Associated Equipment GM LS1 Informations techniques

HOLDENGEN III V8 ENGINE MANAGEMENT

GEN III V8 ENGINE MANAGEMENTPCM Five Volt Reference CircuitsThe PCM has two five volt reference circuits The five volt reference circuit number one su

GEN III V8 ENGINE MANAGEMENTHOLOENSequential Fuel Injection ModeWhen the engine is first cranked over, all injectorswill be energised simultaneously.

GEN III V8 ENGINE MANAGEMENTIn closed loop mode, the PCM initially calculatesinjector pulse width based on the same sensorsused in open loop The diffe

GEN III V8 ENGINE MANAGEMENTLong Term Fuel TrimLTFT is used to adjust for engine to enginevariation and to adjust for engine ageing LTFT is aportion o

GEN III V8 ENGINE MANAGEMENTELECTRONIC TRACTION CONTROLWhen the ABS/ETC control module senses spin from the drive wheels due to too much engine torque

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GEN III V8 ENGINE MANAGEMENTIDLE AIR CONTROL VALVEThe purpose of the Idle Air Control (IAC) valve, is to control engine idle speed, and prevent engine

GEN III V8 ENGINE MANAGEMENTThe following DTCs will set if the PCM detects an engine speed outside the lAC's operatingrange.DTC P0506 Idle Speed

GEN III V8 ENGINE MANAGEMENTEVAPORATIVE EMISSION CONTROL SYSTEMThe Evaporative Emission Control System (EECS)captures fuel vapours, which would normal

GEN III V8 ENGINE MANAGEMENTA failure in the Evaporative Canister Purge Solenoid or Circuit will set the following DTC:DTC P0443 EVAP Purge Solenoid C

GEN III V8 ENGINE MANAGEMENTREVERSE INHIBIT SOLENOIDThe manual transmission is fitted with a reverse inhibit mechanism that prevents the selection of

GEN III V8 ENGINE MANAGEMENTDIAGNOSISThe Rowel-train Management Section of the Service Manual is where to start all dnveability and emissionsdiagnosis

GEN III V8 ENGINE MANAGEMENTTECH 2 TEST MODES AND DISPLAYS FOR PCM DIAGNOSISAs a prerequisite to any PCM diagnostics the user must be familiar with th

GEN III V8 ENGINE MANAGEMENTF3: Miscellaneous TestsIn this test mode, the Tech 2 scan tool performs software override commands of the PCM, to assist i

GEN III V8 ENGINE MANAGEMENTSERVICE PROGRAMMING SYSTEMThe Gen III PCM does not contain a removable FROM, it uses an EEPROM (Flash Memory) which is non

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GEN III V8 ENGINE MANAGEMENTBasic Knowledge and Tools RequiredTo use the VT Series Service Manual effectively, a general understanding of basic electr

GEN III V8 ENGINE MANAGEMENTIntermittent Check Powertrain LampIn the case of an intermittent problem, the Check Powertrain lamp may light for ten seco

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GEN III V8 ENGINE MANAGEMENTPOWERTRAIN ON-BOARD DIAGNOSTIC SYSTEM CHECKAfter the visual/physical underhood inspection, the On-Board Diagnostic System

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GEN III V8 ENGINE MANAGEMENTSYSTEM DIAGNOSTICSThe PCM has two functions to perform1. It must be able to control the vehicle systems using sensor input

GEN III V8 ENGINE MANAGEMENTDiagnostic TestingOne of the primary functions of the diagnostic management system is to perform diagnostic testing of sys

GEN III V8 ENGINE MANAGEMENTDiagnostic InformationThe diagnostic tables and functional checks in the Service Manual are designed to locate a faulty ci

HOLDEN LTD A.C.N. 006 893 232SERVICE TRAININGCOPYRIGHT - HOLDEN LTDReproduction in whole or in part prohibited without written approvalFebruary 2000

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GEN III V8 ENGINE MANAGEMENTDTC InformationThe status of the diagnostic test and the related DTC messages can be viewed by using Tech 2 Thecombination

GEN III V8 ENGINE MANAGEMENTTest Fail ActionsWhen a diagnostic fails and a DTC is set, the Diagnostic Management System performs test fail actions. Th

GEN III V8 ENGINE MANAGEMENTPCM GEN III V8 ENGINE DIAGNOSTIC TROUBLE CODES (DTC)Page -18 GEN III V8 ENGINE MANAGEMENT

GEN III V8 ENGINE MANAGEMENTPCM GEN III V8 ENGINE DIAGNOSTIC TROUBLE CODES (DTC)(Continued)GEN III V8 ENGINE MANAGEMENT Page -19

