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

1. Check the connections of the oil pump with motor assembly connector.

   OK

   The connector is connected securely and there are no contact problems.

NG → CONNECT SECURELY 

OK → See step   2 

NG → CONNECT SECURELY 

OK: Go to next step 

1. Disconnect connector from the oil pump with motor assembly.
2. Disconnect connector A58 from the hybrid vehicle control ECU.
3. Measure the resistance according to the value(s) in the table below.
   Fig 1: Identifying A58 From The Hybrid Vehicle Control ECU & A15 Oil Pump With Motor Assembly

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance (Check for Open)

   Tester Connection	Switch Condition	Specified Condition
   A58-47 (OPM1) - A15-3 (OPM)	Power switch off	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Switch Condition	Specified Condition
   A58-47 (OPM1) or A15-3 (OPM) - Body ground and other terminals	Power switch off	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *1	Front view of wire harness connector (to Hybrid Vehicle Control ECU)
   *2	Front view of wire harness connector (to Oil Pump with Motor Assembly)

4. Turn the power switch on (IG).
5. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   A58-47 (OPM1) or A15-3 (OPM) - Body ground	Power switch on (IG)	Below 1 V

   NOTE:

   Turning the power switch on (IG) with the hybrid vehicle control ECU connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

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

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect connector A58 from the hybrid vehicle control ECU.
2. Measure the resistance according to the value(s) in the table below.
   Fig 2: Identifying A58 From The Hybrid Vehicle Control ECU

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   A58-47 (OPM1) - Body ground	Power switch off	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *1	Front view of wire harness connector (to Hybrid Vehicle Control ECU)

3. Connect the hybrid vehicle control ECU connector.

NG → See step   6 

OK: Go to next step 

1. Disconnect connector from the oil pump with motor assembly.
2. Measure the resistance according to the value(s) in the table below.
   Fig 3: Identifying A15 Oil Pump With Motor Assembly

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   A15-3 (OPM) - A15-4 (L)	Power switch off	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *1	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