®CP9087TMPROFESSIONALPULSE9V BATTERY TEST: 1) SET RANGE TO HIGH.2) SET FUNCTION TO OHMS. 3) DISCONNECT ALL LEADS.O.K. IF TOPMOST TEST LIGHT IS ON
Section 22-2 Engine TEMPERATUREWhat toInspectSensor operation (see test on page 2-4). Poorconnections at sensor or computer. Faulty sensorwiring (open
2-3Air TEMPERATUREWhat toInspectSensor operation (see test on page 2-4). Poorconnections at sensor or computer. Faulty sensorwiring (open or short cir
Temperature Sensor Test ProcedureUse this procedure for testing all engine coolant or inlet air temperature sensors.Exceptions:• Certain Toyota, Nissa
2-5Engine Air TEMPERATURE6) Verify test clips make good contact and do not touch eachother.Make sure red and green test clips are not touching anythin
2-6Testing SensorsSection 2TYPICAL THROTTLE POSITION SENSORSThrottle Position SensorThe throttle position sensor is apotentiometer - a type of variabl
THROTTLE POSITION Sensor/Switch2-7• Sometimes a second switch is used to signal a wideopen throttle condition. This switch is normally open (orclosed
2-8Testing SensorsSection 2Some sensors require more than one test.Throttle Position Sensor ConnectorsNote: If the Red and Black test lead hook-ups a
2-9THROTTLE POSITION Sensor/SwitchTOYOTABABlackYellowRedBlackYellowAB BRedBlackYellowBlackYellowBlackYellowTOYOTA/NISSANBBYellow BlackBlack YellowNot
2-10Testing SensorsSection 2 TEST A - Throttle Position SensorImportant: If more than one hook-up is shown, it means more than one test isrequired to
2-11THROTTLE POSITION Sensor/Switch7) Honda only: 1988-92 Civic and CRX– Remove vacuum hose from dashpot diaphragm.– Apply 20 in. Hg to the dashpot di
VehicleServiceInfoVehicle ServiceManuals from GeneralMotors CorporationBuick, Cadillac,Chevrolet, GEO, GMC,Oldsmobile & PontiacHelm IncorporatedPo
TEST B - Throttle Position SwitchImportant: If more than one hook-up is shown, it means more than one test isrequired to check all parts of the switch
FUNCTIONVOLTSOHMSFREQUENCYTHROTTLE POSITION Sensor/Switch2-13RANGEHIGHLOW POWER OFF7) Set RANGE switch to HIGH.8) Set FUNCTION switch to OHMS.9) O
2-14Testing SensorsSection 2Sensor operation (see page 2-15). Poor connec-tions at the sensor or computer. Damaged orsticking EGR valve. Worn or broke
EGR Valve Position/Lift Sensors2-15EGR Valve Position Sensor Test ProcedureSensor may be tested on or off vehicle.Warning: Observe all safety precauti
2-16Testing SensorsSection 2Off-Car test: Slowly push sensor element back and forthfrom end to end.• Good Sensor - TEST light smoothly moves up or dow
EGR Valve Position/Lift Sensors2-17Sensor ConnectorsBlackRedYellowNote: If the Red and Black test lead hook-ups are reversed,the TEST light will move
2-18Testing SensorsSection 2LocationThe sensor is threaded into the exhaust manifold togive it direct contact with the exhaust gases.How it isused?The
OXYGEN2-19IMPORTANT:Some engines (usually off-road applications)use a titania-type oxygen sensor. This sensorresembles the common zirconium type, but
2-20Sensor TypesTesting SensorsSection 21-Wire: Single wire goes to sensor SIGNAL.Sensor housing is connected to sensor GROUND.2-Wire: One wire goes t
2-21OXYGENHeating Element Test• Do this test if sensor has a heating element (3 or 4 wire connector).• If sensor has 1 or 2 wire connector, do not do
IndexiVehicle Service Information ... Inside front coverSafety Precautions ...
