Battery: Testing and Inspection

BATTERY INSPECTION

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.

Standard electrolyte gravity: 1.22 - 1.29 [20 °C (68 °F)]

Inspection and Verification
1. Verify that the customer concern by operating the system.

Visual Inspection Chart:

2. Visually inspect for obvious signs of mechanical or electrical damage.
3. If an obvious cause for a concern is found, correct the cause before proceeding to the next step.
4. If the fault is not visually evident, proceed to the pin point test.

Battery Condition Test

NOTE: Failure to fully charge the battery before retesting may cause false readings.

Pin point test
1. Verify the battery condition using the Battery Analyzer.
- If the meter read, GOOD BATTERY, inspect the generator
- If the meter read, GOOD-RECHARGE, charge the battery and inspect the generator.
- If the meter read, CHARGE & RETEST, fully charge the battery and retest.
- If the meter read, REPLACE BATTERY, install a new battery
- If the meter read, BAD CELL-REPLACE, install a new battery.

Back-up Current
1. Verify that the ignition switch is off and that the ignition switch has been removed.
2. Leave the vehicle for more than 10 min.
3. Disconnect the negative battery cable.

CAUTION: Operating electrical loads while measuring the back-up current can damage the circuit tester.

4. Measure the back-up current between the negative battery terminal and the negative battery cable.
1. If the current exceeds the maximum, remove the fuse in the main fuse block and the fuse block one by one while measuring the back-up current.
2. Inspect and repair wiring harnesses and connectors of the fuse at which the current reduces.

Maximum back-up current: 20 mA