Chrysler PT Cruiser 2001 Service Manual Supplement page 2564

DRIVEABILITY - GAS
Symptom:
P0320-NO CRANK REFERENCE SIGNAL AT PCM
When Monitored and Set Condition:
P0320-NO CRANK REFERENCE SIGNAL AT PCM
When Monitored: With the ignition in either the start or run position and battery voltage
between 4-15 volts.
Set Condition: No signal from the crankshaft position sensor is present when engine
vacuum is present or cam signals are present.
CKP SIGNAL CIRCUIT SHORTED TO VOLTAGE
8 VOLT SUPPLY CIRCUIT OPEN
8 VOLT SUPPLY CIRCUIT SHORTED TO GROUND
8 VOLT SUPPLY CIRCUIT SHORTED TO CKP SIGNAL CIRCUIT
PCM (8 VOLT SUPPLY)
SENSOR GROUND CIRCUIT OPEN
CKP SIGNAL CIRCUIT
IRREGULAR LAB SCOPE PATTERN OF CKP SIGNAL
STRAY SIGNAL FROM THE CAMSHAFT POSITION SENSOR
WIRING HARNESS INTERMITTENT
CKP SIGNAL CIRCUIT SHORTED TO GROUND
CKP SIGNAL CIRCUIT OPEN
CKP SIGNAL CIRCUIT SHORTED TO SENSOR GROUND CIRCUIT
POWERTRAIN CONTROL MODULE (CKP SIGNAL CIRCUIT)
TEST
1 With the DRB, monitor the Current CKP Count while cranking the engine.
Does the Current CKP Count change while cranking the engine?
→ Go To 2
No
Yes → Go To 13
2 Turn the ignition off.
Disconnect the Crankshaft Position Sensor harness connector.
Turn the ignition on.
Measure the voltage of the 8 volt supply circuit at the CKP sensor harness connector.
Is the voltage above 7.5 volts?
Yes → Go To 3
→ Go To 9
No
POSSIBLE CAUSES
ACTION
104
APPLICABILITY
All
All