The Automatic Transmission changes the gear position of the transmission utilizing a combination of Clutches and Brakes, which are controlled by solenoid valves. The New Alpha Automatic Transmission consists of a: LR (Low and Reverse Brake), KD (Kick Down Brake), FC (Front Clutch), RC (Rear Clutch), and EC (End Clutch). The gear position is determined by the combination of 3 kinds of Shift Control Solenoid Valves. ( SCSV A , SCSV B, SCSV C )
The TCM checks the Shift Control Solenoin Valve A control signal by monitoring the feedback signal from the solenoid valve drive circuit. If an unexpected signal is monitored, (For example, high voltage is detected when low voltage is expected, or low voltage is detected when high voltage is expected) the TCM judges that SCSV A control solenoid circuit is malfunctioning and sets this code.
Item | Detecting Condition & Limp Home | Possible Cause |
DTC Strategy | ● Proper functional response and circuit continuity | ● Check line open and short between PCM C33-2 terminal 33 and A/T solenoid C04 terminal 2 ● Check for SCSV-A faulty ● Check PCM faulty |
Enable Conditions | ● None | |
Threshold Value | ● Solenoid is turned on and circuit is short ● Solenoid is turned off and circuit is open | |
Diagnostic Time | ● More than 0.3sec | |
Fail Safe | ● 3rd HOLD in D RANGE, 2nd HOLD in 2,L RANGE |