Captiva |
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• | 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. |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
---|---|---|---|---|
Intake Camshaft Position Sensor 5 V Reference | P0641 | P0340 | P0641 | P0341 |
Inlet Camshaft Position Sensor Low Reference | - | P0340 | - | - |
Inlet Camshaft Position Sensor Signal | P0340 | P0340 | P0340 | - |
Exhaust Camshaft Position Sensor 5 V Reference | P0641 | P0365 | P0641 | P0366 |
Exhaust Camshaft Position Sensor Low Reference | - | P0365 | - | - |
Exhaust Camshaft Position Sensor Signal | P0365 | P0365 | P0365 | - |
The 4X camshaft position sensor circuits consist of an engine control module (ECM) supplied 5 V reference circuit, low reference circuit, and an output signal circuit. The camshaft 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 4-tooth reluctor wheel attached to the camshaft. As each reluctor wheel tooth rotates past the camshaft position sensor, the resulting change in the magnetic field is used by the sensor electronics to produce a digital output pulse. The sensor returns a digital ON/OFF DC voltage pulse of varying frequency, with 4 varying width output pulses per camshaft revolution that represent an image of the camshaft reluctor wheel. The frequency of the camshaft position sensor output depends on the velocity of the camshaft. The ECM decodes the narrow and wide tooth pattern to identify camshaft position. This information is then used to determine the optimum ignition and injection points of the engine. The ECM also uses camshaft position sensor output information to determine the camshaft relative position to the crankshaft, to control camshaft phasing, and for limp-home operation.
• | DTCs P0101, P0102, P0103, P0340 and P0365 are not set. |
• | The engine is cranking or running. |
• | The mass air flow (MAF) is greater than 3 grams per s. |
• | The DTCs run continuously when the above condition is met. |
The ECM does not receive 4 camshaft pulses within 3 s.
The ECM does not receive 4 camshaft pulses within 3 s
DTC P0340, and P0365 are Type B DTCs.
DTC P0340, and P0365 are Type B DTCs.
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Control Module References for scan tool information
⇒ | If the above condition exists, repair the harness/connectors as necessary. |
⇒ | If the B23 camshaft position sensor is loose, inspect the sensor and the O-ring for damage, and replace as necessary. |
⇒ | If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K20 ECM. |
⇒ | 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 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 ECM. |
⇒ | If less than the specified range, test the affected signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K20 ECM. |
⇒ | If greater than the specified range, test the affected signal circuit for a short to voltage. If the circuit tests normal, replace the K20 ECM. |
⇒ | If the Camshaft Position Active Counter does not increment, replace the K20 ECM. |
Note: You must perform the Circuit/System Testing before proceeding with Component Testing.
⇒ | If the sensor is loose, incorrectly installed, or damaged, repair or replace the B23 camshaft position sensor. |
⇒ | If the parameter does not increment, replace the B23 camshaft position sensor. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Camshaft Position Sensor Replacement - Exhaust : LE5, LE9 or LAF |
• | Camshaft Position Sensor Replacement - Intake : LE5 , LE9, or LAF |
• | Control Module References for ECM replacement, setup, and programming |
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