P2601-777
P313 HYBRID VEHICLE CONTROL: HYBRID CONTROL SYSTEM: P2601-777: Oil Pump Control Circuit Range / Performance
P2601-777 - Oil Pump Control Circuit Range / Performance
DESCRIPTION
The hybrid vehicle control ECU detects the MG1 and MG2 temperatures based on signals from the generator and motor temperature sensors and activates the OIL PMP relay and oil pump driver (oil pump with motor assembly).
The hybrid vehicle control ECU monitors OPST signals from the oil pump driver and detects malfunctions.
The oil pump with motor assembly is activated when:
1. MG1 temperature is 176°F (80°C) or more.
2. MG2 temperature is 212°F (100°C) or more and MG1 temperature is 158°F (70°C) or more.
HINT
The oil pump with motor assembly cannot be activated only with the OIL PMP relay on. It is activated after receiving the command signals (OPM1) from the hybrid vehicle control ECU.
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT
When troubleshooting the oil pump with motor assembly, check for the following conditions.
* ATF temperature inside the oil cooler is 41°F (5°C) or more.
* The ambient temperature sensor value is 41°F (5°C) or more.
PROCEDURE
1. CHECK OPERATION OIL PUMP WITH MOTOR ASSEMBLY
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Enter inspection mode Component Tests and General Diagnostics.
HINT
Entering inspection mode activates the oil pump with motor assembly.
(d) Turn the ignition switch to ON (READY).
(e) Connect an oscilloscope between the hybrid vehicle control ECU terminals specified in the table below, and measure the waveform.
Result:
Text in Illustration
(f) Turn the ignition switch off.
D -- CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - OIL PUMP WITH MOTOR ASSEMBLY)
C -- CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - OIL PUMP WITH MOTOR ASSEMBLY)
B -- REPLACE HYBRID VEHICLE CONTROL ECU Removal
A -- REPLACE OIL PUMP WITH MOTOR ASSEMBLY Removal
2. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - OIL PUMP WITH MOTOR ASSEMBLY)
(a) Disconnect the A48 connector from the oil pump with motor assembly.
(b) Disconnect the A65 connector from the hybrid vehicle control ECU.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance (Check for Open):
Standard Resistance (Check for Short):
Text in Illustration
(d) Connect the hybrid vehicle control ECU connector.
(e) Connect the oil pump with motor assembly connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
3. INSPECT OIL PUMP WITH MOTOR ASSEMBLY
(a) Disconnect the A65 and D72 connectors from the hybrid vehicle control ECU.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
(c) Connect the hybrid vehicle control ECU connector.
NG -- REPLACE OIL PUMP WITH MOTOR ASSEMBLY Removal
OK -- REPLACE HYBRID VEHICLE CONTROL ECU Removal
4. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - OIL PUMP WITH MOTOR ASSEMBLY)
(a) Disconnect the A48 connector from the oil pump with motor assembly.
(b) Disconnect the A65 connector from the hybrid vehicle control ECU.
(c) Turn the ignition switch to ON.
(d) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Text in Illustration
NOTICE:
Turning the ignition switch to ON with the hybrid vehicle control ECU connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.
(e) Turn the ignition switch off.
(f) Connect the hybrid vehicle control ECU connector.
(g) Connect the oil pump with motor assembly connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
5. INSPECT OIL PUMP WITH MOTOR ASSEMBLY
(a) Disconnect the A48 connector from the oil pump with motor assembly.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
(c) Connect the oil pump with motor assembly connector.
NG -- REPLACE OIL PUMP WITH MOTOR ASSEMBLY Removal
OK -- REPLACE HYBRID VEHICLE CONTROL ECU Removal