P2797-865

L110F HYBRID VEHICLE CONTROL: HYBRID CONTROL SYSTEM: P2797-865: Auxiliary Transmission Fluid Pump Control Performance

DTC P2797-865 - 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 operation of the auxiliary transmission fluid pump. If the hybrid vehicle control ECU detects a malfunction of 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

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. CHECK DTC OUTPUT (HV)
(a) Connect the intelligent tester or Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Select the following menu items:
(1) Intelligent tester - Select: DIAGNOSIS / OBD/MOBD / HV ECU / DTC INFO / CURRENT CODES.
(2) Techstream - Select: Powertrain / Hybrid Control / Trouble Codes.
(d) Check if DTCs are output.
Result:

B -- GO TO DTC CHART
A -- Continue to next step.
2. CHECK FREEZE FRAME DATA (AUXILIARY BATTERY VOLTAGE)
(a) Select the following menu items:
(1) Intelligent tester - Select: DIAGNOSIS / OBD/MOBD / HV ECU / DTC INFO / CURRENT CODES.
(2) Techstream - Select: Powertrain / Hybrid Control / Trouble Codes.
(b) Read the freeze frame data (auxiliary battery voltage (+B)) of DTC P2797-865.
OK:
+B is 10 V or more.
NG -- CHECK AUXILIARY BATTERY
OK -- Continue to next step.
3. CLEAR DTC
(a) Select the following menu items:
(1) Intelligent tester - Select: DIAGNOSIS / OBD/MOBD / HV ECU / DTC INFO / CURRENT CODES.
(2) Techstream - Select: Powertrain / Hybrid Control / Trouble Codes.
(b) Read and record the DTCs and freeze frame data.
(c) Select the following menu items:
(1) Intelligent tester - Select: DIAGNOSIS / OBD/MOBD / HV ECU / DTC INFO / CLEAR CODES.
(2) Techstream - Select: Powertrain / Hybrid Control / Trouble Codes.
(d) Clear DTCs and freeze frame data.
NEXT -- Continue to next step.
4. CHECK DTC OUTPUT (HV)
(a) Check if the DTC is output several seconds (approximately 3 seconds) after the power switch is turned on (IG) or the ST-on state occurs.
HINT: ST-on is a state that occurs when the READY indicator in the combination meter blinks after the power switch is pressed with the brake pedal depressed.

Result:

C -- CHECK FOR INTERMITTENT PROBLEMS
B -- CHECK CONNECTOR CONNECTION CONDITION (OIL PUMP MOTOR CONTROLLER CONNECTOR)
A -- Continue to next step.
5. CHECK HYBRID VEHICLE CONTROL ECU (CHECK WAVEFORM)

(a) Connect an oscilloscope between the hybrid vehicle control ECU terminals specified in the table below, and measure the waveform.

Result:

C -- CHECK NOISE CONDITIONS
B -- CHECK CONNECTOR CONNECTION CONDITION (OIL PUMP MOTOR CONTROLLER)
A -- Continue to next step.
6. 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:

NOTE: 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.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
7. CHECK HYBRID VEHICLE CONTROL ECU (CHECK +B SHORT)
(a) Turn the power switch off.
(b) Connect connector A74 to the hybrid vehicle control ECU.
(c) Turn the power switch on (IG).

(d) Measure the voltage according to the value(s) in the table below.
Standard voltage:

(a) Turn the power switch on (IG).
(b) Measure the frequency according to the value(s) in the table below.
Standard frequency:

NOTE: 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.
HINT: Perform this inspection with the hybrid vehicle control ECU connectors connected.

NG -- REPLACE HYBRID VEHICLE CONTROL ECU
OK -- REPLACE OIL PUMP MOTOR CONTROLLER
9. CHECK CONNECTOR CONNECTION CONDITION (OIL PUMP MOTOR CONTROLLER)
NOTE: Before disconnecting the connectors, confirm that they are properly connected by checking that the locking claws are engaged and that the connectors do not pull 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.
10. 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.
11. 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) 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.
12. CHECK HYBRID VEHICLE CONTROL ECU (CHECK GND SHORT)
(a) Connect connector A74 to the hybrid vehicle control ECU.

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

NG -- REPLACE HYBRID VEHICLE CONTROL ECU
OK -- Continue to next step.
13. CHECK HYBRID VEHICLE CONTROL ECU

(a) Turn the power switch on (IG).
(b) Measure the frequency according to the value(s) in the table below. (Hz)
Standard resistance:

NOTE: 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.
HINT: Perform this inspection with the hybrid vehicle control ECU connectors connected.

NG -- REPLACE HYBRID VEHICLE CONTROL ECU
OK -- REPLACE OIL PUMP MOTOR CONTROLLER
14. CHECK CONNECTOR CONNECTION CONDITION (OIL PUMP MOTOR CONTROLLER CONNECTOR)
NOTE: Before disconnecting the connectors, confirm that they are properly connected by checking that the locking claws are engaged and that the connectors do not pull 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.
15. CHECK HARNESS AND CONNECTOR (OIL PUMP MOTOR CONTROLLER - OIL PUMP MOTOR)

(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:

NOTE: Turning the power switch on (IG) with the oil pump motor controller connectors 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 (Check for open):

Standard resistance (Check for short):

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
16. CHECK IF PART IS CORRECTLY GROUNDED
(a) Measure the resistance according to the value(s) in the table below.
Standard resistance :

NG -- REPAIR OR REPLACE OIL PUMP MOTOR CONTROLLER
OK -- REPLACE OIL PUMP MOTOR CONTROLLER
17. CHECK NOISE CONDITIONS
(a) Check the waveform for an interruption or distortion.
Result:

B -- CLEAR NOISE CONDITIONS
A -- REPLACE OIL PUMP MOTOR CONTROLLER