TEST
ACTION
APPLICABILITY
7
Turn the ignition off.
Disconnect the ECM harness connectors.
Disconnect the Vehicle Speed Sensor harness connector.
Note: Check connectors - Clean/repair as necessary.
Remove the ASD/Diesel Power Relay from the PDC.
Connect a jumper wire between ASD/Diesel Power Relay cavities 30 and 87 (in PDC).
Turn the ignition on.
Measure the voltage of the Vehicle Speed Sensor Signal circuit.
Is the voltage above 5.5 volts?
All
Yes
→
Go To
8
No
→
Replace and program the Engine Control Module in accordance
with the Service Information.
Perform ROAD TEST VERIFICATION - VER-2.
8
If there are no possible causes remaining, view repair.
All
Repair
Repair the Vehicle Speed Sensor Signal circuit for a short to
voltage.
Perform ROAD TEST VERIFICATION - VER-2.
9
Turn the ignition off.
Disconnect the Vehicle Speed Sensor harness connector.
Disconnect the PCM C1 and C2 harness connectors.
Check connectors - Clean/repair as necessary
Measure the resistance between the Vehicle Speed Sensor Signal circuit and the
5-volt Supply circuit.
Is the resistance above 100 kohms?
All
Yes
→
Go To
10
No
→
Repair the Vehicle Speed Sensor Signal circuit for a short to the
5-volt Supply circuit.
Perform ROAD TEST VERIFICATION - VER-2.
10
Turn the ignition off.
Disconnect the ECM harness connectors.
Disconnect the Vehicle Speed Sensor harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance of the Vehicle Speed Sensor Signal circuit.
Is the resistance below 5.0 ohms?
All
Yes
→
Go To
11
No
→
Repair the Vehicle Speed Sensor Signal circuit for an open.
Perform ROAD TEST VERIFICATION - VER-2.
11
Turn the ignition off.
Disconnect the ECM harness connectors.
Disconnect the Vehicle Speed Sensor harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance between ground and the Vehicle Speed Sensor Signal circuit.
Is the resistance above 100 kohms?
All
Yes
→
Go To
12
No
→
Repair the Vehicle Speed Sensor Signal circuit for a short to
ground.
Perform ROAD TEST VERIFICATION - VER-2.
195
DRIVEABILITY - DIESEL
*CHECKING THE VEHICLE SPEED SIGNAL —
Continued