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DTC P2601-778: Oil Pump Control Range / Performance [11/2016 - ]: Procedure

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  1. CHECK THERMISTOR ASSEMBLY (AMBIENT TEMPERATURE SENSOR) 

    HINT: 

    The ambient temperature sensor value is used to detect DTC P2601-778. Check that the ambient temperature sensor operates normally, as the detection condition for DTC P2601-778 may be mistakenly detected due to a malfunction in the ambient temperature sensor.

    1. Following the troubleshooting procedures for the ambient temperature sensor, check that the ambient temperature sensor operates normally.

      Refer to INSPECTION [11/2016 - ]

      Result

      Proceed to
      OK
      NG

    Result:  2

    NG 

    REPLACE THERMISTOR ASSEMBLY (AMBIENT TEMPERATURE SENSOR) 

    Result:  1

    OK 

    See step  2

  2. CHECK OIL PIPE 
    1. Check that there is no clogging in the oil pipes connected to the oil pump with motor assembly, oil cooler assembly, and hybrid vehicle transaxle assembly.

      Result

      Proceed to
      OK
      NG

    Result:  2

    NG 

    REPAIR OR REPLACE OIL PIPE 

    Result:  1

    OK 

    See step  3

  3. CHECK CONNECTOR CONNECTION CONDITION (OIL PUMP WITH MOTOR ASSEMBLY) 
    1. Check the connector connections and contact pressure of the relevant terminals for the oil pump with motor assembly connector.

      Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE [02/2014 - ]

      OK

      The connector is connected securely and there are no contact problems.

      Result

      Proceed to
      OK
      NG

    Result:  3

    NG 

    CONNECT SECURELY 

    Result:  1

    OK 

    See step  4

  4. CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU ASSEMBLY CONNECTOR) 

    Refer to PROCEDURE - Step 1

    Result

    Proceed to
    OK
    NG

    Result:  3

    NG 

    CONNECT SECURELY 

    Result:  1

    OK 

    See step  5

  5. CHECK FUSE (OIL PMP) 
    1. Remove the OIL PMP fuse from the No. 1 engine room relay block and No. 1 junction block assembly.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      OIL PMP fuse Always Below 1 Ω
      GTY449711Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly
      *2 OIL PMP Fuse
    3. Install the OIL PMP fuse.

      Result

      Proceed to
      OK
      NG

    Result:  2

    NG 

    REPLACE FUSE (OIL PMP) 

    Result:  1

    OK 

    See step  6

  6. INSPECT OIL PMP RELAY 
    1. Remove the OIL PMP relay from the No. 1 engine room relay block and No. 1 junction block assembly.
    2. Measure the resistance according to the value(s) in the table below.
      GTY454454Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 OIL PMP Relay

      Standard Resistance

      Tester Connection Condition Specified Condition
      3 - 5 Auxiliary battery voltage not applied between terminals 1 and 2 10 kΩ or higher
      Auxiliary battery voltage applied between terminals 1 and 2 Below 1 Ω
    3. Install the OIL PMP relay.

      Result

      Proceed to
      OK
      NG

    Result:  2

    NG 

    REPLACE OIL PMP RELAY 

    Result:  1

    OK 

    See step  7

  7. CHECK HARNESS AND CONNECTOR (OIL PMP FUSE - OIL PMP RELAY) 
    1. Remove the OIL PMP fuse from the No. 1 engine room relay block and No. 1 junction block assembly.
      GTY449711Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly
      *2 OIL PMP Fuse
    2. Remove the OIL PMP relay from the No. 1 engine room relay block and No. 1 junction block assembly.
      GTY455133Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly
      *2 OIL PMP Relay
    3. Measure the resistance according to the value(s) in the table below.
      GTY429388Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly *2 OIL PMP Relay
      *3 OIL PMP Fuse - -

      Standard Resistance (Check for Open)

      Tester Connection Condition Specified Condition
      2 (OIL PMP fuse) - 3 (OIL PMP relay) Power switch off Below 1 Ω
      2 (OIL PMP relay) - Body ground Power switch off Below 1 Ω

      Standard Resistance (Check for Short)

      Tester Connection Condition Specified Condition
      2 (OIL PMP fuse) or 3 (OIL PMP relay) - Body ground and other terminals Power switch off 10 kΩ or higher
      NOTE:

      Do not apply excessive force when using the probes of the tester to perform the inspection. If excessive force is used, the terminals will be damaged.

