Battery Buick Century VI

Fastener Tightening Specifications

Fastener Tightening Specifications

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Diagnostic Starting Point - Engine Electrical

Begin the system diagnosis with the DIAGNOSTIC SYSTEM CHECK - ENGINE ELECTRICAL . The Diagnostic System Check will provide the following information

1. The identification of the control modules which command the system
2. The ability of the control modules to communicate through the serial data circuit
3. The identification of any stored diagnostic trouble codes (DTCs) and their status

The use of the Diagnostic System Check will identify the correct procedure for diagnosing the system and where the procedure is located.

Test Description

The numbers below refer to the step numbers on the diagnostic table.

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1. 4. Lack of communication may be because of a partial malfunction of the class 2 serial data circuit or due to a total malfunction of the class 2 serial data circuit. The specified procedure will determine the particular condition.
2. 5. The symptom list in Symptoms will determine the correct diagnostic procedure to use.
3. 6. The presence of DTCs which begin with a "U" indicate some other module is not communicating. The specified procedure will collect all the available information before you perform tests.

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Scan Tool Data Definitions

Battery Voltage: The scan tool displays Volts. The scan tool displays the battery voltage received by the module.

Crank: The scan tool displays Yes/No. The scan tool displays yes when the module receives battery positive voltage on the crank request signal circuit.

Crank Request Signal: The scan tool displays Yes/No. The scan tool displays No until the ignition is placed into the START position then Yes is displayed.

GEN L-Terminal Signal Command: The scan tool displays On/Off. The scan tool displays Off until the engine is running, then the PCM supplies then the percentage value varies depending on electrical loads

Ignition 1 Signal: The scan tool displays 0-20 Volts. The scan tool displays the voltage as received on the Ignition 1 circuit to the PCM.

IMS: The scan tool displays Park, Park/Reverse, Reverse, Reverse/Neutral, Neutral, Neutral/ Drive 4, Drive 4, Drive 4/Drive 3, Drive 3, Drive 3/Drive 2, Drive 2, Drive 2/Drive 1, Drive 1, INVALID, and OPEN. The scan tool displays the physical position of the Internal Mode Switch (IMS) of the transmission.

Starter Enable Relay Circuit Status: The scan tool displays Fault/OK/Invalid State. The scan tool displays Fault until the ignition is placed into the START position then OK is displayed.

Starter Relay Command: The scan tool displays ON/OFF. The scan tool displays Off until the ignition is placed into the START position and all parameters are met for a safe crank, then it reads On.

Volt Lamp: The scan tool displays On/Off. The scan too displays On when the module commands the volts lamp to be ON.

Symptoms - Engine Electrical

1. Perform «DIAGNOSTIC SYSTEM CHECK - ENGINE ELECTRICAL»(/buick/century/vi-1997-2005/remont/body-electrical/#battery) before using the Symptom Tables in order to verify that all of the following are true: There are no DTCs set The control modules can communicate via the serial data link.
2. Review the system description and operation in order to familiarize yourself with the system functions. Refer to the following system operation: «BATTERY DESCRIPTION AND OPERATION»(/buick/century/vi-1997-2005/remont/body-electrical/#battery)

Visual/Physical Inspection

1. Inspect for aftermarket devices which could affect the operation of the starting and charging systems. Refer to «CHECKING AFTERMARKET ACCESSORIES»(/buick/century/vi-1997-2005/remont/body-electrical/#wiring-systems__checking-aftermarket-accessories) in Wiring Systems.
2. Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to TESTING FOR INTERMITTENT AND POOR CONNECTIONS in Wiring Systems.

Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom

1. TEST A: STARTER SOLENOID DOES NOT CLICK
2. TEST B: STARTER SOLENOID CLICKS, ENGINE DOES NOT CRANK
3. TEST C: ENGINE CRANKS SLOWLY
4. TEST B: CHARGE INDICATOR ALWAYS ON
5. TEST C: CHARGE INDICATOR INOPERATIVE
6. «BATTERY INSPECTION/TEST»(/buick/century/vi-1997-2005/remont/body-electrical/#battery)
7. «BATTERY ELECTRICAL DRAIN/PARASITIC LOAD TEST»(/buick/century/vi-1997-2005/remont/body-electrical/#battery)
8. «BATTERY COMMON CAUSES OF FAILURE»(/buick/century/vi-1997-2005/remont/body-electrical/#battery)
9. TEST D: STARTER MOTOR NOISE DIAGNOSIS
10. TEST A: CHARGING SYSTEM TEST
11. TEST D: GENERATOR NOISE DIAGNOSIS

Tools Required

J 42000 Battery Tester. See Special Tools and Equipment .

Diagnostic Aids

Follow these instructions in order to avoid an incorrect diagnosis because of connections

1. If testing the vehicle with the battery cables still connected, wiggle the J 42000 clips on the terminal bolt. This may cut through any coating or through any oxidation that may be present on the bolt. Even new bolts contain a protective coating that may insulate or cause a resistance in the test circuit.
2. If correct connections to the battery terminal bolts in the vehicle are in doubt, perform the following steps: Disconnect the negative battery cable. Disconnect the positive battery cable. Install the test adapters on the terminals. Follow the instructions for an Out-of-Vehicle test.

1. If the tester displays a REPLACE BATTERY or BAD CELL-REPLACE result for a battery tested in the vehicle with the battery cables connected, perform the following steps: Disconnect the negative battery cable. Disconnect the positive battery cable. Install the tester adapters. Follow the instructions for an Out-of-Vehicle test. Replace the battery only if the Out-of-Vehicle test shows a REPLACE BATTERY or BAD CELL-REPLACE result. This prevents battery replacements that are due only to faulty battery cable connections.

1. Use the correct terminal adapters. Do not use any common bolts or a combination of bolts, nuts, and or washers as adapters when testing the battery. Use the test adapters that are provided with the J 42000 or P/N 12303040 terminal adapters. If the adapters that are provided with the J 42000 require replacement, use P/N 12303040. Any other adapter may not contact the correct areas of the battery terminal, causing a resistance that may result in an invalid battery test result.

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Tools Required

J 42000 Battery Tester. See Special Tools and Equipment .

1. For best results, use an automatic taper-rate battery charger with a voltage capability of 16 volts.
2. The charging area should be well ventilated.
3. Do not charge a battery that appears to be frozen; allow the battery to warm to room temperature and test it using the J 42000 before charging.

Charging Time Required

The time required to charge a battery will vary depending upon the following factors

1. The battery charger capacity; The higher the charger's amperage, the less time it will take to charge the battery.
2. The state-of-charge of the battery; A completely discharged battery requires more than twice as much charging time as a half charged battery. In a discharged battery with a voltage below 11 volts, the battery has a very high internal resistance and may only accept a very low current at first. Later, as the charging current causes the acid content to increase in the electrolyte, the charging current will increase. Extremely discharged batteries may not activate the reversed voltage protection in some chargers. Refer to the manufacturers instructions for operating this circuitry.
3. The temperature of the battery; The colder the battery is, the more time it takes to recharge the battery. The charging current accepted by a cold battery is very low at first. As the battery warms, the charging current will increase.

Charging Procedure

Note. Turn OFF the ignition when connecting or disconnecting the battery cables, the battery charger or the jumper cables. Failure to do so may damage the PCM or other electronic components.

Note. Refer to FASTENER NOTICE in Cautions and Notices.

When charging side-terminal batteries with the battery cables connected, connect the charger to the positive cable bolt and to a ground located away from the battery. When charging side-terminal batteries with the battery cables disconnected, install the battery side terminal adapters and connect the charger to the adapters.

Tighten

Tighten the battery side terminal adapters to 15 N.m (11 lb ft).

