Pinpoint Tests

2010 Mercury Mountaineer 2WD V8-4.6LSECTION Pinpoint Tests



Pinpoint Test





Pinpoint Test A: Battery Condition Test

Normal Operation

Battery condition is determined by measuring battery terminal voltage after a specific discharge current is applied for a specified time period.

This pinpoint test is intended to diagnose the following:
- Battery charge
- Battery



PINPOINT TEST A: BATTERY CONDITION TEST

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A1 TEST THE BATTERY CONDITION


NOTE: A red test-eye indicates the battery is discharged, not necessarily defective.

NOTE: Failure to fully charge the battery before retesting may cause false readings.

- Verify the battery condition using the Micro 490 Digital Battery Analyzer.
- Is the battery OK?

Yes
If the meter reads GOOD BATTERY, RETURN the battery to service.

If the meter reads GOOD-RECHARGE, CHARGE the battery and RETURN it to service.

If the meter reads CHARGE & RETEST, fully CHARGE and RETEST the battery.

No
If the meter reads REPLACE BATTERY, INSTALL a new battery.

If the meter reads BAD CELL-REPLACE, INSTALL a new battery.

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RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.