Circuit/System Testing

Test for the following values at each test location:
- Test for less than the 500 mV drop between the C1 Battery Positive Post and the X50D Fuse Block - Battery with the ignition in CRANK/START.
- Test for less than the 500 mV drop between the C1 Battery Positive Post and the X50D Fuse Block - Battery with the ignition in CRANK/START.
- Test for less than the 500 mV drop between the X50D Fuse Block - Battery and terminal A X2 at the M64 Starter Motor with the ignition in CRANK/START.
- Test for less than 500 mV drop between negative battery cable and the M64 Starter Motor Case with the ignition in CRANK/START.
- If 500 mV or greater between the C1 Battery Positive Post and the X50D Fuse Block - Battery
  (KL9) Replace the X50D Fuse Block - Battery and continue testing voltage drop at all other cables.
- If 500 mV or greater between the X50D Fuse Block - Battery and terminal A X2 at the M64 Starter Motor
  Replace the Starter Solenoid Cable 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.
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
Refer to Battery Inspection/Test
- If Battery Fails the Test
  Replace the C1 battery.
Clear the Proactive Alert Using the Scan Tool "Vehicle Diagnostics" - "Vehicle Proactive Alerts".
- Go to next step: If the Battery Passes the Test
Replace the M64 Starter Motor.
Clear the Proactive Alert Using the Scan Tool "Vehicle Diagnostics" - "Vehicle Proactive Alerts".