Battery, Mounting & Cables -- Electric Ford Focus ST III

Specifications

GENERAL SPECIFICATIONS

Overview

The battery and cable system consists of the following components

1. Battery
2. Battery tray
3. High current BJB
4. Positive battery cable
5. Negative battery cable including a battery monitoring sensor

Battery and Cables

The battery is a 12V DC source connected in a negative ground system and is a voltage stabilizer for the 12V electrical system.

Note. The primary purpose of the battery eye is to be a quick indicator of the battery's state-of-charge for assembly plants and dealership pre-delivery processes.

The battery eye indicates the battery state-of-charge by responding to the specific gravity of a single battery cell electrolyte. The battery eye has a viewing plate, 2 colored balls of different specific gravity and a small passage. As the battery's state-of-charge and specific gravity changes, the balls change their position in the passageway and display a different color in the viewing eye.

Do not install a new battery based only on the battery eye color. The battery eye color simply indicates the battery state-of-charge, not its condition. For example, a red or yellow/black battery eye usually indicates the battery is discharged, not defective. If the battery eye indicates the battery may be discharged, recharge the battery before testing its condition.

1. Red - low state-of-charge
2. Yellow/Black - between high and low state-of-charge
3. Green - high state-of-charge
4. No color can occur after the battery has been in service for several years and some of the plate material has coated the balls
5. A clear battery eye can occur if the battery case becomes damaged and the electrolyte has fallen below the plates

SPECIAL TOOLS GR1 190 V3.0 Intelligent Diagnostic Charger 162-00036

Scheme 35

Battery Condition Test

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

Visual Inspection and Diagnostic Pre-checks

Diagnostics in this information assume a certain skill level and knowledge of Ford-specific diagnostic practices.

REFER to: DIAGNOSTIC METHODS (100-00 General Information, Description and Operation).

1. Inspect wiring, terminals and connectors.
2. Inspect the battery.
3. Inspect battery mounting.
4. Inspect high current BJB connections.

PINPOINT TEST A: BATTERY CONDITION TEST

1. A1 TEST THE BATTERY CONDITION NOTE: A red test-eye indicates the battery is discharged, not necessarily damaged. NOTE: Failure to fully charge the battery before retesting may cause false readings. Using the Intelligent Diagnostic Charger and the battery cables removed from the battery, verify the battery condition. Is the battery OK? Yes : RETURN the battery to service. No : If the analyzer reads REPLACE BATTERY or REPLACE-BAD CELL, INSTALL a new battery. REFER to: «Battery»(/ford/focus-st/iii-2012-2015/remont/body-electrical/#battery-mounting-cables-electric) (414-01 Battery, Mounting and Cables, Removal and Installation).

Disconnect

Note. When the battery is disconnected and connected, some abnormal drive symptoms may occur while the vehicle relearns its adaptive strategy. The vehicle may need to be driven to allow the PCM to relearn the adaptive strategy values.

Connect

1. Reverse the disconnection procedure. For vehicles with one-touch window, perform the power door window initialization. Refer to: «POWER DOOR WINDOW INITIALIZATION»(/ford/focus-st/iii-2012-2015/remont/windows/#windows-and-glass-frames-and-mechanisms-electric) (501-11).

Check

Note. No factory-equipped vehicle should have more than a 50 mA (0.050 amp) draw. Check for current drains on the battery in excess of 50 mA (0.050 amp) with all the electrical accessories off and the vehicle at rest for at least 40 minutes. Current drains can be tested with the following procedure.

Note. Many electronic modules draw 10 mA (0.010 amp) or more continuously.

Note. Typically, a drain of approximately 1 amp is attributed to an engine compartment lamp, glove compartment lamp or interior lamp staying on continually. Other component failures or wiring shorts are located by selectively pulling fuses to pinpoint the location of the current drain. When the current drain is found, the meter reading falls to an acceptable level.

Note. To accurately test the drain on a battery, an in-line ammeter must be used between the negative battery post and its respective cable. Use of a test lamp or voltmeter is not an accurate method.

Scheme 36

Scheme 37

Scheme 38

1. WARNING: Before beginning any service procedure in this information, REFER to Safety Warnings in 100-00 General Information. Failure to follow this instruction may result in serious personal injury. Refer to: «HEALTH AND SAFETY PRECAUTIONS»(/ford/focus-st/iii-2012-2015/remont/oem-general-information/#general-information-electric) (100-00 General Information, Description and Operation).
2. Refer to: «BATTERY DISCONNECT AND CONNECT»(/ford/focus-st/iii-2012-2015/remont/body-electrical/#battery-mounting-cables-electric) (414-01 Battery, Mounting and Cables, General Procedures).
3. Torque : 8 Nm

Installation

1. To install, reverse the removal procedure.

Removal

1. WARNING: Before beginning any service procedure in this information, REFER to Safety Warnings in 100-00 General Information. Failure to follow this instruction may result in serious personal injury. Refer to: «HEALTH AND SAFETY PRECAUTIONS»(/ford/focus-st/iii-2012-2015/remont/oem-general-information/#general-information-electric) (100-00 General Information, Description and Operation).
2. Refer to: «Battery»(/ford/focus-st/iii-2012-2015/remont/body-electrical/#battery-mounting-cables-electric) (414-01 Battery, Mounting and Cables, Removal and Installation).
3. Torque : 10 Nm

1. To install, reverse the removal procedure.

Scheme 39

1. WARNING: Before beginning any service procedure in this information, REFER to Safety Warnings in 100-00 General Information. Failure to follow this instruction may result in serious personal injury. Refer to: «HEALTH AND SAFETY PRECAUTIONS»(/ford/focus-st/iii-2012-2015/remont/oem-general-information/#general-information-electric) (100-00 General Information, Description and Operation).
2. Torque : 5 Nm Torque : 10 Nm Torque : 22 Nm

1. To install, reverse the removal procedure.

See also:
• DIAGNOSTIC METHODS
• POWER DOOR WINDOW INITIALIZATION
• Battery