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Test Description

WARNING: This page is about a different car, the 2007 Chevrolet Cobalt. 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:  The SCIP sensor 5-volt reference circuit is shared with other sensors. If DTC P0641 is set, this indicates a shorted 5-volt reference circuit or a shorted component, and should be diagnosed first.
DTC P1183

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 
  1. Turn ON the ignition, with the engine OFF.
  2. Observe the DTC Information with the scan tool.
Is DTC P0641 set?		 - Go to DTC P0641 Go to Step 3 
3 Observe the SC Inlet Pressure Sensor parameter with a scan tool.
Is the SC Inlet Pressure Sensor parameter less than the specified value?		 0.2 V Go to Step 5  Go to Step 4 
4
  1. Observe the Freeze Frame/Failure Records for this DTC.
  2. Turn OFF the ignition for 90 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 Record.
Did the DTC fail this ignition?		 - Go to Step 5  Go to Testing for Intermittent Conditions and Poor Connections
5
IMPORTANT: The connectors for the following sensors are of the same configuration but are not interchangeable.
  1. Turn OFF the ignition.
  2. Observe the engine controls schematics for the barometric pressure (BARO) sensor and for the supercharger inlet pressure (SCIP) sensor and note the circuit colors.
  3. Inspect the wiring harness of the BARO sensor for the proper connection.
  4. Inspect the wiring harness of the SCIP sensor for the proper connection.
Did you find and correct the condition?		 - Go to Step 14  Go to Step 6 
6 Test for an intermittent and for shorted terminals and for a poor connection at the SCIP sensor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
Did you find and correct the condition?		 - Go to Step 14  Go to Step 7 
7
  1. Turn ON the ignition, with the engine OFF.
  2. Measure the voltage from the 5-volt reference circuit of the SCIP sensor to a good ground with a DMM.
Is the voltage more than the specified value?		 4.80 V Go to Step 8  Go to Step 9 
8
  1. Connect a 3-amp fused jumper wire between the 5-volt reference circuit of the SCIP sensor and the signal circuit of the SCIP sensor.
  2. Observe the SC Inlet Pressure Sensor parameter with a scan tool.
Is the SC Inlet Pressure Sensor parameter more than the specified value?		 2.4 V Go to Step 12  Go to Step 10 
9 Test the SCIP sensor 5-volt reference circuit between the powertrain control module (PCM) and the SCIP sensor for a high resistance or an open. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?		 - Go to Step 14  Go to Step 11 
10 Test the SCIP sensor signal circuit between the PCM and the SCIP sensor for an open or for a short to ground. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?		 - Go to Step 14  Go to Step 11 
11 Test for an intermittent and for shorted terminals and for a poor connection at the PCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
Did you find and correct the condition?		 - Go to Step 14  Go to Step 13 
12 Replace the SCIP sensor. Refer to Manifold Absolute Pressure Sensor Replacement (SCIP) or Manifold Absolute Pressure Sensor Replacement (TMAP) .
Did you complete the replacement?		 - Go to Step 14  -
13 Replace the PCM. Refer to Control Module References for replacement, setup, and programming.
Did you complete the replacement?		 - Go to Step 14  -
14
  1. Clear the DTCs with a scan tool.
  2. Turn OFF the ignition for 90 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 15 
15 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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