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Actron CP9087 Service Manual

Actron sensor tester service manual
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  • Page 1 ® CP9087 PROFESSIONAL...

  • Page 2: Vehicle Service Manuals

    Vehicle Service Info The following publishers have manuals containing diagnostic information for electronic engine control and ignition systems. Contact the publishers for availability and pricing, specifying the make, model and year of your vehicle. Some manuals may be available at auto parts stores or your local public library. Vehicle Service Manuals from General Motors Corporation...

  • Page 3: Table Of Contents

    Index Section Vehicle Service Information ... Inside front cover Safety Precautions ... ii Tester Basics ... 1-1 Testing Sensors ... • Troubleshooting Tips ... 2-1 • Engine Coolant Temperature ... 2-2 • Inlet Air Temperature ... 2-3 • Throttle Position (TP) ... 2-6 •...

  • Page 4: Safety First

    Safety First General Safety Guidelines to Follow When Working on Vehicles • Always wear approved eye protection • Always operate the vehicle in a well-ventilated area. Do not inhale exhaust gases – they are very poisonous! • Always keep yourself, tools, and test equipment away from all moving or hot engine parts.

  • Page 5: Tester Basics

    Section — Description of Controls and Accessories — Installing and Checking the 9 Volt Battery Note: Detailed procedures for testing sensors and ignition modules are located in Section 2 (sensors) and Section 3 (ignition modules). RANGE Switch FUNCTION Switch Tester Basics Controls power to the Tester and selects measure- ment range sensitivity (as required by various...

  • Page 6: Testing Ignition Modules

    Section 1 A single TEST light turns on to show the level of a measured signal (voltage, resistance or frequency). When signal values are low, the TEST TEST light is off or near the bottom of the column. The TEST light moves higher up the column as the signal level increases.
  • Page 7 IGNITION MODULE & IGNITION MODULE & ENGINE SENSOR TESTER ENGINE SENSOR TESTER RANGE FUNCTION SIGNAL 2) SET FUNCTION TO OHMS. 3) DISCONNECT ALL LEADS. O.K. IF TOPMOST TEST LIGHT IS ON. WEAK IF ANOTHER LIGHT IS ON. Allows test lead to probe sensor circuits when the sensor is connected to vehicle wiring harness.

  • Page 8: Installing The Battery

    Section 1 Jumper Lead Connector Pin Adapters Sensor Tester Power HIGH TEST POWER OFF RANGE VOLTS OHMS FREQUENCY FUNCTION Tester Basics Used when checking some ignition modules. Makes extra connections as required for testing. Used for easier attachment of test leads to certain sensor or wiring connector pins.

  • Page 9: Testing Sensors

    Section 2 Section Troubleshooting Tips HVAC CRUISE CE BOOSTER G GAP BRAKE BOOSTER FUEL PRESS U.S.A. REG. TO TRANS MODE FRONT OF CAR 12RAC8 Testing Sensors Save yourself time! Always begin with a thorough visual and “hands-on” inspection. You can often find the cause of many problems by just looking.

  • Page 10: Engine Coolant Temperature

    Section 2 Typical Engine Coolant Temperature Sensor What is It? How is It Used? Location When to Test What to Inspect Engine TEMPERATURE HIGH SENSOR RESISTANCE The engine temperature sensor is a thermistor - a resister whose resistance changes with tempera- ture.
  • Page 11 Typical Air Temperature Sensor What is It? How is It Used? Location When to Test What to Inspect Air TEMPERATURE HIGH SENSOR RESISTANCE The air temperature sensor is a thermistor - a resister whose resistance changes with temperature. The hotter the sensor gets, the lower the resistance becomes.

