DTC P1501 [YF (2.0L Zetec)]

id0102d0825900

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 WDS or equivalent 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 WDS or equivalent.
• 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.
No
Troubleshooting completed.