HYBRID CONTROL SYSTEM, Diagnostic DTC:P2601-779

DTC Code DTC Name
P2601-779 Oil Pump Control Range / Performance

DESCRIPTION

Refer to the description for DTC P2601-777.

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DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate
P2601-779 Oil Pump Control Range / Performance

  • Abnormal power source voltage is detected by oil pump with motor assembly

  • Power source voltage input to oil pump with motor assembly is less than 6.96 V for 2 seconds or more with OIL PMP relay on

(1 trip detection logic)

  • OIL PMP fuse

  • Wire harness or connector

  • EV control ECU

  • Oil pump with motor assembly

Master Warning Light:

Comes on
Related Data List
DTC No. Data List
P2601-779

  • Motor Cooler Oil Pump Status

  • Target Motor Cooler Oil Pump Duty

  • Motor Cooler Oil Pump Relay

WIRING DIAGRAM

Refer to the wiring diagram for DTC P2601-777.

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CAUTION / NOTICE / HINT

Note

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


  • When troubleshooting the oil pump with motor assembly, check for the following conditions.


    • ATF temperature inside the oil cooler is 5°C (41°F) or more.

    • The ambient temperature sensor value is 5°C (41°F) or more.

  • After the repair, clear the DTCs and perform the following procedure to check that DTCs are not output.


    1. Turn the power switch on (IG).

    2. Enter inspection mode.

      Tech Tips

      Entering inspection mode activates the oil pump with motor assembly.

    3. Turn the power switch on (READY) and wait for 5 seconds or more.

PROCEDURE


  1. DTC OUTPUT (EV)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / EV / Trouble Codes.

    4. Check for DTCs.


      Powertrain > EV > Trouble Codes
      Result
      Result Proceed to
      P2601-779 only is output. A
      P0A08-264 is also output. B

    5. Turn the power switch off.


    B

    GO TO DTC CHART Click here

    A

  2. CHECK FUSES (OIL PMP)


    1. Remove the OIL PMP fuse from the motor compartment relay block.

    2. A01MJ9AC03
      *1 Motor Compartment Relay Block
      *2 OIL PMP Fuse

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      OIL PMP fuse terminals Always Below 1 Ω

    3. Install the OIL PMP fuse.

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FUSES (OIL PMP)

    OK

  3. CLEAR DTC


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / EV / Trouble Codes.


      Powertrain > EV > Trouble Codes

    4. Read and record the DTCs and freeze frame data.

    5. Clear the DTCs.


      Powertrain > EV > Clear DTCs

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

      Result
      Proceed to
      NEXT

    NEXT

  4. DTC OUTPUT (EV)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / EV / Trouble Codes.

    4. Check for DTCs.


      Powertrain > EV > Trouble Codes
      Result
      Result Proceed to
      P0A08-264 is output. A
      The DTC is not output. B

    5. Turn the power switch off.


    B

    CHECK INTERMITTENT PROBLEMS

    A

  5. CHECK HARNESS AND CONNECTOR (AUXILIARY BATTERY - OIL PUMP WITH MOTOR ASSEMBLY - BODY GROUND)


    1. Disconnect the cable from the negative auxiliary battery terminal.

    2. Disconnect the cable from the positive auxiliary battery terminal.

    3. Disconnect the No.1 integration relay connector.

    4. Disconnect the oil pump with motor assembly connector.

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

      A01MGR8C02
      *a

      Front view of wire harness connector

      (to Oil Pump with Motor Assembly)

      		 *b

      Rear view of wire harness connector

      (to No.1 Integration Relay)
      Standard Resistance
      Tester Connection Switch Condition Specified Condition Resistance
      Positive auxiliary battery terminal - 1C-1 Power switch off Below 2 Ω R1
      1A-4 - A8-4 (L) Power switch off Below 2 Ω R2
      A8-1 (OPG) - Body ground Power switch off Below 2 Ω R3
      OK
      Combined resistance (R1, R2 and R3) of each part in the wire harness is below 6 Ω.

    6. Reconnect the oil pump with motor assembly connector.

    7. Reconnect the No.1 integration relay connector.

    8. Reconnect the cable to the positive auxiliary battery terminal.

    9. Reconnect the cable to the negative auxiliary battery terminal.

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK EV CONTROL ECU


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter inspection mode.

      Tech Tips

      Entering inspection mode activates the oil pump with motor assembly.

    4. Turn the power switch on (READY).

    5. A01MGVWC03
      *a

      Component with harness connected

      (EV Control ECU)

      Connect an oscilloscope between the EV control ECU terminals specified in the table below, and measure the waveform.

      Item Content
      Terminal A28-34 (OPST) - G45-6 (E1)
      Equipment Setting 10 V/DIV., 20 ms/DIV.
      Condition

      Inspection mode

      Power switch on (READY)
      OK
      The waveform appears as shown in the illustration.

    6. Turn the power switch off.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE OIL PUMP WITH MOTOR ASSEMBLY Click here

    NG

    REPLACE EV CONTROL ECU Click here