TEST
ACTION
APPLICABILITY
6
Turn the ignition off.
Disconnect the ECM harness connectors.
Disconnect the Needle Movement Sensor harness connector.
Measure the resistance between ground and the Needle Movement Sensor Signal
circuit.
Is the resistance above 100 kohms?
All
Yes
→
Go To
7
No
→
Repair the Needle Movement Sensor Signal circuit for a short to
ground.
Perform ROAD TEST VERIFICATION - VER-2.
7
Turn the ignition off.
Replace the Needle Movement Sensor in accordance with the Service Information.
Turn the ignition on.
With the DRB, erase ECM DTCs.
Start the engine and vary the engine speed from idle to 3500 RPM several times.
With the DRB, read ECM DTCs.
Did this DTC reset?
All
Yes
→
Replace and program the Engine Control Module in accordance
with the Service Information.
Perform ROAD TEST VERIFICATION - VER-2.
No
→
The repair is complete.
Perform ROAD TEST VERIFICATION - VER-2.
8
WARNING: KEEP CLEAR OF THE ENGINE’S MOVING PARTS.
NOTE: The conditions that set the DTC are not present at this time. The
following list may help in identifying the intermittent condition.
With the engine running at normal operating temperature, monitor the DRB
parameters related to the DTC while wiggling the wiring harness. Look for param-
eter values to change and/or a DTC to set.
Review the DTC When Monitored and Set Conditions. If possible, try to duplicate the
conditions under which the DTC was set.
Refer to any Technical Service Bulletins (TSB) that may apply.
Visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or
partially broken wires.
Visually inspect the related wiring harness connectors. Look for broken, bent, pushed
out, or corroded terminals.
Were any of the above conditions present?
All
Yes
→
Repair as necessary
Perform ROAD TEST VERIFICATION - VER-2.
No
→
Test Complete.
164
DRIVEABILITY - DIESEL
P1725-INDUCTIVE AUX. SPEED SENSOR DYN. PLAUSIBILITY —
Continued