Actron GM Code Scanner CP9001 Uživatelský manuál Strana 1

1Car Computer Code ReaderDomestic GM & SaturnLector de Códigosde Computadorasde AutomóvilGM y Saturnnacionales de EE.UU. conSystemas MCU y EEC-IV

10• A code 12 is always sent evenwhen the computer sees noproblem. This tells you thecomputer diagnostic checks areworking properly. If you do not get

11TEST RESULTS COMMENTS• You have a problem which needs repairbefore using the Code Scanner.• Refer to “Diagnostic Circuit Check” chartin vehicle serv

12Using CodesUsing Trouble Codes as Part of a BasicTroubleshooting ProcedureA driveability problem can have manypossible causes which are not related

132) Basic Mechanical ChecksDon’t overlook the basic checks listedon the next page. Mechanical problemsby themselves can always create enginetroubles

14called “Computerized EngineControls”, “Electronic EngineControls” or “Tune-Up Information.”• Follow all the steps in the diagnosticprocedure for the

15TESTABSENGINE–Open the in-line fuse holder goingto the positive battery terminal, OR–Disconnect negative batteryterminal – but this will also eraseo

16Code MeaningsNote:• Code meanings canvary with vehicle,model year, enginetype and options.• If a code number hasmore than onedefinition listed, note

1721Throttle position sensor(TPS) - signal voltage ishigh during engine idle ordeceleration.22Throttle position sensor(TPS) - signal voltage islow dur

1841Cam sensor (CAM) failure.ORCylinder select error.ORTach input error - noreference pulses duringengine run.ORElectronic spark timing(EST) circuit -

1961Oxygen (O2) sensordegraded.ORPort throttle system error.ORCruise control problems -vent solenoid circuit.ORAir Conditioner (A/C)system performance

2

2081Brake switch circuitproblems.ORAnti-Lock Brake System(ABS) message fault(Saturn).OR(Transmission) Solenoid“B” (3-2 shift solenoid) -open or short

21 Saturn Transmission Codes(GM/Saturn engine codes and GM transmission code list begins on page 14.)Note: Code numberslabeled “InformationFlag” may

22absolute pressure (MAP)sensor signal, handwheelsensor signal, throttleposition sensor (TPS)signal are zero volts.55Transaxle temperaturesensor failu

2376(Information Flag)4th line circuit - groundedor open.OR(Information Flag)Throttle position sensor(TPS) to manifold absolutepressure (MAP) sensorvo

24Other FeaturesAdditional Code Scanner Diagnostic FeaturesThis section contains...Relay and Solenoid Circuit Test: Youcan switch on most of the com

253) Turn Ignition Key to ON Positionbut DO NOT START THE ENGINE.• WARNING: Stay away from theradiator cooling fan! It may turn on.• Ignore the flashi

26Diagnostic Mode.” The flashing“Check Engine” light shows how thefuel control system is operating.See below.Read Section 7, “Computer Basics”or Secti

27COMPUTER BASICSWhat does the Engine Control Computer do?This section further explains the enginecomputer control system, the types ofsensors and

28can understand.You can think of sensors as “high tech”senders the devices found in oldervehicles for gauges and dashboardmessage lights (oil pressu

29The computer needs to know:• ...what the engine operatingcondition is.Sensors used: coolant temperature,throttle position, manifold absolutepressure

3Congratulations on purchasing yourActron Code Scanner for accessingengine trouble codes required forrepairing vehicles equipped withcomputers. Your A

30Acceleration, deceleration and idleconditionsAs long as the engine and oxygensensor are hot, the computer canoperate “closed loop” for best economya

31Computer controlledemission systems EGR (Exhaust Gas Recirculation)ValveThe EGR valve lets exhaust gases re-enter the intake manifold and mix wit

32conditions. This improves fueleconomy by eliminating power loss inthe torque convertor. The computerenergizes a solenoid to achieve lock-up. Signals

33GLOSSARYA/CAir conditioner.A/C ClutchrelayThe ECM uses this relay toenergize the A/C clutch - toturn the A/C system on oroff.A/C On (A/CSignal)An in

34C3Computer CommandControl. The name for theGM electronic enginecontrol system used onmost vehicles built since1982.CALPAKA “spare tire” for the ECM.