Use the following procedure to charge the battery

1. Turn OFF the charger.
2. Ensure that all of the battery terminal connections are clean and tight.
3. Connect the charger positive lead to the battery positive terminal on the battery or Fuse Block - Underhood. NOTE: Do not connect the negative charger lead to the housings of other vehicle electrical accessories or equipment. The action of the battery charger may damage such equipment.
4. Connect the negative charger lead to a solid engine ground or to a ground stud in the engine compartment that is connected directly to the battery negative terminal, but away from the battery. If the negative battery cable is disconnected and a terminal adapter is being used, connect directly to the adapter.
5. Turn ON the charger and set to the highest setting for normal charging.
6. Inspect the battery every half hour after starting the battery charger. Charge the battery until the until the taper-rate charger indicates that the battery is fully charged. Estimate the battery temperature by feeling the side of the battery. If it feels hot to the touch or its temperature is over 45°C (125°F), discontinue charging and allow the battery to cool before resuming charging.
7. After charging, test the battery. Refer to «BATTERY INSPECTION/TEST»(/buick/century/vi-1997-2005/remont/body-electrical/#battery) .

Tools Required

J 38758 Parasitic Draw Test Switch. See Special Tools and Equipment .

Note. Do not turn the parasitic draw test switch to the OFF position with the engine running. Damage will occur to the vehicle's electrical system.

Note. The test switch must be in the ON position when removing the fuses in order to maintain continuity in the electrical system. This avoids damaging the digital multimeter due to accidental overloading, such as a door being opened to change a fuse.

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1. Disconnect the battery negative cable from the battery negative terminal.
2. Install the male end of the J 38758 to the battery ground terminal.
3. Turn the J 38758 knob (1) to the OFF position.
4. Install the battery negative cable to the female end of the J 38758 .
5. Turn the J 38758 knob to the ON position.
6. Road test the vehicle and activate all of the accessories, including the radio and the air conditioning.
7. Park the vehicle. Turn the ignition switch to the OFF position and remove the ignition switch key.
8. Connect a 10 A fused jumper wire to the test switch tool terminals (1).
9. Turn the J 38758 knob to the OFF position. The current flows through the jumper wire.
10. Wait 1 minute. If the fuse blows use an inductive ammeter to locate the current draw.
11. Set a digital multimeter to the 10 A scale.
12. Connect the digital multimeter to the test switch tool terminals (1).
13. Turn the J 38758 knob to the OFF position. The current flows through the digital multimeter.
14. Wait 1 minute. Check and record the current reading. When there is a current reading of 2 A or less, turn the J 38758 knob to the ON position. The electrical current will now pass through the switch. Then, switch the digital multimeter down to the 2 A scale for a more accurate reading when the J 38758 knob is turned OFF.
15. Turn the J 38758 knob to the OFF position. Wait 10 minutes.
16. Check and record the current reading.
17. Note the battery reserve capacity. Refer to «BATTERY USAGE»(/buick/century/vi-1997-2005/remont/body-electrical/#battery) . 17.1. Divide the reserve capacity by 4. 17.2. Compare this to the multimeter milliampere reading taken in the previous step. The parasitic current drain should not exceed this number. Example: If a battery has a reserve capacity of 100 minutes, the current drain should not exceed 25 mA.
18. Check the charging system if the vehicle has an acceptable amount of current drain. Refer to TEST A: CHARGING SYSTEM TEST . NOTE: The test switch must be in the ON position when removing the fuses in order to maintain continuity in the electrical system. This avoids damaging the digital multimeter due to accidental overloading, such as a door being opened to change a fuse.
19. When the vehicle has an unacceptable amount of parasitic current drain, remove each fuse one at a time until the current drain falls to an acceptable level. This will indicate which circuit is causing the drain. Refer to «POWER DISTRIBUTION»(ref-154365-S20445904682003080900000) for Century or «POWER DISTRIBUTION»(ref-154369-S35763614002003080900000) for Regal in System Wiring Diagrams. To diagnose exactly which part of the suspect circuit is causing the parasitic drain. In some cases a non-fused circuit or component, such as a generator, is the cause of excessive parasitic current drain.
20. Repeat the parasitic current drain test procedure after any repair has been completed to make sure that the parasitic current drain is at an acceptable level.
21. When the cause of the excessive current draw has been located and repaired, remove the J 38758 .
22. Connect the battery negative cable to the battery negative terminal. Tighten Tighten the negative battery cable terminal bolt to 17 N.m (13 lb ft).

