Republic of the Philippines Department of Education National Capital Region DIVISION OF CITY SCHOOLS – MANILA Manila Education Center Arroceros Forest Park Antonio J. Villegas St. Ermita, Manila MOST ESSENTIAL LESSON IN AUTOMOTIVE TECHNOLOGY GRADE 9 QUARTER – 1 MODULE 5 - WEEK 5 MODULES 5-7 COMPETENCY: SERVICE AUTOMOTIVE BATTERY LESSON: DEMONSTRATE HE PROCEDURE IN REMOVING AND REPLACING THE BATTERY 0 PRE – TEST Directions: Encircle the letter of the correct answer. 1. When disconnecting the battery, the correct tools to use are: A. box wrench B. open wrench C. battery pliers D. a and c 2. The tool to remove the clamp of the battery is: A. battery clamp puller B. screw driver C. pry bar D b and c 3. In cleaning the corrosion and foreign matters on the battery tray, use: A. brush with baking soda and water B. oil C. gasoline D. none of the above 4. To first step to disconnect the battery is: A. remove the vent plug B. disconnect the insulated cable from the battery C. disconnect the ground cable from the battery D. put the transmission in park or reverse 5. In order to be sure that the battery is connected properly , it must be: A. cleaned B. displayed C. tested D. Transferred 6. In disconnecting the battery the correct tools used are: A. box wrench B. open wrench C. battery pliers D. a and c 7. The tool used in removing the battery clamp is: A. battery clamp puller B. screw driver C. pry bar D. b and c 8. In cleaning the corrosion and foreign matters on the battery tray, clean with: A. brush with baking soda and water B. oil C. gasoline D. none of the abov 9. The first step to disconnect the battery is: A. remove the vent plug B. disconnect the insulated cable from the battery C. disconnect the ground cable from the battery D. put the transmission in park or reverse 10. Some battery have wires connected to the battery: A. grounded cable B. insulated cable C. neutral cable D. none of the above 2 LOOKING BACK TO YOUR LESSON DIRECTION: Complete the puzzle by analyzing and answering each questions. (See question below) Cross! (two words) 1. It is corrosive and can burn skin or eyes. 3. Hazardous material associated with batteries. 5. (two words) May have seen sparfks fly when ;jumper cables are attached to a car battery. Down! 2. Batteries are heavy and require proper material handling equipment to lift them safetly. 4. It ignites easily and can cause fire or explosion. 3 The service life of automobile battery ranges from two years to three years depending on the type and its usage. In replacing battery, correct procedure must be observed to avoid damage to the electronic components of the vehicle. LESSON: Disconnecting and Connecting the Battery OBJECTIVE: A. Select appropriate tools and equipment in disconnecting and connecting the battery. B. Remove battery without causing damage to workplace, property, or vehicle. C. Follow the proper procedure in replacing battery. D. Follow proper procedure to prevent loss of vehicle’s electronic memory as per manufacturer’s standard. E. Observe personal safety in removing and replacing batteries LEARNING CONTENT: CONNECTING AND DISCONNECTING A BATTERY TIPS IN CONNECTING AND DISCONNECTING BATTERY: Connecting and disconnecting a battery from the vehicle is easy. A basic knowledge, skill and a healthy understanding about the battery is good enough. Working on a battery with vehicle using a conventional electrical connections is not much dangerous to worked with, but the battery of a vehicle equipped with electronics and computercontrolled system must be given great care and attention. Visual inspection of the battery before disconnection will give us a tentative idea on its physical condition. Parts to be cleaned and removed will give direction on the step-by-step procedure on which part to be removed first until it is completely disconnected from the electrical loads and ready for removal. Reminders must be kept in mind when reconnecting the battery. Its polarity, installation of clamps to terminals , and the use of appropriate tools and safety must be observed. CONNECTING AND DISCONNECTING A BATTERY SUPPLIES AND MATERIALS: - Memory holder ( for vehicles with electronics controlled system) - Baking soda and water - Rags - Brush/Copper brush TOOLS • Box wrench • Battery pliers • Combination wrench • Vice grip plier 4 EQUIPMENT - Vehicle trainer with battery or live vehicl PROCEDURE: 1. Connect a memory holder (a 9-volt battery and adaptor) to the cigarette lighter to keep the volatile memories alive, while the battery is disconnected from the vehicle. Note: This step is for the battery equipped with electronic/computer controlled system. Follow the manufacturer’s instruction to avoid overloading the 9-volt battery. 