GEN III V8 ENGINE MANAGEMENTNOTES.-Page - 20 GEN III V8 ENGINE MANAGEMENT

GEN III V8 ENGINE MANAGEMENTPOWERTRAIN INTERFACE MODULEThe Powertrain Interface Module (PIM), is locatedin the passenger compartment behind the left k

GEN III V8 ENGINE MANAGEMENTSERIAL DATA COMMUNICATION (BUS MASTER)Various devices; system control modules of the vehicle, as well as TECH 2 communicat

GEN III V8 ENGINE MANAGEMENTOn vehicles fitted with a GEN III V8, the devices (control modules) the BCM polls are• Power-train Interface Module (PIM)•

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GEN III V8 ENGINE MANAGEMENTTECH 2 TEST MODES AND DISPLAYS FOR PIM DIAGNOSISAs a prerequisite to any PIM diagnostics the user must be familiar with th

GEN III V8 ENGINE MANAGEMENTF1: Diagnostic Trouble CodesThe following functions will be available in this mode:FO: Read Current DTC Information - a li

GEN III V8 ENGINE MANAGEMENTF2: Data DisplayIn this test mode, TECH 2 displays the information the PIM is actually receiving and the status of the PIM

GEN III V8 ENGINE MANAGEMENTCRANKSHAFT POSITION SENSORThe Crankshaft Position Sensor (CKP) is mountedin the right rear of the engine block behind thes

GEN III V8 ENGINE MANAGEMENTA failure in the Crankshaft Position Sensor or circuit will set one of the following DTCs:DTC P0335 Crankshaft Position Se

GEN III V8 ENGINE MANAGEMENTCAMSHAFT POSITION SENSORThe Camshaft Position (CMP) sensor is mounted through the top of the engine block at the rear of t

GEN III V8 ENGINE MANAGEMENTA failure in the Camshaft Position Sensor or circuit will set one the of following DTCs:DTC P0341 Camshaft Position Sensor

GEN III V8 ENGINE MANAGEMENTMASS AIR FLOW SENSORThe Mass Air Flow (MAF) sensor utilises a heatedelement type of operation. A heated element in theMAF

GEN III V8 ENGINE MANAGEMENTCONTENTSSUBJECTGEN III V8 ENGINE MANAGEMENT

GEN III V8 ENGINE MANAGEMENTThe signal that is sent from the MAF sensor is sentin the form of a frequency output. A large quantityof air passing throu

GEN III V8 ENGINE MANAGEMENTA failure in the Mass Air Flow sensor or circuit will set one of the following DTCs:DTC P0101 Mass Air Flow System Perform

GEN III V8 ENGINE MANAGEMENTDTC P0103 Mass Air Flow Sensor Circuit High FrequencyConditions for running DTC P0103• The engine speed is greater than 30

GEN III V8 ENGINE MANAGEMENTMANIFOLD ABSOLUTE PRESSURE SENSORThe Manifold Absolute Pressure (MAP) sensor measures the changes in the intake manifold p

GEN III V8 ENGINE MANAGEMENTDTC P0107 Manifold Absolute Pressure Sensor Circuit Low VoltageConditions for running DTC P0107• No TP or ECT sensor DTCs

GEN III V8 ENGINE MANAGEMENTENGINE COOLANT TEMPERATURE SENSORThe Engine Coolant Temperature (ECT) sensor isa thermistor, (a resistor that changes valu

GEN III V8 ENGINE MANAGEMENTA failure in the Engine Coolant Temperature Sensor or circuit will set one of the followingDTCs:DTC P0117 Engine Coolant T

GEN III V8 ENGINE MANAGEMENTDTC P1114 Engine Coolant Temperature Sensor Circuit Intermittent Low VoltageConditions for running DTC P1114• The engine r

GEN III V8 ENGINE MANAGEMENTINTAKE AIR TEMPERATURE SENSORThe Intake Air Temperature (IAT) sensor is athermistor, (a resistor that changes resistance w

GEN III V8 ENGINE MANAGEMENTA failure in the Intake Air Temperature Sensor or circuit will set one of the following DTCs:DTC P0112 Intake Air Temperat

GEN III V8 ENGINE MANAGEMENTNOTES•GEN III V8 ENGINE MANAGEMENT

GEN III V8 ENGINE MANAGEMENTDTC P1111 Intake Air Temperature Sensor Circuit Intermittent High VoltageConditions for running DTC P1111• DTCs P0101, P01

