P0722
DTC P0722 OUTPUT SPEED SENSOR CIRCUIT - NO SIGNALCOMPONENT LOCATION
Refer to DTC P0717. P0717
GENERAL DESCRIPTION
The output speed Sensor calculates the number of rotations of the transfer drive gear, which means that the sensor calculates the frequency of electric signal that is occurred at the transfer drive gear's rotating. The signal is inputted to the PCM and is used as the main signal which decides the optimum gear position with Assignable.
DTC DESCRIPTION
The PCM sets this code if the calculated value of the pulse-signal from the output speed sensor is noticeably different from the calculated value from vehicle speed sensor, when the vehicle is running faster than 30 km/h. The PCM will initiate the fail safe function if this, code is detected.
DTC DETECTING CONDITION
DTC DETECTING CONDITION:
SPECIFICATION
Refer to DTC P0717. P0717
SIGNAL WAVEFORM
Refer to DTC P0717. P0717
MONITOR SCAN TOOL DATA
1. Connect SCAN TOOL to data link connector (DLC).
MONITOR SCAN TOOL DATA
1. Connect SCAN TOOL to data link connector (DLC).
2. Engine ON.
3. Monitor the OUTPUT SPEED SENSOR parameter on the SCAN TOOL.
4. Driving at speed of over 30 km/h (19 mph).
Specification: Increasing Gradually
Specification:
5. Does Output speed sensor follow the reference data?
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 P0717. P0717
SIGNAL CIRCUIT INSPECTION
1. Ignition ON & Engine OFF.
2. Disconnect the OUTPUT SPEED SENSOR connector.
3. Measure voltage between terminal 2 of the OUTPUT SPEED SENSOR harness connector and chassis ground.
Specification: Approximately 5 V
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 of Vehicle Repair procedure. If signal circuit in harness is OK, go to Check PCM of the Component inspection procedure.
POWER SUPPLY CIRCUIT INSPECTION
1. Ignition ON & Engine OFF.
2. Disconnect the OUTPUT SPEED SENSOR connector.
3. Measure voltage between terminal 3 of the OUTPUT SPEED SENSOR harness connector and chassis ground.
Specification: approximately B+
Specification:
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 of Vehicle Repair procedure.
GROUND CIRCUIT INSPECTION
1. Ignition ON & Engine OFF.
2. Disconnect the OUTPUT SPEED SENSOR connector.
3. Measure resistance between terminal 1 of the OUTPUT SPEED SENSOR harness connector and chassis ground.
Specification: approximately 0 Ohms
Specification:
4. Is resistance within specification?
YES > Go to Component inspection procedure.
NO > Check for open in harness. Repair as necessary and go to Verification of Vehicle Repair procedure. If ground circuit in harness is OK, go to Check PCM of the Component inspection procedure.
COMPONENT INSPECTION
1. Check OUTPUT SPEED SENSOR
1. Ignition OFF.
2. Disconnect the OUTPUT SPEED SENSOR connector.
3. Measure resistance between terminal 1,2 and 2,3 and 1,3 of the OUTPUT SPEED SENSOR connector.
Specification: Refer to Reference data
Specification:
4. Is resistance within specifications?
[REFERENCE DATA]
REFERENCE DATA:
YES > Go to CHECK PCM.
NO > Replace OUTPUT SPEED SENSOR as necessary and go to Verification of Vehicle Repair procedure.
2. CHECK PCM
1. Ignition ON & Engine OFF.
2. Connect OUTPUT SPEED SENSOR connector.
3. Install SCAN TOOL and select a SIMU-SCAN.
4. Simulate frequency to OUTPUT SPEED SENSOR signal circuit.
5. Is OUTPUT 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 and check for proper operation. If the problem is corrected, replace PCM as necessary and then go to Verification of vehicle repair procedure.
VERIFICATION OF VEHICLE REPAIR
Refer to DTC P0717. P0717