P0989
L110 HYBRID VEHICLE CONTROL: HYBRID CONTROL SYSTEM: P0867-876: Transmission Fluid Pressure
DTC P0867-876 - Transmission Fluid Pressure
DTC P0867-878 - Transmission Fluid Pressure
DTC P0867-882 - Transmission Fluid Pressure
DTC P0989-899 - Transmission Fluid Pressure Sensor / Switch "E" Circuit Low
DESCRIPTION
For a description of the hybrid vehicle transmission assembly, P0731-871.
HINT: The ST-on state is a state which occurs briefly as the power switch is pressed to enter the READY-on state.
MONITOR DESCRIPTION
The hybrid vehicle control ECU monitors the hydraulic control system. If the line pressure circuit is malfunctioning, the ECU will illuminate the MIL and set a DTC.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
TYPICAL MALFUNCTION THRESHOLDS
COMPONENT OPERATING RANGE
WIRING DIAGRAM
HINT: Refer to oil pump motor circuit P2797-865.
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 (HYBRID VEHICLE CONTROL ECU CONNECTOR)
(a) Turn the power switch off.
(b) 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.
3. CHECK CONNECTOR CONNECTION CONDITION (TRANSMISSION WIRE CONNECTOR)
(a) Check the connection of the transmission wire connector.
Result:
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)
(a) Check the connection of the oil pump motor controller connector.
Result:
The connector is connected securely and there are no contact problems.
NG -- CONNECT SECURELY
OK -- Continue to next step.
5. CHECK HYBRID VEHICLE TRANSMISSION ASSEMBLY (SP SOLENOID VALVE, PB3 OIL PRESSURE SWITCH)
(a) Disconnect connector E84 from the hybrid vehicle control ECU.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
Result:
C -- CHECK HARNESS AND CONNECTOR (HV CONTROL ECU - TRANSMISSION WIRE)
B -- CHECK HARNESS AND CONNECTOR (HV CONTROL ECU - TRANSMISSION WIRE)
A -- Continue to next step.
6. CHECK HARNESS AND CONNECTOR (HV 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:
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.
(f) Turn the power switch off.
(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:
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
7. CHECK CONNECTOR CONNECTION CONDITION (OIL PUMP MOTOR CONTROLLER CONNECTOR)
(a) 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.
8. 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.
9. 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.
10. CHECK HYBRID VEHICLE TRANSMISSION ASSEMBLY (OIL PUMP MOTOR CONTROLLER)
(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 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 HYBRID VEHICLE TRANSMISSION ASSEMBLY
OK -- Continue to next step.
11. CHECK OIL PUMP MOTOR CONTROLLER (POWER SOURCE CIRCUIT)
(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:
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.
(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) Turn the power switch off.
(j) Disconnect connector A54 from the hybrid vehicle control ECU.
(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.
12. READ VALUE USING TECHSTREAM (LINE PRESSURE)
(a) Connect the hybrid vehicle control ECU connector.
(b) Disconnect connector E89 from the transmission wire.
(c) Connect the Techstream to the DLC3.
(d) Turn the power switch on (IG).
(e) Select the following menu items: Powertrain / Hybrid Control / Data List / Line Pressure.
(f) Check "Line Pressure" when terminal 8 (PB3) of the transmission wire vehicle side connector is connected to body ground, and when terminal 8 (PB3) is not connected to body ground.
Result:
NOTE: Turning the power switch on (IG) with the transmission wire connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.
NG -- CHECK HARNESS AND CONNECTOR (HV CONTROL ECU - TRANSMISSION WIRE)
OK -- Continue to next step.
13. CLEAR DTC
(a) Connect connector E89 to the transmission wire.
(b) Connect the Techstream to the DLC3.
(c) Turn the power switch on (IG).
(d) Read and record the DTCs and freeze frame data.
(e) Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
(f) Clear the DTCs.
NEXT -- Continue to next step.
14. CHECK DATA LIST (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 (Line Pressure, B2 Oil Pressure and Line Pressure Solenoid) for approximately 8 seconds after pressing the power switch with the brake pedal depressed.
Result:
Result:
C -- REPLACE HYBRID VEHICLE TRANSMISSION ASSEMBLY
B -- CHECK CONNECTOR CONNECTION CONDITION (PB3 OIL PRESSURE SWITCH)
A -- Continue to next step.
15. SIMULATION TEST
HINT: If the result of any of the following inspections is not acceptable, replace the hybrid vehicle transmission assembly.
(a) Turn the power switch on (READY).
(b) Select the following menu items: Powertrain / Hybrid Control / Data List / Line Pressure Solenoid, Line Pressure.
(c) When "Line Pressure Solenoid" is ON, check that "Line Pressure" is OFF.
Result:
No malfunction occurs after "LINE PRESS SOL" is ON for 10 seconds successively.
(d) Select the following menu items: Powertrain / Hybrid Control / Active Test / Control the Shift Position.