2. Disconnect the ground cable clamp using a box wrench or battery pliers. 3. Loosen the battery clamp with the use of appropriate wrench. Note: Some battery clamp are snap-fitted to lock. It needs hand pressure to unlock the clamp from the battery terminal). 4. Pull the battery clamp slowly from the battery terminal. Note: Do not use other pliers or open-end wrench. If the clamp sticks, use a battery clamp puller, do not pry the clamp off with screw driver or pry bar. This may break the cover. 5. Disconnect the insulated cable from the battery. Note: Some vehicles have wires connected to the insulated side of the battery cable. Be sure not to separate the wires. Wrapped it together with the insulated side of the battery cable. Fig. 1 Loosen the clamp bolt using open end wrench (http://www.google.com.ph.) 6. Remove the hold-down clamps and remove the battery. 7. Clean the battery tray and hold-down clamps. If these parts are made of metal, clean them with stiff brush and a solution of baking soda and water. 5 8. When connecting the battery, be careful not to connect the battery cable connections in wrong polarity with the battery terminals. The wrong polarity may cause high current flow which will damage the vehicle’s electrical components. 9. Coated with lithium grease or petroleum jelly, reconnect and tighten the insulated cable first then the ground cable. 10. Install and tighten the hold down clamps. 11. Removed the memory holder. 12. Test run the engine for battery operation. LESSON: REMOVING AND REPLACING BATTERY OJECTIVE: A. Select appropriate tools and equipment in removing and replacing the battery. B. Remove battery without causing damage to workplace, property, or vehicle. C. Follow the proper procedure in replacing battery. E. Observe personal safety in removing and replacing batteries LEARNING CONTENT: REMOVING AND REPLACING BATTERY When removing battery look for sulfate build-up in the form of a whitish or bluish residue around the battery terminals. Removing this residue can sometimes solve a faulty battery. DO NOT TOUCH THIS RESIDUE WITH YOUR BARE HANDS, as it can often contain dried sulfuric acid which could irritate your skin. Verify also if the battery has been recharged properly by driving constantly for 30 minutes (with minimal electrical usage, including the air conditioner). Finally, check the alternator. The alternator usually maintains a charge close to 13.8-14.2 volts in a properly functioning charging system. The battery should have 12.4-12.8 volts with the engine off, and with no accessory load. If determined that the battery problems cannot be attributed to any of the above, or if cracks or oozing liquid on the top of the battery are noticed, it is probably safe to proceed with replacement. Buy the correct replacement battery. To do this, know the kind of battery to be replaced. Its dimensions, car make, model and engine size. Bring these information to a local auto parts dealers. That is important because automotive batteries vary in size and electrical capacity and the replacement battery will match the size of the battery tray and support of the vehicle. Set up a secure working environment - Park the vehicle on a flat, level surface at a safe distance from traffic, sparks, or open flames. Put on the parking brake. Make sure the work area is smoke-free. Remember that electricity is not the only danger. Battery electrolyte solution contains sulfuric acid and water, which is highly corrosive, that is, it can burn your skin and produce a flammable gas. Put on apron, gloves, and safety goggles when working with battery. 