P0873
L110 HYBRID VEHICLE CONTROL: HYBRID CONTROL SYSTEM: P0873-875: Transmission Fluid Pressure Sensor / Switch "C" Circuit High
DTC P0873-875 - Transmission Fluid Pressure Sensor / Switch "C" Circuit High
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.
WIRING DIAGRAM
For the wiring diagram, P0732-867.
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 HYBRID VEHICLE TRANSMISSION ASSEMBLY (PB1 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:
NG -- CHECK HARNESS AND CONNECTOR (HV CONTROL ECU - TRANSMISSION WIRE)
OK -- Continue to next step.
5. READ VALUE USING TECHSTREAM (B1 OIL 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 / B1 Oil Pressure.
(f) Check "B1 Oil Pressure" when terminal 11 (PB1) of the transmission wire vehicle side connector is connected to body ground, and when terminal 11 (PB1) 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.
6. 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.
7. SIMULATION TEST
(a) Turn the power switch on (READY).
(b) Select the following menu items: Powertrain / Hybrid Control / Active Test / Control the Shift Position.
(c) Select the following menu items: User Data / B1 Oil Pressure, B2 Oil Pressure, Line Pressure, Line Pressure Solenoid.
(d) Perform the "Control the Shift Position" active test.
(e) Read the user data.
Result:
(f) 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.
NG -- CHECK CONNECTOR CONNECTION CONDITION (PB1 OIL PRESSURE SWITCH)
OK -- Continue to next step.
8. 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.
9. 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.
10. CHECK CONNECTOR CONNECTION CONDITION (PB1 OIL PRESSURE SWITCH)
(a) Remove the oil strainer assembly Components.
(b) Check the connection of the PB1 oil pressure switch connector.
Result:
The connector is connected securely and there are no contact problems.
NG -- CONNECT SECURELY
OK -- Continue to next step.
11. CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE)
(a) Disconnect connector E89 from the transmission wire.
(b) Disconnect connector from the PB1 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 PB1 OIL PRESSURE SWITCH
12. 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:
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
13. CHECK CONNECTOR CONNECTION CONDITION (PB1 OIL PRESSURE SWITCH)
(a) Remove the oil strainer assembly. Components
(b) Check the connection of the PB1 oil pressure switch connector.
Result:
The connector is connected securely and there are no contact problems.
NG -- CONNECT SECURELY
OK -- Continue to next step.
14. CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE)
(a) Disconnect connector E89 from the transmission wire.
(b) Disconnect connector from the PB1 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 open):
Standard resistance (Check for short):
NG -- REPLACE TRANSMISSION WIRE
OK -- REPLACE PB1 OIL PRESSURE SWITCH
15. 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