RM36D0EC _52 Drivetrain _138817 K121F CVT _0596468 CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM C

K121F CVT  CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM  P084011  Transmission Fluid Pressure Sensor/Switch "A" Circuit Short To Ground  


DESCRIPTION

The ECM performs learning control for the belt clamping pressure based on the belt clamping pressure signal, which is output by the oil pressure sensor.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL DTC Output from Priority Note
P084011 Transmission Fluid Pressure Sensor/Switch "A" Circuit Short To Ground When 2 seconds or more have elapsed since engine start, a short to ground is detected in the oil pressure sensor circuit for 0.5 seconds or more (1-trip detection logic).
·

Wire harness or connector

·

Oil pressure sensor

·

ECM


Comes on Engine A SAE Code:
P0842

MONITOR DESCRIPTION

This DTC indicates a short to ground in the oil pressure sensor circuit. If there is a short to ground in the oil pressure sensor circuit, the ECM detects the malfunction, illuminates the MIL and stores a DTC.

CONFIRMATION DRIVING PATTERN

HINT:
·

After repairs have been completed, clear the DTCs and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.

·

When clearing the permanent DTCs, refer to the Clear Permanent DTC procedure.

Click hereDrivetrain>K121F (CVT)>CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM>DTC CHECK / CLEAR



1.

Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

2.

Turn the ignition switch off and wait for 2 minutes or more.

3.

Start the engine and wait for 5 seconds or more. [*1]

HINT:

[*1]: Normal judgment procedure.

The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.


4.

Enter the following menus: Powertrain / Engine / Utility / All Readiness.

5.

Input the DTC: P084011.

6.

Check the DTC judgment result.

GTS Display Description
NORMAL
·

DTC judgment completed

·

System normal


ABNORMAL
·

DTC judgment completed

·

System abnormal


INCOMPLETE
·

DTC judgment not completed

·

Perform driving pattern after confirming DTC enabling conditions


N/A
·

Unable to perform DTC judgment

·

Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit



HINT:
·

If the judgment result shows NORMAL, the system is normal.

·

If the judgment result shows ABNORMAL, the system has a malfunction.

·

If the judgment result shows INCOMPLETE or N/A, perform the normal judgment procedure again.




WIRING DIAGRAM

C318995E92
1.094,2.802 2.781,3 1.688,0.198 10 false Oil Pressure Sensor 5.323,3.083 6.135,3.448 0.813,0.365 10 false ECM 1.094,2.656 1.552,2.854 0.458,0.198 10 false C38 5.323,2.917 6.042,3.208 0.719,0.292 10 false C71 4.906,2.156 5.521,2.354 0.615,0.198 10 false EPTO 4.906,1.604 5.521,1.802 0.615,0.198 10 false PTO 4.906,1.125 5.521,1.323 0.615,0.198 10 false VCPT 2.135,1.24 2.75,1.438 0.615,0.198 10 false VC 2.063,1.729 2.677,1.927 0.615,0.198 10 false PTO 2.156,2.271 2.771,2.469 0.615,0.198 10 false E2 2.469,2.167 3.083,2.365 0.615,0.198 10 false 1 2.469,1.604 3.083,1.802 0.615,0.198 10 false 2 2.469,1.125 3.083,1.323 0.615,0.198 10 false 3 4.552,1.125 5.167,1.323 0.615,0.198 10 false 121 4.552,1.615 5.167,1.813 0.615,0.198 10 false 122 4.552,2.156 5.167,2.354 0.615,0.198 10 false 120 5.583,0.948 6.198,1.146 0.615,0.198 10 false 5 V

CAUTION / NOTICE / HINT

CAUTION:
·
C328184

Do not perform a stall test if there are any people or objects near the vehicle.

·

The vehicle could begin moving suddenly, resulting in a serious accident.


·
C328186

Do not perform a stall test if any wheel chock is out of position.

·

The vehicle could begin moving suddenly, resulting in a serious accident.


·
C328185

Do not perform the stall test on a slippery or low-friction surface that could allow the tires to spin.

·

The vehicle could begin moving suddenly, resulting in a serious accident.



NOTICE:
·

Perform the universal trip to clear permanent DTCs.

Click hereDrivetrain>K121F (CVT)>CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM>DTC CHECK / CLEAR

·

Perform registration and/or initialization when parts related to the continuously variable transaxle system are replaced.

Click hereDrivetrain>K121F (CVT)>CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM>PRECAUTION

·

Check that no DTCs are stored after performing initialization.

Click hereDrivetrain>K121F (CVT)>CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM>DTC CHECK / CLEAR



PROCEDURE

1.READ VALUE USING GTS (BELT CLAMPING FORCE SENSOR)
CAUTION:

A stall speed test should always be performed with at least 2 people. One person should observe the condition of the wheels and wheel chocks while the other is performing the test.


NOTICE:
·

This test must be performed after checking and confirming that the engine is normal.

·

Perform this test with the CVT fluid temperature between 50 and 100°C (122 and 212°F).

·

Perform this test with the air conditioning off.

·

Do not perform the stall speed test for longer than 5 seconds.

·

When performing the stall speed test repeatedly, wait for 15 seconds or more between tests.

·

Perform this test with the AUTO function (shift-linked function) of the electric parking brake system off.



Pre-procedure1

a.

Warm up the engine.


b.

Fully apply the parking brake and chock all 4 wheels.

