LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Mitsubishi >> 2012 >> i-MiEV ES >> Repair and Diagnosis (Single Page) >> Hybrid/Electric Powertrain >> Testing and Diagnosis >> Electric Motor Unit And Traction/Main Drive Lithium-Ion Battery - I-MIEV - Introduction & Diagnostic Trouble Code Chart >> EV-Ecu >> Diagnostic Function (2012) >> Fail Safe, Back Up Function >> Fail Safe, Back Up Function Item List
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Fail Safe, Back Up Function Item List

DTC Diagnostic item Fail-safe control
C2006 Power supply low voltage 2 (VP) Disables operation of the brake vacuum pressure system.
C2007 Power supply high voltage
C200A Brake electric vacuum pump main relay coil (VP)
C200E Brake electric vacuum pump main relay ON seizure (VP)
C200F Brake electric vacuum pump main relay OFF seizure (VP)
C2010 Brake electric vacuum pump control relay 1 coil system abnormality (VP) When the DTC C2011 is set
  • Disables operation of the brake vacuum pressure system.
  • Shuts off the brake electric vacuum pump main relay.
C2011 Brake electric vacuum pump control relay 2 coil system abnormality (VP) When the DTC C2010 is set
  • Disables operation of the brake vacuum pressure system.
  • Shuts off the brake electric vacuum pump main relay.
C2016 Brake electric vacuum pump control relay 1 (or 2) ON seizure (VP)
  • Disables operation of the brake vacuum pressure system.
  • Shuts off the brake electric vacuum pump main relay.
C2018 Brake electric vacuum pump control relay 1 OFF seizure (VP) When the DTC C2018 and C2019 are set simultaneously
  1. Disables operation of the brake vacuum pressure system.
  2. Shuts off the brake electric vacuum pump main relay.
C2019 Brake electric vacuum pump control relay 2 OFF seizure (VP)
C201A Brake electric vacuum pump motor seizure (VP)
  • Disables operation of the brake vacuum pressure system.
  • Shuts off the brake electric vacuum pump main relay.
C2020 Brake booster vacuum sensor power supply voltage abnormality (VP) Drives the brake electric vacuum pump intermittently. (Repeats 28-second stop and 2-second drive.)
C2021 Brake booster vacuum sensor failure output voltage (VP)
C2022 Brake booster vacuum sensor output value seizure (VP)
C202A Brake electric vacuum pump motor long-time current supply abnormality (VP)
C202E Brake electric vacuum pump operation monitoring (VP)
P00B3 Coolant temperature sensor (short to ground) Controls with the system coolant temperature at 65°C (149°F).
P00B4 Coolant temperature sensor (open circuit)
P0513 Incorrect immobilizer key Shut down the high voltage.
P0560 12-V control voltage abnormality (EMCU)
  • Sets the motor (electric motor unit) indication torque to 0 Nm.
  • Outputs the IGBT shutdown command.
P0562 Battery voltage (low voltage) Shut down the high voltage.
P060B ECU (A/D conversion error) When the self check result of the AD (analog digital) converter is abnormal
  • Restricts the motor (electric motor unit) output.
When the conversion time of the AD (analog digital) converter becomes timeout
  • Accelerator pedal position sensor
    1. Restricts the motor (electric motor unit) output.
  • Coolant temperature sensor
    1. Controls with the system coolant temperature at 65°C (149°F).
    2. Turns off the heater and air conditioner compressor.
  • Brake booster vacuum sensor
    1. Controls with the brake vacuum of 0 Pa.
  • Controls with the brake pedal stroke sensor voltage of 1.5 V.
P062F ECU (EEPROM error) Erases the diagnostic trouble code and freeze frame data.
P0646 A/C power supply relay circuit (low input) Turns off the A/C power supply relay.
P0691 Cooling fan LO relay circuit (low input) Turns off the cooling fan LO relay.