2-22Testing SensorsSection 2On-Car TestImportant: Reliable testing of the oxygen sensor while on-vehicle is verydifficult because test conditions cann
OXYGEN2-238) Observe RICH/LEAN lights during fast idle.• The TEST light column also indicates sensor voltage,but it is easier to check operation by wa
2-24Testing SensorsSection 2Off-Car TestWarning: This test involves use of an open flame from a propane torch.Observe all safety precautions for torch
OXYGEN2-2511) Observe RICH/LEAN lights while operatingsensor.• After sensor tip is hot. move the flame until thesensor tip is completely surrounded by
2-26Testing SensorsSection 2What toInspectSensor operation (see test on page 2-27). Poorconnections at sensor or computer. Faulty sensorwiring (open
RANGEHIGHLOW POWER OFFEngine KNOCK2-27Knock Sensor Test ProcedureSensor may be tested on or off vehicle.Warning: Observe all safety precautions (see
2-28Testing SensorsSection 2The computer needs to know air pressure bothoutside and inside the manifold to properly adjustthe air/fuel mixture and ign
Manifold Absolute Pressure MAP/BARO2-29LocationThe sensor is mounted either on the bulkhead, aircleaner, throttle body or elsewhere in the enginecomp
2-30Testing SensorsSection 2Manifold Absolute Pressure (MAP) SensorTest ProcedureTesting is done on-vehicle.Warning: This test involves running the en
2-31• Note: If the TEST light is OFF a problemexists. Go to step 9 and continue testing to findcause.8) Operate sensor - Watch TEST light forresults.(
6-3iiGeneral Safety Guidelines to Follow WhenWorking on Vehicles• Always wear approved eye protection• Always operate the vehicle in a well-ventilated
Testing SensorsSection 22-3211) Check MAP sensor power circuit.Keep sensor connected to vehicle wiring.• YELLOW test lead to sensor POWER circuit.Use
2-33Manifold Absolute Pressure MAP/BARO14) Check MAP signal wire for short to ground.•Verify ignition key OFF and MAP sensor wiringharness disconnect
2-34Testing SensorsSection 2FLOW- F +TypicalMAFSensor• Related trouble codes sent by computer.• Driveability problems such as hard starting,rough idle
Mass Air Flow MAF2-35Vehicle Harness Connectors for MAF Sensor(Mating side of connector shown.)Refer to vehicle service manual for connectors not sho
2-36Testing SensorsSection 2Vehicle Harness Connectors for MAF Sensor(Mating side of connector shown.)= May not be usedRefer to vehicle service manual
Mass Air Flow MAF2-37Mass Air Flow (MAF) Sensor Test ProcedureTesting is done on-vehicle.Warning: This test involves running the engine. Observe all
2-38Testing SensorsSection 2– Note: If test results are O.K. but a computertrouble code indicates a bad sensor signal, thewire between the sensor sign
Mass Air Flow MAF2-3912) Check MAF sensor ground circuit.• Same set-up as previous step, but move YELLOWtest lead to sensor GROUND circuit. Do not pr
2-40Testing SensorsSection 2Sensor operation (see tests on pages 2-43 through 2-44).Poor connections at sensor or computer. Faulty sensorwiring (open
1234567123456712345671234567Vane Air Flow VAF2-41Sensor ConnectorsRed YellowBlack#1ToyotaA *A *#2YellowRedBlackCBlackYellowBBlack Yellow*Toyota usest
11-1SectionTesterBasics— Description of Controls and Accessories— Installing and Checking the 9 Volt BatteryNote: Detailed procedures for testing sens
2-42Testing SensorsSection 2TEST PREPARATION:All Air Flow Meter Sensor TestsIMPORTANT:• Test all hook-ups shown for the sensor.• The letter next to th
Mass Air Flow MAF2-43TEST A - Air Flow Meter SensorWarning: Observe all safety precautions (see page ii) if testing sensor onvehicle.1) Do all Test P
2-44Testing SensorsSection 2TEST B - Air Temperature SensorWarning: Observe all safety precautions (see page ii) if testing sensor onvehicle.1) Do all
Mass Air Flow MAF2-45Test C - Air Flow Meter Position SwitchWarning: Observe all safety precautions (see page ii) if testing sensor onvehicle.1) Do a
2-46Testing SensorsSection 2What is ItandHow is ItUsed?— The computer needs to know rotational speed (orposition) of the engine crankshaft/camshaft fo
Crankshaft/Camshaft Position2-47The optical crank angle sensor consists of a lightsource, a light detector (photo-electric cell) and a rotorplate, whi
2-48Testing SensorsSection 2Where isIt?— Crankshaft Position, Crank Angle, Flywheel, DistributorPick-Up, Camshaft Position, Cylinder, TDC and RPM. The
2-49 Test A - Magnetic Reluctance Type SensorTesting is done on-vehicle.DO NOT test vehicle speed or driveshaft type sensors since they requirevehicle
2-50Testing SensorsSection 2Observe all safety precautions (see page ii) - enginemay start or backfire.Note: Some computer systems will store a troubl
2-51Test B - Hall Effect Type or Optical Type SensorSensor may be tested on or off vehicle.Warning: Observe all safety precautions (see page ii) if te
