P2797-881

L110 HYBRID VEHICLE CONTROL: HYBRID CONTROL SYSTEM: P2797-881: Auxiliary Transmission Fluid Pump Control Performance

DTC P2797-881 - Auxiliary Transmission Fluid Pump Control Performance

DESCRIPTION
The oil pump motor controller controls the rotation speed of the oil pump motor (three-phase brushless motor) in accordance with rotation speed request signals sent from the hybrid vehicle control ECU. The controller also outputs the oil pump motor status as a signal to the hybrid vehicle control ECU.









MONITOR DESCRIPTION

The hybrid vehicle control ECU monitors the proper 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





INSPECTION PROCEDURE
CAUTION:
- Before inspecting the high-voltage system or disconnecting the low voltage connector of the inverter with converter assembly, take safety precautions such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.
- After disconnecting the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. After waiting, check the voltage at the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work.
HINT: Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

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:






YES -- GO TO DTC CHART
NO -- Continue to next step.
2. CHECK CONNECTOR CONNECTION CONDITION (OIL PUMP MOTOR CONTROLLER CONNECTOR)
(a) Turn the power switch off.




(b) Check the connections of the oil pump motor controller connectors.
Result:
The connectors are connected securely and there are no contact problems.
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.
Result:
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 A54 from the hybrid vehicle control ECU.
(c) Disconnect connector A55 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 connector 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):





(h) Measure the resistance according to the value(s) in the table below.
Standard resistance (Check for short):






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
5. CHECK FUSIBLE LINK (OIL PMP)




(a) Check that there is no open circuit in the fusible link (OIL PMP) in the engine room R/B No. 1.
OK:
There is no open circuit in the fusible link.
NG -- REPLACE FUSIBLE LINK
OK -- Continue to next step.
6. CHECK RELAY (OIL PMP)




(a) Remove the OIL PMP relay from the engine room R/B No. 1.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- REPLACE RELAY (OIL PUMP)
OK -- Continue to next step.
7. CHECK OIL WITH MOTOR PUMP ASSEMBLY




(a) Disconnect connectors from the oil pump motor controller.
(b) Turn the power switch on (IG).
(c) Measure the voltage according to the value(s) in the table below.
Standard voltage:





NOTICE:
Turning the power switch on (IG) with the oil pump motor controller connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.
(d) Turn the power switch off.
(e) Measure the resistance according to the value(s) in the table below.
Standard resistance:





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






NG -- REPLACE OIL WITH MOTOR PUMP ASSEMBLY
OK -- Continue to next step.
8. CHECK OIL PUMP MOTOR CONTROLLER




(a) Turn the power switch off.
(b) Disconnect connector A55 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:





NOTICE:
Turning the power switch on (IG) with the oil pump motor controller disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.




(e) Turn the power switch off.
(f) Remove the OIL PMP relay from the engine room R/B No. 1.
(g) Measure the resistance according to the value(s) in the table below.
Standard resistance:





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









(i) Disconnect connector A54 from the hybrid vehicle control ECU.
(j) Turn the power switch off.
(k) 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) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Read and record the DTCs and freeze frame data.
(d) Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
(e) Clear the DTCs.
NEXT -- Continue to next step.
10. SIMULATION TEST
(a) Turn the power switch on (IG).
(b) Select the following menu items: Powertrain / Hybrid Control / Active Test / Activate the Oil Pump (500rpm), Activate the Oil Pump (1000rpm).
(c) Perform the "Activate the Oil Pump (500rpm)" and "Activate the Oil Pump (1000rpm)" active tests.
(d) During the "Activate the Oil Pump (500rpm)" and "Activate the Oil Pump (1000rpm)" active tests, select the following menu items: User Data / OPM Target Revolution, OPM Revolution.
NOTICE:
Make sure that the auxiliary battery is not discharged.
(e) Read the data list.
Result:
OPM Target Revolution and OPM Revolution values are almost equal.
Result:






NG -- REPLACE OIL WITH MOTOR PUMP ASSEMBLY
OK -- Continue to next step.
11. CHECK FOR INTERMITTENT PROBLEMS
(a) Check for intermittent problems. L110 Hybrid Vehicle Control System
NG -- REPAIR MALFUNCTIONING PARTS, COMPONENT AND AREA
OK -- Continue to next step.
12. CHECK FOR FLUID LEAK
(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
OK -- REPLACE HYBRID VEHICLE CONTROL ECU