Chrysler 300M 2002 Service Manual page 2566

P0340-CAMSHAFT POSITION SENSOR CIRCUIT —
TEST
2 Turn the ignition off.
With the DRBIII lab scope probe and the Miller special tool #6801, back probe the
Crankshaft Position (CKP) Sensor signal circuit in the CKP 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 the Crank Position Sensor.
Observe the lab scope screen.
Allow the engine to idle.
Observe the lab scope screen.
Did the CKP Sensor generate any erratic pulses?
Yes → Replace the Crankshaft Position Sensor.
→ Go To 3
No
3 Turn the ignition off.
With the DRBIII lab scope probe and the Miller special tool #6801, backprobe the
CMP Signal circuit in the CMP 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.
Allow the engine to idle.
Observe the lab scope screen.
Did the CMP Sensor generate any erratic pulses?
Yes → Replace the Camshaft Position Sensor.
→ Test Complete.
No
4 Turn the ignition off.
Disconnect the CMP Sensor harness connector.
Ignition on, engine not running.
Measure the voltage of the 5 Volt Supply circuit in the CMP Sensor harness
connector.
Is the voltage between 4.5 and 5.5 volts?
Yes → Go To 5
→ Go To 13
No
5 Turn the ignition off.
Disconnect the CMP Sensor harness connector.
Ignition on, engine not running.
Measure the voltage of the CMP Sensor Signal circuit in the CMP Sensor harness
connector.
Is the voltage between 4.5 and 5.0 volts?
Yes → Go To 6
→ Go To 8
No
ACTION
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
DRIVEABILITY - NGC
137
Continued
APPLICABILITY
All
All
All
All