P0693 Cooling fan HI relay circuit (low input) Turns off the cooling fan HI relay.
P0705 Shift position switch -
P0A05 Water pump (drive signal line)
  • Stops the water pump.
  • Turns off the water pump power supply relay.
P0A0A Service plug switch Shuts down the high voltage at vehicle speed of 3 km/h or less.
P0A2A Motor coil temperature sensor (EMCU)
  • Sets the motor (electric motor unit) indication torque to 0 Nm.
  • Outputs the IGBT shutdown command.
P0A3D IGBT2 abnormal temperature rise (EMCU)
P0A51 Current sensor error (EMCU)
P0A78 IGBT continuation abnormality (EMCU) Shut down the high voltage.
P0A90 Motor overcurrent continuation abnormality (EMCU)
P0AA1 Main contactor (+) (seizure)
P0AA4 Main contactor (-) (seizure)
P0ABA Motor drive voltage sensor error (EMCU)
  • Stops charging.
  • Sets the motor (electric motor unit) indication torque to 0 Nm.
  • Outputs the IGBT shutdown command.
P0ABF Battery current sensor error (BMU)
  • Stops charging.
  • Sets the gauge of the energy usage indicator to the position at the electric motor switch OFF.
P0ADB Main contactor (+) circuit (low input) Shut down the high voltage.
P0ADF Main contactor (-) circuit (low input)
P0AE2 Charging contactor (seizure)
P0AE6 Charging contactor (low input)
P0AE7 Charging contactor (high input)
P0AED IGBT temperature sensor error (EMCU)
  • Sets the motor (electric motor unit) indication torque to 0 Nm.
  • Outputs the IGBT shutdown command.
P0C73 Water pump error (low speed)
  • Stops the water pump.
  • Turns off the water pump power supply relay.
P0C74 Water pump error (high speed)
P1A00 Accelerator pedal position sensor (main) power supply circuit
  • Restricts the motor (electric motor unit) output.
  • Restricts the vehicle speed when the accelerator pedal position sensor (sub) is also failed.
P1A01 Accelerator pedal position sensor (sub) power supply circuit
  • Restricts the motor (electric motor unit) output.
  • Restricts the vehicle speed when the accelerator pedal position sensor (main) is also failed.
P1A02 Shift position sw: P Flashes "P" on the selector lever position indicator of the combination meter.
P1A03 Shift position sw: R
  • Suspends the regenerative brake control.
  • Suppresses the motor (electric motor unit) output to restrict the vehicle speed.
P1A04 Shift position sw: N Flashes "N" on the selector lever position indicator of the combination meter.
P1A08 Inhibitor sw: P Flashes "P" on the selector lever position indicator of the combination meter.
P1A09 Inhibitor sw: R
  • Suspends the regenerative brake control.
  • Suppresses the motor (electric motor unit) output to restrict the vehicle speed.
P1A0A Inhibitor sw: N Flashes "N" on the selector lever position indicator of the combination meter.
P1A0B Inhibitor sw: D
  • Flashes "D", "E" or "B" on the selector lever position indicator of the combination meter when the selector lever is set to the D, E or B position.
  • Suppresses the motor (electric motor unit) output to restrict the vehicle speed.
  • Suspends the regenerative brake control.
P1A10 On board charger power supply relay circuit, low input Stops charging by the on board charger.
P1A11 On board charger power supply relay circuit, high input
P1A12 On board charger abnormal stop
P1A14 Quick charging contactor circuit (low input) Stops quick charging.
P1A15 High-voltage system error (1) Shut down the high voltage.
P1A16 High-voltage system error (2)
P1A17 High-voltage system error (3)
P1A18 EMCU shutdown circuit
P1A19 EMCU shutdown circuit (internal trouble)
P1A1A EMCU microcomputer internal error
P1A1B Motor drive voltage drop (EMCU)
  • Sets the motor (electric motor unit) indication torque to 0 Nm.
