P0780

DTC P0780 SHIFT ERROR

COMPONENT LOCATION:

GENERAL DESCRIPTION
The TCU is control each solenoid-valve in order to maintain optimum gear shift.

DTC DESCRIPTION
The TCU set this code, when-the abnormal code is happened.

DTC DETECTING CONDITION:

SCHEMATIC DIAGRAM:

MONITOR SCANTOOL DATA
1. Connect Scantool to data link connector (DLC).
2. Engine "ON".
3. Monitor the all solenoid-valve parameters on the scan tool.
4. Shift gear at each position.











5. Does all "SOLENOID DUTY" follow the reference data?
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. 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 "Component inspection 1" procedure.

COMPONENT INSPECTION 1
1. IG KEY OFF.
2. Remove the TCU.
3. Measure the resistance between "S1" solenoid-valve terminal and ground terminal of "S1" solenoid-valve.
4. Measure the resistance between "S2" solenoid-valve terminal and ground terminal of "S2" solenoid-valve.
Specification: Approximately 11-15 Ohms (20°C)
5. Is resistance within specifications?
YES
- Go to "Component inspection 2" procedure.
NO
- Replace solenoid-valve as necessary and Go to "Verification of Vehicle Repair" procedure.

COMPONENT INSPECTION 2
1. IG KEY OFF.
2. Remove the TCU.
3. Measure the resistance of "SLC1" "SLC2" "SLC3" "SLB1" solenoid-valves.
Specification: Approximately 5.0 - 5.6 Ohms (20°C)
4. Is resistance within specifications?
YES
- Substitute with a known-good PCM/TCM and check for proper operation. If the problem is corrected, replace PCM/TCM as necessary and then go to "Verification of Vehicle Repair" procedure.
NO
- Replace solenoid-valve as necessary and Go to "Verification of Vehicle Repair" procedure.

NOTE: When replacing the TCU, must perform the N position learning and the Initial learning.

VERIFICATION OF VEHICLE REPAIR
After a repair, it is essential to verify that the fault has been corrected.
1. Connect Scantool 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.