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Test Description

WARNING: This page is about a different car, the 2004 Chevrolet Corvette. 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:  Listen for an audible click when the skip shift solenoid operates. Command both the ON and OFF states. Repeat the commands as necessary.
  2. 4:  Tests for voltage at the coil side of the skip shift solenoid. The ENG IGN1 fuse supplies power to the coil side of the skip shift solenoid.
  3. 5:  Verifies that the PCM is providing ground to the skip shift solenoid.
  4. 6:  Tests if ground is constantly being applied to the skip shift solenoid.
DTC P0803

Step Action Yes No
1 Did you perform the Diagnostic System Check - Engine Controls? Go to Step 2  Go to Diagnostic System Check - Engine Controls in Engine Controls - 5.7L
2 
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With a scan tool, command the skip shift solenoid ON and OFF.
Does the skip shift solenoid turn ON and OFF?		 Go to Step 3  Go to Step 4 
3
  1. Observe the Freeze Frame and/or Failure records data for this DTC.
  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 or as close to the Freeze Frame and/or Failure records data that you observed.
Does the DTC fail this ignition?		 Go to Step 4  Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
4 
  1. Turn OFF the ignition.
  2. Disconnect the skip shift solenoid.
  3. Turn ON the ignition, with the engine OFF.
  4. Probe the ignition 1 voltage circuit of the skip shift solenoid with a test lamp that is connected to a good ground.
Does the test lamp illuminate?		 Go to Step 5  Go to Step 11 
5 
  1. Connect a test lamp between the control circuit of the skip shift solenoid and the ignition 1 voltage circuit of the skip shift solenoid.
  2. With a scan tool, command the skip shift solenoid ON and OFF.
Does the test lamp turn ON and OFF?		 Go to Step 9  Go to Step 6 
6  Does the test lamp remain illuminated with each command? Go to Step 8  Go to Step 7 
7 Test the control circuit of the skip shift solenoid for a short to voltage or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 14  Go to Step 10 
8 Test the control circuit of the skip shift solenoid for a short to ground. Refer to Testing for Short to Ground and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 14  Go to Step 10 
9 Inspect for poor connections at the skip shift solenoid. 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 14  Go to Step 12 
10 Inspect for poor connections at the harness connector of the PCM. 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 14  Go to Step 13 
11 Repair the ignition 1 voltage circuit of the skip shift solenoid. Refer to Wiring Repairs in Wiring Systems.
Did you complete the repair?		 Go to Step 14  -
12 Replace the skip shift solenoid. Refer to Gear Select/Skip Shift Solenoid Replacement .
Did you complete the replacement?		 Go to Step 14  -
13 Replace the PCM. Refer to Powertrain Control Module (PCM) Replacement in Engine Controls - 5.7L.
Did you complete the replacement?		 Go to Step 14  -
14 Perform the following procedure in order to verify the repair:
  1. Select DTC.
  2. Select Clear Info.
  3. Operate the vehicle with the APP angle below 21%.
  4. Select Specific DTC.
  5. Enter DTC P0803.

Has the test run and passed?		 Go to Step 15  Go to Step 2 
15 With the scan tool, observe the stored information, capture info and DTC info.
Does the scan tool display any DTCs that you have not diagnosed?		 Go to Diagnostic Trouble Code (DTC) List in Engine Controls - 5.7L System OK
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