Inspect and test crankshaft and camshaft position sensor(s); perform necessary action.
Lesson Plan for
AUT 188-189/AUT 293
Automotive Service Technology Section D/Automotive Special Problems
Course HS Title: / Automobile Service Technology/Special Problems / Program:KCTCS Courses included in HS Title: (Lesson is prepared for course highlighted.)
KCTCS Course No. / KCTCS Course Title
Introduction/Context / This lesson will instruct the student on how to inspect and test crankshaft and camshaft position sensor(s), and perform necessary action. Knowledge of these techniques and the skills required to correct problems associated with this task are necessary for a student to acquire if they wish to compete for high paying, high skilled jobs in an Automotive Repair Facility. Entry level technicians need to be able to perform this task to 100% accuracy. Incorrectly performing this task can lead to an automobile accident or create customer satisfaction issues.
Prepared By / School / Date:
Grade Level / No. Students / No.IEP's: / Lesson Length:
Task
Inspect and test crankshaft and camshaft position sensor(s); perform necessary action.
No. / Objective
1 / Given the proper tools and instruction, the student will be able to inspect and test crankshaft and camshaft position sensor(s), perform necessary action, and pass a written test covering the task with 100% accuracy.
Connections:
Skills Standards:OH 001
OH 002
OH 003
OD 002
OD 003
OD 005
Common Core Technical Standards:
TD-SYS-2
New Common Core Standards:
RST 11-12.2
RST 11-12 3
A-CED-4
N-Q-1
INSTRUCTIONAL MATERIALS/TECHNOLOGY
Teacher Designed Materials and Other Handouts
Textbooks and Workbooks
Tim Gilles / Automotive Service Inspection, Maintenance and Repair / Third / Thomson Delmar / 571
Chris Johanson / Auto Engine Performance and Drivability / 2004 / Goodheart Wilcox / 315-316
Web Addresses
Autoshop 101 / Autoshop / www.autoshop101.com
Today's Class / Melior / www.todaysclass.com
Equipment
As Needed / DVOM / Various
As Needed / Noid Light / Various
As Needed / Scan Tool / Various
As Needed / Spark Tester / Various
Content/Presentation/Demonstration Outline
CAMSHAFT POSITION SENSOR (CMP). Inform students that many ignition systems also have a camshaft position sensor (CMP) that tells the computer when the #1 cylinder is on the compression stroke. Explain that this information is used for sequencing the fuel injection system and to sequence coil firing with coil-on-plug and coil-near-plug ignition systems. Let students know that other distributorless systems fire the spark plug according to the CKP sensor, so camshaft position is not necessary. Many engines also have variable valve timing (VVT), which uses CMP sensor information to verify system operation. Some engine management systems use the CMP sensor to tell the sequential fuel injection system when to pulse.
TESTING CRANKSHAFT AND CAMSHAFT POSITION SENSORS. Teach students that on most vehicles, the crankshaft and camshaft position sensors control both the fuel and ignition systems. A faulty crankshaft or camshaft sensor will produce either a no-start condition or intermittent stalling. Explain that the test procedures for crankshaft and camshaft sensors are similar to those for pickup coils, Hall-effect, and magnetic pickup switches mounted in the distributor, but their location on or in the engine makes testing somewhat difficult. Tell students to visually inspect the sensor for a good connection to the harness and secure mounting to the engine. Let them know that there are three quick tests that you can perform to check crankshaft and camshaft sensors.
Instruct students that the first test is to crank the engine while monitoring engine rpm using a scan tool. If the scan tool reads low or no rpms while cranking, this is an indication of a possible problem in the crankshaft or camshaft sensor circuit.
The second test is to connect a spark tester to two or three adjacent spark plugs, one at a time, and crank the engine. If there is no spark, this is also a possible indication of a position sensor circuit problem. If some of the plugs wires produce a spark, let students know that the problem is most likely in the ignition module or coils.
The last test uses an injector harness “noid” light and a test light. First, tell students to use the noid light to test for injector pulse at two or three adjacent injectors. Have them pull the injector harness connectors, one at a time, install the light, and crank the engine. If injector pulse is present, the position sensors are most likely working and the problem is in another circuit.
Applications/Practice
Evaluation and feedback Prior to Testing or Lab Work
STUDENT ASSESSMENT:(Assess student progress with performance criteria.)
IMPACT--Reflection/Analysis of Teaching and Learning: (How did students’ progress in relation to the state objectives? Was the instruction successful? Analyze samples of student work particularly that which is unsatisfactory, for the purpose of planning further instruction.)
REFINEMENT--Lesson Extension and Follow-up: (To be filled in as the lesson is modified during initial planning and/or during the teaching learning process.)