HINT:

When the parking brake indicator (red) is illuminated after the electric parking brake switch (integration control and panel assembly) has been pulled to the lock side, the maximum amount of braking force is applied if the electric parking brake switch (integration control and panel assembly) is pulled to the lock side one more time.



Procedure1

c.

According to the display on the GTS, perform the Active Test.

Powertrain > Engine > Active Test
Tester Display Measurement Item Control Range Diagnostic Note
Activate the TC Terminal Turn on and off TC and TE1 (CG) connection ON or OFF
·

ON: TC and TE1 are connected.

·

OFF: TC and TE1 are disconnected.


(Vehicle Condition)

Ignition switch ON, engine stopped and shift lever in P



d.

According to the display on the GTS, read the Data List.

Powertrain > Engine > Data List
Tester Display Measurement Item Range Normal Condition Diagnostic Note
Belt Clamping Force Sensor Secondary oil pressure value Min.: -64 MPa
Max.: 63.998 MPa 		Secondary oil pressure inspection:
3.0 to 7.0 MPa (30.6 to 71.4 kgf/cm2, 435 to 1015 psi): D position stall test 		-
Powertrain > Engine > Active Test
Active Test Display
Activate the TC Terminal
Data List Display
Belt Clamping Force Sensor
50004 372 22 367
Result:
Result Proceed to
The value of Belt Clamping Force Sensor is 3.0 MPa or more, and 7.0 MPa or less A
The value of Belt Clamping Force Sensor is more than 7.0 MPa, or less than 3.0 MPa B


HINT:
·

3.0 MPa = 30.6 kgf/cm2, 435 psi

·

7.0 MPa = 71.4 kgf/cm2, 1015 psi




Post-procedure1

e.

None



A

2.REPLACE ECM

B

3.CHECK ECM (VCPT TERMINAL VOLTAGE)
3.CHECK ECM (VCPT TERMINAL VOLTAGE)

Pre-procedure1

a.

Disconnect the C38 oil pressure sensor connector.


b.

Turn the ignition switch to ON.


Procedure1

c.
C399499C58
1.448,0.125 1.865,0.375 0.417,0.25 1.031,1.813 1.448,1.146 true 2.323,1.813 1.906,1.146 true 0.167,0.177 0.479,0.333 0.313,0.156 10 false *a 2.365,1.74 2.677,1.938 0.313,0.198 10 false VC 0.823,1.729 1.135,1.927 0.313,0.198 10 false E2 1.542,0.167 2,0.365 0.458,0.198 10 false C38
*a Front view of wire harness connector (to Oil Pressure Sensor)


Measure the voltage according to the value(s) in the table below.

Standard Voltage:
Tester Connection Condition Specified Condition
C38-3 (VC) - C38-1 (E2) Ignition switch ON 4.75 to 5.25 V


Result:
Proceed to
OK
NG



Post-procedure1

d.

Turn the ignition switch off.


e.

Connect the C38 oil pressure sensor connector.



OK

4.CHECK HARNESS AND CONNECTOR (OIL PRESSURE SENSOR - ECM)

NG

10.CHECK HARNESS AND CONNECTOR (OIL PRESSURE SENSOR - ECM)
4.CHECK HARNESS AND CONNECTOR (OIL PRESSURE SENSOR - ECM)

Pre-procedure1

a.

Disconnect the C38 oil pressure sensor connector.


b.

Disconnect the C71 ECM connector.


Procedure1

c.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
C38-2 (PTO) - C71-122 (PTO) Always Below 1 Ω
C38-2 (PTO) or C71-122 (PTO) - Body ground and other terminals Always 10 kΩ or higher


Result:
Proceed to
OK
NG



Post-procedure1

d.

Connect the C71 ECM connector.


e.

Connect the C38 oil pressure sensor connector.



OK

5.REPLACE OIL PRESSURE SENSOR

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (OIL PRESSURE SENSOR - ECM)

5.REPLACE OIL PRESSURE SENSOR
HINT:

Click hereDrivetrain>K121F (CVT)>OIL PRESSURE SENSOR>REMOVAL


Result:
Proceed to
NEXT



NEXT

6.CLEAR DTC
6.CLEAR DTC
a.

Clear the DTCs.

Powertrain > Engine > Clear DTCs
50002 372

Result:
Proceed to
NEXT



NEXT

7.PERFORM INITIALIZATION
8.CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED (P084011)
a.

Read the DTCs.

Powertrain > Engine > Trouble Codes
50001 372

Result:
Result Proceed to
DTCs are not output A
P084011 is output B



A

END

B

9.REPLACE ECM
10.CHECK HARNESS AND CONNECTOR (OIL PRESSURE SENSOR - ECM)

Pre-procedure1

a.

Disconnect the C38 oil pressure sensor connector.


b.

Disconnect the C71 ECM connector.


Procedure1

c.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
C38-3 (VC) - C71-121 (VCPT) Always Below 1 Ω
C38-1 (E2) - C71-120 (EPTO) Always Below 1 Ω
C38-3 (VC) or C71-121 (VCPT) - Body ground and other terminals Always 10 kΩ or higher
C38-1 (E2) or C71-120 (EPTO) - Body ground and other terminals Always 10 kΩ or higher


Result:
Proceed to
OK
NG



Post-procedure1

d.

Connect the C71 ECM connector.


e.

Connect the C38 oil pressure sensor connector.



OK

11.REPLACE ECM

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (OIL PRESSURE SENSOR - ECM)