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Home >> Chevrolet >> 2005 >> Chevy Express H1500, Van Passenger >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 10 (Engine Control System - 4.3L (DTC P0601 To DTC P2A04)) >> Diagnosis >> DTC P0651 >> Conditions for Clearing the MIL/DTC

Conditions for Clearing the MIL/DTC

WARNING: This page is about a different variant/trim than selected.
DTC P0651

Step Action Values Yes No
Schematic Reference: Engine Controls Schematics
Connector End View Reference: Engine Controls Connector End Views or Powertrain Control Module (PCM) Connector End Views
1 Did you perform the Diagnostic System Check - Vehicle? - Go to Step 2  Go to Diagnostic System Check - Vehicle in Vehicle DTC Information
2
  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 3  Go to Intermittent Conditions
3
  1. Turn OFF the ignition.
  2. Disconnect the fuel tank pressure (FTP) sensor.
  3. Turn the ignition ON, with the engine OFF.
  4. Measure the voltage from the FTP sensor signal circuit to a good ground with the DMM.
Is the voltage less than the specified value?
0.3 V Go to Step 4  Go to Step 10 
4 Measure the voltage from the 5-volt reference circuit of the FTP sensor to a good ground with the DMM.
Is the voltage within the specified range?
4.8-5.2 V Go to Step 5  Go to Step 7 
5
  1. Select this DTC using the Specific DTC mode on the scan tool.
  2. Start the engine.
Does the scan tool indicate that the DTC failed the last test?
- Go to Step 12  Go to Step 6 
6
  1. Turn OFF the ignition.
  2. Connect the FTP sensor.
  3. Start the engine.
Does the scan tool indicate that the DTC failed the last test when the FTP is connected?
- Go to Step 11  Go to Intermittent Conditions
7 Does the voltage measure more than the specified value? 5 V Go to Step 8  Go to Step 9 
8 Test for a short to voltage on the 5-volt reference circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
- Go to Step 13  Go to Step 12 
9 Test the 5-volt reference circuit for a short to ground or any low reference circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
- Go to Step 13  Go to Step 12 
10 Repair the short to voltage in the FTP sensor signal circuit. Refer to Wiring Repairs in Wiring Systems.
Did you complete the repair?
- Go to Step 13  -
11 Replace the FTP sensor. Refer to Fuel Tank Pressure Sensor Replacement .
Did you complete the replacement?
- Go to Step 13  -
12 Replace the powertrain control module (PCM). Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.
Did you complete the replacement?
- Go to Step 13  -
13
  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 14 
14 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 in Vehicle DTC Information System OK