LaCrosse FWD V6-3.0L (2010)
Keyless Entry Transmitter: Diagnostic Aids
Testing for Electrical Intermittents
Testing for Electrical Intermittents
Special Tools
EL-39200 Digital Multimeter
For equivalent regional tools, refer to Special Tools (See: Power and Ground Distribution/Tools and Equipment).
Perform the following procedures while wiggling the harness from side to side. Continue this at convenient points (about 6 inches apart) while watching
the test equipment.
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Testing for Short to Ground (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit Testing/Testing For Short to Ground
)
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Testing for Continuity (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit Testing/Testing For Continuity)
*
Testing for a Short to Voltage (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit Testing/Testing For A Short to
Voltage)
If the fault is not identified, perform the procedure below using the MIN MAX feature on the EL-39200 DMM. This feature allows you to manipulate the
circuit without having to watch the EL-39200. The EL-39200 will generate an audible tone when a change is detected.
Note: The EL-39200 must be used in order to perform the following procedure since the EL-39200 can monitor current, resistance or voltage while
recording the minimum (MIN), and maximum (MAX) values measured.
1. Connect the EL-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 EL-39200 to the circuit.
2. Set the rotary dial of the EL-39200 to the V (AC) or V (DC) position.
3. Press the range button of the EL-39200 in order to select the desired voltage range.
4. Press the MIN MAX button of the EL-39200. The EL-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.
