TEST
ACTION
APPLICABILITY
8
Turn the ignition off.
Disconnect the ECM harness connectors.
Disconnect the PCM harness connectors.
Disconnect the Vehicle Speed Sensor harness connector.
Measure the resistance between ground and Vehicle Speed Sensor harness connector
cavities 1, 2, and 3.
Is the resistance above 100 kohms on each circuit?
All
Yes
→
Go To
9
No
→
Repair the circuit that measured below 100 kohms for a short to
ground.
Perform ROAD TEST VERIFICATION - VER-2.
9
Turn the ignition off.
Disconnect the ECM harness connectors.
Disconnect the PCM harness connectors.
Disconnect the Vehicle Speed Sensor harness connector.
Measure the resistance between VSS harness connector cavity 1 and cavities 2 and
3, then between cavity 2 and 3.
Is the resistance above 100 kohms for each measurement?
All
Yes
→
Go To
10
No
→
Repair the circuit that measured below 100 kohms for a short
together.
Perform ROAD TEST VERIFICATION - VER-2.
10
Turn the ignition off.
Disconnect the PCM harness connectors.
Disconnect the Vehicle Speed Sensor harness connector.
Measure the resistance of the Vehicle Speed Sensor Signal circuit.
Measure the resistance of the Vehicle Speed Sensor Ground circuit.
Is the resistance below 5.0 ohms for each measurement?
All
Yes
→
Go To
11
No
→
Repair the circuit that measured above 5.0 ohms for an open.
Perform ROAD TEST VERIFICATION - VER-2.
11
If there are no possible causes remaining, view repair.
All
Yes
→
Replace the Vehicle Speed Sensor.
Perform ROAD TEST VERIFICATION - VER-2.
12
Turn the ignition off.
Disconnect the Vehicle Speed Sensor harness connector.
Disconnect the PCM C2 harness connector.
Check connectors - Clean/repair as necessary
Measure the resistance of the 5-volt Supply circuit between the Vehicle Speed Sensor
harness connector and the PCM C2 harness connector.
Is the resistance below 5.0 ohms?
All
Yes
→
Replace and program the Powertrain Control Module in accor-
dance with the Service Information.
Perform ROAD TEST VERIFICATION - VER-2.
No
→
Repair the 5-volt Supply circuit for an open.
Perform ROAD TEST VERIFICATION - VER-2.
187
DRIVEABILITY - DIESEL
*CHECKING THE SPEEDOMETER OPERATION —
Continued