Specifications

TEST ACTION APPLICABILITY
6 Turn the ignition off.
Disconnect the CKP Sensor harness connector.
Disconnect the ECM harness connectors.
Remove the Engine Control Relay.
Connect a jumper wire between cavity 30 and cavity 87 of the Engine Control Relay
connector.
Turn the ignition on.
Measure the voltage of both CKP Sensor Signal circuits.
Is the voltage below 1.0 volt for both measurements?
All
Yes → Go To 7
No → Repair the CKP Sensor Signal circuit(s) for a short to voltage.
Perform ROAD TEST VERIFICATION - VER-2.
7 Turn the ignition off.
Using the DRB lab scope, backprobe both of the CKP Sensor Signal circuits at the
ECM harness connector.
NOTE: Refer to Charts and Graphs to view a correct CKP Sensor signal.
Start the engine, if the engine will not start, crank the engine for several seconds
while monitoring the DRB.
Does the DRB display a steady clean CKP Signal pattern for both circuits?
All
Yes → Go To 8
No → Replace the Crankshaft Position Sensor.
Perform ROAD TEST VERIFICATION - VER-2.
8 Turn the ignition off.
Inspect the CKP Sensor Shield circuit.
Were any problems found?
All
Yes → Repair the Shield circuit as necessary.
Perform ROAD TEST VERIFICATION - VER-2.
No → Go To 9
9 Turn the ignition off.
Inspect the CKP Sensor for signs of damage or improper/loose attachment to the
engine.
Inspect the flywheel for excessive dirt contamination or tooth damage which can
cause improper CKP Sensor signal output.
Where any of these problems found?
All
Yes → Repair or replace as necessary.
Perform ROAD TEST VERIFICATION - VER-2.
No → Replace and program the Engine Control Module in accordance
with the Service Information.
Perform ROAD TEST VERIFICATION - VER-2.
148
DRIVEABILITY - DIESEL
P2045-CRANKSHAFT POSITION SENSOR CIRCUIT LOST SIGNAL —
Continued