BATTERY INSPECTION [LF, L3]

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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 [LF, L3].)
Battery electrolyte gravity
1.22-1.29 [20 °C {68 °F}]

Battery voltage

1. Inspect the battery in the following procedure.

Step

Inspection

Result

Action

1
Measure open circuit voltage of battery.
More than 12.4 V
Go to Step 3.
Less than 12.4 V
Go to next step.
2
Quick-charge for 30 min and recheck voltage.
More than 12.4 V
Go to next step.
Less than 12.4 V
Replace battery.
3
Apply load current (see battery load test current) to battery using a battery load tester and record battery voltage after 15 s. Is voltage more than specification?
Yes
Battery is okay.
No
Replace battery.

Battery load test current
50D20L (40): 150 A
75D23L (52): 195 A
75D26L (52): 195 A
80D26L (55): 195 A

Battery positive voltage with load

Approximate battery temperature

Minimum voltage (V)

21 °C {70 °F}
9.6
16 °C {61 °F}
9.5
10 °C {50 °F}
9.4
4 °C {39 °F}
9.3
-1 °C {30 °F}
9.1
-7 °C {19 °F}
8.9
-12 °C {10 °F}
8.7
-18 °C {0 °F}
8.5

Back-up Current

1. Verify that the ignition switch is at 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 the current exceeds the maximum, remove the fuses in the main fuse block and the fuse block one by one while measuring the back-up current.
- Inspect and repair harnesses and connectors of the fuse at which the current decreases.
Battery back-up current
Max. 20 mA
Caution
• Operating electrical loads while measuring the back-up current is being measured can damage the circuit tester.