Vibe FWD L4-1.8L (2010)
recording the minimum (MIN), and maximum (MAX) values measured.
1. Connect the J 39200 to both sides of a suspected connector (still connected), or from one end of a suspected circuit to the other. Refer to
Troubleshooting with a Digital Multimeter (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit
Testing/Troubleshooting with a Digital Multimeter) for information on connecting the J 39200 to the circuit.
2. Set the rotary dial of the J 39200 to the V (AC) or V (DC) position.
3. Press the range button of the J 39200 in order to select the desired voltage range.
4. Press the MIN MAX button of the J 39200 . The J 39200 displays 100 ms RECORD and emits an audible tone (beep).
Note: The 100 ms RECORD mode is the length of time an input must stay at a new value in order to record the full change.
5. Simulate the condition that is potentially causing the intermittent connection, either by wiggling the connections or the wiring, test driving, or
performing other operations. Refer to Inducing Intermittent Fault Conditions (See: Testing and Inspection/Component Tests and General
Diagnostics/Circuit Testing/Inducing Intermittent Fault Conditions).
6. Listen for the audible Min Max Alert which indicates that a new minimum or maximum value has been recorded.
7. Press the MIN MAX button once in order to display the MAX value and note the value.
8. Press the MIN MAX button again in order to display the MIN value and note the value.
9. Determine the difference between the MIN and MAX values.
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If the variation between the recorded MIN and MAX voltage values is 1 V or greater an intermittent open or high resistance condition exists.
Repair the condition as necessary.
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If the variation between the recorded MIN and MAX voltage values is less than 1 V, an intermittent open or high resistance condition does not
exist.
Testing for Intermittent Conditions and Poor Connections
Testing for Intermittent Conditions and Poor Connections
Tools Required
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J 35616 GM-Approved Terminal Test Kit
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J-38125 Terminal Repair Kit
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J 42675 Flat-Wire Probe Adapter
Most intermittent conditions are caused by faulty electrical connections or wiring. Inspect for the following items:
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Wiring broken inside the insulation
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Poor connection between the male and female terminal at a connector.
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Poor terminal to wire connection-Some conditions which fall under this description are poor crimps, poor solder joints, crimping over the wire
insulation rather than the wire itself and corrosion in the wire to terminal contact area, etc.
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Wire insulation which is rubbed through-This causes an intermittent short as the bare area touches other wiring or parts of the vehicle.
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Refer to Inducing Intermittent Fault Conditions (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit Testing/Inducing
Intermittent Fault Conditions) in order to duplicate the conditions required in order to verify the complaint.
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Refer to Testing for Electrical Intermittents (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit Testing/Testing for
Electrical Intermittents) for test procedures to detect intermittent open, high resistance, short to ground, and short to voltage conditions.
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Refer to Scan Tool Snapshot Procedure (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit Testing/Scan Tool
Snapshot Procedure) for advanced intermittent diagnosis.
Testing for Proper Terminal Contact
It is important to test terminal contact at the component and any inline connectors before replacing a suspect component. Mating terminals must be
inspected to ensure good terminal contact. A poor connection between the male and female terminal at a connector may be the result of contamination or
deformation.
Contamination may be caused by the connector halves being improperly connected. A missing or damaged connector seal, damage to the connector
itself, or exposing the terminals to moisture and dirt can also cause contamination. Contamination, usually in the underhood or underbody connectors,
leads to terminal corrosion, causing an open circuit or intermittently open circuit.
Deformation is caused by probing the mating side of a connector terminal without the proper adapter. Always use the J 35616 when probing connectors.
Other causes of terminal deformation are improperly joining the connector halves, or repeatedly separating and joining the connector halves.
Deformation, usually to the female terminal contact tang, can result in poor terminal contact causing an open or intermittently open circuit.
Round Wire Connectors
Follow the procedure below to test terminal contact of Metri-Pack or 56 series terminals. Refer to the J-38125 or the J 38125-4 Instruction Manual for
terminal identification.
