P0868 SECONDARY PRESSURE DOWN

Description
The pressure control solenoid valve B (secondary pressure solenoid valve) regulates the secondary pressure to suit the driving condition in response to a signal sent from the TCM.

DTC Logic

DTC DETECTION LOGIC

1. Turn ignition switch ON.
2. Select "DATA MONITOR".
3. Make sure that output voltage of CVT fluid temperature sensor is within the range below.

ATF TEMP SEN : 1.0 - 2.0 V
If out of range, drive the vehicle to decrease the voltage (warm up the fluid) or stop engine to increase the voltage (cool down the fluid)

4. Start engine and maintain the following conditions for at least 10 consecutive seconds.

VEHICLE SPEED (accelerate slowly) : 0 --> 50 km/h (31 MPH)
ACC PEDAL OPEN : 0.5/8 - 1.0/8
RANGE : "D" position

Is "P0868 SEC/PRESS DOWN" detected?
YES >> Go to Diagnosis Procedure.
NO >> Check intermittent incident. Refer to See: Testing and Inspection\Initial Inspection and Diagnostic Overview\Service Information For Electrical Incident\Intermittent Incident.

Diagnosis Procedure
1.CHECK LINE PRESSURE
Perform line pressure test. Refer to See: Transmission and Drivetrain\Continuously Variable Transmission/Transaxle\Description and Operation\CVT RE0F09B\Line Pressure Test.
Is the Inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace damaged parts. Refer to See: Transmission and Drivetrain\Continuously Variable Transmission/Transaxle\Description and Operation\CVT RE0F09B\Line Pressure Test.
2.CHECK PRESSURE CONTROL SOLENOID VALVE B (SECONDARY PRESSURE SOLENOID VALVE)

1. Turn ignition switch OFF.
2. Disconnect CVT unit harness connector.
3. Check pressure control solenoid valve B (secondary pressure solenoid valve). Refer to Component Inspection [Pressure Control Solenoid Valve B (Secondary Pressure Solenoid Valve)]. Is the Inspection result normal?

YES >> GO TO 3.
NO >> Repair or replace damaged parts.
3.CHECK PRESSURE CONTROL SOLENOID VALVE A (LINE PRESSURE SOLENOID VALVE)
Check pressure control solenoid valve A (line pressure solenoid valve). Refer to Component Inspection [Pressure Control Solenoid Valve A (Line Pressure Solenoid Valve)].
Is the Inspection result normal?
YES >> GO TO 4.
NO >> Repair or replace damaged parts.
4.CHECK TRANSMISSION FLUID PRESSURE SENSOR A (SECONDARY PRESSURE SENSOR) SYSTEM
Check transmission fluid pressure sensor A (secondary pressure sensor) system. Refer to See: P0840\CVT RE0F09B See: P0840\CVT RE0F09B See: P0840\CVT RE0F09B, "DTC Logic".
Is the Inspection result normal?
YES >> GO TO 5.
NO >> Repair or replace damaged parts.
5.DETECT MALFUNCTIONING ITEMS
Check TCM connector pin terminals for damage or loose connection with harness connector.
Is the Inspection result normal?
YES >> Replace TCM. Refer to See: Powertrain Management\Transmission Control Systems\Control Module, CVT\Service and Repair\CVT RE0F09B\Exploded View.
NO >> Repair or replace damaged parts.

Component Inspection [Pressure Control Solenoid Valve A (Line Pressure Solenoid Valve)]
1.CHECK PRESSURE CONTROL SOLENOID VALVE A (LINE PRESSURE SOLENOID VALVE)