Modern Automotive Technology Chapter 32
Transcript of Modern Automotive Technology Chapter 32
![Page 1: Modern Automotive Technology Chapter 32](https://reader033.fdocuments.net/reader033/viewer/2022051900/6284169486c89b64e0345650/html5/thumbnails/1.jpg)
Modern Automotive Modern Automotive TechnologyTechnology Chapter 32Chapter 32
Starting System Testing & RepairStarting System Testing & Repair
![Page 2: Modern Automotive Technology Chapter 32](https://reader033.fdocuments.net/reader033/viewer/2022051900/6284169486c89b64e0345650/html5/thumbnails/2.jpg)
Learning ObjectivesLearning ObjectivesDiagnose common starting system troublesMake orderly starting system testsR&R StarterExplain typical procedures for a starting motor rebuildDescribe safety practices to follow when testing or repairing starting systems
![Page 3: Modern Automotive Technology Chapter 32](https://reader033.fdocuments.net/reader033/viewer/2022051900/6284169486c89b64e0345650/html5/thumbnails/3.jpg)
Chapter 32Chapter 321. A Single Click SoundSingle Click Sound (noise) is usually
caused by the solenoid closing or the pinion gear contacting the flywheel gear.
2. A Discharged or Poorly Connected Discharged or Poorly Connected BatteryBattery can operate the lights but may not have enough power to operate the starting motor.
![Page 5: Modern Automotive Technology Chapter 32](https://reader033.fdocuments.net/reader033/viewer/2022051900/6284169486c89b64e0345650/html5/thumbnails/5.jpg)
Voltage TestVoltage Test
A voltmeter is A voltmeter is needed to verify needed to verify battery conditionbattery condition
![Page 6: Modern Automotive Technology Chapter 32](https://reader033.fdocuments.net/reader033/viewer/2022051900/6284169486c89b64e0345650/html5/thumbnails/6.jpg)
Chapter 32Chapter 32
3. A NoNo--CrankCrank condition happens when the engine crankshaft does not rotate when the ignition key is turned to the start position.
4. A Buzzing or Clicking NoiseBuzzing or Clicking Noise is caused by low current (amps) flow making the solenoid plunger rapidly kick in and out.
![Page 7: Modern Automotive Technology Chapter 32](https://reader033.fdocuments.net/reader033/viewer/2022051900/6284169486c89b64e0345650/html5/thumbnails/7.jpg)
Load TestLoad Test
Load Test to Load Test to determine current determine current
draw (load)draw (load)
![Page 8: Modern Automotive Technology Chapter 32](https://reader033.fdocuments.net/reader033/viewer/2022051900/6284169486c89b64e0345650/html5/thumbnails/8.jpg)
Chapter 32Chapter 32
5. A SlowSlow--Crank Crank condition occurs when the engine crankshaft rotates at speeds that are lower than normal.
6. A Voltage Drop TestVoltage Drop Test quickly locates a part (or circuit) with higher-than-normal resistance.
![Page 9: Modern Automotive Technology Chapter 32](https://reader033.fdocuments.net/reader033/viewer/2022051900/6284169486c89b64e0345650/html5/thumbnails/9.jpg)
Insulated Circuit Resistance Test Insulated Circuit Resistance Test
Insulated Insulated (Positive/B+ ) (Positive/B+ ) Circuit Circuit Resistance TestResistance Test
![Page 10: Modern Automotive Technology Chapter 32](https://reader033.fdocuments.net/reader033/viewer/2022051900/6284169486c89b64e0345650/html5/thumbnails/10.jpg)
Chapter 32Chapter 32
7. A Bent Armature ShaftBent Armature Shaft allows the armature to drag or rub on the field pole shoes.
8. A Starter Ground Circuit TestStarter Ground Circuit Test is used to check the circuit between the starting motor ground and the negative battery terminal.
