P0760
P0760Component Location:
General Description
The Automatic Transmission changes the gear position of the transmission by 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 TCM checks the Shift Control Solonian Valve C 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 C control solenoid circuit is malfunctioning and sets this code.
DTC Detecting Condition:
Schematic Diagram:
Monitor Scantool Data
1. Connect scantool to data link connector (DLC)
2. Engine "ON".
3. Measure voltage between terminal "6" of the sensor harness connector and chassis ground.
4. Select "N --> D"
Specification: "D" Range 2nd gear- 0 V, "D" Range 3rd gear- 12 V.
5. Is "SCSV-C" within the specifications?
YES - Fault is intermittent caused by poor contact in the sensor's and/or TCM (PCM)'s connector or was repaired and TCM (PCM) memory was not cleared. Throughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration or damage.Repair or replace as necessary and go to "Verification Vehicle Repair" procedure
NO - Go to "W/Harness Inspection" procedure
Terminal and Connector Inspection
1. Many malfunctions in the electrical system are caused by poor harness and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?
YES - Repair as necessary and then go to "Verification of Vehicle Repair" procedure
NO - Go to "Signal Circuit Inspection" procedure
Signal Circuit Inspection
1. Disconnect "A/T SOLENOID VALVE" connector.
2. IGNITION "ON", ENGINE "OFF"
3. Measure voltage between terminal "6" of the sensor harness connector and chassis ground.
Specification: Approx. 12 V
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 Vehicle Repair" procedure
- If signal circuit in harness is OK, Go to "Check PCM/TCM" of the "Component Inspection" procedure.
Component Inspection
Check Solenoid Valve
1. Ignition "OFF".
2. Disconnect "A/T SOLENOID VALVE" connector
3. Measure resistance between terminal "6" and chassis ground.
Specification: Approx. 22.3 ± 1.5 ohms (68 °F or 20 °C)
4. Is resistance within specifications?
YES - Go to "CHECK PCM/TCM" as below
NO - Replace SHIFT CONTROL SOLENOID VALVE-C as necessary and go to "Verification Vehicle Repair" procedure
Check PCM/TCM
5. Connect scantool to data link connector (DLC)
6. Ignition "ON" & Engine "OFF".
7. Select A/T Solenoid valve Actuator test and Operate Actuator test.
8. Can you hear operating sound for using "SHIFT CONTROL SOLENOID VALVE-C" Actuator Testing Function?
YES - Go to "Verification Vehicle Repair" procedure
NO - Replace PCM/TCM as necessary and Go to "Verification Vehicle Repair" procedure
NOTE: ACTUATOR TEST CONDITION
1. IG SWITCH ON
2. TRANSAXLE RANGE SWITCH is normal
3. P RANGE
4. Vehicle Speed 0 km/h
5. Throttle position sensor< 1 V
6. IDLE SWITCH ON
7. ENGINE RPM 0
Verification of Vehicle Repair
After a repair, it is essential to verify that the fault has been corrected.
1. Connect scan tool and select "Diagnostic Trouble Codes (DTCs)" mode.
2. Using a scantool, Clear DTC.
3. Operate the vehicle within DTC Enable conditions in General information.
4. Are any DTCs present?
YES - Go to the applicable troubleshooting procedure.
NO - System performing to specification at this time.