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Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 36 (Battery, Charging System And Starting System) >> Diagnostic Information and Procedures >> DTC P0626 >> Conditions for Clearing the MIL/DTC

Conditions for Clearing the MIL/DTC

WARNING: This page is about a different car, the 2005 Buick LaCrosse and 2005 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
DTC P0626

Step Action Values Yes No
Schematic Reference: Starting and Charging Schematics 
Connector End View Reference: Engine Control Module (ECM) Connector End Views in Engine Controls - 3.6L (LY7) or Power and Grounding Connector End Views in Wiring Systems
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. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF
  3. With a scan tool, observe the GEN-F Terminal Signal parameter in the engine control module (ECM) data list.
Does the scan tool indicate that the GEN-F Terminal parameter is within the specified range?		 0-5% Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems Go to Step 3 
3
  1. Turn OFF the ignition.
  2. Disconnect the generator harness connector.
  3. Turn ON the ignition, with the engine OFF.
  4. Connect a test lamp to battery positive voltage and repeatedly probe the generator field duty cycle signal circuit in the harness connector while monitoring the GEN-F Terminal Signal parameter on the scan tool.
Is the GEN-F Terminal Signal parameter affected?		 - Go to Step 5  Go to Step 4 
4 Test the generator field duty cycle signal circuit for a short to battery voltage. 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 
5 Inspect for poor connections at the harness connector of the generator. Refer to Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 8  Go to Charging System Test 
6 Inspect for poor connections at the harness connector of the ECM. 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 ECM must be programmed.
Replace the ECM. Refer to Control Module References in Computer/Integrating Systems 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. Use the scan tool in order to clear the DTC.
  3. Operate the vehicle within the Conditions for Running the DTC.
  4. Using the scan tool, observe the specific DTC information for DTC P0626 until the test runs.
Does the scan tool indicate that DTC P0626 failed?		 - Go to Step 2  System OK
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