P0722
DTC P0722
GENERAL DESCRIPTION
The OUTPUT SPEED SENSOR(PG-B) outputs waveform signals according to the revolutions of the output shaft of the transmission. The OUTPUT SPEED SENSOR(PG-B) is installed in front of the Transfer Drive Gear and determine the Transfer Drive Gear rpms by calculating the frequency of the pulses. This value, together with the throttle position data, is mainly used to decide the optimum gear position.
DTC DESCRIPTION
The PCM sets this code if the calculated value of the pulse-signal is noticeably different from the value calculated, using the Vehicle Speed Sensor output, when the vehicle is running faster than 19 mph(30 km/h). The PCM will initiate the fail safe function if this code is detected.
DTC DETECTING CONDITION
SPECIFICATION
Input shaft & Output shaft speed sensor
Type : Magnetic Inductive Type
Sensor body and sensor connector have been unified as one.
SCHEMATIC DIAGRAM
SIGNAL WAVEFORM
MONITOR SCANTOOL DATA
1. Connect scantool to data link connector(DLC).
2. Engine "ON".
3. Monitor the "OUTPUT SPEED SENSOR(PG-B)" parameter on the scan tool.
4. Driving at speed of over 30 Km/h(19 mile/h).
Specification : Increasing gradually with increase in temperature
5. Does "OUTPUT SPEED SENSOR(PG-B)" follow the referance 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
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 of vehicle repair" procedure.
NO
Go to "Signal circuit inspection" procedure.
SIGNAL CIRCUIT INSPECTION
1. Ignition "ON"& Engine "OFF".
2. Disconnect the "OUTPUT SPEED SENSOR(PG-B)" connector.
3. Measure voltage between terminal "1" of the OUTPUT SPEED SENSOR(PG-B) harness connector and chassis ground.
Specification : approx. 1.45 V
4. Is voltage within specification?
YES
Go to "Ground 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.
GROUND CIRCUIT INSPECTION
1. Ignition "ON"& Engine "OFF".
1. Disconnect the "OUTPUT SPEED SENSOR(PG-B)" connector.
1. Measure voltage between terminal "2" of the OUTPUT SPEED SENSOR(PG-B) harness connector and chassis ground.
Specification : approx. 1.17 V
4. Is voltage 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(PG-B)"
A. Ignition "OFF".
B. Disconnect the "OUTPUT SPEED SENSOR" connector.
C. Measure resistance between terminal "1" and "2" of the "OUTPUT SPEED SENSOR(PG-B)" connector.
Specification: 245 ± 30 ohms / 20°C (68°F)
D. Is resistance within specifications?
YES
Go to "CHECK PCM" as below.
NO
Replace "OUTPUT SPEED SENSOR(PG-B)" as necessary and go to "Verification of vehicle repair" procedure.
2. CHECK PCM
A. Ignition "ON"& Engine "OFF".
B. Connect "OUTPUT SPEED SENSOR" connector.
C. Install scantool and select SIMU-SCAN mode.
D. Simulate frequency to "OUTPUT SPEED SENSOR(PG-B)" signal circuit.
E. Is "OUTPUT SPEED SENSOR(PG-B)" 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
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.