Hombre L4-2.2L CPC (1996)
1. Separate the connector halves. Refer to Terminal Repair Kit, J 38125-A, J 38125-4.
2. Inspect the connector halves for contamination. Contamination will result in a white or green build-up within the connector body or between
terminals, causing HI terminal resistance, intermittent contact or an open circuit. An underhood or underbody connector that shows signs of
contamination should be replaced in its entirety: terminals, seals and connector body.
3. Using an equivalent male terminal from the Terminal Repair Kit, J 38125-A, check the retention force of the female terminal in question by
inserting and removing the male terminal to the female terminal in the connector body. Good terminal contact will require a certain amount of
force to separate the terminals.
4. Using an equivalent female terminal from the Terminal Repair Kit, J 38125-A, compare the retention force of this terminal to the female
terminal in question by joining and separating the male terminal to the good female terminal, and then joining and separating the male terminal
to the female terminal in question. If the retention force is significantly different between the two female terminals, replace the female terminal
in question (refer to Terminal Repair Kit, J 38125-A).
If a visual (physical) check does not reveal the cause of the problem, the vehicle may be able to be driven with a Digital Voltmeter (DVM)
connected to the suspected circuit. An abnormal voltage reading when the problem occurs indicates the problem may be in that circuit.
Detecting Electrical Intermittents
PROCEDURE
Use the following procedure to detect intermittent terminal contact or a broken wire with an intermittent connection inside the insulation.
The J 39200 Digital Voltmeter has the ability to monitor current, resistance, or voltage while recording the minimum (MIN) and maximum
(MAX) values measured. The meter can also be set to display the average (AVG) value measured.
When diagnosing circuits that have voltage applied, use the voltage setting to monitor a connector (or length of a circuit) which is suspected of
having an intermittent connection but is currently operating normally.
1. Connect the J 39200 Digital Voltmeter to both sides of a suspect connector (still connected) or from one end of a suspect circuit to the other.
This will continuously monitor the terminal contacts or length of wire being checked. Refer Meter Connections for examples of the various
methods for connecting the meter to the circuit.
2. Set the meter for voltage. Since the "MIN MAX" mode does not use auto ranging, manually select the voltage range necessary before
proceeding.
3. Press the "MIN MAX" button. The meter should read "100 ms RECORD" (100 millisecond record) and emit a 1/4 Second beep. The meter
is now ready to record and will generate an audible tone for any change in voltage. At this point, you may wish to press the "PEAK MIN
MAX" button, which will record any voltage variations that occur for at least 1 millisecond.
4. Try to simulate the condition that is potentially causing an intermittent connection, either by wiggling connections or wiring, test driving or
performing other operations. If an open or resistance is created, a voltage will be present and the meter will emit a tone for as long as the open
or resistance exists. Any change in voltage will cause the meter to emit a tone for no less than 1/4 Second. (Listening for a tone while
manipulating wiring is very helpful for narrowing down an intermittent connection.)
Use the MIN and MAX values when the meter is out of sight or sound range, in noisy areas or for test driving when it may not be possible to
monitor the meter.
To check the MIN and MAX recorded voltages press "MIN MAX" once for MAX and twice for MIN. A variation between MIN and MAX
recorded voltages (unless nearly 0 Volts) suggests an intermittent open or that resistance exists and should be repaired as necessary.
IMPORTANT: The "100 ms RECORD" (100 millisecond record) mode is NOT the amount of time allowed to perform a specific
procedure. It is the amount of time used to record each snapshot of information used for calculating "AVG" when in the "MIN MAX" mode.
Meter Connections
The previous diagnostic procedure was written to detect intermittents using the meter set to voltage. Whether using the current, voltage or resistance
setting to detect intermittents, it is necessary to connect the meter to the circuit.
Following are examples of the various methods of connecting the meter to the circuit to be checked:
^
Backprobe both ends of the connector and either hold the leads in place while manipulating the connector or tape the leads to the harness for
continuous monitoring while performing other operations or test driving. (Do not backprobe "Weather Pack(R)" type connectors.)
^
Disconnect the harness at both ends of the suspect circuit where it connects either to a component or to other harnesses.
^
Use Connector Test Adapter Kit J 35616-A to connect the meter to the circuit.
^
If the system being diagnosed has a specified Pinout or breakout box, it may be used to simplify connecting the meter to the circuit or for checking
multiple circuits quickly.
Additional Information
NOTE: Turn OFF power to the test circuit before attempting in-circuit resistance measurements to prevent false readings or damage to the meter. Do
not use the meter to measure resistance through a solid state module.
Continuity tests that work well for detecting intermittent shorts to ground can be performed by setting the meter to "Ohms" then pressing the "PEAK
MIN MAX" button. An audible tone will be heard whenever the meter detects continuity for at least 1 millisecond.