DTC P2601-779: Oil Pump Control Circuit Range / Performance: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
4. Check if DTCs are output.

   Result

   Result	Proceed to
   P2601-779 only is output.	A
   P0A08-264 is also output.	B

5. Turn the ignition switch off.

B → See step   7 

A: Go to next step 

1. Remove the OIL PMP fuse from the engine room relay block No. 3.
2. Measure the resistance according to the value(s) in the table below.
   Fig 1: Identifying Oil PMP Fuse From The Engine Room Relay Block No. 3

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   OIL PMP fuse	Always	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *1	Engine Room Relay Block No. 3
   *2	OIL PMP Fuse

3. Install the OIL PMP fuse.

NG → REPLACE FUSE (OIL PMP) 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
4. Read and record the DTCs and freeze frame data.
5. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
6. Clear DTCs and freeze frame data.
7. Turn the ignition switch off.

NEXT: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
4. Check if DTCs are output.

   Result

   Result	Proceed to
   P0A08-264 is output.	A
   The DTC is not output.	B

5. Turn the ignition switch off.

B → See step   8 

A: Go to next step 

1. Disconnect the cable from the negative auxiliary battery terminal.
2. Disconnect the cable from the positive auxiliary battery terminal.
3. Remove the OIL PMP relay from the engine room relay block No. 3.
4. Disconnect the A48 connector from the oil pump with motor assembly.
5. Measure the resistance according to the value(s) in the table below.
   Fig 2: Checking Harness And Connector (Auxiliary Battery - Oil Pump - Body Ground)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition	Resistance
   Positive auxiliary battery terminal - OIL PMP relay terminal 3	Ignition switch off	Below 2 Ω	R1
   OIL PMP relay terminal 5 - A48-4 (L)	Ignition switch off	Below 2 Ω	R2
   A48-1 (OPG) - Body ground	Ignition switch off	Below 2 Ω	R3

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Oil Pump with Motor Assembly)
   *b	Component without OIL PMP relay connected (Engine Room Relay Block No. 3)

   OK

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

6. Connect the oil pump with motor assembly connector.
7. Install the OIL PMP relay.
8. Connect the cable to the positive auxiliary battery terminal.
9. Connect the cable to the negative auxiliary battery terminal.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Enter inspection mode. Refer to INSPECTION MODE PROCEDURE .

   HINT: 

   Entering inspection mode activates the oil pump with motor assembly.

4. Turn the ignition switch to ON (READY).
5. Connect an oscilloscope between the hybrid vehicle control ECU terminals specified in the table below, and measure the waveform.
   Fig 3: Checking Hybrid Vehicle Control ECU With Waveform Reference

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Item	Content
   Terminal	A65-34 (OPST) - D72-6 (E1)
   Equipment Setting	10 V/DIV., 20 ms./DIV.
   Condition	Inspection mode Ignition switch ON (READY)

   TEXT IN ILLUSTRATION
   
   

   *a	Component with harness connected (Hybrid Vehicle Control ECU)

   OK

   The waveform appears as shown in the illustration.

6. Turn the ignition switch off.

NG → See step   10 

OK → See step   9