGINE CONTROLS 1F – 339
DAEWOO V–121 BL4
DTC P1629 – Immobilizer Wrong Computation
StepActionValue(s)YesNo
1Perform an On–Board Diagnostic (EOBD) System
Check.
Is the system check complete?–Go to Step 2Go to
”On–Board
Diagnostic Sys-
tem Check”
21. Turn the ignition OFF.
2. Install a scan too to the Data Link Connector
(DLC).
3. Turn the ignition ON.
4. Select IMMOBILIZER DIAGNOSIS STATUS
from the scan tool menu.
Is the communication established between the scan
tool and the immobilizer control unit?–Go to Step 3Go to
Section 9T, Im-
mobillzer Anti–
Theft System
31. Turn the ignition OFF.
2. Disconnect the Immobilizer Control Unit and
Engine Control Module (ECM) connectors.
3. Measure the resistance between terminal 7 of
immoblizer control unit and terminal 56 of the
ECM.
Is the resistance within the specified value?0WGo to Step 5Go to Step 4
4Repair an open circuit between terminal 7 of immobi-
lizer control unit and terminal 56 of the ECM.
Is the repair complete?–Go to Step 8–
5Check the terminals in immobilizer control unit and
the ECM for damages and repair as needed.
Is the repair complete?–Go to Step 8Go to Step 6
6Replace the immobilizer control unit.
Is the repair complete?–Go to Step 8Go to Step 7
71. Turn the ignition OFF.
2. Replace the ECM.
Is the repair complete?–Go to Step 8–
81. 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 9Go to Step 2
9Check if any additional DTCs are set.
Are any DTCs displayed that have not been diag-
nosed?–Go to
applicable DTC
tableSystem OK