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Home >> Chevrolet >> 2001 >> Venture Base, Van Passenger >> Repair and Diagnosis >> External Pages >> Different car >> Section 800 (Battery, Charging System & Starting System) >> Diagnostic Information and Procedures >> DTC P0622 >> Conditions for Clearing the MIL/DTC

Conditions for Clearing the MIL/DTC

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.
DTC P0622

Step Action Values Yes No
Schematic Reference: Starting and Charging Schematics 
Connector End View Reference: Engine Electrical Connector End Views 
1 Did you perform the Engine Electrical Diagnostic System Check? - Go to Step 2  Go to Diagnostic System Check - Engine Electrical 
2
  1. Install a scan tool.
  2. Start the engine.
  3. With a scan tool, observe the GEN - F Terminal parameter in the powertrain control module (PCM) data list.
Does the scan tool indicate that the GEN - F Terminal parameter is within the specified range?		 5-95% Go to Step 3  Go to Step 4 
3 With the scan tool command the generator OFF.
Does the GEN - F Terminal equal the specified value?		 0% Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems Go to Step 4 
4
  1. Turn OFF the ignition.
  2. Disconnect the generator connector.
  3. Connect test lamp to battery positive voltage.
  4. Turn ON the ignition, with the engine OFF.
  5. Probe the F-Terminal in the generator connector.
  6. Observe the GEN - F Terminal Signal parameter in the PCM data list.
Is the GEN - F Terminal Signal parameter near the specified value?		 100% Go to Charging System Test  Go to Step 5 
5 Test the generator field duty cycle signal circuit for a short or open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 8  Go to Step 6 
6 Inspect for poor connections at the harness connector of the PCM. Refer to Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 8  Go to Step 7 
7
IMPORTANT: The replacement PCM must be programmed.
Replace the PCM. Refer to Powertrain Control Module (PCM) Replacement in Engine Controls - 5.7L.Did you complete the repair?		 - Go to Step 8  -
8
  1. Review and record the scan tool Fail Records data.
  2. Clear any DTCs.
  3. Operate the vehicle within the Fail Records conditions as noted.
  4. Using a scan tool, monitor the Specific DTC info for this DTC.
Does the scan tool indicate that this DTC failed this ignition?		 - Go to Step 2  System OK
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