Dodge 2004 Neon SX2 Diagnostic Manual page 477

P0339-CRANKSHAFT POSITION SENSOR INTERMITTENT —
TEST
2 With the DRBIII , read and record Freeze Frame Data specific to the CKP signal,
ECT, RPM, Sync state, vehicle speed, etc.
Turn the ignition off.
With the DRBIII lab scope probe and the Miller special tool #6801, backprobe the
(K24) CKP Signal circuit at the Sensor harness connector.
WARNING: WHEN THE ENGINE IS OPERATING, DO NOT STAND IN A
DIRECT LINE WITH THE FAN. DO NOT PUT YOUR HANDS NEAR THE
PULLEYS, BELTS OR FAN. DO NOT WEAR LOOSE CLOTHING.
Ignition on, engine not running.
Observe the lab scope screen at least 1 minute and then start the vehicle.
Continue observing the lab scope screen for an additional minute.
Were there any irregular or missing signals?
Yes → Go To 3
No
3 Visually inspect the related wire harness including the ground circuit. Look for any
chafed, pierced, pinched, or partially broken wires.
Visually inspect the related wire harness connectors. Look for broken, bent, pushed
out, or corroded terminals.
Ensure the Crankshaft Position Sensor and the Camshaft Position Sensor are
properly installed and the mounting bolt(s) are tight.
Refer to any TSBs that may apply.
Were any of the above conditions present?
Yes → Repair as necessary
No
4 Turn the ignition off.
Disconnect the CKP Sensor connector.
Ignition on, engine not running.
Measure the voltage on the (K7) 5 Volt Supply circuit.
Is the voltage between 4.5 and 5.5 volts?
Yes → Go To 5
No
5 Turn the ignition off.
Carefully disconnect the Battery (-) Ground cable.
Remove the Crankshaft Position Sensor.
Inspect the Tone Wheel/Flex Plate slots for damage, foreign material, or excessive
movement.
Were any problems found?
Yes → Repair or replace the Tone Wheel/Flex Plate as necessary.
No
ACTION
→ Go To 8
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
→ Go To 4
→ Repair the open or short to ground in the (K7) 5 Volt Supply
circuit. Use Miller special tool #8815 when checking for an open
circuit to prevent PCM harness connector terminal damage.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
→ Go To 6
DRIVEABILITY - NGC
141
Continued
APPLICABILITY
All
All
All
All