Subaru 2006 Legacy, Manual

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GD(H4DOTC)-155
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
BP:DTC P0500 VEHICLE SPEED SENSOR “A”
1. OUTLINE OF DIAGNOSIS
Judge as NG when outside of the possible range.
Judge as NG when the data received from the ABS control module and hydraulic control module are at er-
roneous vehicle speeds, and if the vehicle speed of the data is impossible.
2. COMPONENT DESCRIPTION
Vehicle speed signals are taken in to the ABS control module and hydraulic control unit, and normal/errone-
ous data of the ABS wheel speed sensor is received by CAN communication from the ABS control module
and hydraulic control unit.
3. ENABLE CONDITION
4. GENERAL DRIVING CYCLE
Always perform diagnosis more than 2 seconds after starting the engine.
5. DIAGNOSTIC METHOD
• Abnormality Judgment
Judge as NG when the continuous time of completing the malfunction criteria below becomes 2.5 seconds
or more.
Time Needed for Diagnosis:
2.5 seconds
Malfunction Indicator Light Illumination:
Illuminates as soon as a malfunction occurs.
• Normality Judgment
Judge as OK and clear the NG when all of the following criteria are established.
6. DTC CLEAR CONDITION
• When the OK idling cycle is completed 40 times in a row
• When “Clear Memory” is performed
7. MALFUNCTION INDICATOR LIGHT CLEAR CONDITION
• When the OK driving cycle is completed 3 times in a row
• When “Clear Memory” is performed
Secondary Parameters Enable Conditions
Battery voltage
≥
10.9 V
Elapsed time after engine starting
≥
2 sec.
Judgment Value
Malfunction Criteria Threshold Value
Front ABS wheel speed sensor status Abnormal
Either of the following is established
Front left wheel speed
≥
300 km/h (186 MPH)
Front right wheel speed
≥
300 km/h (186 MPH)
Judgment Value
Malfunction Criteria Threshold Value
Front left wheel speed > 0 km/h (0 MPH) or <
300 km/h (186 MPH)
Front right wheel speed > 0 km/h (0 MPH) or <
300 km/h (186 MPH)
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