6 Fig. 2. Vehicle parked on a flat, level surface. (http://www.wikihow.com/Change-a-Car-Battery SUPPLIES AND MATERIALS • • • • • Apron Safety goggles Gloves Soda solution Lithium grease TOOLS • • • • Box wrench(12x13) Screw drivers Battery clamp puller Wire brush EQUIPMENT • Engine mock-up • Vehicle • Replacement battery PROCEDURE A. REMOVING THE BATTERY: 1. For electronic equipped vehicle. Remove the cigarette lighter and plug the memory keeper into the lighter socket. A complementary metal–oxide–semiconductor (CMOS) will keep the PIN codes and settings for radios and navigation systems from getting erased when you disconnect the battery. If you don't have a memory keeper make sure you have all the PINs for your electronic equipment before you start working. You may wish to check your car manual to see what devices may be affected. 2. Open the hood and use the prop rod to keep it open. Most of the latest model cars have hoods that hold themselves up. 7 3. Locate the battery. The battery should be located in an accessible part on either side of the vehicle's frame. The battery is a rectangular box with two cables attached to it. Some cars have battery under the metting in the trunk, or inside the fender of the wheel well (The latter is often very difficult to remove). Fig. 3. Opening the hood of the vehicle. (Courtesy http://www.wikihow.com/Change-a-Car-Battery) of Fig. 3. Opening the hood of the vehicle. (Courtesy of http://www.wikihow.com/Change-a-Car-Battery) 4. Identify battery terminals. Locate the positive and the negative terminals. The positive terminal will have a plus sign and the negative terminal will have a minus sign. These signs are inscripted on the battery post terminals. Fig. 4. Location of battery in a vehicle. ( http://www.wikihow.com/Change-a-Car-Battery 5. Disconnect the negative terminal. Loosen the negative cable clamp with a wrench (Usually 8mm or 10mm) and slide it off from the battery terminal. If the cables are unmarked, label them so that they don't get mixed up (otherwise you may ruin your car's electric system later on). It is also important that you disconnect the negative terminal socket before the positive terminal socket. Otherwise, you may short circuit the positive terminal to a grounded part of the car. Fig. 5. Disconnect the negative terminal first http://www.wikihow.com/Change-a-Car-Battery 8 6. Disconnect the positive terminal. 7. Remove the car battery by unfastening the battery holder and remove any screws,clamps or bars holding the battery in place. Carefully lift the battery out of the car. Remember that a battery can weigh30 to 60 pounds, or 13.5 to 27 kilos, so if you have any back problems, get a helping hand. Fig. 6. Removing the car battery (http://www.wikihow.com/Change-a-Car-Battery) 8. Clean the terminal clamps and the battery tray. You can use a baking soda solution and a wire brush. If there's any severe corrosion, consider replacement by a mechanic. Otherwise, let the area dry before moving onto the next step. B. REPLACING THE BATTERY 9. Replace the battery - Place the new battery where you just removed the old battery out, with the positive and negative terminals on the correct sides. Connect all the screws, clamps or bars that may hold the battery in place. Fig. 7. Replacing the battery. (http://www.wikihow.com/Change-a-Car-Battery) 10. Reconnect the positive terminal. Tighten the clamps using a wrench. Fig. 8. Reconnecting the positive terminal first. (http://www.wikihow.com/Change-a-Car-Battery) 9 11. Reconnect the negative terminal. Tighten the clamp with the wrench. Apply battery lithium grease. Spray the terminals with lithium grease to prevent corrosion. Fig. 9. Applying battery lithium grease to prevent corrosion. (http://www.wikihow.com/Change-a-Car-Battery) 11. Close the hood - Shut the hood of your car firmly and start your car. Check that all the electronic devices are working properly. Fig. 10. Close the hood of the vehicle. (http://www.wikihow.com/Change-a-Car-Battery) 12. Dispose used battery at service garages, auto supply stores, and recycling centers. There may be a small fee for the service, but throwing the battery away as normal