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Home >> Pontiac >> 2005 >> Grand Prix GTP >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel System Displays, Gauges And Console >> Diagnostic Information and Procedures >> DTC P0523 >> Test Description

Test Description

The number below refers to the step number on the diagnostic table.

  1. 3:  This step tests for the proper operation of the circuit in the low voltage range.
DTC P0523

Step Action Values Yes No
Schematic Reference: Instrument Cluster Schematics 
Connector End View Reference: ENGINE CONTROLS CONNECTOR END VIEWS in Engine Controls - 5.3 L or to Inline Harness Connector End Views
1 Did you perform the Diagnostic System Check - Vehicle? - Go to Step 2  Go to Diagnostic System Check - Vehicle
2
  1. Install a scan tool.
  2. Turn the ignition ON, with the engine OFF.
  3. With the scan tool, observe the Engine Oil Pressure Sensor parameter in the ECM IPC Data List.
Does the Engine Oil Pressure Sensor parameter display greater than the specified value?		 4.6 V Go to Step 3  Go to Diagnostic Aids
3 
  1. Turn the ignition OFF.
  2. Disconnect the engine oil pressure (EOP) sensor.
  3. With the scan tool, observe the Engine Oil Pressure Sensor parameter in the ECM IPC Data List.
Does the Engine Oil Pressure Sensor parameter display less than the specified value?		 0.4 V Go to Step 4  Go to Step 5 
4
  1. Turn the ignition OFF.
  2. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure (RPOs L26/L32) or Battery Negative Cable Disconnect/Connect Procedure (RPO LS4) .
  3. Measure the resistance from the low reference circuit of the EOP sensor to a good ground.
Is the resistance less than the specified value?		 5 Ω Go to Step 7  Go to Step 6 
5 Test the EOP sensor signal circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?		 - Go to Step 11  Go to Step 8 
6
  1. Disconnect the ECM.
  2. Test the low reference circuit of the EOP sensor for an open or for a high resistance. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?		 - Go to Step 11  Go to Step 8 
7 Inspect for poor connections at the harness connector of the EOP sensor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
Did you find and correct the condition?		 - Go to Step 11  Go to Step 9 
8 Inspect for poor connections at the harness connector of the ECM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
Did you find and correct the condition?		 - Go to Step 11  Go to Step 10 
9 Replace the EOP sensor. Refer to Engine Oil Pressure Sensor and/or Switch Replacement .
Did you complete the replacement?		 - Go to Step 11  -
10 Replace the ECM. Refer to Control Module References for replacement, setup, and programming.
Did you complete the replacement?		 - Go to Step 11  -
11
  1. Use the scan tool in order to clear the DTCs.
  2. Operate the vehicle within the Conditions for Running the DTC.
Does the DTC reset?		 - Go to Step 2  System OK
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