H2 V8-6.2L (2008)
Oil Level Sensor: 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: General Electrical Diagnostic Procedures/Circuit Testing/Using Connector Test Adapters)
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Probing Electrical Connectors (See: General Electrical Diagnostic Procedures/Circuit Testing/Probing Electrical Connectors)
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Troubleshooting with a Digital Multimeter (See: General Electrical Diagnostic Procedures/Circuit Testing/Troubleshooting With A Digital
Multimeter)
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Troubleshooting with a Test Lamp (See: General Electrical Diagnostic Procedures/Circuit Testing/Troubleshooting With A Test Lamp)
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Using Fused Jumper Wires (See: General Electrical Diagnostic Procedures/Circuit Testing/Using Fused Jumper Wires)
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Measuring Voltage (See: General Electrical Diagnostic Procedures/Circuit Testing/Measuring Voltage)
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Measuring Voltage Drop (See: General Electrical Diagnostic Procedures/Circuit Testing/Measuring Voltage Drop)
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Measuring Frequency (See: General Electrical Diagnostic Procedures/Circuit Testing/Measuring Frequency)
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Testing for Continuity (See: General Electrical Diagnostic Procedures/Circuit Testing/Testing For Continuity)
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Testing for Short to Ground (See: General Electrical Diagnostic Procedures/Circuit Testing/Testing For Short to Ground)
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Testing for a Short to Voltage (See: General Electrical Diagnostic Procedures/Circuit Testing/Testing For A Short to Voltage)
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Testing for Intermittent Conditions and Poor Connections (See: General Electrical Diagnostic Procedures/Circuit Testing/Testing For Intermittent
and Poor Connections)
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Inducing Intermittent Fault Conditions (See: General Electrical Diagnostic Procedures/Circuit Testing/Inducing Intermittent Fault Conditions)
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Testing for Electrical Intermittents (See: General Electrical Diagnostic Procedures/Circuit Testing/Testing For Electrical Intermittents)
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Scan Tool Snapshot Procedure (See: General Electrical Diagnostic Procedures/Circuit Testing/Scan Tool Snapshot Procedure)
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Circuit Protection - Fuses (See: General Electrical Diagnostic Procedures/Wiring Repairs/Circuit Protection - Fuses)
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Circuit Protection - Circuit Breakers (See: General Electrical Diagnostic Procedures/Wiring Repairs/Circuit Protection - Circuit Breakers)
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Circuit Protection - Fusible Links (See: General Electrical Diagnostic Procedures/Wiring Repairs/Circuit Protection - Fusible Links)
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
