Code No. P1A1C:
Motor drive voltage rise (MCU)
DIAGNOSIS CODE SET CONDITIONS
If the smooth condenser voltage is kept at 400 V or more in the driving mode, the MCU
will set the diagnosis code No. P1A1C.
PROBABLE CAUSES
- Malfunction of the EV-ECU
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STEP 1. ?Check whether the diagnosis code is set.
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Check if the diagnosis code No. P0ABA for other systems is set to the MCU.
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Q.
Is the diagnosis code set?
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 Carry out troubleshooting for the diagnosis code No. P0ABA. (Refer to  .)
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 Go to Step 2.
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STEP 2. Use M.U.T.-III to confirm a diagnosis code of other systems.
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Check if the diagnosis code is set to the EV-ECU.
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Q.
Is the diagnosis code set?
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Carry out troubleshooting for the EV-ECU. (Refer to .)
Then go to Step 3.
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Go to Step 3.
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STEP 3. Check the main battery energy level gauge
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Check the battery level status with the main battery level indicator in the combination
meter.
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Q.
Is the check result normal?
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Go to Step 4.
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Charge the main battery. Then go to Step 5.
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STEP 4. M.U.T.-III data list
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Check the charging rate of the main battery in the BMU service data (refer to ).
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Data list
- Item No. 1 : State of charge (for control)
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Q.
Is the check result normal?
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Go to Step 5.
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Charge the main battery. Then go to Step 5.
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STEP 5. Diagnosis code recheck
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Check again if the diagnosis code is set to the MCU.
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(1)Erase the stored diagnosis code.
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(2)Set the electric motor switch from the LOCK (OFF) position to the ON position.
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(3)Set the electric motor switch to the LOCK (OFF) position, and start the electric
motor unit.
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(5)Check if the diagnosis code is set.
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Q.
Is the diagnosis code set?
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Return to Step 1.
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The diagnosis is complete.
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