Inspection Procedure

NOTE:

When troubleshooting the oil pump w/ motor assembly, check for the following conditions.
- ATF temperature inside the oil cooler is 5°C (41°F) or more.
- Value of the ambient temperature sensor is 5°C (41°F) or more.

INSPECT OIL PUMP FUSE
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.
NG: REPLACE OIL PUMP FUSE

Fig 1: Identifying Oil Pump Fuse In Engine Room R/B No 4
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to next step

INSPECT OIL PUMP RELAY

Remove the oil pump relay from the engine room R/B No.4.

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

Standard Resistance

TESTER CONNECTION AND SPECIFIED CONDITION

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

NG: REPLACE OIL PUMP RELAY

Fig 2: Inspecting Oil Pump Relay

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to next step

CHECK HARNESS AND CONNECTOR (HV CONTROL ECU - OIL PUMP RELAY, OIL PUMP RELAY - OIL PUMP)

Remove the oil pump relay from the engine room R/B No.4.
Disconnect the O9 oil pump w/ motor assembly connector.
Disconnect the H34 HV control ECU connector.

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

Standard Resistance (Check for open)

TESTER CONNECTION AND SPECIFIED CONDITION

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)

TESTER CONNECTION AND SPECIFIED CONDITION

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

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

Standard Resistance (Check for open)

TESTER CONNECTION AND SPECIFIED CONDITION

Tester Connection	Specified Condition
Engine room R/B No.4 OIL PUMP relay terminal 3 - L (O9-4)	Below 1 Ω

Standard Resistance (Check for short)

TESTER CONNECTION AND SPECIFIED CONDITION

Tester Connection	Specified Condition
Engine room R/B No.4 OIL PUMP relay terminal 3 or L (O9-4) - Body ground	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

Fig 3: Identifying Oil Pump Relay

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to next step

CHECK HARNESS AND CONNECTOR (HV CONTROL ECU - OIL PUMP)

Disconnect the O9 oil pump w/ motor assembly connector.
Disconnect the H34 HV control ECU connector.

Measure the voltage according to the value(s) in the table below when the ignition switch is in the ON position.

Standard Voltage

TESTER CONNECTION AND SPECIFIED CONDITION

Tester Connection	Specified Value
OPST (H34-7) or OPST (09-2) - Body ground	Below 1 V

Turn the ignition switch off.

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

Standard Resistance

TESTER CONNECTION AND SPECIFIED CONDITION

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

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

Fig 4: Disconnecting H34 HV Control ECU Connector

OK: Go to next step

INSPECT HYBRID VEHICLE CONTROL ECU

Remove the oil pump relay from the engine room R/B No.4.
Connect the intelligent tester to the DLC3.
Turn the ignition switch to the ON position.
Select the following menu items: DIAGNOSIS / OBD/ MOBD / HV ECU / ACTIVE TEST / INSPECTION MODE 1.
Put the vehicle into the READY-on state.

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

Standard Voltage

TESTER CONNECTION AND SPECIFIED CONDITION

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

Turn the ignition switch off.

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

Standard Resistance

TESTER CONNECTION AND SPECIFIED CONDITION

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

NG: REPLACE HYBRID VEHICLE CONTROL ECU

Fig 5: Identifying Oil Pump Relay In Engine Room R/B No.4

OK: REPLACE OIL PUMP W/ MOTOR ASSEMBLY