Battery Inspection/Test
Battery Inspection/Test |
Diagnostic Instructions |
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Perform the
Diagnostic System Check - Vehicle
prior to using this diagnostic procedure.
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Review
Strategy Based Diagnosis
for an overview of the diagnostic approach.
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Diagnostic Procedure Instructions
provides an overview of each diagnostic category.
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Diagnostic Aids |
Refer to Battery Disconnect Warning .
Note | ||
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The battery test using the EL 42000 Battery Tester requires correct connections to the battery terminals. A failure to obtain the correct connections during the test may result in a failed test on a good battery.
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Use the Out of Vehicle test for each battery when testing a vehicle with dual batteries.
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Follow these instructions in order to avoid an incorrect diagnosis because of connections:
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If testing the vehicle with the battery cables still connected, wiggle the EL 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. |
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If correct connections to the battery terminal bolts in the vehicle are in doubt, perform the following steps:
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1. |
Disconnect the negative battery cable.
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2. |
Disconnect the positive battery cable.
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3. |
Install the test adapters on the terminals.
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4. |
Follow the instructions for testing a removed battery.
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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:
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1. |
Disconnect the negative battery cable.
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2. |
Disconnect the positive battery cable.
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3. |
Install the tester adapters.
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4. |
Follow the instructions for testing a removed battery. |
5. |
Replace the battery only if the second test shows a REPLACE BATTERY or BAD CELL-REPLACE result.
Use the test code from the second test for any warranty purposes. |
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Use the correct terminal adapters.
Do not use any common bolts or a combination of bolts, of nuts, and of washers as adapters when testing the battery. Use the test adapters that are provided with the EL 42000 or GM P/N 12303040 terminal adapters. If the adapters that are provided with the EL 42000 require replacement, use GM 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. |
Reference Information |
Schematic Reference
Starting and Charging Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Starting System Description and Operation
Electrical Information Reference
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Circuit Testing
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Connector Repairs
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Testing for Intermittent Conditions and Poor Connections
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Wiring Repairs
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Scan Tool Reference
Control Module References for scan tool information
Special Tools
EL 42000 Battery Tester
For equivalent regional tools, refer to Special Tools .
Circuit/System Testing |
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1. |
Inspect the C1 battery for a cracked, broken, or damaged case, which may be indicated by battery acid leakage.
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2. |
If there is any apparent damage, replace the C1 battery.
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3. |
Verify the cold cranking amperage and amp hour rating of the battery to the original battery or original equipment (OE) specification. Refer to
Battery Usage
.
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4. |
If the C1 battery does not meet or exceed specifications, replace the C1 battery.
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5. |
Verify that the battery cables are clean and tight. The battery terminal bolts should be torqued as specified in
Fastener Tightening Specifications
.
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6. |
If the battery cables need to be cleaned, clean as required and tighten as specified.
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7. |
If the battery cables are damaged, replace then tighten as specified.
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8. |
Install the EL 42000 and follow directions supplied by the tester.
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9. |
If the tester calls for charging the battery, refer to
Battery Charging
.
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Repair Instructions |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
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Battery Positive Cable Replacement
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Battery Negative Cable Replacement (Gasoline)
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Battery Replacement
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