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The first ASE-recommended step for imbalance is comparing module voltages with scan data to identify weak cells. ICE or exhaust tests are unrelated. ASE L3 emphasizes proper HV pack diagnostic sequencing.

Electrical insulation failure in MG2 windings causes erratic torque. ASE L3 highlights electrical testing for drive motors. Fuel, PCV, or O2 faults don’t cause torque fluctuations.

If input voltage exists but no output, the DC/DC control board is faulty. ASE L3 highlights converter electronics diagnostics. Injectors, throttle bodies, or fuses are not responsible.

The ABS hydraulic modulator controls brake blending between regenerative and friction braking. If malfunctioning, it causes jerky engagement or inconsistent pedal feel. ASE L3 focuses on understanding brake blending systems unique to hybrids. Battery fans and catalytic converters are unrelated. Auxiliary transmission pumps assist lubrication but do not directly affect brake blending.

Shorted windings cause excessive current draw, tripping inverter overcurrent protection. ASE L3 stresses inverter-motor fault relationships. MAP, injectors, or throttle bodies don’t match this.