Intermittent failures in electronic systems may be very difficult
to detect and accurately diagnose. For this reason, a good description of
the complaint may be useful in locating an intermittent malfunction. Faulty
wires or connections cause most intermitting problems. When an intermitting
condition is suspected, inspect the suspected circuits for the
following conditions:
| • | Poor mating of connector halves of backed out terminals |
| • | Improperly formed or damaged terminals |
| • | Poor wire to terminal connections |
| • | Dirty or corroded terminals |
History DTCs are those indicating that the RKE system has previously
detected a malfunction. The reason could be either that the malfunction is
intermittent or that the conditions for setting the DTC are not met. Try
clearing the DTCs and manually operate the system that the DTC applies to.
Read the Diagnostic Aids and Conditions for Setting the DTC in each DTC table
for more specific information.
History DTCs help in diagnosing intermittent fault conditions but do
not necessarily indicate a faulty receiver. The receiver and transmitters
are reliable components and is not the likely cause of the malfunction. Most
system complaints are linked to faulty wiring and connectors, and occasionally
to a component. Perform a thorough inspection of all related wiring and connectors
pertaining to the history DTC that is stored.
The following conditions may result in intermittent RKE operation with
no DTC stored:
| • | Any condition which results in the interruption of power to the
RKE receiver. |
| • | The battery or ignition voltage is out of range (below 9.0 volts
or above 16.0 volts). |
| • | A loose or damaged ground. |
| • | An open or a short on the serial data line. |
