413-01-3
413-01-3
Instrument Cluster
DIAGNOSIS AND TESTING (Continued)
Boost Gauge (Cobra only)
BRAKE Warning Indicator
The boost pressure gauge on the instrument cluster
The generic electronic module (GEM) receives the
receives and measures the boost pressure directly
parking brake status from the parking brake switch
from the intake manifold. The boost pressure gauge
and provides a ground to the instrument cluster
displays between 0.0 — 0.48 kpa (0.0-10 psi) boost
when the GEM detects the ignition switch in the
pressure, depending upon the accelerator position,
RUN state with the parking brake applied. The
the engine load, and the engine rpm.
instrument cluster receives the brake fluid level
status from the brake fluid level switch. The
LOW FUEL Level Indicator
BRAKE warning indicator turns on when the GEM
The low fuel level indicator is hardwired from the
provides a ground to the instrument cluster or when
fuel sender to the instrument cluster. The instrument
the brake fluid level switch grounds the input circuit
cluster illuminates the low fuel indicator when the
to the instrument cluster. The BRAKE warning
usable fuel quantity is less than 1/8 tank (15%) of
indicator proves out starting when the GEM detects
fuel tank capacity.
that the ignition circuits have made a transition to
RUN or START from OFF, ACC, or keyout and
Oil Pressure Gauge
ending when either 3 seconds have elapsed or when
The oil pressure gauge is hardwired from the oil
the GEM detects the ignition circuits have made a
pressure switch to the instrument cluster. The oil
transition to OFF, ACC, or keyout.
pressure gauge indicates either normal or no oil
Safety Belt Warning Indicator
pressure.
The safety belt switch is hardwired to the GEM.
CHECK FUEL CAP
The safety belt warning indicator illuminates when
The CHECK FUEL CAP indicator is used to
the GEM sends a ground signal to the instrument
indicate significant leaks in the fuel tank
cluster.
evaporative system due to a loose fuel cap. Fuel
Anti-Lock Brake System (ABS) Warning
tank pressure is monitored by the PCM. If a leak is
Indicator
detected the PCM signals a fault to the instrument
cluster via the SCP network. Once the PCM has
The ABS warning indicator illuminates when the
detected a loose fuel cap and the CHECK FUEL
anti-lock brake control module sends a ground
CAP indicator is illuminated, the indicator remains
signal to the instrument cluster. The prove-out of
illuminated until the fuel cap is secured and the
the ABS indicator is controlled by the anti-lock
vehicle has been running for several minutes. For
brake control module.
additional information, refer to the
Powertrain
SERVICE ENGINE SOON Indicator
Control/Emissions Diagnosis (PC/ED) manual
.
The SERVICE ENGINE SOON indicator receives
its signal from the PCM over the SCP network. If
the instrument cluster does not receive a message
from the PCM within 5 seconds, the instrument
cluster illuminates the SERVICE ENGINE SOON
indicator and log a diagnostic trouble code (DTC).
High Beam Indicator
The high beam indicator illuminates when the
steering column multifunction switch is in the high
beam position by sending a battery signal to the
instrument cluster.
Right and Left Turn Indicator
The right and left turn indicators illuminates when
the steering column multifunction switch is in either
turn signal position or the hazard lamps position by
sending a battery signal to the instrument cluster.
2003 Mustang, 8/2002