  • Outputs the IGBT shutdown command.
P1A1C Motor drive voltage high (EMCU)
  • Stops charging.
  • Inhibits the regenerative brake control.
  • Inhibits electric regeneration by the brake.
P1A1E EEPROM error (EMCU)
  • Suspends the regenerative brake control.
  • Suppresses the motor (electric motor unit) output to restrict the vehicle speed.
P1A1F Motor coil temperature rise (EMCU)
  • Sets the motor (electric motor unit) indication torque to 0 Nm.
  • Outputs the IGBT shutdown command.
P1A20 Motor speed error (EMCU)
P1A21 Motor resolver output value error (EMCU)
  • Sets the motor (electric motor unit) indication torque to 0 Nm.
  • Sets the gauge of the energy usage indicator to the position at the electric motor switch OFF.
  • Outputs the IGBT shutdown command.
  • Sets the motor (electric motor unit) speed to 0 RPM.
P1A22 Ultra high motor drive voltage (EMCU)
  • Sets the motor (electric motor unit) indication torque to 0 Nm.
  • Outputs the IGBT shutdown command.
P1A23 EV ECU mode unstable (EMCU)
P1A24 Ready waiting timeout (EMCU)
  • Stops charging.
  • Shut down the high voltage.
P1A25 Condenser discharge command ON waiting timeout (EMCU)
  • Sets the motor (electric motor unit) indication torque to 0 Nm.
  • Outputs the IGBT shutdown command.
P1A26 Condenser discharge command OFF waiting timeout (EMCU)
P1A27 EV-ECU torque command abnormality (EMCU)
P1A28 EV-ECU error (EMCU)
  • Stops charging.
  • Shut down the high voltage.
P1A29 Motor overcurrent (EMCU)
  • Sets the motor (electric motor unit) indication torque to 0 Nm.
  • Outputs the IGBT shutdown command.
P1A2A IGBT overcurrent (EMCU)
P1A2B Three-phase line error (EMCU)
P1A2C Shift position sw: D/E/B
  • Flashes "D", "E" or "B" on the selector lever position indicator of the combination meter when the selector lever is set to the D, E or B position.
  • Suppresses the motor (electric motor unit) output to restrict the vehicle speed.
  • Suspends the regenerative brake control.
P1A31 Cell voltage abnormal high (BMU)
  • Stops charging.
  • Shuts down the high voltage with the selector lever in the P position.
P1A32 Battery temperature abnormality (BMU)
  • Stops charging.
  • Shut down the high voltage.
P1A33 Cell voltage sensor error (BMU)
  • Stops charging.
  • Suppresses the motor (electric motor unit) output to restrict the vehicle speed.
  • Suspends the regenerative brake control.
P1A34 Battery temperature sensor error (BMU)
P1A38 CMU operation count error (BMU)
  • Stops charging.
  • Shut down the high voltage.
P1A39 Charging state signal error (BMU)
  • Turns off the heater and A/C air conditioner compressor.
  • Sets the energy level gauge of the combination meter to the 0 segment.
P1A3D AD reference voltage abnormality (EMCU)
  • Stops charging.
  • Sets the motor (electric motor unit) indication torque to 0 Nm.
  • Outputs the IGBT shutdown command.
P1A3E CPU ambient temperature high abnormality (EMCU)
P1A3F CPU temperature sensor error (EMCU)
P1A44 Electric leakage detection (BMU)
  • Suspends the regenerative brake control.
  • Restricts the motor (electric motor unit) output.
  • Shuts down the high voltage with the selector lever in the P position.
P1A45 Electric leakage sensor detection circuit error (BMU)
  • Suspends the regenerative brake control.
  • Restricts the motor (electric motor unit) output.
P1AF1 EMCU READY timeout Shut down the high voltage.
P1AF2 EMCU condenser discharge command F/B Inhibits the main contactor (+) seizure judgment.
P1AF3 BMU READY timeout Shut down the high voltage.
