Code No. P1A2A:
IGBT current (MCU)
ELECTRIC MOTOR UNIT CONTROL SYSTEM CIRCUIT
DIAGNOSIS CODE SET CONDITIONS
If the MCU detects overcurrent of the IGBT (inverter) when the EV-ECU control mode is
the driving mode, it will set the diagnosis code No. P1A2A.
PROBABLE CAUSES
- High-voltage harness check
- Malfunction of the MCU
- Malfunction of the motor (electric motor unit)
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STEP 1. High-voltage connector check: G-07, G-08, G-09
MCU high-voltage terminal
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Carry out the check on the high-voltage circuit while reading
carefully the precautions on handling a high-voltage vehicle. (Refer to  .)
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Wear the specified protection equipment during the check.
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(1)Shut down the high voltage.
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(2)Check that the following terminals are tightened to the specified torque. (Refer
to .)
- G-07, G-08, G-09 MCU high-voltage terminal
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Q.
Is the check result normal?
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 Go to Step 2.
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 Tighten the high-voltage terminal to the specified torque. (Refer to .)
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STEP 2. 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 "START" 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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Replace the MCU. (Refer to .) Then go to
Step 3.
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The diagnosis is complete.
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STEP 3. 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 "START" 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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Replace the motor (electric motor unit). (Refer to .)
Then go to Step 4.
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The diagnosis is complete.
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STEP 4. 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 "START" 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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The diagnosis is complete.
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Return to Step 1.
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