![Page 11: Modern Automotive Technology Chapter 32](https://reader033.fdocuments.net/reader033/viewer/2022051900/6284169486c89b64e0345650/html5/thumbnails/11.jpg)
Voltage Drop TestVoltage Drop Test
Voltage Drop Voltage Drop (Ground Circuit) (Ground Circuit) Resistance TestResistance Test
![Page 12: Modern Automotive Technology Chapter 32](https://reader033.fdocuments.net/reader033/viewer/2022051900/6284169486c89b64e0345650/html5/thumbnails/12.jpg)
Chapter 32Chapter 32
9. The Pinion Gear ClearancePinion Gear Clearance is the distance between pinion and drive end frame with pinion engaged.
10. Starter ShimsStarter Shims are used to adjust the space between the pinion gear and the flywheel ring gear.
![Page 14: Modern Automotive Technology Chapter 32](https://reader033.fdocuments.net/reader033/viewer/2022051900/6284169486c89b64e0345650/html5/thumbnails/14.jpg)
Starter ShimsStarter Shims
Note starter Note starter shim locationshim location
![Page 15: Modern Automotive Technology Chapter 32](https://reader033.fdocuments.net/reader033/viewer/2022051900/6284169486c89b64e0345650/html5/thumbnails/15.jpg)
Chapter 32Chapter 32
11. The Starter Current DrawStarter Current Draw test measures the number of amps used by starting system.
12. A Metallic Grinding NoiseMetallic Grinding Noise may be caused by broken flywheel teeth or pinion gear teeth wear.
![Page 16: Modern Automotive Technology Chapter 32](https://reader033.fdocuments.net/reader033/viewer/2022051900/6284169486c89b64e0345650/html5/thumbnails/16.jpg)
Starter Motor Current DrawStarter Motor Current Draw
Starter Motor Current Draw Test Values
![Page 17: Modern Automotive Technology Chapter 32](https://reader033.fdocuments.net/reader033/viewer/2022051900/6284169486c89b64e0345650/html5/thumbnails/17.jpg)
Starting System TestingStarting System Testing
Grinding noise may be caused
by broken flywheel teeth or pinion gear
teeth wear
![Page 18: Modern Automotive Technology Chapter 32](https://reader033.fdocuments.net/reader033/viewer/2022051900/6284169486c89b64e0345650/html5/thumbnails/18.jpg)
Chapter 32Chapter 3213. A Battery Cable ConnectionBattery Cable Connection test is
performed by connecting a voltmeter to the battery post and to the cable and measuring the voltage drop across the connections while cranking the engine.
14. To test for a Bad Starter RelayBad Starter Relay, check the voltage going into and coming out of the terminals.
![Page 19: Modern Automotive Technology Chapter 32](https://reader033.fdocuments.net/reader033/viewer/2022051900/6284169486c89b64e0345650/html5/thumbnails/19.jpg)
Chapter 32Chapter 3215. A Humming SoundHumming Sound (Noise) is produced
when the motor armature spins rapidly.
![Page 20: Modern Automotive Technology Chapter 32](https://reader033.fdocuments.net/reader033/viewer/2022051900/6284169486c89b64e0345650/html5/thumbnails/20.jpg)
Battery Terminal TestingBattery Terminal Testing
Checking battery terminals for corrosionChecking battery terminals for corrosion and high resistanceand high resistance
![Page 21: Modern Automotive Technology Chapter 32](https://reader033.fdocuments.net/reader033/viewer/2022051900/6284169486c89b64e0345650/html5/thumbnails/21.jpg)
Solenoid TestingSolenoid Testing
Solenoid (Starter Solenoid (Starter Relay) TestingRelay) Testing
![Page 24: Modern Automotive Technology Chapter 32](https://reader033.fdocuments.net/reader033/viewer/2022051900/6284169486c89b64e0345650/html5/thumbnails/24.jpg)
Learning ObjectivesLearning ObjectivesDiagnose common starting system troublesMake orderly starting system testsR&R StarterExplain typical procedures for a starting motor rebuildDescribe safety practices to follow when testing or repairing starting systems