P2601-777

HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM: P2601-777: Oil Pump Control Circuit Range / Performance
P2601-777 - Oil Pump Control Circuit Range / Performance

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 176°F (80°C) or more

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

HINT
The oil pump with motor assembly cannot be activated only with the OIL PMP relay on. It is activated after receiving the command signals (OPM1) from the power management control ECU.

WIRING DIAGRAM





INSPECTION PROCEDURE

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

- ATF temperature inside the oil cooler is 41°F (5°C) or more.
- The ambient temperature sensor value is 41°F (5°C) or more.

PROCEDURE

1. CHECK OPERATION OIL PUMP WITH MOTOR ASSEMBLY

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Enter inspection mode Component Tests and General Diagnostics.

HINT
Entering inspection mode activates the oil pump with motor assembly.

(d) Turn the power switch on (READY).

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









Result:





Text in Illustration





(f) Turn the power switch off.

B -- REPLACE POWER MANAGEMENT CONTROL ECU Components

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

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

A -- REPLACE OIL PUMP WITH MOTOR ASSEMBLY Components

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

(a) Disconnect the A75 connector from the oil pump with motor assembly.

(b) Disconnect the A80 connector from the power management control ECU.

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





Standard Resistance (Check for Open):





Standard Resistance (Check for Short):





Text in Illustration





(d) Connect the power management control ECU connector.

(e) Connect the oil pump with motor assembly connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

3. INSPECT OIL PUMP WITH MOTOR ASSEMBLY

(a) Disconnect the A80 and F97 connectors from the power management control ECU.

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





Standard Resistance:





Text in Illustration





(c) Connect the power management control ECU connector.

NG -- REPLACE OIL PUMP WITH MOTOR ASSEMBLY Components

OK -- REPLACE POWER MANAGEMENT CONTROL ECU Components

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

(a) Disconnect the A75 connector from the oil pump with motor assembly.

(b) Disconnect the A80 connector from the power management control ECU.

(c) Turn the power switch on (IG).

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





Standard Voltage:





Text in Illustration





NOTICE:
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.

(e) Turn the power switch off.

(f) Connect the power management control ECU connector.

(g) Connect the oil pump with motor assembly connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

5. INSPECT OIL PUMP WITH MOTOR ASSEMBLY

(a) Disconnect the A75 connector from the oil pump with motor assembly.

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





Standard Resistance:





Text in Illustration





(c) Connect the oil pump with motor assembly connector.

NG -- REPLACE OIL PUMP WITH MOTOR ASSEMBLY Components

OK -- REPLACE POWER MANAGEMENT CONTROL ECU Components