GEN III V8 ENGINE MANAGEMENTTHROTTLE POSITION SENSORThe Throttle Position (TP) sensor is connected tothe throttle shaft on the throttle body unit. It

GEN III V8 ENGINE MANAGEMENTA failure in the Throttle Position Sensor or circuit will set one of the following DTCs:DTC P0121 Throttle Position Sensor

GEN III V8 ENGINE MANAGEMENTDTC P0123 Throttle Position Sensor Circuit High VoltageDTC P0123 Sensor CircuitConditions for running DTC P0123• The ignit

GEN III V8 ENGINE MANAGEMENTEXHAUST GAS OXYGEN SENSORSThe GEN III V8 engine incorporates the use of Heated Exhaust Gas Oxygen Sensors (H02S). The oxyg

GEN III V8 ENGINE MANAGEMENTThe oxygen sensors are mounted in the exhaustpipes and are referred to as Bank 1 Sensor 1 (leftexhaust pipe) Bank 2 Sensor

GEN III V8 ENGINE MANAGEMENTFour Wire Heated Oxygen Sensor CircuitA failure in the Heated Oxygen Sensors or circuits will set one of the following DTC

GEN III V8 ENGINE MANAGEMENTDTC P0132 Heated Oxygen Sensor Circuit High Voltage Bank 1 Sensor 1Conditions for running DTC P0132Criteria 1• DTCs P0101,

GEN III V8 ENGINE MANAGEMENTDTC P0134 Heated Oxygen Sensor Insufficient Activity Bank 1 Sensor 1Conditions for running DTC P0134• DTCs P0101,P0102, P0

GEN III V8 ENGINE MANAGEMENTDTC P0151 Heated Oxygen Sensor Circuit Low Voltage Bank 2 Sensor 1Conditions for running DTC P0151Criteria 1• DTCs P0101,

GEN III V8 ENGINE MANAGEMENTGENERAL INFORMATIONThe GEN III V8 engine uses a Powertrain Control Module (PCM) to control exhaust emissions while maintai

GEN III V8 ENGINE MANAGEMENTDTC P0153 Heated Oxygen Sensor (H02S) Slow Response Bank 2 Sensor 1Conditions for running DTC P0153• DTCs P0101, P0102, P0

GEN III V8 ENGINE MANAGEMENTDTC P0155 Heated Oxygen Sensor Heater Circuit Bank 2 Sensor 1Conditions for running DTC P0155• DTCs P0101,P0102, P0103, P0

GEN III V8 ENGINE MANAGEMENTDTC P0172 Fuel System Rich Bank 1Conditions for running DTC P0172• DTCs P0101, P0102,P0103, P0107, P0108, P0112, P0113, P0

GEN III V8 ENGINE MANAGEMENTDTC P0175 Fuel System Rich Bank 2Conditions for running DTC P0175• DTCs P0101, P0102, P0103, P0107, P0108, P0112, P0113, P

GEN III V8 ENGINE MANAGEMENTKNOCK SENSORSVarying octane levels in today's petrol may causedetonation in some engines. Detonation is causedby an u

GEN III V8 ENGINE MANAGEMENTA failure in the Knock Sensors or Circuits will set one of the following DTCs:DTC P0325 Knock Sensor SystemConditions for

GEN III V8 ENGINE MANAGEMENTDTC P0332 Knock Sensor Circuit Rear SensorConditions for running DTC P0332• The engine run time is greater than 20 seconds

GEN III V8 ENGINE MANAGEMENTVEHICLE SPEED SENSORThe PCM receives vehicle speed information from theVehicle Speed Sensor (VSS) located on the rear of t

GEN III V8 ENGINE MANAGEMENTA failure in the Vehicle Speed Sensor or Circuit will set on of the following DTCs:DTC P0502 Vehicle Speed Sensor Circuit

GEN III V8 ENGINE MANAGEMENTDTC P0608 Vehicle Speed Output CircuitConditions for running DTC P0608• The engine speed is greater than 600 RPM• The igni

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GEN III V8 ENGINE MANAGEMENTENGINE COOLANT LEVEL SWITCHThe engine coolant level switch is a reed switchand is used to inform the PCM when the coolantl

GEN III V8 ENGINE MANAGEMENTENGINE OIL PRESSURE SENSORThe Engine Oil Pressure Sensor is screwed intothe oil gallery at the top rear of the engine bloc

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GEN III V8 ENGINE MANAGEMENTAIR CONDITIONING PRESSURE TRANSDUCERThe air conditioning pressure transducer is a sealed gauge reference capacitive pressu

