Battery Testing Procedure
- STEP 1. Check the battery cables.
- Remove the negative cable, then the positive cable.
- Check for dirty or corroded connections.
Q: Are the battery cables dirty or have corroded connections?
YES : Clean the battery cables. Then go to Step 2.
NO : Go to Step 2.
- STEP 2. Check the battery posts.
Check for loose battery post.
Q: Are the battery posts loose?
Yes : Replace the battery.
NO : Go to Step 3.
- STEP 3. Check the battery case and cover.
- Remove the hold-downs and shields.
- Check for broken/cracked case or cover.
Q: Is the battery case or cover faulty?
YES : Replace the battery.
NO : Go to Step 4.
- STEP 4. Check the open circuit voltage.
- Turn headlights on for 15 seconds.
- Turn headlights off for two minutes to allow battery positive voltage to stabilize.
- Disconnect the battery cables.
- Read open circuit voltage.
Q: Is open circuit voltage 12.4 volts or more?
YES : Go to Step 6.
NO : Go to Step 5.
- STEP 5. Battery charging
Charge the battery. (See CHARGE RATE CHART BATTERY CHARGING )
Q: Is open circuit voltage 12.4 volts or more?
YES : Go to Step 6.
NO : Replace the battery.
- STEP 6. Check the load test.
- Connect a load tester to the battery.
- Load the battery at the recommended discharge rate (See LOAD TEST RATE CHART) for 15 seconds.
- Read voltage after 15 seconds, then remove load.
- Compare the measured value with the minimum voltage. (See LOAD TEST CHART.)
Q: Is the voltage higher than minimum voltage?
YES : The battery is normal.
NO : Replace the battery.
LOAD TEST RATE DESCRIPTION
| Battery | Load test | Cranking ratio [-18°C (0°F)] | Reserve capacity |
|---|---|---|---|
| 55D23L | 170 amps | 356 amps | 99 minutes |
LOAD TEST DESCRIPTION
| Temperature °C (°F) | 21 (70) AND ABOVE | 16 (61) to 20 (68) | 10 (50) to 15 (59) | 4 (40) to 9 (48) | -1 (31) to 3 (37) | -7 (20) to -2 (28) | -12 (11) to -8 (17) | -18 (0) to -13 (8) |
|---|---|---|---|---|---|---|---|---|
| Minimum voltage | 9.6 | 9.5 | 9.4 | 9.3 | 9.1 | 8.9 | 8.7 | 8.5 |