For 1990-2009 cars

### 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 Descriptor

DTC P0336 00: Crankshaft Position Sensor Performance

### Diagnostic Fault Information

Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance
--- | --- | --- | --- | ---
5-Volt Reference | P0336 00 | P0336 00 | P0336 00 | P0336 00
Signal | P0336 00 | P0336 00 | P0336 00 | P0336 00

Component | Condition | DTCs
--- | --- | ---
Crankshaft sensor |

• | Improper 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

Reluctor wheel |

• | Improper installation

• | Physical damage

• | Foreign material passing between the Sensor Crankshaft and the reluctor wheel

• | looseness

P0336 00

### Typical Scan Tool Data

#### Engine Speed

Circuit | Short to Ground | Open | Short to Voltage
--- | --- | --- | ---
Operating Conditions: engine starts Parameter Normal Range: >60 RPM
5-Volt 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 AC voltage of different amplitude and frequency. The frequency depends on the velocity of the crankshaft, and the AC 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 operating.

• | The engine control module detects no or wrong signal.

• | The DTC runs continuously once the above conditions are met.

### Conditions for Setting the DTC

• | The engine is cranking or operating.

• | The engine control module detects no or wrong signal.

• | The DTC runs continuously once the above conditions are met.

### Action Taken When the DTC Sets

DTC P0336 is a Type A DTC.

### Conditions for Clearing the DTC

DTC P0336 is a Type A DTC.

### Diagnostic Aids

The following conditions may also set the DTC:

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

• | Exessive play or looseness of the crankshaft position sensor or the reluctor wheel

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

• | Exessive 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 for scan tool information

### 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 (CKP) Sensor.
2. Ignition ON, test for less than 0.3 V between the low signal circuit circuit terminal 2 (X1) and ground.

⇒ | 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 (ECM).

3. Ignition ON, test for less than 0.3 V between the high signal circuit terminal 1 (X1) and ground.

⇒ | 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 (ECM).

4. Ignition OFF, disconnect the harness connector at the K20 Engine Control Module (ECM)
5. Test for more than 500 kΩ between the low signal circuit terminal 2 (X1) and ground.

⇒ | If less than the specified range, test the low signal circuit for a short to ground. If the circuit tests normal, replace the K20 Engine Control Module (ECM).

6. Test for more than 500 kΩ between the high signal circuit terminal 1 (X1) and ground.

⇒ | If less than the specified range, test the high signal circuit for a short to ground. If the circuit tests normal, replace the K20 Engine Control Module (ECM).

7. If all circuits test normal, test or replace the B26 Crankshaft Position (CKP) Sensor.

### Component Testing

#### Staic Test

1. Ignition OFF, disconnect the harness connector at the B26 Crankshaft Position (CKP) Sensor.
2. Test for 300-700 Ω between the high signal terminal 1 and the low signal circuit terminal 2.

⇒ | If not within the specified range, replace the B26 Crankshaft Position (CKP) Sensor.

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

⇒ | If less than the specified value, replace the B26 Crankshaft Position (CKP) Sensor.

4. Set the DMM to the AC voltage scale
5. Engine cranking, test for greater than0.5 V between the high signal circuit terminal 1 and the low signal terminal 2.

⇒ | If less than the specified range, replace the B26 Crankshaft Position (CKP) Sensor.

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

• | Crankshaft Position Sensor Replacement

• | Engine Control Module Replacement for ECM replacement, setup and programming