GEN III V8 ENGINE MANAGEMENTA/C REQUEST SIGNAL AND A/C CLUTCH CONTROL WITH ECCThe Electronic Climate Control (ECC) module requests the PCM to turn the

GEN III V8 ENGINE MANAGEMENTA/C REQUEST SIGNAL AND A/C CONTROL WITHOUT ECCThe BCM requests the PCM to turn the A/C compressor clutch on or off via the

GEN III V8 ENGINE MANAGEMENTA/C Request Signal Circuit Without ECCThe PCM on receiving a request to turn on the A/C compressor, monitors the A/C press

GEN III V8 ENGINE MANAGEMENTA failure in the A/C Clutch Circuit will set one of the following DTCs:DTC P1539 A/C Clutch Status Circuit High VoltageThe

GEN III V8 ENGINE MANAGEMENTENGINE COOLING FANSThe PCM determines operation of the two speedengine cooling fans based on A/C request, A/Csystem pressu

GEN III V8 ENGINE MANAGEMENTLow Speed ResponseThe engine cooling fan Low Speed Relay is energised by the BCM. When the PCM determines that the lowspee

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GEN III V8 ENGINE MANAGEMENTA failure in the Cooling Fan Circuits will set one of the following DTCs:DTC P0481 Cooling Fan High Speed Relay ControlCon

GEN III V8 ENGINE MANAGEMENTTHEFT DETERRENT INPUTWhen the ignition switch is turned from off to on, the BCM will transmit security information to the

GEN III V8 ENGINE MANAGEMENTA failure in the Theft Deterrent System or Circuits will set one of the following DTCs:DTC P1626 Theft Deterrent System Fu

GEN III V8 ENGINE MANAGEMENTDTC P1630 Theft Deterrent Powertrain Control Module In Learn ModeConditions for running DTC P1630• The PCM is in the learn

GEN III V8 ENGINE MANAGEMENTTRANSMISSION FLUID PRESSURE MANUAL VALVE POSITION SWITCH ASSEMBLYThis gear range sensing device called aTransmission Fluid

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GEN III V8 ENGINE MANAGEMENTA failure in the TFP Switch Assembly or Circuits will set the following DTCs:DTC P1810 TFP Valve Position Switch CircuitCo

GEN III V8 ENGINE MANAGEMENTPARK, REVERSE, NEUTRAL, DRIVE, LOW (PRNDL) SWITCHThe transmission PRNDL switch is a multi-signal switchwhich sends signals

GEN III V8 ENGINE MANAGEMENTCHECK POWERTRAIN LAMPThe instruments receive Check Powertrain Lampinformation (CPL) from the PCM via the PIM andthe serial

GEN III V8 ENGINE MANAGEMENTIGNITION SYSTEMThe ignition system on the GEN III V8 engine features a multiple coil ignition and is known as coil near pl

GEN III V8 ENGINE MANAGEMENTPOWERTRAIN CONTROL MODULEThe Powertrain Control Module (PCM), is located in the engine compartment and constantly monitors

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GEN III V8 ENGINE MANAGEMENTA failure in the Ignition System Coils/Modules or Circuit will set one of the following DTCs:DTC P0351 Ignition Control #1

GEN III V8 ENGINE MANAGEMENTFUEL SYSTEMBASIC FUEL SYSTEM OPERATIONThe fuel control system used on the GEN III V8 is a "Returnless" or "

GEN III V8 ENGINE MANAGEMENTGerotor Fuel Pump OperationFuel passes through the pump in two distinct stages;Vapour SeparationThe first fill impeller se

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GEN III V8 ENGINE MANAGEMENTModular Fuel Sender OperationDuring fuelling, fuel enters the reservoir through the secondary umbrella valve (28), located

GEN III V8 ENGINE MANAGEMENTFuel Pressure RegulatorThe fuel pressure regulator is a diaphragmoperated relief valve with fuel pump pressure onone side

GEN III V8 ENGINE MANAGEMENTFUEL PUMP ELECTRICAL CIRCUITSWhen the ignition switch is turned to on or crankafter having been off for at least 10 second

GEN III V8 ENGINE MANAGEMENTFUEL INJECTORSThe fuel injectors are electrically operated fuel flow control valves. They are supplied with battery voltag

GEN III V8 ENGINE MANAGEMENTFUEL CONTROL SYSTEMThe purpose of closed loop fuel control is to controltailpipe emissions consisting of hydrocarbons (HC)