Ford Fusion Quiz
Electrical

Battery - Diagnosis and Testing

In this manual: Electrical
General Information — 26Chassis — 150Powertrain — 282Electrical — 271Body and Paint — 300
~1min read

General Equipment

Diagnostic Charger

  1. Use Ford-approved battery test equipment.
    • Midtronics MDX-650 or P-300/P-600/490/1050
    • Midtronics GRX-3590 or 3000
    • Midtronics EXP-890

The diagnosis in this manual assumes a certain level of skill and knowledge of Ford-approved diagnostic procedures.
REFER TO: Diagnostic Methods (100-00 General Information, Description and Operation).


Ford Fusion. Battery. Diagnosis and Testing Ford Fusion. Battery. Diagnosis and Testing PINPOINT TEST A: BATTERY CONDITION TEST

Normal Operation and Fault Symptoms

Battery condition is determined by measuring the battery terminal voltage after applying a specified discharge current for a specified period of time.

Possible Sources

  • Battery
  • Wiring, Terminals or Connectors

Visual Inspection and Pre-checks

  • Inspect the wiring, terminals and connectors.
  • Inspect the battery.
  • Inspect the battery hold-down
  • Inspect the high-current connections at the BJB.
A1 CHECK BATTERY CONDITION
  • With the diagnostic charger and battery cables disconnected from the battery, check the battery condition.

Is the battery OK?
Yes RETURN the battery to service.
No If the tester shows REPLACE BATTERY or REPLACE-BAD CELL, INSTALL a new battery.
Refer to: Battery (414-01 Battery, Mounting and Cables, Removal and Installation).

Test yourself

A quick Ford Fusion quiz: every answer comes with an explanation and a link to the manual page.