Chrysler 300M 2002 Service Manual page 2562

P0339-CRANKSHAFT POSITION SENSOR INTERMITTENT —
TEST
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
→ Go To 4
No
4 Turn the ignition off.
Disconnect the CKP Sensor connector.
Ignition on, engine not running.
Measure the voltage on the 5 Volt Supply circuit.
Is the voltage between 4.5 and 5.5 volts?
Yes → Go To 5
→ Repair the open or short to ground in the 5 Volt Supply circuit.
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.
→ Go To 6
No
6 NOTE: An intermittent glitch in the Cam Position Sensor can cause the
P0339 to set.
Turn the ignition off.
With the DRBIII lab scope probe and the Miller special tool #6801, backprobe the
CMP 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.
Wiggle the related wire harness and lightly tap on the Cam Position Sensor.
Observe the lab scope screen.
Start the engine.
Observe the lab scope screen.
Are there any irregular or missing signals?
Yes → Replace the Cam Position Sensor.
→ Go To 7
No
ACTION
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Use Miller special tool #8815 when checking for an open circuit to
prevent PCM harness connector terminal damage.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
DRIVEABILITY - NGC
133
Continued
APPLICABILITY
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All
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