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Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 67 (Engine Control System - 3.8L (DTC P0418 To DTC P1115)) >> Diagnosis >> DTC P1107 >> Test Description

Test Description

WARNING: This page is about a different car, the 2005 Buick LaCrosse and 2005 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.

The number below refers to the step number on the diagnostic table.

  1. 3:  Many intermittent open or shorted circuits come and go with harness/connector movement caused by vibration, by engine torque, and by bumps. This step attempts to recreate this condition.
DTC P1107

Step Action Yes No
Schematic Reference: Engine Controls Schematics
Connector End View Reference: Powertrain Control Module (PCM) 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
2
  1. Start the engine.
  2. Monitor the DTC information with the scan tool.
Does the scan tool display DTC P0107 or P0641 set?		 Go to Diagnostic Trouble Code (DTC) List - Vehicle Go to Step 3 
3 
  1. Turn OFF the ignition.
  2. Turn ON the ignition, with the engine OFF.
  3. Observe the MAP sensor parameter with the scan tool.
  4. Attempt to induce the fault that set the DTC by manipulating the following items:
    • The manifold absolute pressure (MAP) sensor wiring harness
    • The MAP sensor connector
    • The powertrain control module (PCM) connector
Refer to Inducing Intermittent Fault Conditions and Intermittent Conditions .Is the MAP sensor voltage affected during any part of the test?		 Go to Step 4  Go to Step 8 
4 Test the 5-volt reference circuit between the PCM and the MAP sensor for an intermittent open or a high resistance. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?		 Go to Step 8  Go to Step 5 
5 Test the MAP sensor signal circuit between the PCM and the MAP sensor for the following conditions:
  • A short to ground
  • An open
  • High resistance

Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?		 Go to Step 8  Go to Step 6 
6 Test for an intermittent and for a poor connection at the MAP sensor. Refer to Testing for Continuity and Connector Repairs .
Did you find and correct the condition?		 Go to Step 8  Go to Step 7 
7 Test for an intermittent and for a poor connection at the PCM. Refer to Testing for Continuity and Connector Repairs .
Did you find and correct the condition?		 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 System OK
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