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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1016 (Engine Controls Diagnosis - 4.8L, 5.3L, & 6.0L (DTCS P0449 To P2108)) >> Diagnosis >> DTC P1106 >> Test Description

Test Description

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. 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. 3:  This step attempts to pinpoint the location of the intermittent fault.
DTC P1106

Step Action Yes No
Schematic Reference: Engine Controls Schematics
Connector End View Reference: Engine Controls Connector End Views or Powertrain Control Module (PCM) 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
  1. Start the engine.
  2. Monitor the diagnostic trouble code (DTC) information with the scan tool.
Is DTC P0108 or P0641 also set?		 Go to Diagnostic Trouble Code (DTC) List Go to Step 3 
3 
  1. Observe the MAP sensor parameter with the scan tool.
  2. 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 electrical connector
    • The powertrain control module (PCM) connector
Refer to Inducing Intermittent Fault Conditions in Wiring Systems 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 low reference circuit between the PCM and the MAP sensor for an intermittent open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 8  Go to Step 5 
5
IMPORTANT: Disconnecting the PCM may eliminate the short during testing.
Test the MAP sensor signal circuit between the PCM and the MAP sensor for an intermittent 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 6 
6 Test for an intermittent and for a poor connection at the MAP sensor. 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 8  Go to Step 7 
7 Test for an intermittent and for a poor connection at the PCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you complete the action?		 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 System OK
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