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 P0335 00: Crankshaft Position Sensor Circuit
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 | P0335 00 | P0335 00 | -- | --
Crankshaft Position Sensor Signal | P0335 00 | P0335 00 | P0335 00 | P0336 00
Low Reference | -- | P0335 00 | P0335 00 | --

### Circuit/System Description

The crankshaft position sensor circuits consist of an engine control module (ECM) supplied 5-volt reference circuit, low reference circuit, and an output signal circuit. The crankshaft position sensor is an externally magnetic biased digital output integrated circuit sensing device. The sensor provides a pulse for each magnetic pole of the magnetic encoder wheel on the crankshaft. Each pole on the encoder wheel is spaced at 60-pole spacing, with 2 missing poles for the reference gap. The crankshaft position sensor produces an ON/OFF DC voltage of varying frequency, with 58 output pulses per crankshaft revolution. The frequency of the crankshaft position sensor output depends on the velocity of the crankshaft. The crankshaft position sensor sends a digital signal, which represents an image of the crankshaft encoder wheel, to the ECM as each pole on the wheel rotates past the crankshaft position sensor. The ECM uses each crankshaft position signal pulse to determine crankshaft speed and decodes the crankshaft encoder wheel reference gap to identify crankshaft position. This information is then used to determine the optimum ignition and injection points of the engine. The ECM also uses crankshaft position sensor output information to determine the camshaft relative position to the crankshaft, to control camshaft phasing, and to detect cylinder misfire.

### Conditions for Running the DTC

• | DTC P0016 00, P0201 00, P0202 00, P0203 00, P0204 00, P0261 00, P0262 00, P0264 00, P0265 00, P0267 00, P0268 00, P0270 00, P0271 00, P0340 00, P0341 00, P0365 00, P0366 00, P0443 00, P0453 00, P0458 00 are not set

• | The engine is running.

• | The DTC runs continuously.

### Conditions for Setting the DTC

• | The engine control module detects too few or to many crankshaft pulses.

• | The crankshaft signal is not recognised.

### Action Taken When the DTC Sets

• | DTCs P0335 00 and P0336 00 are Type B DTCs.

• | Limp home mode activated.

### Conditions for Clearing the DTC

• | DTCs P0335 00 and P0336 00 are Type B DTCs.

• | With a DTC set, the engine may crank for an extended period of time at start-up.

### Diagnostic Aids

The following conditions can also set the DTC:

• | Physical damage to the crankshaft sensor or the encoder wheel

• | Worn or loose crankshaft sensor or encoder wheel

• | Improper installation of the crankshaft sensor or the encoder wheel

• | Foreign material between the crankshaft sensor and the encoder wheel

• | Gap between the crankshaft sensor and the encoder wheel is out of range

### 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 diagnostic tester information

### Circuit/System Verification

1. Ignition OFF, inspect the engine wiring harness carrying the crankshaft position sensor circuits for the following conditions:

• | Close routing of aftermarket electrical equipment

• | Close to solenoids, motors, and relays

• | If any of these are determined to be a possible source of electrical interference, correct any wiring harness routing or component placement conditions.

2. Engine idling, observe the DTC information with a scan tool. DTC P0335 00 or P0336 00 should not set.
3. Operate the vehicle within the conditions for running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the freeze frame/failure records data.

### Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the B26 Crankshaft Position (CKP) Sensor.
2. Test for less than 5 Ω between the low reference circuit terminal 2 and ground.

⇒ | If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K20 Engine Control Module (ECM).

3. Ignition ON, test for 4.8-5.2 V between the 5 V reference circuit terminal 3 and ground.

⇒ | If less than the specified range, test the 5 V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K20 Engine Control Module (ECM).

⇒ | If greater than the specified range, test the 5 V reference circuit for a short to voltage. If the circuit tests normal, replace the K20 Engine Control Module (ECM).

4. Ignition ON, test for 4.8-5.2 V between the signal circuit terminal 1 and ground.

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

⇒ | If greater than the specified range, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K20 Engine Control Module (ECM).

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

### Component Testing

#### Static Test

Inspect the B26 Crankshaft Position Sensor for looseness, damage and correct installation.

⇒ | If the B26 Crankshaft Position (CKP) Sensor is loose, incorrectly installed, or damaged, repair or replace the B26 Crankshaft Position (CKP) Sensor.

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

• | Crankshaft Position Sensor Replacement

• | Control Module References for Engine Control Module replacement, setup, and programming