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Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 153 (Engine Control System - 3.6L (Ly7) - DTC P167A To DTC P2229) >> DTC P2089, P2091, P2093 or P2095 >> Test Description

Test Description

WARNING: This page is about a different car, the 2006 Buick LaCrosse and 2006 Buick Allure. 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 the condition exists.
  2. 4:  This step verifies that the ECM is providing a ground to the CMP actuator solenoid.
DTC P2089, P2091, P2093 or P2095

Step Action 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 - Vehicle? Go to Step 2  Go to Diagnostic System Check - Vehicle in Vehicle DTC Information
2 
  1. Start the engine.
  2. Allow the engine to reach operating temperature.
  3. Observe the DTC information with a scan tool.
Does DTC P2089, DTC P2091, DTC P2093 or DTC P2095 set?		 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. Turn OFF the ignition.
  2. Disconnect the camshaft position (CMP) actuator solenoid. Refer to the appropriate procedure:
  3. Connect a test lamp between the control circuit of the CMP actuator solenoid and the ignition voltage circuit of the CMP actuator solenoid.
  4. Start the engine.
  5. Command the appropriate CMP actuator solenoid from 0 to 40 and back to 0 degrees with a scan tool.
  6. Exit the CMP Actuator Solenoid Control function.
  7. Turn OFF the ignition.
Does the test lamp turn ON when commanded to 40 degrees and OFF when commanded to 0 degrees?		 Go to Step 6  Go to Step 5 
5 Test the control circuit of the CMP actuator solenoid for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 8  Go to Step 7 
6 Replace the CMP actuator solenoid. Refer to the appropriate procedure:
Did you complete the replacement?		 Go to Step 8  -
7 Replace the engine control module (ECM). Refer to Control Module References in Computer/Integrating Systems for replacement, setup and programming.
Did you complete the replacement?		 Go to Step 8  -
8
  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 9 
9 Observe the Capture Info with a scan tool.
Are there any DTCs that have not been diagnosed?		 Go to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information System OK
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