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Home >> Pontiac >> 2007 >> Vibe Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Fuel System - DTC P0010 To DTC P0128 >> DTC P0115 >> Test Description

Test Description

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 checks for a high input condition. If the scan tool reads 140°C (284°F), the input circuit may be the result of a short circuit.
  3. 3:  This step checks for a low input condition. If the scan tool reads -40°C (-40°F), the input circuit may be the result of an open circuit.
  4. 4:  This step determines if DTC P0115 is the result of a hard failure or an intermittent condition.
DTC P0115

Step Action Values Yes No
Schematic Reference: Engine Controls Schematics
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  Select the ECT sensor parameter on the scan tool.
Is the ECT sensor value more than or equal to the specified value?		 140°C (284°F) Go to Step 5  Go to Step 3 
3  Select the ECT sensor parameter on the scan tool.
Is the ECT sensor value less than or equal to the specified value?		 -40°C (-40°F) Go to Step 7  Go to Step 4 
4 
  1. Use the scan tool in order to clear the DTCs.
  2. Turn OFF the ignition for 30 seconds.
  3. Start the engine.
  4. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.
Does the DTC run and pass?		 - Go to Step 2  Go to Diagnostic Aids
5
  1. Turn ON the ignition, with the engine OFF.
  2. Disconnect the engine coolant temperature (ECT) sensor electrical connector.
  3. Select the ECT sensor parameter on the scan tool.
Is the ECT sensor value equal to the specified value?		 -40°C (-40°F) Go to Step 13  Go to Step 6 
6
  1. Turn OFF the ignition.
  2. Disconnect the powertrain control module (PCM) electrical connector at the PCM.
  3. Check the ECT sensor input circuit for a short to ground. Ensure that the input circuit is not shorted to the sensor ground circuit.
  4. Repair as necessary. Refer to Wiring Repairs .
Was a repair necessary?		 - Go to Step 15  Go to Step 14 
7
  1. Disconnect the ECT sensor electrical connector.
  2. Jump the ECT input circuit and the sensor ground circuit together at the ECT sensor harness connector.
  3. Select the ECT sensor parameter on the scan tool.
Is the ECT sensor value more than or equal to the specified value?		 140°C (284°F) Go to Step 9  Go to Step 8 
8
  1. Jump the ECT input circuit at the ECT sensor harness connector to chassis ground.
  2. Select the ECT sensor parameter on the scan tool.
Is the ECT sensor value more than or equal to the specified value?		 140°C (284°F) Go to Step 10  Go to Step 11 
9
  1. Check for faulty electrical connections at the ECT sensor.
  2. Repair as necessary. Refer to Wiring Repairs .
Was a repair necessary?		 - Go to Step 15  Go to Step 13 
10
  1. Turn OFF the ignition.
  2. Disconnect the PCM connector at the PCM.
  3. Check the ECT sensor ground circuit for an open.
  4. Repair as necessary. Refer to Wiring Repairs .
Was a repair necessary?		 - Go to Step 15  Go to Step 12 
11
  1. Turn OFF the ignition.
  2. Disconnect the PCM connector at the PCM.
  3. Check the ECT sensor input circuit for an open.
  4. Repair as necessary. Refer to Wiring Repairs .
Was a repair necessary?		 - Go to Step 15  Go to Step 12 
12
  1. Check for a faulty ECT circuit terminal connection at the PCM.
  2. Repair as necessary.
Was a repair necessary?		 - Go to Step 15  Go to Step 14 
13 Replace the ECT sensor. Refer to Engine Coolant Temperature Sensor Replacement .
Is the action complete?		 - Go to Step 15  -
14 Replace the PCM. Refer to Control Module References for replacement, setup, and programming.
Is the action complete?		 - Go to Step 15  -
15
  1. Use the scan tool in order to clear the DTCs.
  2. Turn OFF the ignition for 30 seconds.
  3. Start the engine.
  4. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.
Does the DTC run and pass?		 - Go to Step 16  Go to Step 2 
16 With a scan tool, observe the stored information, Capture Info.
Does the scan tool display any DTCs that you have not diagnosed?		 - Go to Diagnostic Trouble Code (DTC) List - Vehicle System OK
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