  • Page 12: Inlet Air Temperature

    Section 2 Temperature Sensor Test Procedure Use this procedure for testing all engine coolant or inlet air temperature sensors. Exceptions: • Certain Toyota, Nissan and Ford engines using vane airflow sensors have the air temperature sensor built into the vane airflow assembly. Refer to page 2-40 for testing.
  • Page 13 Engine Air TEMPERATURE 6) Verify test clips make good contact and do not touch each other. Make sure red and green test clips are not touching anything. HIGH 7) Set RANGE switch to HIGH. POWER OFF RANGE 8) Set FUNCTION switch to OHMS. VOLTS OHMS 9) Note TEST light position on tester.
  • Page 14 Section 2 TYPICAL THROTTLE POSITION SENSORS What Throttle Position Sensor is It? The throttle position sensor is a potentiometer - a type of variable resistor (similar to a dashboard dimmer control). These sensors come in a wide variety of styles - some with connectors at the end of a short wire “pigtail”.
  • Page 15 THROTTLE POSITION Sensor/Switch • Sometimes a second switch is used to signal a wide open throttle condition. This switch is normally open (or closed - depends upon vehicle) when the throttle is at idle or just partially open. The switch operates when the throttle is opened beyond a certain point.
  • Page 16 Section 2 Throttle Position Sensor Connectors = Test A, page 2-10 = Test B, page 2-12 Note: If the Red and Black test lead hook-ups are reversed, the TEST light will move in the opposite direction during Test A. This does not affect the accuracy of the test or harm the sensor. Yellow Black GM, FORD, CHRYSLER, HONDA...
  • Page 17 THROTTLE POSITION Sensor/Switch TOYOTA Yellow Black Yellow Black Yellow Black Some sensors have cable attached here. Testing is identical. TOYOTA/NISSAN Yellow Black Not used on some vehicles. Perform this test only if vehicle Black Yellow mating connector has 3 wires. Yellow Black Black...
  • Page 18 Section 2 TEST A - Throttle Position Sensor Important: If more than one hook-up is shown, it means more than one test is required to check all parts of the sensor. Do all tests shown for your sensor. The letter next to the hook-up refers to the test procedure. Sensor may be tested on or off vehicle.
  • Page 19 THROTTLE POSITION Sensor/Switch 7) Honda only: 1988-92 Civic and CRX – Remove vacuum hose from dashpot diaphragm. – Apply 20 in. Hg to the dashpot diaphragm using a hand vacuum pump. – The dashpot diaphragm is part of the throttle body assembly.
  • Page 20 Section 2 TEST B - Throttle Position Switch Important: If more than one hook-up is shown, it means more than one test is required to check all parts of the switch. Do all tests shown for your switch. The letter next to the hook-up refers to the test procedure. Switch may be tested on or off vehicle.
  • Page 21 THROTTLE POSITION Sensor/Switch HIGH 7) Set RANGE switch to HIGH. POWER OFF RANGE 8) Set FUNCTION switch to OHMS. VOLTS OHMS 9) Operate sensor - Watch TEST light for results. FREQUENCY FUNCTION On-Car test: Slowly move throttle linkage back and forth from idle to wide open position.
  • Page 22 Section 2 What is it? HIGH SENSOR VOLTAGE MIN. VALVE OPENING How it is used? Location When to Test What to Inspect 2-14 Testing Sensors FORD EGR Valve This sensor is a potentiometer - a type of variable resistor (similar to a dashboard light dimmer control).
  • Page 23 EGR Valve Position/Lift Sensors EGR Valve Position Sensor Test Procedure Sensor may be tested on or off vehicle. Warning: Observe all safety precautions (see page ii) if testing sensor on vehicle. 1) Verify ignition key is OFF. 2) Check Tester battery 3) Disconnect wiring harness from sensor - Inspect 4) Off-Car testing only: Remove sensor.
  • Page 24 Section 2 Testing Sensors Off-Car test: Slowly push sensor element back and forth from end to end. • Good Sensor - TEST light smoothly moves up or down as sensor is operated. (The TEST light may go off if it moves to the bottom of the column - this is O.K.) Range of TEST light movement varies with sensor type and vehicle mounting.
  • Page 25 EGR Valve Position/Lift Sensors Sensor Connectors Note: If the Red and Black test lead hook-ups are reversed, the TEST light will move in the opposite direction during the test. This does not affect the accuracy of the test or harm the sensor.

