LEMON Manuals: Even more car manuals for everyone
Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 177 (Instrument Panel System Displays, Gauges And Console) >> Diagnostic Information and Procedures >> DTC P0462 >> Test Description

Test Description

WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.

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 high voltage range.
DTC P0462

Step Action Values Yes No
Schematic Reference: Instrument Cluster Schematics 
Connector End View Reference: Powertrain Control Module (PCM) Connector End Views , Engine Controls Connector End Views for the 3.5L engine, Engine Controls Connector End ViewsPowertrain Control Module (PCM) Connector End Views , Engine Controls Connector End Views for the 3.9L engine and 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 ON the ignition, with the engine OFF.
  3. With a scan tool, observe the Fuel Level Sensor parameter in the engine control module (ECM)/powertrain control module (PCM) evaporative emission (EVAP) data list.
Does the scan tool indicate that the Fuel Level Sensor parameter is less than the specified value?		 0.4 V Go to Step 3  Go to Diagnostic Aids
3 
  1. Turn OFF the ignition.
  2. Disconnect C305.
  3. Turn ON the ignition, with the engine OFF.
  4. With a scan tool, observe the Fuel Level Sensor parameter.
Does the scan tool indicate that the Fuel Level Sensor parameter is greater than the specified value?		 4.5 V Go to Step 5  Go to Step 4 
4 Test the signal circuit of the fuel level sensor for a short to ground. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?		 - Go to Step 10  Go to Step 7 
5 Test the signal circuit of the fuel level sensor for a short to ground between C305 and the fuel level sensor. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?		 - Go to Step 10  Go to Step 6 
6 Inspect for poor connections at the harness connector of the fuel level sensor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
Did you find and correct the condition?		 - Go to Step 10  Go to Step 8 
7 Inspect for poor connections at the harness connector of the ECM/PCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
Did you find and correct the condition?		 - Go to Step 10  Go to Step 9 
8 Replace the fuel level sensor. Refer to Fuel Level Sensor Replacement for the 3.5L engine.
Did you complete the replacement?		 - Go to Step 10  -
9 Replace the ECM/PCM. Refer to Control Module References for replacement, setup and programming.
Did you complete the replacement?		 - Go to Step 10  -
10
  1. Use the scan tool in order to clear the DTCs.
  2. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.
Does the DTC reset?		 - Go to Step 2  System OK
scientia non olet · About LEMON Manuals