P0755

DTC P0755 SHIFT CONTROL SOLENOID VALVE B CIRCUIT MALFUNCTION

COMPONENT LOCATION
Refer to DTC P0743. P0743

GENERAL DESCRIPTION
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).

DTC DESCRIPTION
The PCM checks the Shift Control Solenoid Valve B 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 PCM judges that SCSV B control solenoid circuit is malfunctioning and sets this code.

DTC DETECTING CONDITION:

SCHEMATIC DIAGRAM
Refer to DTC P0741. P0741

MONITOR SCANTOOL DATA
1. Connect Scantool to data link connector(DLC).
2. Engine "ON".
3. Measure voltage between terminal "X of the sensor harness connector and chassis ground.
4. Shift 2nd - 3rd.





5. Is "SCSV-B" within the specifications?
YES
^ Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration or damage. Repair or replace as necessary and go to "Verification of vehicle repair" procedure.

NO
^ Go to "Terminal & connector inspection" procedure.

TERMINAL & CONNECTOR INSPECTION
Refer to DTC P0743. P0743

SIGNAL CIRCUIT INSPECTION
1. Disconnect "A/T SOLENOID VALVE" connector.
2. IGNITION "ON", ENGINE "OFF".
3. Measure voltage between terminal "3" of the sensor harness connector and chassis ground.





4. Is voltage within specifications?
YES
^ Go to "Component inspection" procedure.

NO
^ Check for open or short in harness. Repair as necessary and Go to "Verification of vehicle repair" procedure.
^ If signal circuit in harness is OK, Go to "Check PCM" of the "Component inspection" procedure

COMPONENT INSPECTION
1. CHECK SOLENOID VALVE
1) Ignition "OFF".
2) Disconnect "A/T SOLENOID VALVE" connector.
3) Measure resistance between terminal "3" and chassis ground.





4) Is resistance within specification?
YES
^ Go to "CHECK PCM" as below.

NO
^ Replace SHIFT CONTROL SOLENOID VALVE-B as necessary and go to "Verification of vehicle repair" procedure.

2. CHECK PCM
1) Connect Scantool to data link connector(DLC).
2) Ignition "ON" & Engine "OFF".
3) Select A/T solenoid valve actuator test and operate actuator test.
4) Can you hear operating sound for "TCC SOLENOID VALVE" actuator testing function?

YES
^ Go to "Verification of vehicle repair" procedure.

NO
^ Replace PCM as necessary and Go to "Verification of vehicle repair" procedure

ACTUATOR TEST CONDITION
1. IG SWITCH ON
2. TRANSAXLE RANGE SWITCH is normal
3. P RANGE
4. Vehicle speed 0 mph(0 km/h)
5. Throttle position sensor < 1 V
6. IDLE SWITCH ON
7. ENGINE RP.

VERIFICATION OF VEHICLE REPAIR
Refer to DTC P0741. P0741