Ford Corsar Repair Manual page 185

E.C.C.S. DESCRIPTION
Control Unit Systems (Con't)
Diagnostic System
The E.C.C.S. system incorporates a diagnostic system to aid rectifi-
cation should a malfunction occur.
The system utilizes an E.C.M. lamp in the instrument cluster to:
Indicate to the driver that a malfunction has occurred and that it
should be attended to as soon as practicable.
To provide code information to the technician of recorded
malfunction and indicate mixture condition under certain operat-
ing conditions.
The lamp should illuminate as a bulb and system check with the
ignition "ON" engine stationary. Once the engine is started, the lamp
should go out. If the lamp remains on, a malfunction has been
detected. If a malfunction occurs whilst driving, the lamp will illumi-
nate and a malfunction code will be recorded in the control unit mem-
ory. If the problem goes away, (e.g. intermittent), the lamp will not
come back on at the next restart. The malfunction code, however,
will be retained in the control unit memory.
The E.C.C.S. diagnostic system provides
3
modes of operation.
They are: 1. Diagnostic Mode
2. Field Service Mode
3. Clearing Mode
The E.C.C.S. system is provided with a diagnostic terminal to acti-
vate system diagnostics. Located near the E.C.M., the connector
may be accessed by removing eitherthe left or right hand side's trim
in front of the console.
Summary of E.C.M. lamp functions during normal operation.
Ignition
Switch
Position
ON
System
Operation OK
NO/YES
NO
YES
Engine
Condition
Stopped
Running
E.C.M. Lamp
Operation
ON
ON
OFF