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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1164 (Engine Controls Diagnosis - 3.6L (Ly7) (DTC P0008 - DTC P0133)) >> Diagnostic Trouble Codes >> DTC P0011, P0014, P0021, or P0024 >> Test Description

Test Description

WARNING: This page is about a different car, the 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers on the diagnostic table.

  1. 2:  This step determines if there is a condition with the CMP actuator system.
  2. 6:  This step is testing the ignition 1 voltage circuit of the CMP actuator solenoid for high resistance. If the voltage at the test lamp probe is not B+, there is a high resistance condition with the circuit.
  3. 7:  This step is testing the control circuit of the CMP actuator solenoid for high resistance. If the voltage at the test lamp probe is not less than the specified voltage, there is a high resistance condition with the circuit.
  4. 11:  This step isolates the condition. If the condition follows the CMP actuator solenoid, there is a condition with the solenoid.
DTC P0011, P0014, P0021, or P0024

Step Action Values Yes No
Schematic Reference:  Engine Controls Schematics 
Connector End View Reference:  Engine Control Module (ECM) Connector End Views  or  Engine Controls Connector End Views 
1 Did you perform the Diagnostic System Check-Engine Controls? - Go to Step 2  Go to Diagnostic System Check - Engine Controls
2 
IMPORTANT: The engine oil level and the oil pressure are critical to the correct operation of the camshaft position (CMP) actuator system. Verify that the engine has the correct oil level and the correct oil pressure before continuing with this diagnostic.
Refer to Fluid and Lubricant Recommendations in Maintenance and Lubrication and Oil Pressure Diagnosis and Testing in Engine Mechanical-3.6L (LY7) for more information.
  1. Start the engine.
  2. Allow the engine to reach the normal operating temperature.
  3. Increase the engine speed to 1,500 RPM.
  4. Observe the appropriate CMP Angle parameter with a scan tool.
Is the angle at the specified value?		 0.0° Go to Step 4  Go to Step 3 
3
  1. Observe the Freeze Frame/Failure Records for this DTC.
  2. Turn OFF the ignition for 30 seconds.
  3. Start the engine.
  4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records.
Did the DTC fail this ignition?		 - Go to Step 4  Go to Diagnostic Aids
4
  1. Allow the engine to idle.
  2. Observe the DTC Information with a scan tool.
Does the scan tool display that DTC P0016, P0017, P0018, P0019, P0335, P0336, P0338, P0341, P0342, P0343, P0346, P0347, P0348, P0366, P0367, P0368, P0391, P0392, P0393, P0521, P0522, or P0523 failed this ignition?		 - Go to Diagnostic Trouble Code (DTC) List Go to Step 5 
5
  1. Turn OFF the ignition.
  2. Disconnect the CMP actuator solenoid. Refer to the appropriate procedure:
  3. Measure the resistance of the camshaft actuator solenoid with a DMM.
Is the resistance within the specified range?		 7.0-7.6 ohm Go to Step 6  Go to Step 14 
6 
  1. Turn ON the ignition, with the engine OFF.
    2. IMPORTANT: Use the J 35616-200  Test Lamp Kit for this test. If the J 35616-200  is not available, use a test lamp that measures more than 20 ohms.
  2. Connect a test lamp between the ignition 1 voltage circuit of the CMP actuator solenoid and the engine control module (ECM) housing.
  3. Measure the voltage between the probe of the test lamp and the ECM housing with a DMM. Refer to Measuring Voltage Drop in Wiring Systems.
Is the voltage at the specified value?		 B+ Go to Step 7  Go to Step 13 
7 
    IMPORTANT: Use the J 35616-200  Test Lamp Kit for this test. If the J 35616-200  is not available, use a test lamp that measures more than 20 ohms.
  1. Connect a test lamp between the control circuit of the CMP actuator and battery positive.
  2. Start the engine.
  3. Command the appropriate CMP actuator solenoid from 0 to 40 degrees with a scan tool.
    4. IMPORTANT: The voltage must be measured at the control side of the circuit.
  4. Measure the voltage between the probe of the test lamp and the ECM housing with a DMM. Refer to Measuring Voltage Drop in Wiring Systems.
  5. Observe the voltage on the DMM while the CMP actuator solenoid is commanded ON.
  6. Exit the CMP actuator solenoid output control.
  7. Turn OFF the ignition.
Is the voltage less than the specified value when commanded with a scan tool?		 1.0 V Go to Step 9  Go to Step 8 
8 Test the control circuit of the CMP actuator solenoid for high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 17  Go to Step 12 
9 Test for an intermittent and for a poor connection at the CMP actuator solenoid. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 17  Go to Step 10 
10
  1. Remove the CMP actuator solenoid.
  2. Inspect the CMP actuator solenoid and mounting area for the following conditions:
    • For a torn, restricted, mis-positioned, or missing screens at the CMP actuator solenoid
    • For engine oil leaks between the oil sealing lands of the CMP actuator solenoid-Inspect the lands of the CMP actuator solenoid for nicks.
    • For oil seepage at the CMP actuator solenoid connector
Did you find a condition with the CMP actuator solenoid?		 - Go to Step 14  Go to Step 11 
11 
  1. Swap the suspected CMP actuator solenoid with a CMP actuator solenoid that is operating correctly.
  2. Start the engine.
  3. Allow the engine to reach the normal operating temperature.
  4. Increase the engine speed to 1,500 RPM.
  5. Observe the appropriate CMP Angle parameter with a scan tool.
Is the angle at the specified value?		 0.0° Go to Step 16  Go to Step 14 
12 Test for an intermittent and for a poor connection at the ECM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 17  Go to Step 15 
13 Repair the high resistance in the ignition 1 voltage circuit of the CMP actuator solenoid. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you complete the repair?		 - Go to Step 17  -
14 Replace the CMP actuator solenoid. Refer to the appropriate procedure:
Did you complete the replacement?		 - Go to Step 17  -
15 Replace the ECM. Refer to Engine Control Module (ECM) Replacement .
Did you complete the replacement?		 - Go to Step 17  -
16 Replace the CMP actuator. Refer to the appropriate procedure:
Did you complete the replacement?		 - Go to Step 17  -
17
  1. Clear the DTCs with a scan tool.
  2. Turn OFF the ignition for 30 seconds.
  3. Start the engine.
  4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records.
Did the DTC fail this ignition?		 - Go to Step 2  Go to Step 18 
18 Observe the Capture Info with a scan tool.
Are there any DTCs that have not been diagnosed?		 - Go to Diagnostic Trouble Code (DTC) List System OK
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