    4. Install the OIL PMP relay.
    5. Install the OIL PMP fuse.

      Result

      Proceed to
      OK
      NG

    Result:  2

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result:  1

    OK 

    See step  8

  8. CHECK HARNESS AND CONNECTOR (OIL PUMP WITH MOTOR ASSEMBLY - OIL PMP RELAY) 
    1. Disconnect the A38 oil pump with motor assembly connector.
    2. Remove the OIL PMP relay from the No. 1 engine room relay block and No. 1 junction block assembly.
      GTY455133Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly
      *2 OIL PMP Relay
    3. Measure the resistance according to the value(s) in the table below.
      GTY450972Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly *2 OIL PMP Relay
      *a Front view of wire harness connector
      (to Oil Pump with Motor Assembly)      		 - -

      Standard Resistance (Check for Open)

      Tester Connection Condition Specified Condition
      A38-4 (L) - 5 (OIL PMP relay) Power switch off Below 1 Ω

      Standard Resistance (Check for Short)

      Tester Connection Condition Specified Condition
      A38-4 (L) or 5 (OIL PMP relay) - Body ground and other terminals Power switch off 10 kΩ or higher
      NOTE:

      Do not apply excessive force when using the probes of the tester to perform the inspection. If excessive force is used, the terminals will be damaged.

    4. Install the OIL PMP relay.
    5. Reconnect the A38 oil pump with motor assembly connector.

      Result

      Proceed to
      OK
      NG

    Result:  2

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result:  1

    OK 

    See step  9

  9. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU ASSEMBLY - OIL PMP RELAY) 
    1. Disconnect the A85 hybrid vehicle control ECU assembly connector.
    2. Remove the OIL PMP relay from the No. 1 engine room relay block and No. 1 junction block assembly.
      GTY455133Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly
      *2 OIL PMP Relay
    3. Measure the resistance according to the value(s) in the table below.
      GTY716085Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly *2 OIL PMP Relay
      *a Rear view of wire harness connector
      (to Hybrid Vehicle Control ECU Assembly)      		 - -

      Standard Resistance (Check for Open)

      Tester Connection Condition Specified Condition
      A85-2 (OPM2) - 1 (OIL PMP relay) Power switch off Below 1 Ω

      Standard Resistance (Check for Short)

      Tester Connection Condition Specified Condition
      A85-2 (OPM2) or 1 (OIL PMP relay) - Body ground and other terminals Power switch off 10 kΩ or higher
      NOTE:

      Do not apply excessive force when using the probes of the tester to perform the inspection. If excessive force is used, the terminals will be damaged.

    4. Install the OIL PMP relay.
    5. Reconnect the A85 hybrid vehicle control ECU assembly connector.

      Result

      Proceed to
      OK
      NG

    Result:  2

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result:  1

    OK 

    See step  10

  10. CHECK HARNESS AND CONNECTOR (OIL PUMP WITH MOTOR ASSEMBLY - BODY GROUND) 
    1. Disconnect the A38 oil pump with motor assembly connector.
    2. Measure the resistance according to the value(s) in the table below.
      GTY434377Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Oil Pump with Motor Assembly)

      Standard Resistance

      Tester Connection Condition Specified Condition
      A38-1 (OPG) - Body ground Power switch off Below 1 Ω
    3. Reconnect the A38 oil pump with motor assembly connector.

