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Home › Chevrolet › 2021 › Camaro LS, Automatic Trans › Repair and Diagnosis › Electrical › Charging Systems › 12 V Starting And Charging System › Diagnostic Information and Procedures › Proactive Alert Identifier SAC004 › Circuit/System Testing

Circuit/System Testing

  1. Test for the following values at each test location:
    • Test for less than the 500 mV drop between the C1 Battery Positive Post at the X50D Fuse Block - Battery and terminal A X3 at the X50D Fuse Block - Battery as the ignition is placed in the CRANK/START position.
    • Test for less than 500 mV drop between terminal A X3 at the X50D Fuse Block - Battery and terminal A X2 at the M64 Starter Motor as the ignition switch is placed in the CRANK/START position.
    • Test for less than 500 mV drop between negative battery cable and the M64 Starter Motor Case with the ignition switch in the CRANK/START position.
    • If 500 mV or greater between the C1 Battery Positive Post at the X50D Fuse Block - Battery and terminal A X3 at the X50D Fuse Block - Battery 

      Replace the X50D Fuse Block - Battery and continue testing voltage drop at all other cables.

    • If 500 mV or greater between terminal A X3 at the X50D Fuse Block - Battery and terminal A X2 at the M64 Starter Motor 

      Replace the battery starter cable between the X50D Fuse Block - Battery and M64 Starter Motor and continue testing voltage drop at all other cables.

    • If 500 mV or greater between negative battery cable and the M64 Starter Motor Case 

      Replace the Battery Negative Cable and continue testing voltage drop at all other cables.

  2. Clear the Proactive Alert Using the Scan Tool "Vehicle Diagnostics" - "Vehicle Proactive Alerts".
    • Go to next step: If all tests are less than the specific value 
  3. Replace the M64 Starter Motor.
  4. Clear the Proactive Alert Using the Scan Tool "Vehicle Diagnostics" - "Vehicle Proactive Alerts".
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