BATTERY INSPECTION [L3, AJ (3.0L Duratec)]

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Warning
• Since battery acid is toxic, be careful when handling the battery.
• Since battery acid is highly corrosive, be careful not to allow it to contact clothing or the vehicle.
• In case battery acid contacts skin, eyes, or clothing, flush it immediately with running water. Especially if the acid gets in the eyes, flush with water for more than 15 min and get prompt medical attention.

Electrolyte Gravity

1. Measure the electrolyte gravity using a hydrometer.

• If it is less than the specification, recharge the battery. (See BATTERY RECHARGING [L3, AJ (3.0L Duratec)].)
Standard
1.22-1.29 [20 °C {68 °F}]

Battery voltage

1. Inspect the battery as follows:

STEP

INSPECTION

ACTION

1
Measure the battery positive voltage.
12.4 V or more
Go to Step 3.
Less than 12.4 V
Go to the next step.
2
Quick-charge for 30 min and recheck voltage.
12.4 V or more
Go to the next step.
Less than 12.4 V
Replace the battery.
3
• Apply load current (see load test chart) to battery using a battery load tester and measure battery voltage after 15 s. Is the voltage more than the specification? (See battery positive voltage with load.)
Yes
Normal
No
Replace the battery.

Test load chart

Battery

Current load (A)

55D23L
180
80D26L
195
GROUP 40R
240

Standard

Battery temp. (°C {°F})

Minimum voltage (V)

21 {70}
9.6
15 {59}
9.5
10 {50}
9.4
4 {39}
9.3
-1 {30}
9.1
-7 {19}
8.9
-12 {10}
8.7
-18 {0}
8.5

Back-up Current

1.• Verify that the ignition switch is off and that the key has been removed.

2. Disconnect the negative battery cable.

3. Measure the back-up current between the negative battery terminal and the negative battery cable.

• If it is not within the specification, remove the fuses one by one from the inside of the main fuse block and the inside of the fuse block while measuring the back-up current.
Caution
• Operating electrical loads while the back-up current is being measured can damage the tester.
Standard
20 mA or less

4. Inspect and repair wiring harnesses and connectors of the fuse where the current decreased.