P1AF5 CMU ID automatic numbering error (BMU) When DTC U1090 is set
  • Stops charging.
  • Shut down the high voltage.
P1AF9 Quick charger initial check timeout Stops the quick charger.
P1AFA Quick charger READY timeout
P1AFB Quick charging time timeout
P1AFC Quick charging current error
P1AFD Quick charging voltage abnormality
P1AFE Quick charger error
P1AFF Quick charge port lock error
P1B00 Quick charger battery conformity error
P1B01 Quick charged vehicle error
P1B04 Maximum cell voltage abnormality during charging Shut down the high voltage.
P1B05 Minimum cell voltage abnormality during charging Stops charging.
P1B06 Maximum cell temperature abnormality during charging
P1B07 Total battery voltage abnormality during charging
P1B08 Condenser voltage abnormality during charging
P1B09 EMCU CAN timeout/Not equipped
  • Inhibits the traction control.
  • Suspends the regenerative brake control.
  • Suppresses the motor (electric motor unit) output to restrict the vehicle speed.
  • Changes the communication with EMCU from the CAN communication to the K-LINE (backup) communication.
P1B0A Quick charging contactor circuit (high input) Stops quick charging.
P1B0B ABS vehicle speed data error
  • Inhibits the traction control.
  • Inhibits electric regeneration by the brake.
  • Calculates the vehicles speed from the motor speed from EMCU.
P1B0C On board charging current error (overcurrent) Stops the on board charger.
P1B0D Quick charging current error (overcurrent) Stops the quick charger.
P1B19 Brake pedal stroke sensor high Inhibits electric regeneration by the brake.
P1B1A Brake pedal stroke sensor low
P1B1B Brake pedal stroke sensor power circuit
P1B21 On board charger output current error Stops the on board charger.
P1B22 FL wheel speed data error
  • Restricts the regenerative brake.
  • Inhibits electric regeneration by the brake.
P1B23 FR wheel speed data error
P1B24 RL wheel speed data error
P1B25 RR wheel speed data error
P1B26 Different diameter tires on front and rear wheels (when learning is completed)
  • Inhibits the traction control.
  • Restricts the regenerative brake.
P1B27 Different diameter tires on front and rear wheels (when learning is not completed)
P1B28 Shutdown at collision judgment
  • Shut down the high voltage.
  • Continues the high-voltage shutdown state even after restart.
P1B29 Regular charge port signal, short to power supply Shuts down the high voltage when the vehicle speed reaches 3 km/h (1.9 mph) is lower.
P1B2D VIN mismatch Shut down the high voltage.
P1B2F BMU battery pack type inappropriate Shut down the high voltage.
P1B30 Mismatch in the number of cells EV-ECU and BMU detect Shut down the high voltage.
P1B31 Brake fluid pressure sensor Controls with the brake fluid pressure of 0.3 MPa (0.04 psi).
P1B32 VIN verification timeout Shut down the high voltage.
P1B33 Battery low temperature (BMU)
  • Stops charging.
  • Restricts the regenerative brake.
  • Suppresses the motor (electric motor unit) output to restrict the vehicle speed.
P1B34 CMU sensor fail
  • Stops charging.
  • Shut down the high voltage.
P1B37 Brake pedal stroke sensor fixed Inhibits electric regeneration by the brake.
P2122 Accelerator pedal position sensor (main) low input
  • Restricts the motor (electric motor unit) output.
  • Restricts the vehicle speed when the accelerator pedal position sensor (sub) is also failed.
P2123 Accelerator pedal position sensor (main) high input
P2127 Accelerator pedal position sensor (sub) low input
  • Restricts the motor (electric motor unit) output.
  • Restricts the vehicle speed when the accelerator pedal position sensor (main) is also failed.
P2128 Accelerator pedal position sensor (sub) high input
P2138 Accelerator pedal position sensor (main/sub) output error Restricts the motor (electric motor unit) output.
