Description
Using the engine load (throttle position), the primary pulley revolution speed, and the secondary pulley revolution speed as input signal, TCM changes the operating pressure of the primary pulley and the secondary pulley and changes the groove width of the pulley to control the gear ratio.
DTC Logic
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
CAUTION: Always drive vehicle at a safe speed.
NOTE:
If "DTC CONFIRMATION PROCEDURE" has been previously performed, always turn ignition switch OFF.
Then wait at least 10 seconds before performing the next test. 1.CHECK DTC DETECTION
With CONSULT-III
Turn ignition switch ON.
Select "DATA MONITOR".
Start engine and maintain the following conditions for at least 12 consecutive seconds.
VEHICLE SPEED : 40 km/h (25 MPH) or more
RANGE : "D" position
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 5.
NO >> Repair or replace damaged parts. 5.CHECK PRESSURE CONTROL SOLENOID VALVE B (SECONDARY PRESSURE SOLENOID VALVE)
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 6.
NO >> Repair or replace damaged parts. 6.CHECK STEP MOTOR SYSTEM
Check step motor system. Refer to See: P1777\CVT RE0F09B.
Is the Inspection result normal?
YES >> GO TO 7.
NO >> Repair or replace damaged parts. 7.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)
Check resistance between CVT unit terminal 2 and ground.