  • Page 26: Oxygen

    Section 2 Testing Sensors Typical Oxygen Sensor What is It? The oxygen sensor is a zirconium dioxide ceramic mounted in the tip of a threaded metal housing. The tip is perforated to protect the sensing element but still allow exhaust gases to pass through. The sensor produces a voltage signal based on the amount of oxygen it contacts.
  • Page 27 HIGH SENSOR VOLTAGE Lean OPTIMUM AIR FUEL MIXTURE When to Test Inspection IMPORTANT: Rich • Related trouble codes sent by computer. • Driveability problems such as rough running, hesitation, stumble, poor fuel economy, poor performance, black exhaust smoke. Sensor operation (see page 2-21). Poor connec- tions at the sensor or computer.
  • Page 28 Section 2 Testing Sensors Sensor Types 1-Wire: Single wire goes to sensor SIGNAL. Sensor housing is connected to sensor GROUND. 2-Wire: One wire goes to sensor SIGNAL. Second wire goes to sensor GROUND. Refer to vehicle service manual for wire identification. (Sensor wire is often black.) 3-Wire: Two wires (often the same color) go to the sensor heating element.
  • Page 29 Heating 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 this test. Go directly to On-Car Test (page 2-22). Warning: Observe all safety precautions (see page ii) if testing sensor on vehicle. 1) Verify ignition key is OFF.
  • Page 30 Section 2 Important: Reliable testing of the oxygen sensor while on-vehicle is very difficult because test conditions cannot be well controlled. If the sensor responds during on-car testing, then it is probably good and no other testing is necessary. If the sensor does not seem to respond when tested on-car, remove it and perform the off-car test before deciding whether or not the sensor is bad.
  • Page 31 8) Observe RICH/LEAN lights during fast idle. • The TEST light column also indicates sensor voltage, but it is easier to check operation by watching the RICH/ LEAN lights.) • Maintain throttle partially open (2000 RPM idle). – IF the RICH/LEAN lights flash back and forth every 3 seconds or less...
  • Page 32 Section 2 Warning: This test involves use of an open flame from a propane torch. Observe all safety precautions for torch operation. Do not use near flammable material or gases. HIGH POWER OFF RANGE VOLTS OHMS FREQUENCY FUNCTION 2-24 Testing Sensors Off-Car Test 1) Verify ignition key is OFF.
  • Page 33 11) Observe RICH/LEAN lights while operating sensor. • After sensor tip is hot. move the flame until the sensor tip is completely surrounded by the flame. This keeps oxygen away from the tip. See Fig. 2. – Good Sensor: RICH light turns ON within 3 seconds indicating a “rich”...

  • Page 34: Engine Knock

    Section 2 Yellow Black What is It? How it is used? Location When to Test What to Inspect 2-26 Testing Sensors The knock sensor is a piece of piezoelectric material mounted in a metal housing. The sensor acts like a microphone - it changes vibrations into a small AC voltage signal.

  • Page 35: Engine Knock

    Knock Sensor Test Procedure Sensor may be tested on or off vehicle. Warning: Observe all safety precautions (see page ii) if testing sensor on vehicle. 1) Verify ignition key is OFF. 2) Check Tester battery (refer to page 1-4). 3) Disconnect wiring harness from sensor - Inspect for damage.
  • Page 36 Section 2 Testing Sensors FORD GM/CHRYSLER TOYOTA/HONDA Manifold Absolute Pressure (MAP) Sensor Barometric Pressure (BARO) Sens What is It? This sensor is an electronic module which sends a signal to the computer indicating atmospheric pressure and/or engine vacuum. Depending upon sensor type, the signal may be a dc voltage or a frequency.
  • Page 37 Manifold Absolute Pressure MAP/BARO Location When to Test Vehicle GM/CHRYSLER Harness Connectors for MAP Sensor (Mating side of connector shown.) HONDA Ground Power Signal Refer to vehicle service manual for connectors not shown. The sensor is mounted either on the bulkhead, air cleaner, throttle body or elsewhere in the engine compartment.
  • Page 38 Section 2 Manifold Absolute Pressure (MAP) Sensor Testing is done on-vehicle. Warning: This test involves running the engine. Observe all safety precautions (see page ii). Work in well-ventilated area. Yellow Backprobe 2-30 Testing Sensors Test Procedure 1) Verify ignition key is OFF. 2) Check Tester battery Refer to page 1-4.
  • Page 39 Manifold Absolute Pressure MAP/BARO HVAC CRUISE CE BOOSTER G GAP BRAKE BOOSTER FUEL PRESS U.S.A. REG. TO TRANS MODE FRONT OF CAR 12RAC8 • Note: If the TEST light is OFF a problem exists. Go to step 9 and continue testing to find cause.
  • Page 40 Section 2 HIGH POWER OFF RANGE VOLTS OHMS FREQUENCY FUNCTION TEST 2-32 Testing Sensors 11) Check MAP sensor power circuit. Keep sensor connected to vehicle wiring. • YELLOW test lead to sensor POWER circuit. Use backprobe adapter. • BLACK test lead to good vehicle GROUND. •...
  • Page 41 Manifold Absolute Pressure MAP/BARO HIGH POWER OFF RANGE VOLTS OHMS FREQUENCY FUNCTION 14) Check MAP signal wire for short to ground. •Verify ignition key OFF and MAP sensor wiring harness disconnected. • RANGE on LOW. • FUNCTION on OHMS. • YELLOW test lead to MAP signal pin on vehicle harness connector.

