P0873

L110F HYBRID VEHICLE CONTROL: HYBRID CONTROL SYSTEM: P0873-875: Transmission Fluid Pressure Sensor / Switch "C" Circuit High
P0873-875 - Transmission Fluid Pressure Sensor / Switch "C" Circuit High

DESCRIPTION

Refer to the description for DTC P0732-867 P0731.





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.

WIRING DIAGRAM

For the wiring diagram, P0732.

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) Turn the power switch off.

(b) 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 PB1 OIL PRESSURE SWITCH (SW1)

(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:





NG -- CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - TRANSMISSION WIRE)
OK -- Continue to next step.

5. READ VALUE USING TECHSTREAM (B1 OIL PRESSURE)

(a) Connect connector E61 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 / B1 Oil Pressure.

(e) Read the data list.

OK:





NG -- CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - TRANSMISSION WIRE)
OK -- Continue to next step.

6. 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.

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: All Data / B1 Oil Pressure, B2 Oil Pressure, Line Pressure, Line Pressure Solenoid.

(d) Perform the "Control the Shift Position" active test.

OK:





(e) 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.

OK:

There is no abnormal data in the data list.

NOTICE:
Transmission system DTCs may be set if the "Control the Shift Position" active test is canceled 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 FLUID LEAKS

(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 Components
OK -- Continue to next step.

10. CHECK CONNECTOR CONNECTION CONDITION (PB1 OIL PRESSURE SWITCH) P0732

NG -- CONNECT SECURELY
OK -- Continue to next step.

11. CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE) P0732

NG -- REPLACE TRANSMISSION WIRE Components

OK -- REPLACE PB1 OIL PRESSURE SWITCH Components

12. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - TRANSMISSION WIRE)

(a) Disconnect connector E61 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:





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) 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.

13. CHECK CONNECTOR CONNECTION CONDITION (PB1 OIL PRESSURE SWITCH) P0732

NG -- CONNECT SECURELY
OK -- Continue to next step.

14. CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE) P0732

NG -- REPLACE TRANSMISSION WIRE Components

OK -- REPLACE PB1 OIL PRESSURE SWITCH Components

15. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - TRANSMISSION WIRE) P0732

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE HYBRID VEHICLE CONTROL ECU Components