2010 Cadillac Truck SRX FWD V6-3.0L Page 1474

2010 Cadillac Truck SRX FWD V6-3.0L Page 1474

inspect the sensor and the O-ring for damage.

瀚慖f the sensor is loose, incorrectly installed, or damaged, repair or replace the B23 crankshaft position sensor.

2. Connect the crankshaft position sensor connector to the crankshaft position sensor.

3. Ignition ON, observe the applicable camshaft position active counter parameter with a scan tool. Pass a steel object by the tip of the sensor

repeatedly. The camshaft position active counter parameter should increment.

瀚慖f the function does not perform as specified, replace the B23 camshaft position sensor.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Camshaft Position Sensor Replacement - Bank 2 (Left Side) Exhaust (See: Powertrain Management/Computers and Control

Systems/Camshaft Position Sensor/Service and Repair/Camshaft Position Sensor Replacement - Bank 2 (Left Side) Exhaust)

* Camshaft Position Sensor Replacement - Bank 2 (Left Side) Intake (See: Powertrain Management/Computers and Control

Systems/Camshaft Position Sensor/Service and Repair/Camshaft Position Sensor Replacement - Bank 2 (Left Side) Intake)

* Camshaft Position Sensor Replacement - Bank 1 (Right Side) Intake (See: Powertrain Management/Computers and Control

Systems/Camshaft Position Sensor/Service and Repair/Camshaft Position Sensor Replacement - Bank 1 (Right Side) Intake)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for K20 ECM replacement, setup, and

programming

P0366

DTC P0341, P0346, P0366, or P0391 (LF1)

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC P0341

- Intake Camshaft Position Sensor Performance Bank 1

DTC P0346

- Intake Camshaft Position Sensor Performance Bank 2

DTC P0366

- Exhaust Camshaft Position Sensor Performance Bank 1

DTC P0391

- Exhaust Camshaft Position Sensor Performance Bank 2

Diagnostic Fault Information

Circuit/System Description

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