Aveo L4-1.6L (2008)
Radiator Cooling Fan Motor: Diagnostic Aids
Checking Aftermarket Accessories
Checking Aftermarket Accessories
Do not connect aftermarket accessories into the following circuits:
Caution: Refer to SIR Caution (See: Restraint Systems/Service Precautions/Technician Safety Information/SIR Caution).
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SIR circuits, all such circuits are indicated on circuit diagrams with the SIR symbol.
Notice: Refer to OBD II Symbol Description Notice.
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OBD II circuits, all such circuits are indicated on circuit diagrams with the OBD II symbol.
Always check for aftermarket accessories (non-OEM) as the first step in diagnosing electrical problems. If the vehicle is so equipped, disconnect the
system to verify that these add-on accessories are not the cause of the problems.
Possible causes of vehicle problems related to aftermarket accessories include:
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Power feeds connected to points other than the battery
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Antenna location
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Transceiver wiring located too close to vehicle electronic modules or wiring
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Poor shielding or poor connectors on antenna feed line
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Check for recent service bulletins detailing installation guidelines for aftermarket accessories.
Circuit Testing
Circuit Testing
The Circuit Testing section contains the following diagnostic testing information. Using this information along with the diagnostic procedures will
identify the cause of the electrical malfunction.
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Using Connector Test Adapters (See: Testing and Inspection/Component Tests and General Diagnostics)
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Probing Electrical Connectors (See: Testing and Inspection/Component Tests and General Diagnostics)
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Troubleshooting with a Digital Multimeter (See: Testing and Inspection/Component Tests and General Diagnostics)
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Troubleshooting with a Test Lamp (See: Testing and Inspection/Component Tests and General Diagnostics)
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Using Fused Jumper Wires (See: Testing and Inspection/Component Tests and General Diagnostics)
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Measuring Voltage (See: Testing and Inspection/Component Tests and General Diagnostics)
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Measuring Voltage Drop (See: Testing and Inspection/Component Tests and General Diagnostics)
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Measuring Frequency (See: Testing and Inspection/Component Tests and General Diagnostics)
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Testing for Continuity (See: Testing and Inspection/Component Tests and General Diagnostics)
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Testing for Short to Ground (See: Testing and Inspection/Component Tests and General Diagnostics)
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Testing for a Short to Voltage (See: Testing and Inspection/Component Tests and General Diagnostics)
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Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics)
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Inducing Intermittent Fault Conditions (See: Testing and Inspection/Component Tests and General Diagnostics)
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Testing for Electrical Intermittents (See: Testing and Inspection/Component Tests and General Diagnostics)
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Scan Tool Snapshot Procedure (See: Testing and Inspection/Component Tests and General Diagnostics)
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Circuit Protection - Fuses (See: Testing and Inspection/Component Tests and General Diagnostics)
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Circuit Protection - Circuit Breakers (See: Testing and Inspection/Component Tests and General Diagnostics)
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Circuit Protection - Fusible Links (See: Testing and Inspection/Component Tests and General Diagnostics)
Inducing Intermittent Fault Conditions
Inducing Intermittent Fault Conditions
Tools Required
J 25070 Heat Gun
Many intermittent open or shorted circuits are affected by harness/connector movement that is caused by vibration, engine torque, bumps/rough
pavement, etc. In order to duplicate the customer's concern, it may be necessary to manipulate the wiring harness if the malfunction appears to be
vibration related. Manipulation of a circuit can consist of a wide variety of actions, including:
