DTC P2601-777: Oil Pump Control Circuit Range / Performance: Procedure

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 1: Checking Operation Oil Pump With Motor Assembly

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Item	Content
   Terminal	A65-33 (OPM1) - D72-6 (E1)
   Equipment Setting	10 V/DIV., 20 ms./DIV.
   Condition	Inspection mode Ignition switch ON (READY)

   Result

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

   TEXT IN ILLUSTRATION
   
   

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

6. Turn the ignition switch off.

B → See step   7 

C → See step   2 

D → See step   4 

A → See step   6 

1. Disconnect the A48 connector from the oil pump with motor assembly.
2. Disconnect the A65 connector from the hybrid vehicle control ECU.
3. Measure the resistance according to the value(s) in the table below.
   Fig 2: Checking Harness And Connector (Hybrid Vehicle Control ECU - Oil Pump With Motor Assembly)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance (Check for Open)

   Tester Connection	Switch Condition	Specified Condition
   A48-3 (OPM1) - A65-33 (OPM1)	Ignition switch off	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Switch Condition	Specified Condition
   A48-3 (OPM1) or A65-33 (OPM1) - Body ground and other terminals	Ignition switch off	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Oil Pump with Motor Assembly)
   *b	Rear view of wire harness connector (to Hybrid Vehicle Control ECU)

4. Connect the hybrid vehicle control ECU connector.
5. Connect the oil pump with motor assembly connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the A65 and D72 connectors from the hybrid vehicle control ECU.
2. Measure the resistance according to the value(s) in the table below.
   Fig 3: Checking Oil Pump With Motor Assembly

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   A65-33 (OPM1) - D72-6 (E1)	Ignition switch off	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *a	Rear view of wire harness connector (to Hybrid Vehicle Control ECU)

3. Connect the hybrid vehicle control ECU connector.

NG → See step   6 

OK → See step   7 

1. Disconnect the A48 connector from the oil pump with motor assembly.
2. Disconnect the A65 connector from the hybrid vehicle control ECU.
3. Turn the ignition switch to ON.
4. Measure the voltage according to the value(s) in the table below.
   Fig 4: Checking Harness And Connector (Hybrid Vehicle Control ECU - Oil Pump With Motor Assembly)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   A48-3 (OPM1) or A65-33 (OPM1) - Body ground	Ignition switch ON	Below 1 V

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Oil Pump with Motor Assembly)
   *b	Rear view of wire harness connector (to Hybrid Vehicle Control ECU)

   NOTE:

   Turning the ignition switch to ON with the hybrid vehicle control ECU connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

5. Turn the ignition switch off.
6. Connect the hybrid vehicle control ECU connector.
7. Connect the oil pump with motor assembly connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the A48 connector from the oil pump with motor assembly.
2. Measure the resistance according to the value(s) in the table below.
   Fig 5: Checking Oil Pump With Motor Assembly

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   A48-3 (OPM1) - A48-4 (L)	Ignition switch off	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

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

3. Connect the oil pump with motor assembly connector.

NG → See step   6 

OK → See step   7