      Result

      Proceed to
      OK
      NG

    Result:  2

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result:  1

    OK 

    See step  11

  11. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU ASSEMBLY - OIL PUMP WITH MOTOR ASSEMBLY) 
    1. Disconnect the A85 hybrid vehicle control ECU assembly connector.
    2. Disconnect the A38 oil pump with motor assembly connector.
    3. Measure the resistance according to the value(s) in the table below.
      GTY687512Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Rear view of wire harness connector
      (to Hybrid Vehicle Control ECU Assembly)
      *b Front view of wire harness connector
      (to Oil Pump with Motor Assembly)

      Standard Resistance (Check for Open)

      Tester Connection Condition Specified Condition
      A85-34 (NOPM) - A38-2 (NOPM) Power switch off Below 1 Ω

      Standard Resistance (Check for Short)

      Tester Connection Condition Specified Condition
      A85-34 (NOPM) or A38-2 (NOPM) - Body ground and other terminals Power switch off 10 kΩ or higher
    4. Reconnect the A85 hybrid vehicle control ECU assembly connector.
    5. Reconnect the A38 oil pump with motor assembly connector.

      Result

      Proceed to
      OK
      NG

    Result:  2

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result:  1

    OK 

    See step  12

  12. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU ASSEMBLY - OIL PUMP WITH MOTOR ASSEMBLY) 
    1. Disconnect the A85 hybrid vehicle control ECU assembly connector.
    2. Disconnect the A38 oil pump with motor assembly connector.
    3. Measure the resistance according to the value(s) in the table below.
      GTY731112Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Rear view of wire harness connector
      (to Hybrid Vehicle Control ECU Assembly)
      *b Front view of wire harness connector
      (to Oil Pump with Motor Assembly)

      Standard Resistance (Check for Open)

      Tester Connection Condition Specified Condition
      A85-33 (OPM1) - A38-3 (OPM1) Power switch off Below 1 Ω

      Standard Resistance (Check for Short)

      Tester Connection Condition Specified Condition
      A85-33 (OPM1) or A38-3 (OPM1) - Body ground and other terminals Power switch off 10 kΩ or higher
    4. Turn the power switch on (IG).
    5. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      A85-33 (OPM1) or A38-3 (OPM1) - Body ground Power switch on (IG) Below 1 V
      NOTE:

      Turning the power switch on (IG) with the hybrid vehicle control ECU assembly connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

    6. Reconnect the A85 hybrid vehicle control ECU assembly connector.
    7. Reconnect the A38 oil pump with motor assembly connector.

      Result

      Proceed to
      OK
      NG
    8. Turn the power switch off.

    Result:  2

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result:  1

    OK 

    See step  13

  13. CHECK OIL PUMP WITH MOTOR ASSEMBLY 
    1. Disconnect the A85 hybrid vehicle control ECU assembly connector.
    2. Measure the resistance according to the value(s) in the table below.
      GTY695853Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Rear view of wire harness connector
      (to Hybrid Vehicle Control ECU Assembly)

      Standard Resistance

      Tester Connection Condition Specified Condition
      A85-33 (OPM1) - Body ground Power switch off 10 kΩ or higher
    3. Reconnect the A85 hybrid vehicle control ECU assembly connector.

      Result

      Proceed to
      OK
      NG

    Result:  2

    NG 

    REPLACE OIL PUMP WITH MOTOR ASSEMBLY. Refer to  COMPONENTS [02/2014 - ] 

    Result:  1

    OK 

    See step  14

  14. INSPECT OIL PUMP WITH MOTOR ASSEMBLY 
    1. Disconnect the A38 oil pump with motor assembly connector.
    2. Measure the resistance according to the value(s) in the table below.
      GTY447421Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Oil Pump with Motor Assembly)

      Standard Resistance

      Tester Connection Condition Specified Condition
      A38-3 (OPM1) - A38-4 (L) Power switch off 10 kΩ or higher
    3. Reconnect the A38 oil pump with motor assembly connector.

      Result

      Proceed to
      OK
      NG

    Result:  1

    OK 

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY. Refer to  COMPONENTS [11/2016 - ] 

    Result:  2

    NG 

    REPLACE OIL PUMP WITH MOTOR ASSEMBLY. Refer to  COMPONENTS [02/2014 - ] 

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