Inspection Procedure

1. Remove the oil pump fuse from the engine room R/B No. 4.
2. Check continuity of the oil pump fuse.

   OK: 

   There is continuity. 

Fig 1: Inspecting Oil Pump Fuse

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE OIL PUMP FUSE 

OK: GO TO NEXT STEP 

1. Remove the oil pump relay from the engine room R/B No. 4.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance 

   OIL PUMP RELAY
   
   

   Tester Connection	Specified Condition
   1 - 2	Below 1 Ω
   3 - 5	10 kΩ or higher
   	Below 1 Ω (Apply battery voltage between terminals 1 and 2)

   Fig 2: Inspecting Oil Pump Relay

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE OIL PUMP RELAY 

OK: GO TO NEXT STEP 

1. Remove the oil pump relay from the engine room R/B No. 4.
2. Disconnect the O9 oil pump w/ motor assembly connector.
3. Disconnect the H34 HV control ECU connector.
4. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for open) 

   HV CONTROL ECU - OIL PUMP RELAY (CHECK FOR OPEN)
   
   

   Tester Connection	Specified Condition
   OPM2 (H34-5) - Engine room R/B No. 4 OIL PUMP relay terminal 1	Below 1 Ω

   Standard Resistance (Check for short) 

   HV CONTROL ECU - OIL PUMP RELAY (CHECK FOR SHORT)
   
   

   Tester Connection	Specified Condition
   OPM2 (H34-5) or Engine room R/B No. 4 OIL PUMP relay terminal 1 - Body ground	10 kΩ or higher

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

   Standard Resistance (Check for open) 

   OIL PUMP RELAY - OIL PUMP (CHECK FOR OPEN)
   
   

   Tester Connection	Specified Condition
   Engine room R/B No. 4 OIL PUMP relay terminal 2 - +B (O9-1)	Below 1 Ω

   Standard Resistance (Check for short) 

   OIL PUMP RELAY - OIL PUMP (CHECK FOR SHORT)
   
   

   Tester Connection	Specified Condition
   Engine room R/B No. 4 OIL PUMP relay terminal 2 or +B (O9-1) - Body ground	10 kΩ or higher

   Fig 3: Checking Harness And Connector (HV Control ECU - Oil Pump Relay, Oil Pump Relay - Oil Pump)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: GO TO NEXT STEP 

1. Disconnect the O9 oil pump w/ motor assembly connector.
2. Disconnect the H34 HV control ECU connector.
3. Measure the voltage according to the value(s) in the table below when the ignition switch is in the ON position.

   Standard Voltage 

   HV CONTROL ECU - OIL PUMP (VOLTAGE)
   
   

   Tester Connection	Specified Value
   OPST (H34-7) or STAT (O9-2) - Body ground	Below 1 V

4. Turn the ignition switch off.
5. Measure the resistance according to the value(s) in the table below.

   Standard Resistance 

   HV CONTROL ECU - OIL PUMP (RESISTANCE)
   
   

   Tester Connection	Specified Condition
   OPST (H34-7) - STAT (O9-2)	Below 1 Ω

   Fig 4: Checking Harness And Connector (HV Control ECU - Oil Pump)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: GO TO NEXT STEP 

1. Remove the oil pump relay from the engine room R/B No. 4.
2. Connect the intelligent tester to the DLC3.
3. Turn the ignition switch to the ON position.
4. Select the following menu items: DIAGNOSIS / OBD/ MOBD / HV ECU / ACTIVE TEST / INSPECTION MODE 1.
5. Put the vehicle into the READY-on state.
6. Measure the voltage according to the value(s) in the table below.

   Standard Voltage 

   HYBRID VEHICLE CONTROL ECU (VOLTAGE)
   
   

   Tester Connection	Specified Value
   OPM2 (H34-5) - E1 (H31-5)	10 to 14 V

7. Turn the ignition switch off.
8. Measure the resistance according to the value(s) in the table below.

   Standard Resistance 

   HYBRID VEHICLE CONTROL ECU (RESISTANCE)
   
   

   Tester Connection	Specified Condition
   OPST (H34-7) - +B1 (H34-2)	10 kΩ or higher

   Fig 5: Inspecting Hybrid Vehicle Control ECU

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE HYBRID VEHICLE CONTROL ECU 

OK: REPLACE OIL PUMP W/ MOTOR ASSEMBLY