Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the B23 camshaft position sensor.
2. Ignition OFF and all vehicle systems OFF, it may take 2 minutes for all vehicle systems to power down, test for less than 1 ohm on the
camshaft position low reference circuit, terminal B, and ground.
锟斤拷If greater than the specified value, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K20
ECM.
3. Ignition ON, test for 4.8-5.2 V between the camshaft position 5 V reference circuit terminal A and ground.
锟斤拷If less than the specified range, test the 5 V reference circuit for an open/high resistance or short to ground. If the circuit tests normal,
replace the K20 ECM.
锟斤拷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.
4. Ignition ON, test for 4.8-5.2 V between the camshaft position signal circuit terminal C and ground.
锟斤拷If less than the specified range, test the signal circuit for an open/high resistance or short to ground. If the circuit tests normal, replace the
K20 ECM.
锟斤拷If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the K20 ECM.
5. Ignition OFF, connect a fused jumper wire to the camshaft position signal circuit terminal C.
6. Ignition ON, momentarily touch the other the other end of the fused jumper wire to the battery negative post. The scan tool should show the
Camshaft Position Active counter incrementing.
锟斤拷If the Camshaft Position Active counter increments, test or replace the B23 camshaft position sensor.
锟斤拷If the Camshaft Position Active counter does not increment, replace the K20 ECM.
Component Testing
Note: You must perform the Circuit/System Testing before proceeding with Component Testing.
1. Inspect the camshaft position sensor for correct installation. Remove the camshaft position sensor from the engine and inspect the sensor
O-ring for damage.
锟斤拷If the sensor is loose, incorrectly installed, or damaged, replace the B23 camshaft position sensor.
2. Connect the camshaft position sensor harness connector to the B23 camshaft position sensor.
3. Ignition ON, engine OFF. Observe the Camshaft Position Active counter parameter on the scan tool.
4. Pass a flat steel object across the tip of the sensor repeatedly. The Camshaft Position Active counter parameter should increment with each
pass of the steel object.
锟斤拷If the parameter does not increment, 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 (See: Powertrain Management/Computers and Control Systems/Camshaft Position Sensor/Service
and Repair)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM replacement, setup, and programming
P0341
DTC P0341
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.
