Faulty Shift Solenoid Valve ‘A’
Shift Solenoid Valve ‘A’ harness is open or shorted
Shift Solenoid Valve ‘A’ circuit poor electrical connection
Engine Light ON (or Service Engine Soon Warning Light)
When shift solenoid valves A, B, C, D, and E are turned ON, the hydraulic pressure circuit opens. The hydraulic pressure circuit supplies/discharges hydraulic pressure to/from each clutch according to the combination of the ON/OFF status of the shift solenoid valves. The Powertrain Control Module (PCM) commands the driver circuit to turn on the shift solenoid valve. The circuit diagnoses malfunctions such as a circuit short or open, and sends back a return signal during the PCM’s command. When the return signal does not match the PCM command to turn ON the shift solenoid valve, the PCM detects a malfunction and stores a Diagnostic Trouble Code (DTC).