HYBRID CONTROL SYSTEM, Diagnostic DTC:P2601-777

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DESCRIPTION

The power management control ECU (HV CPU) detects the MG1 and MG2 temperature based on signals from the generator and motor temperature sensors and activates the OIL PMP relay and oil pump driver (oil pump with motor assembly).

The power management control ECU (HV CPU) monitors OPST signals from the oil pump driver and detects malfunctions.

The oil pump with motor assembly is activated when:

1. MG1 temperature is 80°C (176°F) or more

2. MG2 temperature is 100°C (212°F) or more and the MG1 temperature is 70°C (158°F) or more

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INSPECTION PROCEDURE

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PROCEDURE

1. Click here

   CHECK OPERATION OIL PUMP WITH MOTOR ASSEMBLY

   
   

   1. Connect the intelligent tester to the DLC3.

   2. Turn the power switch on (IG).

   3. Enter inspection mode (Click here).

      Tip:

      Entering inspection mode activates the oil pump with motor assembly.

   4. Turn the power switch on (READY).

   5. 

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

      Item	Content
      Terminal	A80-33 (OPM1) - F97-6 (E1)
      Equipment Setting	10 V/DIV., 20 ms./DIV.
      Condition	Inspection mode Power switch on (READY)

      Result
      Result Proceed to Normal waveform A Waveform other than normal waveform for LHD B for RHD C No waveform (0 V) D No waveform (12 V) E

      Table 1. Text in Illustration

      *1	Component with harness connected (Power Management Control ECU)

   6. Turn the power switch off.

   
   
   • AClick here
   • BClick here
   • CClick here
   • DClick here
   • EClick here
2. Click here

   CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - OIL PUMP WITH MOTOR ASSEMBLY)

   
   

   1. Disconnect the A75 connector from the oil pump with motor assembly.

   2. Disconnect the A80 connector from the power management control ECU.

   3. 

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

      Standard Resistance (Check for Open)
      Tester Connection Switch Condition Specified Condition A75-3 (OPM1) - A80-33 (OPM1) Power switch off Below 1 Ω

      Standard Resistance (Check for Short)
      Tester Connection Switch Condition Specified Condition A75-3 (OPM1) or A80-33 (OPM1) - Body ground and other terminals Power switch off 10 kΩ or higher

      Table 2. Text in Illustration

      *1	Front view of wire harness connector (to Oil Pump with Motor Assembly)
      *2	Rear view of wire harness connector (to Power Management Control ECU)

   4. Connect the power management control ECU connector.

   5. Connect the oil pump with motor assembly connector.

   
   
   • OKClick here
   • NGClick here
3. Click here

   INSPECT OIL PUMP WITH MOTOR ASSEMBLY

   
   

   1. Disconnect the A80 and F97 connector from the power management control ECU.

   2. 

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition A80-33 (OPM1) - F97-6 (E1) Power switch off 10 kΩ or higher

      Table 3. Text in Illustration

      *1	Rear view of wire harness connector (to Power Management Control ECU)

      Result
      Result Proceed to OK (for LHD) A OK (for RHD) B NG C

   3. Connect the power management control ECU connector.

   
   
   • AClick here
   • BClick here
   • CClick here
4. Click here

   CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - OIL PUMP W/MOTOR ASSEMBLY)

   
   

   1. Disconnect the A75 connector from the oil pump with motor assembly.

   2. Disconnect the A80 connector from the power management control ECU.

   3. Turn the power switch on (IG).

   4. 

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

      Standard Voltage
      Tester Connection Condition Specified Condition A75-3 (OPM1) or A80-33 (OPM1) - Body ground Power switch on (IG) Below 1 V

      Table 4. Text in Illustration

      *1	Front view of wire harness connector (to Oil Pump with Motor Assembly)
      *2	Rear view of wire harness connector (to Power Management Control ECU)

      Note:

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

   5. Turn the power switch off.

   6. Connect the power management control ECU connector.

   7. Connect the oil pump with motor assembly connector.

   
   
   • OKClick here
   • NGClick here
5. Click here

   INSPECT OIL PUMP WITH MOTOR ASSEMBLY

   
   

   1. Disconnect the A75 connector from the oil pump with motor assembly.

   2. 

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition A75-3 (OPM1) - A75-4 (L) Power switch off 10 kΩ or higher

      Table 5. Text in Illustration

      *1	Component without harness connected (Oil Pump with Motor Assembly)

      Result
      Result Proceed to OK (for LHD) A OK (for RHD) B NG C

   3. Connect the oil pump with motor assembly connector.

   
   
   • AClick here
   • BClick here
   • CClick here
6. Click here

   REPLACE OIL PUMP WITH MOTOR ASSEMBLYClick here

7. Click here

   REPLACE POWER MANAGEMENT CONTROL ECU (for LHD)Click here

8. Click here

   REPAIR OR REPLACE HARNESS OR CONNECTOR

9. Click here

   REPLACE POWER MANAGEMENT CONTROL ECU (for RHD)Click here