ASE H6 Transit Bus Electrical/Electronic Systems Test — Information & Free Practice
US · Examination information
100 free questions · Answer explanations · No signup required
ASE H6 Transit Bus Electrical/Electronic Systems Test
- Provider
- ASE; test delivery at Prometric test centers
- Format
- English, computer-delivered multiple-choice knowledge test; one correct answer per question; English-to-Spanish glossary available
- Exam questions
- Total questions: 60; Scored questions: 50; Unscored questions: 10; The total includes the scored and unscored questions.
- Time limit
- 90 minutes
Examination outline
General Electrical/Electronic System Diagnosis (32%)
- Verify complaints and reproduce conditions, including intermittent faults and road tests
- Check circuit continuity
- Measure applied voltages, circuit voltages and voltage drops
- Measure electrical/electronic current flow
- Interpret oscilloscope and graphing multimeter waveforms
- Measure circuit and component resistance
- Locate shorts, grounds and open circuits
- Diagnose battery drain with the master/key switch OFF
- Test circuit breakers, solid state current limiters and fuses
- Test spike suppression diodes/resistors and capacitors
- Test relays and solenoids
- Interpret electrical schematics and symbols
- Interpret ladder logic diagrams
- Interpret multiplex diagnostic LEDs
- Diagnose and repair computer communication multiplex systems and controllers
- Connect a laptop to multiplex controls and verify ladder logic inputs and outputs
- Replace and adjust switches, sensors and electronic components
- Use proper care and handling of electrical/electronic components
- Diagnose controller area network failures
Battery and Starting System Diagnosis and Repair (24%)
- Perform battery load and capacitance tests
- Determine battery state of charge from open circuit voltage
- Service batteries, cables, terminals and disconnects
- Repair battery boxes, mounts and hold downs
- Use appropriate slow or fast battery charging
- Jump-start a transit bus
- Perform starter circuit voltage drop tests
- Test and replace starter control circuit components
- Test and replace starters, relays and solenoids/switches
- Replace starters and inspect flywheel ring gear or flex plate
- Service cranking circuit battery cables and connectors
- Distinguish electrical, multiplex and mechanical causes of cranking faults and noises
Charging System Diagnosis and Repair (14%)
- Diagnose no-charge, low-charge and overcharge conditions
- Service alternator drives, pulleys, fans, filters, brackets and tensioners
- Test 12-volt and 24-volt charging output
- Perform charging circuit voltage drop tests
- Test, adjust and replace voltage regulators
- Maintain, test, repair and replace alternators
- Repair charging circuit connectors and wiring
- Check battery equalizer output, wiring and mounting
- Verify charging system circuit monitor operation
- Distinguish electrical, multiplex and mechanical charging malfunctions
Lighting Systems Diagnosis and Repair (14%)
- Diagnose headlight and daytime running light operation
- Test, aim and replace headlights
- Test and repair headlight and dimmer controls and circuits
- Test and repair parking, clearance and taillight circuits
- Test and repair dash lighting circuits
- Test and repair interior and exterior passenger lighting
- Test and repair stoplight circuits
- Diagnose turn signal and hazard light malfunctions
- Test and repair turn signal and hazard circuits
- Test and repair backup lights and warning devices
- Distinguish electrical and multiplex lighting malfunctions
Related Vehicle Systems Diagnosis and Repair (16%)
- Diagnose intermittent, high, low and absent gauge readings
- Diagnose CAN-driven gauge malfunctions
- Test and repair gauge circuit components
- Test and repair visual and audible warning device circuits
- Test, replace and calibrate electronic speedometer and odometer systems
- Test and repair horns and horn circuits
- Diagnose wiper operation, speed control and park faults
- Test and repair wiper motors and circuits
- Test and repair windshield washer motors and circuits
- Test and repair side view mirror motors, heaters and circuits
- Test and repair HVAC electrical components and circuits
- Test and replace engine cooling fan electrical controls
- Distinguish electrical, multiplex and mechanical body system faults
- Test and repair entrance door controls, solenoids and Hall effect, limit, reed and proximity switches
Examination sources
- hseries.html
Study Guides, Transit Bus Study Guide link to the acquired official PDF
- transit.pdf
page 3, Test Specification and Task List controlling statements
- transit.pdf
page 3, Task List coverage statement
- transit.pdf
page 29, H6 heading
- transit.pdf
page 29, complete Content Area table; all rows and column headers visually read in h6-page-29.png
- transit.pdf
page 29, Percentage of Test column A–E and total
- transit.pdf
page 29, Questions in Test column A–E and total
- transit.pdf
page 30, B and C task lists, read complete page
- transit.pdf
page 30, D task list, read complete page
- transit.pdf
page 31, E task list, read complete page through task 14
- transit.pdf
page 4, H6 initial certification row, full column headers and starred footnote; viewed counts-page.png
- transit.pdf
page 4, starred footnote
- needtoknow.pdf
page 3, How Do I Become Certified?, item 3
- transit.pdf
page 4, H6 certification testing time column
- needtoknow.pdf
page 4, Test Centers
- needtoknow.pdf
page 3, How Do I Become Certified?, items 1–2
- policies.html
Registration and Scheduling, 90-day policy
- experience.html
ASE Work Experience Requirements, testing before experience approval
- policies.html
Photo ID with Signature Policy, opening requirement
- needtoknow.pdf
page 3, English version and glossary policy
Related license preparation
This examination may be required or accepted as an alternative, depending on the license and application pathway.