  • Page 42: Mass Air Flow (Maf)

    Section 2 Mass Air Flow (MAF) Sensors What is It? How it is used? Location When to Test 2-34 Testing Sensors FLOW Typical Sensor This sensor is an electronic module which sends a signal to the computer indicating the amount of air entering the engine.
  • Page 43 Vehicle Harness Connectors for MAF Sensor (Mating side of connector shown.) POWER MAF SIGNAL GROUND 1988 and Older RANGE on LOW FUNCTION on FREQUENCY POWER GROUND MAF SIGNAL 1989 and Newer RANGE on HIGH FUNCTION on FREQUENCY Ford NOTE: MAF RETURN is not connected to vehicle GROUND.
  • Page 44 Section 2 Vehicle Harness Connectors for MAF Sensor Nissan Ground Power Signal Pulsar NX SE All except 1987-88 Signal 1985-86 Maxima 1985-86 300ZX 1985-86 300ZX Turbo Power Ground 1987-88 Maxima 1987-88 200SX SE 1987-89 300ZX Ground Signal 1989 and Up Maxima 1990 and Up 300ZX Power Return*...
  • Page 45 Mass Air Flow (MAF) Sensor Test Procedure Testing is done on-vehicle. Warning: This test involves running the engine. Observe all safety precautions (see page ii). Work in well-ventilated area. Mass Air Flow MAF 1) Verify ignition key is OFF. 2) Check Tester battery Refer to page 1-4.
  • Page 46 Section 2 HIGH POWER OFF RANGE VOLTS OHMS FREQUENCY FUNCTION TEST 2-38 Testing Sensors – Note: If test results are O.K. but a computer trouble code indicates a bad sensor signal, the wire between the sensor signal pin and the computer may be open.
  • Page 47 12) Check MAF sensor ground circuit. • Same set-up as previous step, but move YELLOW test lead to sensor GROUND circuit. Do not probe MAF RETURN pin. Use backprobe adapter. Good ground circuit: TEST light OFF. Go to next step. Bad ground circuit: Any TEST light ON.

  • Page 48: Vane Air Flow

    Section 2 Vane Air Flow Sensors What is It? How it is used? Location When to Test What to Inspect 2-40 Testing Sensors AIR FLOW This sensor sends a dc voltage signal to the computer indicating the amount of air entering the engine. The voltage signal increases as the air flow increases.
  • Page 49 Sensor Connectors Yellow Black Black Yellow Black Yellow Yellow Black Black Yellow Yellow Black Refer to vehicle service manual for connectors not shown. Vane Air Flow VAF Toyota *Toyota uses two sensor types. Try hook-up #1 first. If good Black test results are not obtained, retest using...
  • Page 50 Section 2 All Air Flow Meter Sensor Tests IMPORTANT: • Test all hook-ups shown for the sensor. • The letter next to the hook-up refers to the test procedure for that hook-up. • Each hook-up should test O.K. Exception: If two hook-ups are marked with an asterisk (*) only one of the two hook-ups has to test O.K.
  • Page 51 TEST A - Air Flow Meter Sensor Warning: Observe all safety precautions (see page ii) if testing sensor on vehicle. 1) Do all Test Preparation steps. Refer to page 2-42. 2) Connect test leads. • Connect TEST leads according to diagram A in the component drawing.
  • Page 52 Section 2 TEST B - Air Temperature Sensor Warning: Observe all safety precautions (see page ii) if testing sensor on vehicle. 1) Do all Test Preparation steps. Refer to page 2-42. 2) Connect test leads. Connect TEST leads according to diagram B in the component drawing.
  • Page 53 Test C - Air Flow Meter Position Switch Warning: Observe all safety precautions (see page ii) if testing sensor on vehicle. 1) Do all Test Preparation steps. Refer to page 2-42. 2) Connect test leads. Connect TEST leads according to diagram C in the compo- nent drawing.