A battery is not designed to last forever. With proper care, however, the battery will provide years of good service. If the battery tests good but still fails to perform well, the following are some of the more common causes

1. A vehicle accessory was left on overnight.
2. The driving speeds have been slow with frequent stops, stop-and-go driving, with many electrical accessories in use, particularly air conditioning, headlights, wipers, heated rear window, cellular telephone, etc.
3. The electrical load has exceeded the generator output, particularly with the addition of aftermarket equipment.
4. Existing conditions in the charging system, including the following possibilities: A slipping belt A bad generator
5. The battery has not been properly maintained, including a loose battery hold down or missing battery insulator if used.
6. There are mechanical conditions in the electrical system, such as a short or a pinched wire, attributing to power failure. Refer to GENERAL ELECTRICAL DIAGNOSIS PROCEDURES in Wiring Systems.

Electrolyte Freezing

The freezing point of electrolyte depends on its specific gravity. A fully charged battery will not freeze until the ambient temperature gets below -54°C (-65°F). However, a battery with a low state of charge may freeze at temperatures as high as -7°C (20°F). Since freezing may ruin a battery, the battery should be protected against freezing by keeping it properly charged. As long as the green eye is visible in the hydrometer, the freezing point of the battery will be somewhere below -32°C (-25°F).

Certain devices on the vehicle maintain a small continuous current drain, parasitic load, on the battery. A battery that is not used for an extended period of time will discharge. Eventually permanent damage will result. Discharged batteries will also freeze in cold weather. Refer to BATTERY INSPECTION/TEST .

In order to maintain the battery state of charge while storing the vehicle for more than 30 days

1. Ensure that the green dot is visible in the built-in hydrometer. CAUTION: Refer to Battery Disconnect Caution in Cautions and Notices.
2. Disconnect the battery ground cable to protect the battery from discharge by parasitic current drains.

When the battery cannot be disconnected

1. Maintain a high state of charge.
2. Establish a regular schedule for recharging the battery every 20-45 days.

A battery that has remained in a discharged state for a long period of time is difficult to recharge or may be permanently damaged.

Jump Starting in Case of Emergency

Note. This vehicle has a 12 volt, negative ground electrical system. Make sure the vehicle or equipment being used to jump start the engine is also 12 volt, negative ground. Use of any other type of system will damage the vehicle's electrical components.

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1. Position the vehicle with the booster battery so that the jumper cables will reach. Do not let the 2 vehicles touch. Make sure that the jumper cables do not have loose ends, or missing insulation.
2. Place an automatic transmission in PARK. If equipped with a manual transmission, place in NEUTRAL and block the wheels.
3. Turn OFF all electrical loads on both vehicles that are not needed.
4. Turn OFF the ignition on both vehicles.
5. Connect the red positive (+) cable to the battery positive (+) terminal (2) of the vehicle with the discharged battery. Use a remote positive (+) terminal if the vehicle has one.
6. Connect the red positive (+) cable to the positive (+) terminal (1) of the booster battery. Use a remote positive (+) terminal if the vehicle has one.
7. Connect the black negative (-) cable to the negative (-) terminal (3) of the booster battery. CAUTION: Do not connect a jumper cable directly to the negative terminal of a discharged battery to prevent sparking and possible explosion of battery gases.
8. The final connection is made to a heavy, unpainted metal engine part (4) of the vehicle with the discharged battery. This final attachment must be at least 46 cm (18 in) away from the dead battery.
9. Start the engine of the vehicle that is providing the boost. NOTE: Never operate the starter motor more than 15 seconds at a time without pausing in order to allow it to cool for at least 2 minutes. Overheating will damage the starter motor.
10. Crank the engine of the vehicle with the discharged battery.
11. The black negative (-) cable must be first disconnected from the vehicle that was boosted (4).
12. Disconnect the black negative (-) cable from the negative (-) terminal (3) of the booster battery. NOTE: Do not let the cable end touch any metal. Damage to the battery and other components may result.
13. Disconnect the red positive (+) cable from the positive (+) terminal (1) of the booster battery.
14. Disconnect the red positive (+) cable from the remote positive (+) terminal (2) of the vehicle with the discharged battery.

