Ford Fiesta Quiz
Battery and Charging System

Battery - Diagnosis and Testing

In this manual: Battery and Charging System
Service Information — 27Suspension — 48Transmission — 9Brake System — 52Steering — 21Engine — 140Manual Transmission, Clutch, Transfer Case and Power Transfer Unit — 48Exhaust System — 6Fuel System — 21Climate Control System — 58Instrumentation and Warning Systems — 26Battery and Charging System — 20Infotainment Systems — 41Lighting — 29Power Distribution — 11Electronic Function Group — 30Body and Paint — 275Frame and Mounting — 3
~1min read

General Equipment

Diagnostic Charger

Battery Condition Test

Battery condition is determined by measuring the voltage at the battery terminals after a specified discharge current is applied for a specified period of time.

Visual Inspection and Preliminary Diagnosis

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).

  • Inspect the wiring, terminals and connectors.
  • Inspect the battery.
  • Inspect the battery hold-down.
  • Inspect the high-current connections at the BJB.
  1. Use Ford-approved battery test equipment.
    • Midtronics MDX-650 or P-300/P-600/490/1050
    • Midtronics GRX-3590 or 3000

PINPOINT TEST A: BATTERY CONDITION TEST
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 Fiesta quiz: every answer comes with an explanation and a link to the manual page.