HYBRID CONTROL SYSTEM PROBLEM SYMPTOMS TABLE

Hybrid Control System
Symptom Suspected Area See page
Cannot enter EV drive mode CAN communication system (w/ Central Gateway ECU)

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CAN communication system (w/o Central Gateway ECU)

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Combination meter sub-assembly

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EV drive mode switch (combination switch assembly)

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Pattern select switch EV mode circuit

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EV mode indicator light does not illuminate Combination meter sub-assembly

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EV drive mode switch (combination switch assembly)

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Pattern select switch EV mode circuit

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EV mode indicator light does not turn off Combination meter sub-assembly

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EV drive mode switch (combination switch assembly)

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Pattern select switch EV mode circuit

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Cannot enter POWER mode CAN communication system (w/ Central Gateway ECU)

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CAN communication system (w/o Central Gateway ECU)

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Combination meter sub-assembly

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POWER mode switch (combination switch assembly)

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Pattern select switch Power mode circuit

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POWER mode indicator light does not illuminate Combination meter sub-assembly

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POWER mode switch (combination switch assembly)

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Pattern select switch Power mode circuit

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POWER mode indicator light does not turn off Combination meter sub-assembly

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POWER mode switch (combination switch assembly)

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Pattern select switch Power mode circuit

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Cannot enter ECO mode CAN communication system (w/ Central Gateway ECU)

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CAN communication system (w/o Central Gateway ECU)

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Combination meter sub-assembly

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ECO mode switch (combination switch assembly)

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Pattern select switch ECO mode circuit

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ECO mode indicator light does not illuminate Combination meter sub-assembly

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ECO mode switch (combination switch assembly)

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Pattern select switch ECO mode circuit

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ECO mode indicator light does not turn off Combination meter sub-assembly

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ECO mode switch (combination switch assembly)

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Pattern select switch ECO mode circuit

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Hunting (Poor idle) Drive start control

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Hesitation and/or poor acceleration Brake override system

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Drive start control

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Loud rattle from hybrid vehicle transaxle Loud Rattle from Hybrid Vehicle Transmission

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Transmission input damper assembly

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Hybrid vehicle transaxle assembly

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Power switch does not turn on (READY). Entry and Start system (for start function)

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ECU power source circuit

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Hybrid vehicle control ECU

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ECM

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Power switch cannot be turned on (READY) after replacing HV battery, hybrid vehicle control ECU or ECM
  • Hybrid vehicle control ECU

  • ECM

Tech Tips

The hybrid vehicle control ECU and ECM vary by HV battery type. If the wrong type of hybrid vehicle control ECU or ECM is installed, the power switch cannot be turned on (READY).

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