P2602

P310 HYBRID VEHICLE CONTROL: HYBRID CONTROL SYSTEM: P2602-767: Coolant Pump Control Circuit Low

DTC P2602-767 - Coolant Pump Control Circuit Low

DESCRIPTION
HINT: This is the repair procedure for the "oil pump control circuit".

The HV control ECU detects the Generator and Motor temperature through signals from the generator and motor temperature sensors and activates the oil pump relay and oil pump driver (oil pump w/ motor assembly).
The HV control ECU monitors OPST signals from the oil pump driver and detects a malfunction.






WIRING DIAGRAM





INSPECTION PROCEDURE
NOTICE:
- When troubleshooting the oil pump w/ motor assembly, check for the following conditions:

- ATF temperature inside the oil cooler is 41 °F (5°C) or more.
- Value of the ambient temperature sensor is 41 °F (5°C) or more.

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (HV CONTROL ECU - OIL PUMP W/ MOTOR ASSEMBLY)
(a) Disconnect the H34 HV control ECU connector.





(b) Disconnect the oil pump w/ motor assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
2. INSPECT OIL PUMP W/ MOTOR ASSEMBLY
(a) Disconnect the O9 oil pump w/ motor assembly connector.





(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:






NG -- REPLACE OIL PUMP W/ MOTOR ASSEMBLY
OK -- REPLACE HYBRID VEHICLE CONTROL ECU