4.
Driving at speed of over 30 km/h.
Specification : Increasing Gradually
Fig 1) "P,N" Range
Fig 2) "D" Range, Low Speed
Fig 3) "D" Range, High Speed
The Output Speed Sensor outputs pulse-signals according to the revolutions of the output shaft of the transmission. The Output Speed Sensor is installed in front of the Transfer Drive Gear to determine the Transfer Drive Gear rpms by counting the frequency of the pulses. This value, together with the throttle position data, is mainly used to decide the optimum gear position.
The TCM 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 30 km/h. The TCM will initiate the fail safe function if this code is detected.
Item | Detecting Condition | Possible Cause |
DTC Strategy | ● Speed rationality check | ● Signal circuit is open or short ● Sensor power circuit is open ● Sensor ground circuit is open ● Faulty OUTPUT SPEED SENSOR ● Faulty PCM |
Enable Conditions | ● Battery Voltage ≥ 10V ● Lever position : D,3,2,L ● State of brake : OFF | |
Threshold Value | ● Output speed = 0 | |
Diagnostic Time | ● More than 1sec | |
Fail Safe | ● Locked into 3rd or 2nd gear. ● Apply an electric current to Solenoide valve ● Manual shifting is possibe(2 nd → 3 rd ,3 rd → 2 nd) |
Input shaft & Output shaft speed sensor
Type : Hall sensor
Current consumption : 22mA(MAX)
Sensor body and sensor connector have been unified as one
Fig 1) OUTPUT SIGNAL → LOW SPEED
Fig 2) OUTPUT SIGNAL → HIGH SPEED
Connect scantool to data link connector(DLC)
Engine "ON" .
Monitor the "OUTPUT SPEED SENSOR" parameter on the scantool.
Driving at speed of over 30 km/h.
Specification : Increasing Gradually
Fig 1) "P,N" Range
Fig 2) "D" Range, Low Speed
Fig 3) "D" Range, High Speed
Does "output speed sensor " follow the referance data?
 | ▶ 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. |
 | ▶ Go to "W/Harness Inspection" procedure. |
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.
Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
Has a problem been found?
| ▶ Repair as necessary and go to "Verification vehicle Repair" procedure |
| ▶ Go to "Signal circuit inspection" procedure |
Ignition "ON" & Engine "OFF".
Disconnect the "OUTPUT SPEED SENSOR" connector.
Measure voltage between terminal "2" of the OUTPUT SPEED SENSOR harness connector and chassis ground .
Specification : Approx. 5 V
Is voltage within specifications ?
| ▶ Go to "Power circuit Inspection" procedure . |
| ▶ 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. |
Ignition "ON" & Engine "OFF".
Disconnect the "OUTPUT SPEED SENSOR" connector.
Measure voltage between terminal "3" of the OUTPUT SPEED SENSOR harness connector and chassis ground .
Specification : Approx. B+
Is voltage within specifications ?
| ▶ Go to "Ground circuit inspection" procedure |
| ▶ Check for open in harness. Repair as necessary and Go to "Verification Vehicle Repair" procedure. |
Ignition "ON" & Engine "OFF".
Disconnect the "OUTPUT SPEED SENSOR" connector.
Measure resistance between terminal "1" of the OUTPUT SPEED SENSOR harness connector and chassis ground .
Specification : Approx. 0 Ω
Is resistance within specifications ?
| ▶ Go to "Component Inspection" procedure. |
| ▶ 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. |
Ignition "OFF".
Disconnect the "OUTPUT SPEED SENSOR" connector.
Measure resistance between terminal "1","2" and "2","3' and "1","3" of the "OUTPUT SPEED SENSOR" connector ..
Specification : Refer to " Reference data"
Is resistance within specifications?
Data | Reference Data | |
Current | 22 mA | |
Air Gab | Input sensor | 1.3 mm |
Output sensor | 0.85 mm | |
Resistance | 1(red) - 2(black) | Infinite |
1(black) - 2(red) | Approx. 3.89 ㏁ | |
1(red) - 3(black) | Approx. 6.55 ㏁ | |
1(black) - 3(red) | Approx. 5.27 ㏁ | |
2(red) - 3(black) | Approx. 17.5 ㏁ | |
2(black) - 3(red) | Infinite | |
| ▶ Go to "CHECK PCM/TCM " as below. |
| ▶ Replace "OUTPUT SPEED SENSOR" as necessary and Go to "Verification Vehicle Repair" procedure. |
Ignition "ON" & Engine "OFF".
Connect "OUTPUT SPEED SENSOR" connector.
Install scantool and slect a SIMU-SCAN,
Simulate frequency to OUTPUT SPEED SENSOR signal circuit.
Fig 1) OUTPUT 150Hz → 134rpm
Fig 1) OUTPUT 250Hz → 222rpm
※ The values are subject to change according to vehicle model or conditions.
Is "OUTPUT SPEED SENSOR" signal value changed according to simulation frequency?
| ▶ 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. |
| ▶ 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. |
After a repair, it is essential to verify that the fault has been corrected.
Connect scan tool and select "Diagnostic Trouble Codes(DTCs)" mode.
Using a scantool, Clear DTC.
Operate the vehicle within DTC Enable conditions in General information.
Are any DTCs present ?
| ▶ Go to the applicable troubleshooting procedure. |
| ▶ System performing to specification at this time. |
