Checks
| Action
|
DEFINITION: The
problem may or may not turn ON the Malfunction Indicator Lamp (MIL) or store
a Diagnostic Trouble Code (DTC).
|
Preliminary Checks
| Refer to
Symptoms
.
|
Damaged Electrical Connections or Wiring
|
- Carefully reform all the connector terminals in the problem circuit
in order to ensure the proper contact tension. If necessary replace
all the connector terminals in the problem circuit in order
to ensure the proper contact tension. Refer to
Connector Repairs
in Wiring Systems.
- An intermittent may be caused by a poor connection, rubbed through
wire insulation, or a broken wire inside the insulation.
- Thoroughly check any circuitry that is suspected of causing the
intermittent complaint. Refer to
Testing for Intermittent Conditions and Poor Connections
in Wiring Systems.
- If a repair is necessary, then refer to
Wiring Repairs
or
Connector Repairs
in Wiring Systems.
|
Road
Test
| If a
visual and physical check does not locate the cause of the problem, drive
the vehicle with a DMM connected to a suspected circuit or use a scan
tool.
When the problem occurs, an abnormal voltage or scan reading indicates
the problem may be in that circuit.
|
Intermittent Components
| The following components can cause
an intermittent:
| • | A defective relay, control module driven solenoid, or a switch
that can cause an electrical system interference. Normally, the problem will
occur when the faulty component is operating. |
| • | The improper installation of electrical devices, such as lights,
2-way radios, electric motors, etc. |
| • | Route the ignition control (IC) wires away from the spark plug
wires, ignition system components and the generator. The wire for the engine
ground from the control module to the ignition system should
be a good ground. |
| • | The ignition secondary voltage shorted to a ground. |
| • | The control module grounds. |
|
