P0878
L110F HYBRID VEHICLE CONTROL: HYBRID CONTROL SYSTEM: P0878-877: Transmission Fluid Pressure Sensor / Switch "D" Circuit High
DTC P0878-877 - Transmission Fluid Pressure Sensor / Switch "D" Circuit High
DESCRIPTION
For a description of the hybrid vehicle transmission assembly, P0731-871.
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
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 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 PB2 OIL PRESSURE SWITCH (SW2)
(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 INTELLIGENT TESTER OR TECHSTREAM (B2 OIL PRESS)
(a) Connect connector E55 to the hybrid vehicle control ECU.
(b) Disconnect the transmission wire connector.
(c) Turn the power switch on (IG).
NOTE: 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:
(1) Intelligent tester - Select: DIAGNOSIS / OBD/MOBD / HV ECU / DATA LIST / B2 OIL PRESS.
(2) Techstream - Select: Powertrain / Hybrid Control / Data List / B2 Oil Pressure.
(e) Check "B2 Oil Pressure" when terminal 10 (PB2) of the transmission wire vehicle side connector is connected to body ground, and when the terminal is not connected to body ground.
OK:
Intelligent Tester:
Techstream:
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:
(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.
7. SIMULATION TEST
(a) Turn the power switch on (READY).
(b) Select the following menu items:
(1) Intelligent tester - Select: DIAGNOSIS / OBD/MOBD / HV ECU / ACTIVE TEST / SHIFT.
(2) Techstream - Select: Powertrain / Hybrid Control / Active Test / Control the Shift Position.
(c) Select the following menu items:
(1) Intelligent tester - Select: USER DATA / B1 OIL PRESS, B2 OIL PRESS, LINE PRESS, LINE PRESS SOL.
(2) Techstream - Select: All Data / B1 Oil Pressure, B2 Oil Pressure, Line Pressure, Line Pressure Solenoid.
(d) Perform the "Control the Shift Position" active test.
OK:
Intelligent Tester:
Techstream:
(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.
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 (PB2 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
OK -- Continue to next step.
10. CHECK CONNECTOR CONNECTION CONDITION (PB2 OIL PRESSURE SWITCH) P0731-871
NG -- CONNECT SECURELY
OK -- Continue to next step.
11. CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE) P0731-871
NG -- REPLACE TRANSMISSION WIRE
OK -- REPLACE PB2 OIL PRESSURE SWITCH
12. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - TRANSMISSION WIRE)
(a) Turn the power switch off.
(b) Disconnect the transmission wire connector.
(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 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 -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
13. CHECK CONNECTOR CONNECTION CONDITION (PB2 OIL PRESSURE SWITCH) P0731-871
NG -- CONNECT SECURELY
OK -- Continue to next step.
14. CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE) P0731-871
NG -- REPLACE TRANSMISSION WIRE
OK -- REPLACE PB2 OIL PRESSURE SWITCH
15. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - TRANSMISSION WIRE) P0731-871
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE HYBRID VEHICLE CONTROL ECU