P2601-779: Oil Pump Control Circuit Range / Performance

HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM: P2601-779: Oil Pump Control Circuit Range / Performance
P2601-779 - Oil Pump Control Circuit Range / Performance

DESCRIPTION

The hybrid vehicle control ECU 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 hybrid vehicle control ECU 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 hybrid vehicle 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 DTC OUTPUT (HV)

(a) Connect the Techstream to the DLC3.

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

(c) Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

(d) Check if DTCs are output.

Result:





(e) Turn the power switch off.

B -- GO TO DTC CHART (P0A08-264) P0A08
A -- Continue to next step.

2. CHECK FUSE (OIL PMP)

(a) Remove the OIL PMP fuse from the engine room junction block assembly.

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





Standard resistance:





Text in Illustration





(c) Install the OIL PMP fuse.

NG -- REPLACE FUSE (OIL PMP)
OK -- Continue to next step.

3. INSPECT RELAY (OIL PMP)

(a) Remove the OIL PMP relay from the engine room junction block assembly.

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





Standard Resistance:





(c) Install the OIL PMP relay.

NG -- REPLACE RELAY (OIL PMP)
OK -- Continue to next step.

4. CHECK HARNESS AND CONNECTOR (AUXILIARY BATTERY - OIL PUMP - BODY GROUND)

(a) Disconnect the cable from the negative auxiliary battery terminal.

(b) Disconnect the cable from the positive auxiliary battery terminal.

(c) Remove the OIL PMP relay from the engine room junction block assembly.

(d) Disconnect the A15 connector from the oil pump with motor assembly.

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





Standard Resistance:





Text in Illustration





OK:

Combined resistance (R1, R2 and R3) of each part in the wire harness is below 6 Ohms.

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

(g) Install the OIL PMP relay.

(h) Connect the cable to the positive auxiliary battery terminal.

(i) Connect the cable to the negative auxiliary battery terminal.

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

5. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - OIL PUMP WITH MOTOR ASSEMBLY)

(a) Remove the OIL PMP relay from the engine room junction block assembly.

(b) Disconnect connector A58 from the hybrid vehicle control ECU.

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





Standard Resistance:





Text in Illustration





(d) Connect the hybrid vehicle control ECU connector.

(e) Install the OIL PMP relay.

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

6. REPLACE OIL PUMP WITH MOTOR ASSEMBLY

(a) Replace the oil pump with motor assembly Components.

NEXT -- Continue to next step.

7. CLEAR DTC P0A09

NEXT -- Continue to next step.

8. CHECK DTC OUTPUT (HV)

(a) Connect the Techstream to the DLC3.

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

(c) Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

(d) Check if DTCs are output.

Result:





(e) Turn the power switch off.

B -- REPLACE HYBRID VEHICLE CONTROL ECU Components
A -- Continue to next step.

9. CHECK INTERMITTENT PROBLEMS

(a) Check for intermittent problems Check For Intermittent Problems.

NG -- REPAIR OR REPLACE MALFUNCTIONING PARTS

OK -- COMPLETED