Battery Test

NOTE: Perform PRELIMINARY CHECKS under TROUBLE SHOOTING before proceeding. If battery shows signs of freezing or leakage, battery posts are loose or battery has low electrolyte level, DO NOT test.

If battery has a built-in hydrometer, go to step 2). Turn ignition and all accessories off. Ensure battery voltage is 12.3 volts or more. If voltage is less than 12.3 volts, charge battery and go to step 3).
If battery hydrometer is Green, go to step 3). If battery hydrometer is Yellow or a bright color, replace battery and perform the CHARGING VERIFICATION (CH-VER) test. If battery hydrometer is dark in color, charge battery and go to next step.
Ensure battery cables, terminals and posts are clean and tight. Perform a battery load test by applying a 300-amp load for 15 seconds. Wait 15 seconds to allow battery to stabilize. Apply a load equal to 50 percent of battery cold cranking rating for 15 seconds and record minimum voltage reading.

See MINIMUM BATTERY VOLTAGE table. If battery is below voltage, replace battery and perform CHARGING VERIFICATION (CH-VER) test. If voltage reading is okay, go to next step.

MINIMUM BATTERY VOLTAGE

Battery Temperature	Minimum Volts
70°F (21°C) Or More	9.6
60°F (16°C)	9.5
50°F (10°C)	9.4
40°F (4°C)	9.3
30°F (-1°C)	9.1
20°F (-7°C)	8.9
10°F (-12°C)	8.7
0°F (-18°C)	8.5

Reconnect battery cables. Inspect alternator belt tension and condition. Replace belt as necessary. Start engine. Set engine speed to 2000 RPM for 30 seconds. Turn ignition off. Connect DRB-II. Turn ignition on with engine off. Read faults.
If DRB-II displays BATTERY TEMP SENSOR OUT OF LIMIT, replace SBEC-II and perform CHARGING VERIFICATION (CH-VER) test. If DRB-II displays other messages, go to appropriate test. If DRB-II does not display any faults, neither fault messages nor faults are intermittent. Go to TEST CH-5, CHECKING FOR INTERMITTENTS .