  • Page 54: Crankshaft/Camshaft Position

    Section 2 Wire Coil Magnet Computer Reluctance Sensor Operation Crankshaft/Camshaft Position sensors What is It How is It Used? • Magnetic Reluctance 2-46 Testing Sensors Tooth Reluctor Ring Rotation Air Gap — The computer needs to know rotational speed (or position) of the engine crankshaft/camshaft for controlling ignition and fuel injector systems.
  • Page 55 Crankshaft/Camshaft Position HALL SWITCH POWER GROUND SIGNAL Typical Hall Effect Sensor The computer determines rotational speed (or position) by measuring how fast (or when) pulses appear. Note: The voltage pulses get larger when the teeth pass by more quickly. Values can range from a fraction of a volt (crank RPM) to over a hundred volts (high RPM).
  • Page 56 Section 2 Where is — Crankshaft Position, Crank Angle, Flywheel, Distributor Pick-Up, Camshaft Position, Cylinder, TDC and RPM. The sensor is usually located inside the distributor (if the engine has one). Vehicles without a distributor have the sensor located in various places around the engine where it can be mechanically linked to the crankshaft or camshaft.

  • Page 57: Magnetic Reluctance Type

    Crankshaft/Camshaft Position Test A - Magnetic Reluctance Type Sensor Testing is done on-vehicle. DO NOT test vehicle speed or driveshaft type sensors since they require vehicle motion. Warning: Observe all safety precautions (see page ii) when testing sensor on vehicle. 1) Verify ignition key is OFF.
  • Page 58 Section 2 TEST 2-50 Testing Sensors Observe all safety precautions (see page ii) - engine may start or backfire. Note: Some computer systems will store a trouble code in memory (and turn on the “Check Engine” light) if engine is cranked with sensor disconnected. Ignore or erase the code after testing.
  • Page 59 Crankshaft/Camshaft Position Test B - Hall Effect Type or Optical Type Sensor Sensor may be tested on or off vehicle. Warning: Observe all safety precautions (see page ii) if testing sensor on vehicle. 1) Verify ignition key is OFF. 2) Check Tester battery 3) Disconnect wiring harness from sensor - Inspect 4) Off-Car testing only: Remove sensor.
  • Page 60 Section 2 PULSE 2-52 Testing Sensors On-Car test: Crank engine. STAY AWAY from moving engine parts. Observe all safety precautions (see page ii) - engine may start or backfire. Good sensor - PULSE light flashes or stays ON during cranking (varies with sensor type). Bad sensor - PULSE light OFF during cranking.
  • Page 61 Section 2 Section Troubleshooting Tips Testing Ignition Modules Save yourself time! Always begin with a thorough visual and “hands-on” inspection. You can often find the cause of many problems by just looking. Has the vehicle been serviced recently? Some- times things get reconnected to the wrong place, or not at all.
  • Page 62 Section 3 Ignition Module Test Procedure GM • Ford • Chrysler • Toyota • Honda • Nissan Important: • This test checks for “dead” modules causing a no-start. This test will not detect intermittent failures due to heat or engine vibration. •...
  • Page 63 IGNITION MODULES GM 7 & 8 pin modules only: – Reconnect test leads as shown in Test 2 diagram. – Observe PULSE light. It should NOT be flashing. If PULSE light flashes, module is bad. – Short pins E and R together using paper clip (or other metal jumper).
  • Page 64 Section 3 Testing Ignition Modules 4 and 5 pin Black Yellow Green Test clip must BUSHING touch both base plate and bushing BASE PLATE Black Yellow Green...
  • Page 65 7 pin Yellow Green Test 2 Yellow Green Blue Jumper Test 1 Black Green Black Green Blue Jumper Black Yellow Test clip must touch both base plate and bushing BUSHING BASE PLATE Black Yellow...
  • Page 66 Section 3 8 pin Test 1 Test 2 Testing Ignition Modules Green Yellow Green Yellow Blue Jumper SIDE VIEW GBRE VIEW Black SIDE VIEW GBRE VIEW Black...
  • Page 67 Ford Dura-Spark Blue Jumper Black Yellow Green Ford Blue Jumper Black SIDE VIEW Note: Dura-Spark ignition modules White come in several versions with different Black connector types. (or Black/Green) MODULE Make connections based on ignition Green module wire colors. Other module wires Orange not used for testing.
  • Page 68 Section 3 Ford TFI-IV Test 1: Connect leads as shown. Test 2: Move Green lead to pin 5. Black Ford TFI-IV Test 1: Connect leads as shown. Test 2: Move Green lead to pin 5. Testing Ignition Modules Other leads remain in original position Green SIDE VIEW...
  • Page 69 Chrysler 4 and 5 pin Black Yellow Green Magetic Reluctance Pick-up 5-pin type shown. 4-pin uses same hook-up. Yellow Black Green Hall Effect Pick-up...
  • Page 70 Section 3 Honda Black Green Yellow 3-10 Testing Ignition Modules 1 2 3 4 Green Yellow Black Yellow Green Connect BLACK test lead to igniter mounting holes or a metal ground inside distributor.
  • Page 71 Honda/Nissan Not present on some modules. Yellow Black Connect BLACK test lead to a good ground inside distributor. Yellow Green Test clip must touch both base plate and bushing Yellow Black Connect BLACK test lead to a good ground inside distributor.
  • Page 72 Section 3 Nissan Nissan One-Coil System (Photo pick-up) Nissan uses two types of connector wiring. Module is good if either hook-up tests O.K. Green Black 3-12 Green Testing Ignition Modules Pick-up pins Yellow Yellow Yellow Yellow Green Black Test clip must touch both base plate and bushing Bushing Base plate...
  • Page 73 Nissan Two-Coil System (Photo pick-up) Yellow Green Nissan uses two types of connector wiring. Module is good if either hook-up tests O.K. Green Green Black Black Yellow Green Black Black Yellow Yellow Not present on 3-13 some modules.
  • Page 74 Section 3 Toyota For Toyota modules not pictured, refer to vehicle service manual and connect as follows: • Red lead to battery pin • Yellow lead to coil pin • Black lead to module ground • Green lead to IGT pin 3-14 Testing Ignition Modules Black...
  • Page 75 Toyota Green BROWN BLACK Yellow Black Connect BLACK test lead to igniter mounting hole or good vehicle ground. C Ext I, T F Green Yellow 3-15...
  • Page 76 Section 3 Testing Ignition Modules Toyota Green Yellow Yellow Use a paper clip to connect test lead. Black Connect BLACK test lead to igniter mounting hole or good vehicle ground. Green 3-16...
  • Page 77 Toyota Green Black Connect BLACK test lead to igniter mounting hole or good vehicle ground. Yellow Use a paper clip to connect test lead. 3-17...
  • Page 78 Section 3 Toyota Yellow 3-18 Testing Ignition Modules Black Connect BLACK test lead to igniter mounting hole or good vehicle ground. Green Use a paper clip to connect test leads.
  • Page 79 Toyota Yellow Green Green Yellow Black Connect BLACK test lead to igniter mounting hole or good vehicle ground. 3-19...
  • Page 80 Section 3 Testing Ignition Modules Toyota Yellow Green Black Connect BLACK test lead to igniter mounting hole or good vehicle ground. 3-20...
  • Page 81 Toyota Green Yellow Yellow Green Connect BLACK test lead to igniter mounting holes. Green Yellow Black Green Yellow 3-21...
  • Page 82 Notes 3-22...
  • Page 83 Section 2 Section Circuit Voltage Checks This function is useful for checking the presence (or absence) of voltages throughout the vehicle electrical system (such as wiring, switches, relays, and connectors). It is safe for probing computer and sensor circuits. Warning: Observe all safety precautions when working on vehicles (see page ii). HIGH POWER OFF RANGE...

