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Code 25: Engine Torque Control Signal (SVX Model Only): Symptom

Engine torque control output signal circuit is open or shorted causing harsh shift feel.

  1. Measure signal voltage output of ECU (MPFI). Turn ignition on with engine not running. Measure signal voltage output of ECU (MPFI). DO NOT  disconnect connector.
  2. Measure voltage between pin No. 20 of connector B59 and vehicle body. See Figure . Voltage should be 4-5 volts. If voltage is not within specification, replace ECU and retest.
  3. Measure signal voltage input of TCU. Disconnect connector from TCU. Turn ignition on with engine not running. Measure signal voltage input of TCU. Measure voltage between pin No. 9 of connector B68 and vehicle body. See Figure -Figure .
  4. Voltage should be 4-5 volts. If voltage is not within specification, inspect and repair circuit. See appropriate wiring diagram in WIRING DIAGRAMS  . If circuit is okay, replace TCU and retest.
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