(e) Select the following menu items: User Data / B1 Oil Pressure, B2 Oil Pressure, Line Pressure, Line Pressure Solenoid.
(f) Perform the "Control the Shift Position" active test.
(g) Read the user data.
Result:
(h) Switch the shift position between "Lo" and "Hi" several times using the "Control the Shift Position" active test. Make sure that there is no abnormal data in the data list.
Result:
There is no abnormal data in the data list.
NOTE: Transmission system DTCs may be set if the "Control the Shift Position" active test is cancelled before it is completed.
(i) Turn the power switch on (IG).
(j) Select the following menu items: Powertrain / Hybrid Control / Active Test / Activate the Oil Pump (500rpm), Activate the Oil Pump (1000rpm).
(k) Select the following menu items: User Data / OPM Target Revolution, OPM Revolution.
(l) Perform the "Activate the Oil Pump (500rpm)" and "Activate the Oil Pump (1000rpm)" active tests.
(m) Read the user data.
Result:
"OPM Target Revolution" and "OPM Revolution" values are almost the same.
NOTE: Make sure that the auxiliary battery is not discharged.
NG -- REPLACE HYBRID VEHICLE TRANSMISSION ASSEMBLY
OK -- Continue to next step.
16. 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.
17. 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 -- Continue to next step.
18. CHECK CONNECTOR CONNECTION CONDITION (PB3 OIL PRESSURE SWITCH)
(a) Remove the oil strainer assembly Components.
(b) Check the connection of the PB3 oil pressure switch connector.
Result:
The connector is connected securely and there are no contact problems.
NG -- CONNECT SECURELY
OK -- Continue to next step.
19. CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE)
(a) Disconnect connector E89 from the transmission wire.
(b) Disconnect connector from the PB3 oil pressure switch.
(c) Turn the power switch on (IG).
(d) Measure the voltage according to the value(s) in the table below.
Standard voltage:
NOTE: Turning the power switch on (IG) with the transmission wire connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.
(e) Turn the power switch off.
(f) Measure the resistance according to the value(s) in the table below.
Standard resistance (Check for open):
Standard resistance (Check for short):
NG -- REPLACE TRANSMISSION WIRE
OK -- REPLACE PB3 OIL PRESSURE SWITCH
20. CHECK HARNESS AND CONNECTOR (HV CONTROL ECU - TRANSMISSION WIRE)
(a) Disconnect connector E89 from the transmission wire.
(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 hybrid vehicle control ECU 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 short):
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
21. CHECK CONNECTOR CONNECTION CONDITION (PB3 OIL PRESSURE SWITCH)
(a) Remove the oil strainer assembly Components.
(b) Check the connection of the PB3 oil pressure switch connector.
Result:
The connector is connected securely and there are no contact problems.
NG -- CONNECT SECURELY
OK -- Continue to next step.
22. CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE)
(a) Disconnect connector E89 from the transmission wire.
(b) Disconnect connector from the PB3 oil pressure switch.
(c) Turn the power switch on (IG).
(d) 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 connectors disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.
(e) Turn the power switch off.
(f) Measure the resistance according to the value(s) in the table below.
Standard resistance (Check for short):
NG -- REPLACE TRANSMISSION WIRE
OK -- REPLACE PB3 OIL PRESSURE SWITCH
23. CHECK HARNESS AND CONNECTOR (HV CONTROL ECU - TRANSMISSION WIRE)
(a) Disconnect connector E89 from the transmission wire.
(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 hybrid vehicle control ECU 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 -- REPLACE HYBRID VEHICLE TRANSMISSION ASSEMBLY
24. CHECK HARNESS AND CONNECTOR (HV CONTROL ECU - TRANSMISSION WIRE)
(a) Disconnect connector E84 from the hybrid vehicle control ECU.
(b) Disconnect connector E89 from the transmission wire.
(c) Turn the power switch on (IG).
(d) 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 connectors disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.
(e) Turn the power switch off.
(f) 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 -- REPLACE HYBRID VEHICLE CONTROL ECU
25. CHECK CONNECTOR CONNECTION CONDITION (PB3 OIL PRESSURE SWITCH)
(a) Remove the oil strainer assembly Components.
(b) Check the connection of the PB3 oil pressure switch connector.
Result:
The connector is connected securely and there are no contact problems.
NG -- CONNECT SECURELY
OK -- Continue to next step.
26. CHECK HARNESS AND CONNECTOR (TRANSMISSIONS WIRE)
(a) Disconnect connector E89 from the transmission wire.
(b) Disconnect connector from the PB3 oil pressure switch.
(c) Turn the power switch on (IG).
(d) Measure the voltage according to the value(s) in the table below.
Standard voltage:
NOTE: Turning the power switch on (IG) with the transmission wire connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.
(e) Turn the power switch off.
(f) Measure the resistance according to the value(s) in the table below.
Standard resistance (Check for open):
Standard resistance (Check for short):
NG -- REPLACE TRANSMISSION WIRE
OK -- REPLACE PB3 OIL PRESSURE SWITCH