Removal Procedure

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1. Record all of the vehicle preset radio stations.
2. Turn OFF all the lamps and the accessories.
3. Ensure the ignition switch is in the OFF position.
4. Disconnect the negative battery cable from the battery.

Installation Procedure

Note. Refer to FASTENER NOTICE in Cautions and Notices.

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1. Connect the negative battery cable to the battery. Tighten Tighten the bolt to 15 N.m (11 lb ft).
2. Set the clock and program the radio stations back into the radio as recorded at the beginning of the procedure. Refer to RADIO/AUDIO SYSTEM DESCRIPTION AND OPERATION in Entertainment.

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1. Disconnect the negative battery cable. Refer to «BATTERY NEGATIVE CABLE DISCONNECT/CONNECT PROCEDURE»(/buick/century/vi-1997-2005/remont/body-electrical/#battery) .
2. Disconnect the positive battery cable from the battery.
3. Remove the ground wire bolt from the frame.
4. Remove the remote positive stud cover.
5. Remove the positive battery cable junction block lead nut.
6. Remove the positive battery cable from the bussed electrical center (BEC).
7. Remove the BEC from the strut tower.
8. Unclip and remove the positive battery cable harness from the BEC.
9. Raise and support the vehicle. Refer to «LIFTING AND JACKING THE VEHICLE»(/buick/century/vi-1997-2005/remont/hoistjack/#jacking-and-lifting__lifting-and-jacking-the-vehicle) in General Information.
10. Remove the front lower air deflector. Refer to RADIATOR AIR BAFFLE AND DEFLECTOR REPLACEMENT - LOWER in Engine Cooling.
11. Remove the positive battery cable from the starter motor BAT terminal.
12. Remove the transaxle stud nut.
13. Remove the ground cable from the transaxle stud.
14. Unclip and remove the battery cable harness from the retainers.
15. Remove the battery cable harness from the vehicle.
16. Remove the negative battery cable from the wiring harness conduit.

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1. Install the negative battery cable into the wiring harness conduit.
2. Install the battery cable harness to the vehicle.
3. Install the battery cable harness to the retainers.
4. Install the ground cable to the transaxle stud. NOTE: Refer to «FASTENER NOTICE»(/buick/century/vi-1997-2005/remont/oem-general-information/#gm-vehicles-cautions-notices__fastener-notice) in Cautions and Notices.
5. Install the transaxle stud nut. Tighten Tighten the nut to 30 N.m (22 lb ft).
6. Install the positive battery cable to the starter motor BAT terminal.
7. Install the starter solenoid BAT terminal nut. Tighten Tighten the nut to 9.5 N.m (84 lb in).
8. Install the front lower air deflector. Refer to RADIATOR AIR BAFFLE AND DEFLECTOR REPLACEMENT - LOWER in Engine Cooling.
9. Lower the vehicle.
10. Install the positive battery cable harness to the BEC.
11. Install the BEC to the strut tower.
12. Install the positive battery cable to the BEC.
13. Install the junction block lead nut to the positive battery cable. Tighten Tighten the nut to 10 N.m (89 lb in).
14. Install the remote positive stud cover.
15. Install the ground wire and the bolt to the frame. Tighten Tighten the bolt to 10 N.m (89 lb in).
16. Install the positive battery cable to the battery. Tighten Tighten the bolt to 15 N.m (11 lb ft).
17. Connect the negative battery cable. Refer to «BATTERY NEGATIVE CABLE DISCONNECT/CONNECT PROCEDURE»(/buick/century/vi-1997-2005/remont/body-electrical/#battery) .

