Diagnostic Instructions

•	Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

•	Review Strategy Based Diagnosis for an overview of the diagnostic approach.

•	Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC P1325 01

Crankshaft Position Reluctor Wheel Performance

DTC P1325 02

Crankshaft Position Reluctor Wheel Performance

DTC P1325 03

Crankshaft Position Reluctor Wheel Performance

DTC P1325 04

Crankshaft Position Reluctor Wheel Performance

Diagnostic Fault Information

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
5V Reference	P0336 00	P0336 00	P0336 00	P0336 00, P1325
Signal	P0336 00	P0336 00	P0336 00	P0336 00, P1325

Component	Condition	DTCs
Crankshaft Position Sensor	• Incorrect installation • Physical damage • Foreign material passing between the Sensor Crankshaft and the reluctor wheel • Looseness • Gap between the Sensor Crankshaft and the reluctor wheel is out of range	P0336 00, P1325
Reluctor Wheel	• Incorrect installation • Physical damage • Foreign material passing between the Sensor Crankshaft and the reluctor wheel • Looseness	P0336 00, P1325

Typical Scan Tool Data

Engine Speed

Circuit	Short to Ground	Open	Short to Voltage
Operating Conditions: Engine Starts Parameter Normal Range: >60 RPM
5V Reference	0 RPM	0 RPM	0 RPM
Signal	0 RPM	0 RPM	0 RPM

Circuit/System Description

The crankshaft position sensor signal indicates the crankshaft speed and position. The crankshaft position sensor produces an alternating current voltage of different amplitude and frequency. The frequency depends on the velocity of the crankshaft, and the alternating current voltage output depends on the crankshaft position and battery voltage. The engine control module (ECM) can synchronize the ignition timing, fuel injector timing based on the crankshaft position sensor and the camshaft position sensor inputs. The sensor crankshaft position sensor is also used to detect misfire and tachometer display. The crankshaft position sensor circuits are connected directly to the ECM.

Conditions for Running the DTC

•	The engine is cranking or running.

•	The engine control module detects no or wrong signal.

•	The DTC runs continuously when the above conditions are met.

Conditions for Setting the DTC

•	The engine is cranking or running.

•	The engine control module detects no or wrong signal.

•	The DTC runs continuously when the above conditions are met.

Action Taken When the DTC Sets

DTC 1325 is a Type A DTC.

Conditions for Clearing the DTC

DTC 1325 is a Type A DTC.

Diagnostic Aids

The following conditions can also set the DTC:

•	Physical damage to the crankshaft position sensor or the reluctor wheel

•	Excessive play or looseness of the crankshaft position sensor or the reluctor wheel

•	Improper installation of the crankshaft position sensor or the reluctor wheel

•	Excessive air gap between crankshaft position sensor and the reluctor wheel

Reference Information

Schematic Reference

Engine Controls Schematics

Connector End View Reference

Component Connector End Views

Electrical Information Reference

•	Circuit Testing

•	Connector Repairs

•	Testing for Intermittent Conditions and Poor Connections

•	Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References

Circuit/System Verification

Engine starting or running, observe the scan tool Engine Speed parameter. The reading should be between 50-850 RPM.

Circuit/System Testing

1.	Ignition OFF, disconnect the harness connector at the B26 Crankshaft Position Sensor.

2.	Ignition ON, test for 2.0-3.0 V between the low signal circuit terminal 2 and ground.

3.	If greater than the specified range, test the low signal circuit for a short to voltage. If the circuit tests normal, replace the K20 Engine Control Module.

4.	If less than the specified range, test the low signal circuit for a short to ground or an open/high resistant. If the circuit tests normal, replace the K20 Engine Control Module.

5.	Ignition ON, test for 2.0-3.0 V between the high signal circuit terminal 1 and ground.

6.	If greater than the specified range, test the high signal circuit for a short to voltage. If the circuit tests normal, replace the K20 Engine Control Module.

7.	If less than the specified range, test the high signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K20 Engine Control Module.

8.	If all circuits test normal, test or replace the B26 Crankshaft Position Sensor.

Component Testing

Static Test

1.	Ignition OFF, disconnect the harness connector at the B26 Crankshaft Position Sensor.

2.	Test for 700-800 Ω between the high signal terminal 1 and the low signal circuit terminal 2.

3.	If not within the specified range, replace the B26 Crankshaft Position Sensor.

4.	Test for infinite resistance between each terminal and the sensor housing/case.

5.	If less than the specified value, replace the B26 Crankshaft Position Sensor.

6.	Engine cranking, test for greater than 0.5 V alternating current between the high signal circuit terminal 1 and the low signal terminal 2.

7.	If less than the specified range, replace the B26 Crankshaft Position Sensor.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

•	Crankshaft Position Sensor Replacement

•	Engine Control Module Replacement