35(Digital Multi-Meter). MostDVM’s have 10 Megohminput impedance. Thismeans the circuit undertest will not beelectronically disturbedwhen the DVM isco

36delivery modified by anelectronic signal from theECM. The signal controls a“mixture control solenoid”(MCS) attached to thecarburetor body.FrequencyT

37InputsElectrical signals runninginto the ECM. Thesesignals come fromsensors, switches or otherelectronic modules. Theygive the ECM informationabout

38P/NPark/Neutral switch. Thisswitch tells the ECM whenthe gear shift lever is in thePark or Neutral position.Then the ECM will operatethe engine in a

39Stepper MotorA special type of electricmotor with a shaft thatrotates in small “steps”instead of a continuousmotion. A certainsequence of frequencyt

4General Safety Guidelines to followwhen working on vehicles• Always wear approved eye protection.• Always operate the vehicle in a well ventilat

40Typical 4-Wheel Anti-Lock Brake SystemCourtesy of General Motors Corp.Front WheelSpeed SensorsElectronic BrakeControl Unit(ABS computer)Rear Wheel

41ABS TypesThere are three basic types...• RWAL (Rear Wheel Anti-Lock)This is the simplest ABS system(mostly used on small rear-wheel-drivetrucks). On

42wheel). The ring is attached to thewheel, drive axle or transmission shaft.Whenever a tooth from the ring passesby the sensor, it attracts the magne

43brake circuit during ABS operation.(ABS relieves brake line pressure toavoid wheel lock-up.) Four wheelABS systems use two accumulators:one for the

44– continuously monitor wheel speedor...– wait for brake pedal applicationbefore monitoring wheel speed.The ABS computer controls brakingaction when

45ABS Braking – Pressure DecreaseWheel speed signals indicate lock-upis still about to occur. ABS computertakes next step in brake control cycle:decre

46ABS SAFETYGeneral Safety Guidelines to FollowWhen Working on ABS VehiclesWARNING: To avoid personal injury, DO NOT open a bleedervalve or loosen

47ABS TIPSUseful Hints to Know WhenTroubleshooting ABS SystemsIMPORTANT: Always follow vehicle service manual procedures for any ABSrepairs. (Manua

48needed, from your vehicle dealer. It isa special type for this purpose.• Make sure any recommendedsystem flushing has been per-formed. Corrosion or

49READING CODESHow to Use the Code Scanner to Read ABS Codes1) Use the chart to find the ABS system used on your vehicle.2) Refer to the page listed

5About CodesWhere do they come from and what are they for?Engine computers can findproblems.The computer system in today’svehicles does more t

501990Model System Page98 Regency 5 74Astro 7 or 8See note p. 50Blazer 7 84Bonneville 5 74Bonneville SSE 5 74Brougham 2 56C SeriesPickup Truck 7 84Cor

511992Model System PageAstro 7 or 8See note p. 50Blazer 7 or 8See note p. 50Bravada 8 88Brougham 2 56C SeriesPickup Truck 7 or 8See note p. 50Eldorado

521994Model System PageAstro 8 88Blazer 7 or 8See note belowBravada 8 88C SeriesPickup Truck 7 or 8See note belowDeVille 4 68Eldorado 4 68G Series Van

53SYSTEM 1: Bosch 2S1990 Corvette  1991 CorvettePre-Diagnostic Visual InspectionComplete all steps before readingtrouble codes!1) Check that all AB

54Reading ABS Codes  Bosch 2SIMPORTANT: Perform all steps inPRE-DIAGNOSTIC VISUAL INSPEC-TION and FUNCTIONAL CHECKbefore reading ABS codes!1) Take Sa

55Example of code 12 only:❊ PAUSE ❊❊FLASH (pause) FLASH FLASH(longer pause)❊ PAUSE ❊❊FLASH (pause) FLASH FLASH(longer pause)❊ PAUSE ❊❊FLASH (pause) FL

56TMGM 1982 & higher - CP 9001Car Computer Code ReaderErasing ABS Codes from ComputerMemory  Bosch 2SErase codes from memory wheneveryou complete

57ABS Code Meanings  Bosch 2SIMPORTANT: Always follow vehicle service manual procedures for any ABSrepairs!(Manual listings on page 4.)12Diagnost

