Symptom:
P0501-VEHICLE SPEED SENSOR #1 PERFORMANCE (MANUAL
TRANS)
When Monitored and Set Condition:
P0501-VEHICLE SPEED SENSOR #1 PERFORMANCE (MANUAL TRANS)
When Monitored: With the engine running. Transmission not in park or neutral. Engine
rpm greater than 1500.
Set Condition: The PCM does not receive a vehicle speed sensor signal for more than 11
seconds. 2 consecutive trips.
POSSIBLE CAUSES
VEHICLE SPEED SENSOR OPERATION
(K7) 5 VOLT SUPPLY CIRCUIT OPEN
(G7) VSS SIGNAL CIRCUIT SHORTED TO GROUND
(G7) VSS SIGNAL CIRCUIT OPEN
PCM VSS SIGNAL
(K4) SENSOR GROUND CIRCUIT OPEN
VEHICLE SPEED SENSOR
TEST ACTION APPLICABILITY
1 Raise the drive wheels off the ground.
WARNING: BE SURE TO KEEP HANDS AND FEET CLEAR OF ROTATING
WHEELS.
Start the engine.
With the DRBIIIt, monitor the Vehicle Speed Sensor
Place the transmission in any forward gear.
Allow the wheels to rotate.
Does the DRBIIIt display vehicle speed above 0 MPH/KMH?
All
Yes → Refer to the INTERMITTENT CONDITION symptom in the
Driveability category.
Perform POWERTRAIN VERIFICATION TEST VER-5-NGC.
No → Go To 2
2 Turn the ignition off.
Disconnect the Vehicle Speed Sensor harness connector.
Turn the ignition on.
Measure the voltage of the (K7) 5 Volt Supply circuit in the VSS harness connector.
Is the voltage above 4.6 volts?
All
Yes → Go To 3
No → Repair the (K7) 5 Volt Supply circuit for an open.
Perform POWERTRAIN VERIFICATION TEST VER-5-NGC.
188
DRIVEABILITY - NGC
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