P2601-779

P313 HYBRID VEHICLE CONTROL: HYBRID CONTROL SYSTEM: P2601-779: Oil Pump Control Circuit Range / Performance
P2601-779 - Oil Pump Control Circuit Range / Performance

DESCRIPTION

Refer to the description for DTC P2601-777 P2601-777.





WIRING DIAGRAM

Refer to the wiring diagram for DTC P2601-777 P2601-777.

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 ignition switch to ON.

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

(d) Check if DTCs are output.

Result:





(e) Turn the ignition switch off.

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

2. CHECK FUSE (OIL PMP)

(a) Remove the OIL PMP fuse from the engine room relay block No. 3.

(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. CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

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

(d) Read and record the DTCs and freeze frame data.

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

(f) Clear DTCs and freeze frame data.

(g) Turn the ignition switch off.

NEXT -- Continue to next step.

4. CHECK DTC OUTPUT (HV)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

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

(d) Check if DTCs are output.

Result:





(e) Turn the ignition switch off.

B -- CHECK FOR INTERMITTENT PROBLEMS Check for Intermittent Problems
A -- Continue to next step.

5. 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 relay block No. 3.

(d) Disconnect the A48 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.

6. CHECK HYBRID VEHICLE CONTROL ECU

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

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

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

(d) Turn the ignition switch to ON (READY).

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









Text in Illustration





OK:

The waveform appears as shown in the illustration.

(f) Turn the ignition switch off.

NG -- REPLACE HYBRID VEHICLE CONTROL ECU Removal

OK -- REPLACE OIL PUMP WITH MOTOR ASSEMBLY Removal