Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHRYSLER1995CIRRUS L4-148 2.4L DOHC VIN X MFIREPAIR AND DIAGNOSISA L L DIAGNOSTIC TROUBLE CODES ( DTC )TESTING AND INSPECTIONDIAGNOSTIC TROUBLE CODE DESCRIPTIONSSCAN TOOL TEXT CODESNO CRANK REFERENCE SIGNAL AT PCM
1995 Chrysler Cirrus L4-148 2.4L DOHC VIN X MFI
No Crank Reference Signal at PCM
1995 Chrysler Cirrus L4-148 2.4L DOHC VIN X MFISECTION No Crank Reference Signal at PCM
NAME OF CODE:
No Crank Reference Signal at PCM
WHEN MONITORED:
During engine cranking, with battery voltage less than 11.5 volts and manifold vacuum present.
SET CONDITION:
No signal from the crankshaft position (CKP) sensor during engine cranking or there is a camshaft position sensor signal without a CKP sensor signal.
THEORY OF OPERATION:
The crankshaft position sensor is a hall-effect type sensor used to detect the crankshaft's speed and position. The Powertrain Control Module (PCM) supplies 8 volts and a sensor ground to the CKP sensor. The crankshaft position sensor signal circuit has a 5-volt pull-up from the PCM. The sensor signal is created by the notches in the crankshaft pulse ring passing under the sensor. When a notch is under the sensor, the signal remains at 5 volts. When there isn't a notch under the sensor, the signal drops to 0.3 volt.
POSSIBLE CAUSES:
- Open or shorted 8-volt supply circuit
- Open sensor ground
- Open or shorted signal circuit
- Excessive clearance between the sensor and crankshaft pulse ring
- Damaged crankshaft pulse ring
- Failed sensor
- Failed PCM
- Connector terminals
- Connector wires
No Crank Reference Signal at PCM
WHEN MONITORED:
During engine cranking, with battery voltage less than 11.5 volts and manifold vacuum present.
SET CONDITION:
No signal from the crankshaft position (CKP) sensor during engine cranking or there is a camshaft position sensor signal without a CKP sensor signal.
THEORY OF OPERATION:
The crankshaft position sensor is a hall-effect type sensor used to detect the crankshaft's speed and position. The Powertrain Control Module (PCM) supplies 8 volts and a sensor ground to the CKP sensor. The crankshaft position sensor signal circuit has a 5-volt pull-up from the PCM. The sensor signal is created by the notches in the crankshaft pulse ring passing under the sensor. When a notch is under the sensor, the signal remains at 5 volts. When there isn't a notch under the sensor, the signal drops to 0.3 volt.
POSSIBLE CAUSES:
- Open or shorted 8-volt supply circuit
- Open sensor ground
- Open or shorted signal circuit
- Excessive clearance between the sensor and crankshaft pulse ring
- Damaged crankshaft pulse ring
- Failed sensor
- Failed PCM
- Connector terminals
- Connector wires
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.