Block 7 Quiz Engine Management

Ignition coil primary resistance typically measures:

• 0.2-1.0 Ω

• 2-5 Ω

• 10-15 Ω

• 20-30 Ω

A fuel injector pulse width of 8ms at idle indicates:

• Lean condition

• Rich condition

• Normal operation

• Clogged injector

Which component directly controls ignition timing advance?

• Crankshaft sensor

• Camshaft sensor

• Knock sensor

• ECU

Lambda sensor voltage oscillating between 0.1-0.9V indicates:

• Sensor failure

• Closed loop operation

• Open loop operation

• Heater circuit fault

EGR valve position at 75% during cruise suggests:

• Valve stuck open

• Valve stuck closed

• Normal operation

• Vacuum leak

Catalyst efficiency monitor (O2S12) compares:

• Upstream/downstream O2 signals

• Fuel trims/MAF readings

• ECT/IAT sensors

• Engine load/RPM

Service bulletin requires ignition coil replacement after P0351 code. You must:

• Replace coil

• Clear code

• Check wiring

• Update ECU software

Gasoline spill cleanup requires:

• Absorbent granules

• Ignition sources off

• Ventilation

• Water flush

Maximum noise exposure over 8 hours:

• 80 dB(A)

• 85 dB(A)

• 87 dB(A)

• 90 dB(A)

HV training required before working on:

• 12V systems

• 48V mild hybrids

• 100V+ hybrids

• All vehicles