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.

CHECK OPERATION OIL PUMP W/MOTOR ASSEMBLY

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

Check the waveform between the terminals of the HV control ECU.

TESTER CONNECTION AND SPECIFIED CONDITION

Tester Connection	Specified Condition
OPM1 (H34-6) - E1 (H31-5)	The waveform appears as shown in the illustration.

Result

DTC RESULT DESCRIPTION

Waveform	Proceed to
Normal waveform	A
Waveform other than normal waveform	B
No waveform (0 V)	C
No waveform (I2 V)	D

B: REPLACE HV CONTROL ECU

C: GO TO step 2

D: GO TO step 4

Fig 1: Identifying HV Control ECU Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

A: REPLACE OIL PUMP W/MOTOR ASSEMBLY

CHECK HARNESS AND CONNECTOR (HV CONTROL ECU - OIL PUMP W/MOTOR ASSEMBLY)

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

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
OPM1 (H34-6) - OPM1 (09-3)	Below 1 Ω

Standard Resistance (Check for short)

TESTER CONNECTION AND SPECIFIED CONDITION

Tester Connection	Specified Condition
OPM1 (H34-6) or OPM1 (09-3) - Body ground	10 kΩ or higher

Reconnect the HV control ECU connector. NG

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

Fig 2: Disconnecting H17 Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to next step

INSPECT HV CONTROL ECU (OPM1 TERMINAL CONTINUITY CHECK)

Disconnect the H31 and H34 HV control ECU connectors.

Check the continuity between each terminal.

Standard Resistance

TESTER CONNECTION AND SPECIFIED CONDITION

Tester Connection	Specified Condition
OPM1 (H34-6) - E1 (H31-5)	10 kΩ or higher

NG: REPLACE HV CONTROL ECU

Fig 3: Disconnecting H31 And H34 HV Control ECU Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: REPLACE OIL PUMP W/MOTOR ASSEMBLY

CHECK HARNESS AND CONNECTOR (HV CONTROL ECU - OIL PUMP W/MOTOR ASSEMBLY)

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 Condition
OPM1 (H34-6) - Body ground	Below 1 V

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

Fig 4: Disconnecting H17 Connector

OK: Go to next step

INSPECT OIL PUMP W/MOTOR ASSEMBLY

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

Standard resistance

TESTER CONNECTION AND SPECIFIED CONDITION

Tester Connection	Specified Condition
L (O9-4) - OPM1 (O9-3)	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

Fig 5: Identifying 012 Oil Pump W/ Motor Assembly Connector

OK: REPLACE HV CONTROL ECU