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1. Disconnect the negative battery cable. Refer to «BATTERY NEGATIVE CABLE DISCONNECT/CONNECT PROCEDURE»(/buick/century/vi-1997-2005/remont/body-electrical/#battery) .
2. Disconnect the positive battery cable from the battery.
3. Remove the ground wire bolt from the frame.
4. Remove the remote positive stud cover.
5. Remove the junction block lead nut from the positive battery cable.
6. Remove the positive battery cable from the bussed electrical center (BEC).
7. Remove the BEC from the strut tower.
8. Unclip and remove the positive battery cable harness from the BEC.
9. Raise and support the vehicle. Refer to «LIFTING AND JACKING THE VEHICLE»(/buick/century/vi-1997-2005/remont/hoistjack/#jacking-and-lifting__lifting-and-jacking-the-vehicle) in General Information.
10. Remove the front lower air deflector. Refer to RADIATOR AIR BAFFLE AND DEFLECTOR REPLACEMENT - LOWER in Engine Cooling.
11. Remove the positive battery cable from the starter motor BAT terminal.
12. Remove the transaxle stud nut.
13. Remove the ground cable from the transaxle stud.
14. Unclip and remove the battery cable harness from the retainers.
15. Remove the battery cable harness from the vehicle.
16. Remove the positive battery cable from the wiring harness conduit.

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1. Install the positive battery cable into the wiring harness conduit.
2. Install the battery cable harness to the vehicle.
3. Install the battery cable harness to the retainers.
4. Install the ground cable to the transaxle stud. NOTE: Refer to «FASTENER NOTICE»(/buick/century/vi-1997-2005/remont/oem-general-information/#gm-vehicles-cautions-notices__fastener-notice) in Cautions and Notices.
5. Install the transaxle stud nut. Tighten Tighten the nut to 30 N.m (22 lb ft).
6. Install the positive battery cable to the starter motor BAT terminal.
7. Install the nut to the starter solenoid BAT terminal. Tighten Tighten the nut to 9.5 N.m (84 lb in).
8. Install the front lower air deflector. Refer to RADIATOR AIR BAFFLE AND DEFLECTOR REPLACEMENT - LOWER in Engine Cooling.
9. Lower the vehicle.
10. Install the positive battery cable harness to the BEC.
11. Install the BEC to the strut tower.
12. Install the positive battery cable to the BEC.
13. Install the junction block lead nut to the positive battery cable. Tighten Tighten the lead nut to 10 N.m (89 lb in).
14. Install the remote positive stud cover.
15. Install the ground wire and the bolt to the frame. Tighten Tighten the bolt to 10 N.m (89 lb in).
16. Install the positive battery cable to the battery. Tighten Tighten the terminal bolt to 15 N.m (11 lb ft).
17. Connect the negative battery cable. Refer to «BATTERY NEGATIVE CABLE DISCONNECT/CONNECT PROCEDURE»(/buick/century/vi-1997-2005/remont/body-electrical/#battery) .

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1. Disconnect the negative battery cable. Refer to «BATTERY NEGATIVE CABLE DISCONNECT/CONNECT PROCEDURE»(/buick/century/vi-1997-2005/remont/body-electrical/#battery) .
2. Remove the right front diagonal brace. Refer to BRACE REPLACEMENT - FRONT FENDER UPPER DIAGONAL in Body Front End.
3. Disconnect the positive battery cable.
4. Remove the retainer bolt (1) that holds the battery in place.
5. Remove the battery retainer (2). IMPORTANT: Do not tip the battery more than 40 degrees during removal.
6. Remove the battery (3).
7. Remove the insulator from the battery.