58SYSTEM 2:Bosch 2U (Version A)1990 Brougham1991 Caprice, Custom Cruiser, Roadmaster1992 BroughamPre-Diagnostic Visual InspectionComplete all step

59Perform FUNCTIONAL CHECK beforereading codes!Functional CheckBrougham1) Start the engine.The brakewarning lamp should come ONduring engine cranking,

6Trouble codes give you valuableknowledge – whether you go forprofessional vehicle servicing or “do-it-yourself. ” Now that you know whattrouble codes

60testing. Some vehicles require thiscover in place for proper operation.4) Verify Ignition Key is OFF5) Put the TEST switch on ABS6) Plug the Code Sc

61Example of code 12 only:❊ PAUSE ❊❊FLASH (pause) FLASH FLASH(longer pause)❊ PAUSE ❊❊FLASH (pause) FLASH FLASH(longer pause)❊ PAUSE ❊❊FLASH (pause) FL

62OFFONErasing ABS Codes from ComputerMemory: Bosch 2U (Version A)Erase codes from memory wheneveryou complete a repair or to see if aproblem will occ

63ABS Code Meanings: Bosch 2U (Version A)IMPORTANT: Always follow vehicle service manual procedures for any ABSrepairs! (Manual listings on page 4.)1

64SYSTEM 3:Bosch 2U (Version B)1991 Brougham, Eldorado, Reatta, Riviera, Seville, Toronado, Trofeo1992 Eldorado, Riviera, Seville, Toronado, Tro

65• 1992 Toronado, Trofeo:–Check fuse number 18 in theunderdash fuse block.–Check the black and blue coloredfusible links on the positivejunction bloc

66Reading ABS Codes:Bosch 2U (Version B)IMPORTANT: Perform all steps inPRE-DIAGNOSTIC VISUAL INSPEC-TION and FUNCTIONAL CHECKbefore reading ABS codes!

67Example of code 12 only:❊ PAUSE ❊❊FLASH (pause) FLASH FLASH(longer pause)❊ PAUSE ❊❊FLASH (pause) FLASH FLASH(longer pause)❊ PAUSE ❊❊FLASH (pause) FL

68Erasing ABS Codes fromComputer Memory:Bosch 2U (Version B)Erase codes from memory wheneveryou complete a repair or to see if aproblem will occur aga

69ABS Code Meanings: Bosch 2U (Version B)IMPORTANT: Always follow vehicle service manual procedures for any ABSrepairs! (Manual listings on page 4.)1

7When to Read CodesUse the Code Scanner to read computertrouble codes if...Check Engine Light: ProblemSpotted!Light ON and stays ON (when theeng

70SYSTEM 4:Bosch 2U (Version C)1993 Eldorado, Seville1994 DeVille, Eldorado, SevillePre-Diagnostic Visual InspectionComplete all steps before rea

71Reading ABS Codes: Bosch 2U(Version C)IMPORTANT: Perform all steps inPRE-DIAGNOSTIC VISUAL INSPEC-TION and FUNCTIONAL CHECKbefore reading ABS codes!

72Example of code 12 only:❊ PAUSE ❊❊FLASH (pause) FLASH FLASH(longer pause)❊ PAUSE ❊❊FLASH (pause) FLASH FLASH(longer pause)❊ PAUSE ❊❊FLASH (pause) FL

73Erasing ABS Codes from ComputerMemory: Bosch 2U (Version C)Erase codes from memory wheneveryou complete a repair or to see if aproblem will occur ag

74ABS Code Meanings: Bosch 2U (Version C)IMPORTANT: Always follow vehicle service manual procedures for any ABSrepairs! (Manual listings on page 4.)1

7551Right Rear SolenoidValve circuit. This codewill set if the physicalposition of the subjectvalve does not match thecommanded position asgiven by th

76SYSTEM 5:Teves Mark II (Version A)1989 Bonneville, Bonneville SSE, Delta 88, DeVille,Electra, Fleetwood, 98 Regency, Park Avenue1990 Bonneville,

77–If the anti-lock lamp is ON, and thebrake warning lamp is ON, refer tothe proper diagnostic chart in thevehicle service manual.–If the anti-lock la