Section 11-23TESTLightsA single TEST light turns on to show the level of a measured signal(voltage, resistance or frequency). When signal values are l
2-52Testing SensorsSection 2On-Car test: Crank engine. STAY AWAY from movingengine parts. Observe all safety precautions (seepage ii) - engine may sta
3-1Section 23SectionTestingIgnition ModulesTroubleshootingTipsSave yourself time! Always begin with a thoroughvisual and “hands-on” inspection. You ca
Ignition Module Test ProcedureGM • Ford • Chrysler • Toyota • Honda • NissanImportant:• This test checks for “dead” modules causing a no-start. This t
IGNITION MODULES3-3GM 7 & 8 pin modules only:– Reconnect test leads as shown in Test 2diagram.– Observe PULSE light. It should NOT beflashing. If
Testing Ignition Modules3-4Section 3GM4 and 5 pinBASEPLATEBUSHING*Test clip musttouch both baseplate and bushing**YellowRedGreenBlackBlackYellowRedGr
3-5GM7 pin**BASEPLATEBUSHINGTest clip musttouch both baseplate and bushing*BlackYellowRedGreenBlue JumperTest 2BlackYellowRedBlue Jumper**BlackGreenT
Testing Ignition Modules3-6Section 3GM8 pinPNGBRE+CCGBRETest 1PNGBRE+CCGBRETest 2BlackYellowRedGreenSIDEVIEWENDVIEWGreenSIDEVIEWENDVIEWYellowRedBlackB
3-7FordDura-Spark456321SIDEVIEWENDVIEWBlue JumperGreenRedYellowBlackNote: Dura-Sparkignition modulescome in severalversions with differentconnector ty
789654321Testing Ignition Modules3-8Section 3FordTFI-IVTest 1: Connect leads as shown.Test 2: Move Green lead to pin 5.Other leads remain in original
3-9Chrysler4 and 5 pin5-pin type shown.4-pin uses same hook-up.Magetic Reluctance Pick-up54321Hall Effect Pick-up12354RedBlackRedYellowGreenGreenBlack
PULSE9V BATTERY TEST: 1) SET RANGE TO HIGH.2) SET FUNCTION TO OHMS. 3) DISCONNECT ALL LEADS.O.K. IF TOPMOST TEST LIGHT IS ON. WEAK IF ANOTHER LIGH
32143214Testing Ignition Modules3-10Section 3RedBlackYellowRedYellow1234HondaConnect BLACK test leadto igniter mounting holesor a metal ground insided
IMPORTANT1) Remove distributor fromengine before testing.2) Module remains insidedistributor during test.3-11CBIWConnect BLACK test leadto a good grou
SBIETesting Ignition Modules3-12Section 3NissanNissanOne-Coil System(Photo pick-up)Nissan uses two typesof connector wiring.Module is good if eitherho
3-13NissanTwo-Coil System(Photo pick-up)Not present onsome modules.GreenYellowBlack14231423**ORBlackGreenYellowGreen YellowBlackNissan uses two typeso
Testing Ignition Modules3-14Section 3ToyotaIMPORTANTFor Toyota modules not pictured, refer tovehicle service manual and connect as follows:• Red lead
BLACKC Ext B I, TFBROWN3-15ToyotaBlackRedYellowGreenConnectBLACK testlead to ignitermounting holeor good vehicleground.RedYellowGreen
Testing Ignition Modules3-16Section 3ToyotaGreenRedYellowUse a paper clip toconnect test lead.YellowGreenConnectBLACK testlead to ignitermounting hole
3-17ToyotaGreenRedConnectBLACK testlead to ignitermounting holeor good vehicleground.Use a paper clip toconnect test lead.YellowBlack
Testing Ignition Modules3-18Section 3ToyotaBlackGreenRedYellowConnect BLACKtest lead to ignitermounting hole orgood vehicleground.Use a paper clip toc
3-19ToyotaYellowRedGreenYellowRedGreenConnect BLACKtest lead to ignitermounting hole orgood vehicleground.Black
Section 1Tester Basics1-48Used when checking some ignition modules. Makesextra connections as required for testing.Jumper Lead9ConnectorPin AdaptersUs
Testing Ignition Modules3-20Section 3ToyotaYellowGreenRedBlackConnectBLACK testlead to ignitermounting holeor good vehicleground.
3-21ToyotaC+SGBC+SGBTBCFBCTFBlackConnect BLACK test leadto igniter mounting holes.YellowGreenRedYellowRedGreenRedYellowGreenYellowGreenRed
3-22Notes
4-1Section 24SectionMore Uses for theIgnition Module &Engine Sensor TesterCircuit Voltage ChecksThis function is useful for checking the presence
Section 44-2Continuity ChecksTest wiring, ground connections, switch operation, relay contacts, or similar.Important:• Do continuity tests on unpowere
More Uses for the Ignition Module/Sensor Tester4-3Continuity Checks (cont.)12V 12VTESTTESTYellow Black Yellow BlackGroundConnectionNoGroundConnectionT
Section 44-4 Diode ChecksTests diodes and rectifiers for proper operation.1) Set RANGE switch to HIGH.2) Set FUNCTION switch to OHMS.3) Connect TEST l
Actron ManufacturingCompany9999 Walford AvenueCleveland, Ohio 44102-4621USATel: +1-261-651-9200Fax: +1-216-651-2853Product Information & RepairCus
Actron Manufacturing Company9999 Walford AvenueCleveland, Ohio 44102-4696©1997, Actron Manufacturing CompanyMade in the U.S.A.Part No. 2-221301®
2-1Section 2Section2Testing SensorsTroubleshootingTipsSave yourself time! Always begin with a thoroughvisual and “hands-on” inspection. You can oftenf
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