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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1862 (Engine Controls And Fuel - 3.5L (L66) - DTC P0223 To DTC P0499) >> DTC P0336 >> Test Description

Test Description

WARNING: This page is about a different car, the 2007 Saturn Vue. 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. 1:  The Diagnostic System Check - Vehicle prompts the technician to complete some basic checks and store the Freeze Frame data on the scan tool if applicable. This creates an electronic copy of the data taken when the fault occurred. The information is then stored in the scan tool for later reference.
  2. 2:  This step determines whether the DTC P0336 is the result of a hard failure or an intermittent condition.
  3. 6:  This step tests the CKP sensor input circuit.
  4. 14:  After replacing the PCM, a new minimum throttle position and idle speed must also be established.
DTC P0336

Step Action Values Yes No
Connector End View Reference: Powertrain Control Module 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. Select Crankshaft Position Sensor A parameter on the scan tool.
Does the scan tool display a rolling count within the specified range?		 0-3 Counts Go to Step 3  Go to Step 4 
3
  1. Observe the Freeze Frame/Failure Records for this DTC.
  2. Clear the DTCs with a scan tool.
  3. Turn OFF the ignition for 30 seconds.
  4. Start the engine.
  5. 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 In This Test
4
  1. Turn OFF the ignition.
  2. Disconnect the crankshaft position (CKP) sensor electrical connector.
  3. Connect a test lamp between the CKP sensor ground circuit and B+.
Did the test lamp illuminate?		 - Go to Step 5  Go to Step 8 
5
  1. Connect a DMM to the ignition positive voltage circuit of the CKP sensor and ground.
  2. Turn ON the ignition, with the engine OFF.
Is the voltage near the specified value?		 12 V Go to Step 6  Go to Step 9 
6 
  1. Connect the DMM to the signal circuit of CKP sensor A and ground.
  2. Turn ON the ignition, with the engine OFF.
Is the voltage near the specified value?		 5 V Go to Step 11  Go to Step 7 
7
  1. Test for an open or a short in the CKP sensor A signal circuit.
  2. Repair as necessary. Refer to Wiring Repairs .
Did you find and repair a condition?		 - Go to Step 15  Go to Step 10 
8
  1. Repair the open in the CKP sensor ground circuit.
  2. Repair as necessary. Refer to Wiring Repairs .
Did you complete the repair?		 - Go to Step 15  -
9
  1. Locate and repair the open in the ignition positive voltage circuit of the CKP sensor A.
  2. Repair as necessary. Refer to Wiring Repairs .
Did you complete the repair?		 - Go to Step 15  -
10
  1. Test for an intermittent or a poor electrical connection at the powertrain control module (PCM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
  2. Repair as necessary. Refer to Wiring Repairs .
Did you find and correct a condition?		 - Go to Step 15  Go to Step 14 
11
  1. Inspect for any of the following conditions:
    • Loose CKP sensor fasteners
    • Damaged signal marks on the crankshaft pulley
  2. Repair as necessary. Refer to Wiring Repairs .
Did you find and correct a condition?		 - Go to Step 15  Go to Step 12 
12
  1. Test for an intermittent or a poor electrical connection at the CKP sensor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
  2. Repair as necessary. Refer to Wiring Repairs .
Did you find and correct a condition?		 - Go to Step 15  Go to Step 13 
13 Replace the CKP sensor. Refer to Crankshaft Position Sensor Replacement .
Did you complete the replacement?		 - Go to Step 15  -
14 
  1. Replace the PCM. Refer to Control Module References for replacement, setup, and programming.
  2. Perform the idle learn procedure. Refer to Idle Learn .
Did you complete the replacement?		 - Go to Step 15  -
15
  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 16 
16 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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