HYBRID CONTROL SYSTEM, Diagnostic DTC:P0ADF-229

DTC Code DTC Name
P0ADF-229 Battery Negative Contactor Control Circuit Low

DESCRIPTION

Refer to the description for DTC P0AE6-225.

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DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate
P0ADF-229 Battery Negative Contactor Control Circuit Low

Short to ground in the SMRG circuit:

Primary circuit of SMR (-) is malfunctioning.

(2 trip detection logic)

  • Wire harness or connector

  • EV battery junction block assembly

  • EV control ECU

Master Warning Light:

Comes on
Related Data List
DTC No. Data List
P0ADF-229

  • VL-Voltage before Boosting

  • VH-Voltage after Boosting

  • VB-Battery Voltage

  • SMRP Status

  • SMRB Status

  • SMRG Status

  • SMRP Control Status

  • SMRB Control Status

  • SMRG Control Status

  • Boosting Converter Shutdown

  • Drive Motor Inverter Shutdown

  • FC Air Compressor Inverter Shutdown

WIRING DIAGRAM

Refer to the wiring diagram for the EV battery high-voltage line circuit.

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CAUTION / NOTICE / HINT

CAUTION:


  • B006JFB
    B006JM4

    Before the following operations are conducted, take precautions to prevent electric shock by turning the power switch off, wearing insulated gloves, and removing the service plug grips from both FC stack assembly and EV battery.


    • Inspecting the high-voltage system

    • Disconnecting the low voltage connector of the inverter with converter assembly

    • Disconnecting the low voltage connector of the EV battery

    • Disconnecting the low voltage connector of the FC stack assembly

    • Disconnecting the low voltage connector of the FC converter assembly

      Tech Tips

      No removal order is specified for the service plug grips of the FC stack assembly and EV battery.

  • B006JBZ

    After removing the service plug grip from the EV battery, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system. After removing the service grip from the FC stack assembly, store it in a safe location and use the "HIGH-VOLTAGE, DO NOT TOUCH" sign to notify other technicians that you are working on the high-voltage system.

  • B000ZMTC04
    *a Without waiting for 10 minutes

    After removal of the service plug grips of both FC stack assembly and EV battery, wait for at least 10 minutes before touching the high-voltage connectors and terminals. After waiting for 10 minutes, check the voltage at the terminals in the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work.

    Click here

    Tech Tips

    At least 10 minutes are necessary to discharge the high-voltage capacitors inside the inverter with converter assembly and FC stack assembly.

Note


  • After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.

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  • When reinstalling the service plug grip to the FC stack assembly or the EV battery, slide the lever of the service plug until the letters "UNLOCK" are completely hidden, and insert it firmly.

    Click here

  • When the vehicle is parked with the power switch off, if the FC control ECU judges that the FC stack temperature will go below 0°C (32°F), it activates the FC air compressor, hydrogen pump and FC cooling water pump for a maximum of 180 seconds and drains water from the FC stack assembly. When performing inspection or repairs with the power switch off (not on (IG) or on (READY)), disconnect the cable from the negative (-) auxiliary battery terminal before performing work (If the auxiliary battery voltage is needed to conduct inspection, warm up the FC system beforehand).

Tech Tips


  • If DTC P0ADF-229 is output, the power switch cannot be turned on (READY).

  • After the repair, clear the DTCs, perform the following procedure and check that the same DTC (including pending DTC) is not output.


    1. Turn the power switch off and wait for 3 minutes or more.

    2. Turn the power switch on (READY) and wait for 30 seconds or more.

    3. Turn the power switch off and wait for 4 minutes or more.

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (EV CONTROL ECU - BODY GROUND)


    1. Disconnect the EV control ECU connector.

    2. B000ZTRC28
      *a

      Rear view of wire harness connector

      (to EV Control ECU)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      G45-1 (SMRG) - Body ground Power switch off 25.0 to 59.0 Ω

    3. Reconnect the EV control ECU connector.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE EV CONTROL ECU Click here

    NG

  2. CHECK HARNESS AND CONNECTOR (EV CONTROL ECU - EV BATTERY JUNCTION BLOCK ASSEMBLY)

    CAUTION:

    Be sure to wear insulated gloves.


    1. Check that the service plug grip is not installed to FC stack assembly and EV battery.

      Note

      After removing the service plug grip, do not turn the power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.

    2. Remove the No. 4 EV battery shield panel.

      Click here

    3. Disconnect the EV battery junction block assembly connector.

    4. Disconnect the EV control ECU connector.

    5. B000ZMDC16
      *a

      Rear view of wire harness connector

      (to EV Control ECU)
      *b

      Rear view of wire harness connector

      (to EV Battery Junction Block Assembly)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      G45-1 (SMRG) or Q16-3 (SMRG) - Body ground and other terminals Power switch off 10 kΩ or higher

    6. Reconnect the EV control ECU connector.

    7. Reconnect the EV battery junction block assembly connector.

    8. Install the No. 4 EV battery shield panel.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE EV BATTERY JUNCTION BLOCK ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR