Part 1
L110F HYBRID VEHICLE CONTROL: HYBRID CONTROL SYSTEM: P0867-876,P0867-878,P0867-882,P0989-899: Transmission Fluid Pressure
P0989-899 - Transmission Fluid Pressure Sensor / Switch "E" Circuit Low
DESCRIPTION
For a description of the hybrid vehicle transmission assembly, P0731.
HINT
The ST-on state 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.
MONITOR DESCRIPTION
The hybrid vehicle control ECU monitors the hydraulic control system. If the line pressure circuit is malfunctioning, 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
HINT
For a wiring diagram of the oil pump motor circuit, P2797 and P2797.
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 (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.
3. CHECK CONNECTOR CONNECTION CONDITION (TRANSMISSION WIRE CONNECTOR)
(a) Check the connection of the transmission wire connector.
OK:
The connector is connected securely and there are no contact problems.
NG -- CONNECT SECURELY
OK -- Continue to next step.
4. 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.
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 HYBRID VEHICLE TRANSMISSION ASSEMBLY (SP SOLENOID VALVE, PB3 OIL PRESSURE SWITCH)
(a) Disconnect connector E55 from the hybrid vehicle control ECU.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance (Check for open):
Standard resistance (Check for short):
Result:
C -- CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - TRANSMISSION WIRE)
B -- CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - TRANSMISSION WIRE)
A -- Continue to next step.
7. 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 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):
Standard resistance (Check for short):
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
8. 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.
9. CHECK OIL WITH MOTOR PUMP ASSEMBLY
(a) Disconnect the 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 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 -- REPLACE OIL WITH MOTOR PUMP ASSEMBLY Components
OK -- Continue to next step.
10. CHECK OIL PUMP MOTOR CONTROLLER (POWER SOURCE CIRCUIT)
(a) Turn the power switch off.
(b) Disconnect connector A78 from the oil pump motor controller.
(c) Install the OIL PMP relay to the engine room No. 5 relay block.
(d) Turn the power switch on (IG).
(e) Measure the voltage according to the value(s) in the table below.
Standard voltage:
(f) Turn the power switch off.
(g) Remove the OIL PMP relay from the engine room No. 5 relay block.
(h) Measure the resistance according to the value(s) in the table below.
Standard resistance (Check for open):
Standard resistance (Check for short):
(i) Disconnect connector A74 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.
11. READ VALUE USING TECHSTREAM (LINE PRESSURE)
(a) Connect connector A74 to the hybrid vehicle control ECU.
(b) Disconnect the transmission wire connector.
(c) Turn the power switch on (IG).
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.
(d) Select the following menu items: Powertrain / Hybrid Control / Data List / Line Pressure.
(e) Read the data list.
OK:
NG -- CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - TRANSMISSION WIRE)
OK -- Continue to next step.
12. CLEAR DTC
(a) Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
(b) Read and record the DTCs and freeze frame data.
(c) Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
(d) Clear DTCs and freeze frame data.
NEXT -- Continue to next step.
13. READ VALUE USING TECHSTREAM (LINE PRESSURE SOLENOID, B2 OIL PRESSURE, LINE PRESSURE)
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Select the following menu items: Powertrain / Hybrid Control / Data List / Line Pressure Solenoid, B2 Oil Pressure, Line Pressure.
(d) Check the data list items for approximately 8 seconds after pressing the power switch with the brake pedal depressed.
Result:
C -- REPLACE HYBRID VEHICLE TRANSMISSION ASSEMBLY Components
B -- CHECK CONNECTOR CONNECTION CONDITION (PB3 OIL PRESSURE SWITCH)
A -- Continue to next step.
14. SIMULATION TEST (OIL PUMP MOTOR)
(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) Select the following menu items: All Data / OPM Target Revolution, OPM Revolution.
(d) Perform the "Activate the Oil Pump (500rpm)" and "Activate the Oil Pump (1000rpm)" active tests.
OK:
"OPM Target Revolution" and "OPM Revolution" values are almost equal.
NOTICE:
Make sure that the auxiliary battery is not discharged.
NG -- REPLACE OIL WITH MOTOR PUMP ASSEMBLY Components
OK -- Continue to next step.