DTC P1501[AJ (3.0L Duratec)]

id0102a4825900

DTC P1501

Vehicle Speed Sensor (VSS) out of Self Test Range
DETECTION CONDITION
•  If the PCM detects a VSS input signal any time during Self Test, a DTC P1501 will be set and the test will abort.
POSSIBLE CAUSE
•  Noisy VSS input signal from Radio Frequency Interference / Electro-Magnetic Interference external sources such as ignition wire, charging circuit or after market equipment.

Diagnostic procedure

STEP

INSPECTION

ACTION
1
VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
•  Has FREEZE FRAME DATA been recorded?
Yes
Go to next step.
No
Record FREEZE FRAME DATA on repair order, then go to next step.
2
VERIFY RELATED SERVICE INFORMATION AVAILABILITY
•  Check for related Service Information availability.
•  Is any related Service Information available?
Yes
Perform repair or diagnosis according to available Service Information.
•  If vehicle is not repaired, go to next step.
No
Go to next step.
3
VERIFY PCM VSS PID FOR INPUT SIGNAL
•  Start the engine and idle in neutral.
•  Access the VSS PID with a M-MDS and observe for vehicle speed input to the PCM
•  Increase the engine speed, not greater than 2,000 rpm, several times while observing the VSS PID.
•  Is the reading on the VSS PID less than 5 km/h {3 mph}?
Yes
Go to Step 5.
No
Repair or replace the harness between PCM and VSS then go to next step.
4
INSPECT VSS
•  Inspect the VSS.
•  Is there any malfunction?
Yes
Replace VSS, then go to next step.
No
Go to next step.
5
VERIFY TROUBLESHOOTING OF DTC P1501 COMPLETED
•  Make sure to reconnect all disconnected connectors.
•  Clear DTC from memory using M-MDS.
•  Start engine.
•  Is same DTC present?
Yes
Replace PCM, then go to next step.
No
Go to next step.
6
VERIFY AFTER REPAIR PROCEDURE
•  Perform "AFTER REPAIR PROCEDURE".
•  Is there any DTC present?
Yes
Go to applicable DTC inspection.
(See DTC TABLE[AJ (3.0L Duratec)].)
No
Troubleshooting completed.