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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1812 (Battery, Charging System And 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 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
DTC P0622

Step Action Value(s) Yes No
Connector End View Reference: Engine Electrical Connector End Views  or Powertrain Control Module 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. 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 signal parameter change?		 - Go to Testing for Intermittent Conditions and Poor Connections Go to Step 4 
4
  1. Turn OFF the ignition.
  2. Disconnect the generator harness 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 .
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 .
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 Control Module References for replacement, setup, and programming.Did you complete the replacement?		 - Go to Step 8  -
8
  1. Review and record the scan tool Failure Records data.
  2. Clear any DTCs.
  3. Operate the vehicle within the Failure 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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