P2797
L110F HYBRID VEHICLE CONTROL: HYBRID CONTROL SYSTEM: P2797-881: Auxiliary Transmission Fluid Pump Control Performance
P2797-881 - Auxiliary Transmission Fluid Pump Control Performance
DESCRIPTION
For a description of the oil pump motor, P0C29.
MONITOR DESCRIPTION
The hybrid vehicle control ECU monitors the operation of the auxiliary transmission fluid pump. If the hybrid vehicle control ECU detects a malfunction in the auxiliary transmission fluid pump control circuit, the hybrid vehicle control ECU will illuminate the MIL and set a DTC.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
TYPICAL MALFUNCTION THRESHOLDS
COMPONENT OPERATING RANGE
CONFIRMATION DRIVING PATTERN
1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG) and turn the Techstream on.
3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
4. Turn the power switch off.
5. Turn the power switch on (READY) and turn the Techstream on.
6. Perform the universal trip 3 times.
NOTICE:
After performing each universal trip, stop the vehicle in EV mode for 1 minute.
7. Enter the following menus: Powertrain / HV / Trouble Codes.
8. Check that the permanent DTCs are cleared.
HINT
- If a permanent DTC is output, the system is malfunctioning.
- If no permanent DTC is output, the system is normal.
INSPECTION PROCEDURE
PROCEDURE
1. CHECK DTC OUTPUT (HV)
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
(d) Check if DTCs are output.
Result:
B -- GO TO DTC CHART Hybrid Control System
A -- Continue to next step.
2. CHECK CONNECTOR CONNECTION CONDITION (OIL PUMP MOTOR CONTROLLER CONNECTOR)
NOTICE:
Before disconnecting the connectors, confirm that they are properly connected by checking that the locking claws are engaged and that the connectors cannot be pulled out.
(a) Check the connections of the oil pump motor controller connectors.
OK:
The connectors are connected securely and there are no contact problems.
HINT
For connector A, when connecting it, insert it with the locking lever in the raised position. Rotate the lever downward and make sure that the connector is pulled into its socket. When the locking lever is in its fully closed position, a click will be heard as its locking claws engage. After the click is heard, pull up on the connector to confirm that it is properly connected.
NG -- CONNECT SECURELY
OK -- Continue to next step.
3. CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR)
(a) Check the connections of the hybrid vehicle control ECU connectors.
OK:
The connectors are connected securely and there are no contact problems.
NG -- CONNECT SECURELY
OK -- Continue to next step.
4. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - OIL PUMP MOTOR CONTROLLER)
(a) Turn the power switch off.
(b) Disconnect connector A74 from the hybrid vehicle control ECU.
(c) Disconnect connector A78 from the oil pump motor controller.
(d) Turn the power switch on (IG).
(e) Measure the voltage according to the value(s) in the table below.
Standard voltage:
NOTICE:
Turning the power switch on (IG) with the hybrid vehicle control ECU and oil pump motor controller connectors disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.
(f) Turn the power switch off.
(g) Measure the resistance according to the value(s) in the table below.
Standard resistance (Check for open):
Standard resistance (Check for short):
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
5. CHECK FUSIBLE LINK BLOCK ASSEMBLY (OIL PMP)
(a) Check if there is an open circuit in the fusible link (OIL PMP) in the engine room No. 1 junction block.
OK:
There is no open circuit in the fusible link (OIL PMP).
NG -- REPLACE FUSIBLE LINK BLOCK ASSEMBLY
OK -- Continue to next step.
6. CHECK RELAY (OIL PMP)
(a) Remove the OIL PMP relay from the engine room No. 5 relay block.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
NG -- REPLACE RELAY (OIL PMP) Components
OK -- Continue to next step.
7. CHECK OIL WITH MOTOR PUMP ASSEMBLY P0867-876
NG -- REPLACE OIL WITH MOTOR PUMP ASSEMBLY Components
OK -- Continue to next step.
8. CHECK OIL PUMP MOTOR CONTROLLER (VOLTAGE)
(a) Install the OIL PMP relay to the engine room No. 5 relay block.
(b) Disconnect connector A78 from the oil pump motor controller.
(c) Turn the power switch on (IG).
(d) Measure the voltage according to the value(s) in the table below.
Standard voltage:
(e) Turn the power switch off.
(f) Remove the OIL PMP relay from the engine room No. 5 relay block.
(g) Measure the resistance according to the value(s) in the table below.
Standard resistance (Check for open):
Standard resistance (Check for short):
(h) Disconnect connector A74 from the hybrid vehicle control ECU.
(i) Measure the resistance according to the value(s) in the table below.
Standard resistance (Check for open):
Standard resistance (Check for short):
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
9. CLEAR DTC
(a) Turn the power switch on (IG).
(b) Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
(c) Read and record the DTCs and freeze frame data.
(d) Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
(e) Clear DTCs and freeze frame data.
NEXT -- Continue to next step.
10. SIMULATION TEST
(a) Select the following menu items: Powertrain / Hybrid Control / Active Test / Activate the Oil Pump (500rpm), Activate the Oil Pump (1000rpm).
(b) Select the following menu items: All Data / OPM Revolution.
(c) Perform the "Activate the Oil Pump (500rpm)" and "Activate the Oil Pump (1000rpm)" Active Tests.
NOTICE:
Make sure that the auxiliary battery is not discharged.
OK:
For both the "Activate the Oil Pump (500rpm)" and "Activate the Oil Pump (1000rpm)" Active Tests, the value of "OPM Revolution" is almost the same as the corresponding Active Test speed.
NG -- REPLACE OIL WITH MOTOR PUMP ASSEMBLY Components
OK -- Continue to next step.
11. CHECK FOR INTERMITTENT PROBLEMS
(a) Check for intermittent problems Check for Intermittent Problems.
NG -- REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA
OK -- Continue to next step.
12. CHECK FOR FLUID LEAKS
(a) Check for fluid leaks from the hybrid vehicle transmission assembly.
OK:
There are no fluid leaks.
NG -- REPAIR OR REPLACE HYBRID VEHICLE TRANSMISSION ASSEMBLY Components
OK -- REPLACE HYBRID VEHICLE CONTROL ECU Service and Repair