789) Get a TroubleCode fromFlashing “Anti-Lock” Light• All codes are two (2) digits long.• Count flashes to get troublecodes. Flashes start after abou

79ABS Code Meanings: Teves Mark II (Version A)IMPORTANT: Always follow vehicle service manual procedures for any ABSrepairs! (Manual listings on page

8Reading CodesUsing the Code Scanner to Read Codes1) Safety First!• Set the parking brake.• Put shift lever in PARK (automatictransmission) or NEU

8051Left Front WheelHydraulic PressureReduction fault. Thiscode is the result of anincorrect response to ahydraulic circuit pressurereduction command

81SYSTEM 6:Teves Mark II (Version B)1989 Eldorado, Reatta, Riviera, Seville, Toronado1990 Eldorado, Reatta, Riviera, Seville, Toronado, TrofeoPre-Di

82Reading ABS Codes:Teves Mark I (Version B)IMPORTANT: Perform all steps inPRE-DIAGNOSTIC VISUAL INSPEC-TION and FUNCTIONAL CHECKbefore reading ABS co

83TMGM 1982 & higher - CP 9001Car Computer Code Reader• Count flashes to get trouble codes.Flashes start after about a 4 seconddelay.– The first d

84ABS Code Meanings: Teves Mark II (Version B)IMPORTANT: Always follow vehicle service manual procedures for any ABSrepairs! (Manual listings on pag

8548Any three Wheel SpeedSensor Signals Missing.There are missing signalsin three (3) of the four (4)wheel speed sensorcircuits.51Left Front WheelHydr

86OFFONSYSTEM 7: Kelsey-HayesRWAL (Rear Wheel Anti-Lock)1988 Blazer, C & K Series Pickup Truck, Sierra1989 Astro, Blazer, C & K Series

87Reading ABS Codes:Kelsey-Hayes RWALIMPORTANT: Perform all steps inDIAGNOSTIC CIRCUIT CHECKbefore reading ABS codes!1) Take Safety Precautions• Set p

88OFFONCode 3 looks like:starts overpauseSHORTCode 3SHORTFLASHL O N GFLASH❊❊FLASH❊Code 5 looks like:starts overpauseSHORTCode 5SHORTFLASHSHORTSHORT

89ABS Code Meanings: Kelsey-Hayes RWALIMPORTANT: Always follow vehicle service manual procedures for any ABSrepairs! (Manual listings on page 4.)1EC

9TMGM 1982 & higher - CP 9001Car Computer Code Reader6) Plug the Code Scanner into theTest Connector. Put TEST switchon ENGINE.sequence is repeate

90SYSTEM 8: Kelsey-Hayes4WAL (4 Wheel Anti-Lock)1990 Astro, Safari1991 Astro, Bravada, S & T Series Blazer, Jimmy,Pickup, Safari, Sonoma, Sycl

91Reading ABS Codes:Kelsey-Hayes 4WALIMPORTANT: Perform all steps inDIAGNOSTIC CIRCUIT CHECKbefore reading ABS codes!Note (1990, 1991 only): Codes 21,

92• After all codes are sent, the wholesequence is repeated. Thiscontinues until the ignition key isturned OFF (so you can doublecheck your code list)

93ABS Code Meanings: Kelsey-Hayes 4WALIMPORTANT: Always follow vehicle service manual procedures for any ABSrepairs! (Manual listings on page 4.)12A

9429All Wheel Speed SensorVoltage Output Signalsare erratic. Trouble code 29is usually caused by animproperly seated 8 wayconnector at the EHCU(Electr

95attach a tag to your defectiveunit clearly indicating thetrouble code(s) reported bythe defective EHCU.43, 44, 47, 48,53, 54, & 68 allat the sam

96GM Code Scanner Applications* Code Scanner is only applicable if vehicle DOES NOT HAVE a climate control computerCenturyElectraElectra WagonEstate W

97MAKEBuickCadillacChevroletOldsmobilePontiacCARSYEAR1989-901989-901989-911989-9319911990-921989-901989-931989-901989-9319911990-911989-9019911989-901

98ONE (1) YEAR LIMITED WARRANTYActron Manufacturing Company (“Actron”) warrants to the original purchaser that this prod-uct will be free from defects