Reserve Capacity; Cold Cranking Amperage; Circuit Description; Starting System Description And Operation - Chevrolet Corvette 2005 Owner's Manual

2005 Chevrolet Corvette Restoration Kit
The battery specification label (example below) contains information about the following:
• The test ratings
• The original equipment catalog number
• The recommended replacement model number
A battery has 2 ratings:
• Reserve capacity
• Cold cranking amperage
CATALOG NO.
1819
CCA
I
LOAD TEST
770 380
REPLACEMENT MODEL
100-6VR
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 V. 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 (O°F) while maintaining at least 7.2 volts. Refer to Battery Usage for the cold
cranking amperage rating for this vehicle.
Circuit Description
The battery positive terminal supplies Battery Positive voltage to the under hood fuse block and the rear
fuse block. The under hood fuse block provides a cable connection for the generator and a cable
connection for the starter.
The battery negative terminal is connected to chassis ground G305 and supplies ground for the AD
converter in the DIM.
Starting System Description and Operation
The PG starter motors are non-repairable starter motors. They have pole pieces that are arranged around
the armature within the starter housing. When the solenoid windings are energized, the pull-in winding
circuit is completed to ground through the starter motor. The hold-in winding circuit is completed to
ground through the solenoid. The windings work together magnetically to pull in and hold in the plunger.
The plunger moves the shift lever. This action causes the starter drive assembly to rotate on the armature
shaft spline as it engages with the flywheel ring gear on the engine. At the same time, the plunger closes
the solenoid switch contacts in the starter solenoid. Full battery voltage is then applied directly to the
starter motor and it cranks the engine.
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