garbage is not an option. ACTIVITY NO.1 REMOVING AND REPLACING BATTERY ASSESSMENT OF PERFORMANCE Directions: This performance assessment determines your level of knowledge and mastery about removing and replacing the battery. Accomplish the checklist. Workmanship/Performance Points A. Quality of Work with Application of Safety Measures 35 - Exemplary 25 - Adequate 10 – Needs improvement B. Accuracy of Performance under a specified time 30 – All work is complete and correct 20 – Minor mistake or error 10 – Some of the work maybe incomplete/misdirected C. Proper use of tools/equipment with safety measures 35 – Select/use properly of tools/equipment 25 – Wrong handling of tools 10 – Tools are not suitable for the job TOTAL SCORE 10 RATING SCALE: Total Score Numerical Rating Descriptive Rating 29 – 35 91 - 100 22 – 28 86 - 90 15 - 21 81 - 85 Good 08 - 14 76 - 80 Fair 01 - 07 71 - 75 YOUR SCORE? ______ Best Better Needs Improvement PERFORMANCE LEVEL _______ 11 REFLECTIVE LEARNING SHEET 1st Quarter Learning Materials In Automotive Grade 9 WORKSHEET 5: Knowing Me Better Name:__________________ Teacher:_____________ Grade & Section:__________ School:______________ Score:_________ Date:__________ DIRECTION: The letter on the left are all mixed up. Arrange them to spell out the correct word. The clues on the rightside will help you. Write your answer to the answer sheet. 1. LALB TREHYMEDYROvent of the battery. To perform testing, insert the rubber tube into the 2. LOAFT RODMERETYH- It will float as the electrolyte is drawn from the batteries. 3. REYTARB- Source of the electricity and can be tested in two ways. 4. NACIONPRUTE- Make sure no electrolyte drips on the car or on you. 5. FICPECIS TYGRAVI- Show the table and its relationship with the state of charge. 12 POST - TEST Directions: Encircle the letter of the correct answer. 1. When disconnecting the battery, the correct tools to use are: A. box wrench B. open wrench C. battery pliers D a and c 2. The tool to remove the clamp of the battery is: A. battery clamp puller B. screw driver C. pry bar D. b and c 3. In cleaning the corrosion and foreign matters on the battery tray, use: A. brush with baking soda and water B. oil C. gasoline D. none of the above 4. To first step to disconnect the battery is: A. remove the vent plug B. disconnect the insulated cable from the battery C. disconnect the ground cable from the battery D. put the transmission in park or reverse 5. In order to be sure that the battery is connected properly , it must be: A. cleaned B. displayed C. tested D. Transferred 6. In disconnecting the battery the correct tools used are: A. box wrench B. open wrench C. battery pliers D. a and c 7. The tool used in removing the battery clamp is: A. battery clamp puller B. screw driver C. pry bar D. b and c 8. In cleaning the corrosion and foreign matters on the battery tray, clean with: A. brush with baking soda and water B. oil C. gasoline D. none of the above 9. The first step to disconnect the battery is: A. remove the vent plug B. disconnect the insulated cable from the battery C. disconnect the ground cable from the battery D. put the transmission in park or reverse 10. Some battery have wires connected to the battery: A. grounded cable B. insulated cable C. neutral cable D. none of the above 13 REFERENCES • • • • • • • • Swing Crispin, Frederic, Dictionary of Technical Terms The Bruce Publishing Co.: 1948. Chilton’s Easy Car Care. Chilton Book Company. 3rd Ed. Chilton Way, Radnor, PA 19089 Stockel, Martin W. Auto mechanics Fundamentals. The Goodheart - Willcox Company, Inc. 1978 The Oxford Dictionary of Current English. New Revised Ed. Oxford University Press, 1998. Popular Mechanics Guide To Auto Basic Repair and Maintenance. Book Division The Hearst Corporation, New York, NY Technology & Livelihood Education– Auto Grade 9 Learner’s Material First Edition, 2013 www.google.com.ph en.wikipedia.org Autotrainingcentre.com Let’s check! What is your score? Answer Key Pre- test 1. C 2. D 3. D 4. A 5. A 6. B 7. C 8. A 9. B 10.A Post – test 11. F 12. A 13. C 14. B 15. E 1. A 2. D 3. A 4. B 5. C 6. B 7. A 8. A 9. C 10. D 14 11. A 12. B 13. D 14.B 15. D
