P0715

DTC P0715 INPUT SPEED SENSOR CIRCUIT





COMPONENT LOCATION

GENERAL DESCRIPTION
The input (turbine) speed sensor outputs pulse-signals according to the revolutions of the input shaft of the transmission. The TCM determines the input shaft speed by counting the frequency of the pulses. This value is mainly used to control the optimum fluid pressure during shifting.

DTC DESCRIPTION
The TCM sets this code if an output pulse-signal is not detected from the input speed sensor, when the vehicle is running faster than 30 km/h. The Fail-Safe function will be set by the TCM if this code is detected.





DTC DETECTING CONDITION

SPECIFICATION
Input shaft & Output shaft speed sensor
^ Type: Hall sensor
^ Current consumption: 22mA(MAX)
^ sensor body and sensor connector have been unified as one.





SIGNAL WAVEFORM

MONITOR SCANTOOL DATA
1. Connect scantool to data link connector (DLC).
2. Engine "ON".
3. Monitor the "INPUT SPEED SENSOR" parameter on the scantool.





4. Driving at speed of over 19 Mile/h (30 Km/h).
Specification: Increasing Gradually
5. Does "input speed sensor" 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 Vehicle Repair" procedure.
NO >>
^ Go to "Terminal & Connector inspection" procedure.

TERMINAL & CONNECTOR INSPECTION
1. Many malfunctions in the electrical system may be caused from poor harness and terminals. These faults can 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 go to "Verification vehicle Repair" procedure.
NO >>
^ Go to "Signal Supply circuit inspection" procedure.

SIGNAL CIRCUIT INSPECTION
1. Ignition "ON" & Engine "OFF".
2. Disconnect the "INPUT SPEED SENSOR" connector.





3. Measure voltage between terminal "2" of the INPUT SPEED SENSOR harness connector and chassis ground.
Specification: approximately 5V
4. Is voltage within specification?
YES >>
^ Go to "Power Supply circuit 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.

POWER SUPPLY CIRCUIT INSPECTION
1. Ignition "ON" & Engine "OFF".
2. Disconnect the "INPUT SPEED SENSOR" connector.





3. Measure voltage between terminal "3" of the INPUT SPEED SENSOR harness connector and chassis ground.
Specification: approximately B+
4. Is voltage within specification?
YES >>
^ Go to "Ground circuit inspection" procedure.
NO >>
^ Check for open in harness. Repair as necessary and Go to "Verification Vehicle Repair" procedure.

GROUND CIRCUIT INSPECTION
1. Ignition "ON" & Engine "OFF".
2. Disconnect the "INPUT SPEED SENSOR" connector.





3. Measure resistance between terminal "1" of the INPUT SPEED SENSOR harness connector and chassis ground.
Specification: approximately 0 Ohms
4. Is resistance within specification ?
YES >>
^ Go to "Component Inspection" procedure.
NO >>
^ Check for open in harness. Repair as necessary and Go to "Verification Vehicle Repair" procedure. If ground circuit in harness is OK, Go to "Check PCM/TCM" of the "Component Inspection" procedure.

COMPONENT INSPECTION
1. Check "INPUT SPEED SENSOR"
1. ignition "OFF".
2. Disconnect the "INPUT SPEED SENSOR" connector.





3. Measure resistance between terminal "1", "2" and "2", "3" and "1", "3" of the "INPUT SPEED SENSOR" connector.
Specification: Refer to "Reference data"
4. Is resistance within specifications?





[REFERENCE DATA]

YES >>
^ Go to "CHECK PCM/TCM" as below.
NO >>
^ Replace "INPUT SPEED SENSOR" as necessary and Go to "Verification Vehicle Repair" procedure.

2. CHECK PCM/TCM
1. Ignition "ON" & Engine "OFF".
2. Connect "INPUT SPEED SENSOR" connector.
3. Install scantool and select a SIMU-SCAN.





4. Simulate frequency to INPUT SPEED SENSOR signal circuit.
5. Is "INPUT SPEED SENSOR" signal value changed according to simulation frequency?
YES >>
^ Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure.
NO >>
^ 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.

VERIFICATION OF VEHICLE REPAIR
Refer to DTC P0560. P0560