P2805 Shift position switch (shift position, inhibitor) difference
  • Flashes "P", "N", "D", "E" or "B" on the selector lever position indicator of the combination meter when the selector lever is set to the P, N, D, E or B position.
  • Illuminates "R" on the selector lever position indicator of the combination meter when the selector lever is set to the R position.
  • Suppresses the motor (electric motor unit) output to restrict the vehicle speed. (When the selector lever is set to the R, D, E or B position)
  • Suspends the regenerative brake control. (When the selector lever is set to the R, D, E or B position)
U1073 Bus-off
  • Inhibits the traction control.
  • Suspends the regenerative brake control.
  • Suppresses the motor (electric motor unit) output to restrict the vehicle speed.
  • Changes the communication with EMCU and BMU from the CAN communication to the K-LINE (backup) communication.
U1080 V-CAN bus-off (EMCU)
  • Inhibits the traction control.
  • Suspends the regenerative brake control.
  • Suppresses the motor (electric motor unit) output to restrict the vehicle speed.
  • Changes the communication with EMCU from the CAN communication to the K-LINE (backup) communication.
U1081 V-CAN bus-off (BMU) Changes the communication with BMU from the CAN communication to the K-LINE (backup) communication.
U1102 ASC/TCL/ABS timeout/Not equipped
  • Inhibits the traction control.
  • Suspends the regenerative brake control.
  • Calculates the vehicles speed from the motor speed from EMCU.
  • Inhibits electric regeneration by the brake.
U1117 Immobilizer CAN timeout/Not equipped Shut down the high voltage.
U111C BMU CAN timeout Changes the communication with BMU from the CAN communication to the K-LINE (backup) communication.
U111D On board charger CAN timeout Stops the on board charging.
U1160 EV-ECU lost (EMCU)
  • Inhibits the traction control.
  • Suspends the regenerative brake control.
  • Suppresses the motor (electric motor unit) output to restrict the vehicle speed.
  • Changes the communication with EMCU from the CAN communication to the K-LINE (backup) communication.
U1161 EV-ECU lost (BMU) Changes the communication with BMU from the CAN communication to the K-LINE (backup) communication.
U116A Local CAN (for quick charger) bus-off Stops quick charging.
U116B Quick charger local CAN (for quick charger) timeout
U1801 Air bag communication line, short to ground Inhibits the shutdown at collision judgment of DTC P1B28.
U1802 Air bag communication line, open circuit/short to power supply
U1803 Air bag signal frame error
U1804 Air bag signal parity error
U1805 Air bag signal reception frequency error
U1806 Air bag signal reception data error
U1900 K-line between EMCUs slave lost Stops charging and sets the motor (electric motor unit) command torque to 0 Nm if any one of the following diagnostic trouble codes are set:
  • U1073, P1B09, U1160, or U1080
U1901 K-line slave lost among BMUs Stops charging and sets the motor (electric motor unit) command torque to 0 Nm if any one of the following diagnostic trouble codes are set:
  • U1073, U111C, U1161, or U1081
U1910 K-line between EMCUs reception error Stops charging and sets the motor (electric motor unit) command torque to 0 Nm if any one of the following diagnostic trouble codes are set:
  • U1073, P1B09, U1160, or U1080
U1911 K-line between BMUs reception error Stops charging and sets the motor (electric motor unit) command torque to 0 Nm if any one of the following diagnostic trouble codes are set:
  • U1073, U111C, U1161, or U1081
U1920 K-line error (EMCU) Sets the motor (electric motor unit) command torque to 0 Nm if any one of the following diagnostic trouble codes are set:
  • U1073, P1B09, U1160, or U1080
U1921 K-line error (BMU) Stops charging, commands IGBT shutdown, and sets the motor (electric motor unit) command torque to 0 Nm if any one of the following diagnostic trouble codes are set:
  • U1073, U111C, U1161, or U1081