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1. Install the insulator to the battery. IMPORTANT: Do not tip the battery more than 40 degrees during installation.
2. Install the battery (3).
3. Install the battery retainer (2). NOTE: Refer to «FASTENER NOTICE»(/buick/century/vi-1997-2005/remont/oem-general-information/#gm-vehicles-cautions-notices__fastener-notice) in Cautions and Notices.
4. Install the retainer bolt (1) to the battery. Tighten Tighten the bolt to 18 N.m (13 lb ft).
5. Connect the positive battery cable to the battery. Tighten Tighten the bolt to 15 N.m (11 lb ft).
6. Install the right front diagonal brace. Refer to BRACE REPLACEMENT - FRONT FENDER UPPER DIAGONAL in Body Front End.
7. Connect the negative battery cable. Refer to «BATTERY NEGATIVE CABLE DISCONNECT/CONNECT PROCEDURE»(/buick/century/vi-1997-2005/remont/body-electrical/#battery) .

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1. Disconnect the negative battery cable. Refer to «BATTERY NEGATIVE CABLE DISCONNECT/CONNECT PROCEDURE»(/buick/century/vi-1997-2005/remont/body-electrical/#battery) .
2. Remove the battery. Refer to «BATTERY REPLACEMENT»(/buick/century/vi-1997-2005/remont/body-electrical/#battery) .
3. Remove the battery tray bolts.
4. Remove the battery tray.

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1. Install the battery tray. NOTE: Refer to «FASTENER NOTICE»(/buick/century/vi-1997-2005/remont/oem-general-information/#gm-vehicles-cautions-notices__fastener-notice) in Cautions and Notices.
2. Install the battery tray bolts. Tighten Tighten the battery tray bolts to 5 N.m (44 lb in).
3. Install the battery. Refer to «BATTERY REPLACEMENT»(/buick/century/vi-1997-2005/remont/body-electrical/#battery) .
4. Connect the negative battery cable. Refer to «BATTERY NEGATIVE CABLE DISCONNECT/CONNECT PROCEDURE»(/buick/century/vi-1997-2005/remont/body-electrical/#battery) .

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Batteries that are not part of the vehicle itself, not the battery under the hood, must only be transported on public streets for business purposes via approved hazardous material transportation procedures.

Battery storage, charging and testing facilities in repair shops must meet various requirements for ventilation, safety equipment, material segregation, etc.

The maintenance free battery is standard. There are no vent plugs in the cover. The battery is completely sealed except for 2 small vent holes in the side. These vent holes allow the small amount of gas that is produced in the battery to escape.

The battery has 3 functions as a major source of energy

1. Engine cranking
2. Voltage stabilizer
3. Alternate source of energy with generator overload The battery specification label, example below, contains information about the following

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1. The test ratings
2. The original equipment catalog number
3. The recommended replacement model number

A battery has 2 ratings

1. Reserve capacity
2. Cold cranking amperage

When a battery is replaced use a battery with similar ratings. Refer to the battery specification label on the original battery or refer to BATTERY USAGE .

Reserve Capacity

Reserve capacity is the amount of time in minutes it takes a fully charged battery, being discharged at a constant rate of 25 amperes and a constant temperature of 27°C (80°F) to reach a terminal voltage of 10.5 volts. Refer to BATTERY USAGE for the reserve capacity rating of the original equipment battery.

Cold Cranking Amperage

The cold cranking amperage is an indication of the ability of the battery to crank the engine at cold temperatures. The cold cranking amperage rating is the minimum amperage the battery must maintain for 30 seconds at -18°C (0°F) while maintaining at least 7.2 volts. Refer to BATTERY USAGE for the cold cranking amperage rating for this vehicle.

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See also:
• CHECKING AFTERMARKET ACCESSORIES
• TESTING FOR INTERMITTENT AND POOR CONNECTIONS
• FASTENER NOTICE
• LIFTING AND JACKING THE VEHICLE
• DIAGNOSTIC SYSTEM CHECK - ENGINE ELECTRICAL