  • Page 84: Continuity Checks

    Section 4 Test wiring, ground connections, switch operation, relay contacts, or similar. Important: • Do continuity tests on unpowered circuits only. • Always make sure all connections are good. If necessary, scrape away corrosion, paint, etc. at the contact points. Warning: If working on-car, turn ignition key OFF and observe all safety precautions (see page ii).
  • Page 85 More Uses for the Ignition Module/Sensor Tester Continuity Checks (cont.) Yellow Black Yellow Black TEST TEST Switch Switch Closed Open Yellow Black Yellow Black 12 V 12 V TEST TEST Ground Connection Ground Connection...

  • Page 86: Diode Check

    Section 4 Tests diodes and rectifiers for proper operation. HIGH POWER OFF RANGE VOLTS OHMS FREQUENCY FUNCTION Yellow Fig. 1 Diode Checks 1) Set RANGE switch to HIGH. 2) Set FUNCTION switch to OHMS. 3) Connect TEST leads as shown in Figure 1. ( YELLOW to anode —...
  • Page 87 This warranty does not apply to damages caused by accident, alterations or improper or unreasonable use. Expendable items, such as batteries, fuses, lamp bulbs and flash tubes are also excluded from the scope of this warranty. Actron Manufacturing Company disclaims any liability for incidental or consequential dam- ages for breach of any written warranty on the unit.
  • Page 88 Actron Manufacturing Company 9999 Walford Avenue Cleveland, Ohio 44102-4696 ©1997, Actron Manufacturing Company ® Made in the U.S.A. Part No. 2-221301...

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