Captiva

DTC P0335 or P0336

The crankshaft position sensor circuits consist of an engine control module (ECM) supplied 5 V reference circuit, low reference circuit, and an output signal circuit. The crankshaft position sensor is an internally magnetic biased digital output integrated circuit sensing device. The sensor detects magnetic flux changes of the teeth and slots of a 58-tooth reluctor wheel on the crankshaft. Each tooth on the reluctor wheel is spaced at 60-tooth spacing, with 2 missing teeth 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 reluctor wheel, to the ECM as each tooth 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 reluctor 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.

P0335 Condition 1

Condition 2

Condition 3

P0336 Condition 1

Condition 2

Condition 3

Condition 4

The DTCs run continuously once the above conditions are met.

P0335 Condition 1

The ECM does not detect a crankshaft position sensor pulse for greater than 4 s.

Condition 2

The ECM does not detect a crankshaft position sensor pulse for greater than 1.0 s.

Condition 3

The ECM does not detect a crankshaft position sensor pulse for 2 failures out of 10 samples.

P0336 Condition 1

The ECM detects that 20 or more crankshaft resynchronisations have occurred within 25.0 s.

Condition 2

The ECM does not detect the synchronisation gap on the reluctor wheel for greater than 0.4 s.

Condition 3

The ECM does not detect the synchronisation gap on the reluctor wheel for 1.5 s after the starter was engaged.

Condition 4

The ECM detects less than 51 or greater than 65 crankshaft position sensor pulses, during one engine revolution.

DTCs P0335 and P0336 are Type B DTCs.

DTCs P0335 and P0336 are Type B DTCs.

Schematic Reference

Engine Controls Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Electronic Ignition System Description

Electrical Information Reference

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

1. Ignition ON, observe the scan tool DTC information. DTC P0641 or P0651 should not be set.

⇒	If the DTC is set, refer to Diagnostic Trouble Code (DTC) List - Vehicle for DTC P0641 or P0651 for further diagnosis.

2. Clear the DTC information with a scan tool. Attempt to start the engine. Observe the DTC information with a scan tool. DTC P0335 or P0336 should not set.
3. Engine idling, observe the scan tool Crankshaft Position Resync Counter parameter. The parameter should always display zero. Move the related harnesses/connectors of the B26 crankshaft position sensor while observing the parameter. Verify the engine does not stumble or stall, and the parameter does not increment.
4. 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.

1. Ignition OFF, disconnect the harness connector at the B26 crankshaft position sensor.
2. Ignition OFF, all vehicle systems OFF. It may take up to 2 minutes for all systems to power down. 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.

Note: 5K Ω or greater in the 5 V reference circuit will cause this DTC to set.

3. Ignition ON, engine OFF, test for 4.8-5.2 V between the 5 V reference circuit terminal 1 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.

⇒	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.

4. Test for 4.8-5.2 V between the signal circuit terminal 3 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.

⇒	If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the K20 engine control module.

5. Ignition OFF, connect a 3 A fused jumper wire to signal circuit terminal 3.

Note: Additional DTCs may be set when performing this test.

6. Ignition ON, momentarily touch the other end of the fused jumper wire to ground repeatedly while monitoring the scan tool Crankshaft Position Sensor Active Counter parameter. The Crankshaft Position Active Counter should increment.

⇒	If the Crankshaft Position Active Counter does not increment, replace the K20 engine control module.

7. DTC P0336 should not be set.

⇒	If DTC P0336 is set, inspect the engine for the conditions listed below and repair as necessary:

•	Excessive play or looseness of the CKP sensor or the reluctor wheel

•	Improper installation of the CKP sensor

•	Foreign material passing between the CKP sensor and the reluctor wheel

•	Excessive air gap between the CKP sensor and the reluctor wheel

•	Engine oil for debris

•	Timing chain, tensioner, and sprockets for wear or damage

8. If all circuits and components test normal, test or replace the B26 crankshaft position sensor.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.