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Home >> Chevrolet >> 2004 >> Epica LS >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel, Gages, And Console >> Diagnostic Information and Procedures >> DTC P0462 (2.0L - L34 GMDAT) >> Test Description

Test Description

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

  1. 2:  This step determines if the fault is present.
Step Action Value Yes No
Schematic Reference:  Instrument Cluster Schematics  
Connector End View Reference:  Instrument Panel, Gages, and Console Connector End Views  
1 Did you perform the Diagnostic System Check - in Instrument Cluster? - Go to Step 2  Go to Diagnostic System Check - Instrument Cluster 
2 
  1. Turn ON the ignition, with the engine OFF.
  2. Observe the Fuel Level Sensor voltage parameter with a scan tool.
Is the voltage more than the specified value?		 4.25 Go to Step 4  Go to Step 3 
3
  1. Observe the Freeze Frame/Failure Records 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. 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
4
  1. Turn OFF the ignition.
  2. Disconnect the fuel level sensor through the access panel under the rear seat.
  3. Turn ON the ignition, with the engine OFF.
  4. Observe the Fuel Tank Level voltage parameter with a scan tool.
Is the voltage less than the specified value?		 4.25 Go to Step 6  Go to Step 5 
5 Test the signal circuit of the fuel level sender for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 10  Go to Step 7 
6 Test for shorted terminals and poor connections at the fuel level sensor. 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 10  Go to Step 8 
7 Test for shorted terminals and poor connections at the ECM. 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 10  Go to Step 9 
8 Replace the fuel level sender assembly. Refer to Fuel Sender Assembly Replacement n Engine Controls - 2.0L (L34).
Did you complete the replacement?		 - Go to Step 10  -
9 Replace the control module. Refer to Engine Control Module (ECM) Replacement (Non European Emissions) or Engine Control Module (ECM) Replacement (European Emissions) in Engine Controls - 2.0L (L34).
Did you complete the replacement?		 - Go to Step 10  -
10
  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 11 
11 Observe the Capture Info with a scan tool.
Are there any DTCs that have not been diagnosed?		 - Go to Diagnostic Trouble Code (DTC) List in Engine Controls - 2.0L (L34) System OK
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