2003 FORD MUSTANG belt

The boost pressure gauge on the instrument cluster receives and measures the boost pressure
directly from the intake manifold. The boost pressure gauge will display between 0.0-
0.48 kpa (0.0-10
psi) boost pressure dependent upon accelerator position, engine load, and engine rpm.
LOW FUEL Level Indicator
The low fuel level indicator is hardwired from the fuel sender to the instrument cluster. The instrument
cluster will illuminate the low fuel indicator when the usable fuel quantity is less than 1/8 tank (15%) of
fuel tank capacity.
Oil Pressure Gauge
The oil pressure gauge is hardwired from the oil pressure switch to the instrument cluster. The oil
pressure gauge will indicate either normal or no oil pressure.
CHECK FUEL CAP
The CHECK FUEL CAP indicator is used to indicate significant leaks in the fuel tank evaporative
system due to a loose fuel cap. Fuel tank pressure is monitored by the PCM. If a leak is detected the
PCM signals a fault to the instrument cluster via the SCP network. Once the PCM has detected a
loose fuel cap and the CHECK FUEL CAP indicator is illuminated, the indicator will remain illuminated
until the fuel cap is secured and the vehicle has been running for several minutes. For additional
information, refer to the Powertrain Control/Emissions Diagnosis (PC/ED) manual.
BRAKE Warning Indicator
The BRAKE warning indicator activates when the generic electronic module (GEM) detects the ignition
switch circuits are in the RUN state, when the GEM detects low brake fluid level, or that the parking
brake is applied. The BRAKE warning indicator will prove out starting when the GEM detects that the
ignition circuits have made a transition to RUN or START from OFF, ACC, or keyout and ending when
either three seconds have elapsed or when the GEM detects the ignition circuits have made a
transition to OFF, ACC, or keyout.
Safety Belt Warning Indicator
The safety belt switch is hardwired to the GEM. The safety belt warning indicator will be illuminated
when the GEM sends a ground signal to the instrument cluster.
ABS Warning Indicator
The ABS warning indicator will be illuminated when the anti- lock brake control module sends a ground
signal to the instrument cluster. The prove- out of the ABS indicator is controlled by the anti- lock brake
control module.
SERVICE ENGINE SOON Indicator
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 five seconds, the instrument
cluster will illuminate the SERVICE ENGINE SOON indicator and log a diagnostic trouble code (DTC).
High Beam Indicator
The high beam indicator will illuminate 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 Klj . 3 ba
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3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible)
before proceeding to the next step.
4. If the concern remains after the inspection, connect the diagnostic tool to the data link connector (DLC) located beneath the instrument panel and select the vehicle to be tested from the
diagnostic tool menu. If the diagnostic tool does not communicate with the vehicle:
zcheck that the program card is correctly installed.
z check the connections to the vehicle.
z check the ignition switch position.
5. If the diagnostic tool still does not power up, refer to the diagnostic tool operating manual.
6. Carry out the DATA LINK DIAGNOSTICS test. If the diagnostic tool responds with: zCKT914, CKT915 OR CKT70 = ALL ECUS NO RESP/NOT EQUIP, refer to Section 418 -
00 .
z NO RESP/NOT EQUIP for the instrument cluster, Go To Pinpoint Test A or for the
generic electronic module (GEM), Go To Pinpoint Test W .
z SYSTEM PASSED, retrieve and record the continuous diagnostic trouble codes (DTCs),
erase the continuous DTCs and carry out the self- test diagnostics for the instrument
cluster or the GEM.
7. If the DTCs retrieved are related to the concern, go to the Instrument Cluster Diagnostic Trouble Code (DTC) Index or the GEM Diagnostic Trouble Code Index to continue diagnostics.
8. If no DTCs related to the concern are retrieved, proceed to the Symptom Chart to continue diagnostics.
Instrument Cluster Self- Diagnostic Mode
To enter the instrument cluster self- diagnostic mode, press and hold the instrument cluster
SELECT/RESET button, turn the ignition switch to the RUN position, and then continue pressing the
SELECT/RESET button (five seconds) until tESt is displayed in the odometer. The SELECT/RESET
button must be released within three seconds of the odometer tESt display to begin the self- diagnostic
mode. Press the SELECT/RESET button to advance through the following steps until dtc is displayed.
Depressing the SELECT/RESET button will display any stored continuous DTCs before proceeding to
the next step. z
Engine coolant level
z Accessory drive belt
z Engine oil level
z Parking brake position switch
z Brake fluid level
z Boost gauge pressure line „
5 (15A)
„ 7 (15A)
„ 11 (15A)
„ 13 (15A)
„ 21 (5A)
„ 23 (15A)
„ 24 (30A)
„ 29 (15A)
„ 30 (15A)
„ 32 (15A)
„ 34 (20A)
„ 35 (15A)
„ 37 (5A)
„ 38 (20A)
„ 39 (5A)
z Circuitry Klj . 5 ba
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GEM Diagnostic Trouble Code (DTC) Index
DTC Description Source Action
B1218 Horn Relay Coil Circuit Short to
VBatt GEM REFER to
Section 501 - 14B .
B1312 Lamp Headlamp Input Circuit
Short to Battery GEM REFER to
Section 413 - 09 .
B1317 Battery Voltage High GEM REFER to
Section 414 - 00 .
B1318 Battery Voltage Low GEM REFER to
Section 414 - 00 .
B1322 Driver Door Ajar Circuit Short to
Ground GEM REFER to
Section 417 - 02 .
B1330 Passenger Door Ajar Circuit
Short to Ground GEM REFER to
Section 417 - 02 .
B1334 Decklid Ajar Rear Door Circuit
Short to Ground GEM REFER to
Section 417 - 02 .
B1339 Chime Input Request Circuit
Short to Battery GEM REFER to
Section 413 - 09 .
B1340 Chime Input Request Circuit
Short to Ground GEM REFER to
Section 413 - 09 .
B1342 ECU is Defective GEM Clear the DTCs. Retrieve the DTCs. If DTC B1342
is retrieved, INSTALL a new GEM. REFER to Section 419 - 10 .
B1353 Ignition Key-
In Circuit Open GEM REFER to
Section 413 - 09 .
B1359 Ignition Run/Acc Circuit Failure GEM REFER to
Section 211 - 05 .
B1396 Power Door Lock Circuit Short
to Battery GEM REFER to
Section 501 - 14B .
B1397 Power Door Unlock Circuit
Short to Battery GEM REFER to
Section 501 - 14B .
B1405 Driver Power Window Down
Circuit Short to Battery GEM REFER to
Section 501 - 11 .
B1408 Driver Power Window Up
Circuit Short to Battery GEM REFER to
Section 501 - 11 .
B1426 Lamp Safety Belt Circuit Short
to Battery GEM Go To Pinpoint Test K .
B1428 Lamp Safety Belt Circuit Failure GEM Go To Pinpoint Test K .
B1431 Wiper Brake/Run Relay Circuit
Failure GEM REFER to
Section 501 - 16 .
B1432 Wiper Brake/Run Relay Circuit
Short to Battery GEM REFER to
Section 501 - 16 .
B1434 Wiper Hi/Low Speed Relay Coil
Circuit Failure GEM REFER to
Section 501 - 16 .
B1436 Wiper Hi/Low Speed Relay Coil
Circuit Short to Battery GEM REFER to
Section 501 - 16 .
B1438 Wiper Mode Select Switch
Circuit Failure GEM REFER to
Section 501 - 16 .
B1441 Wiper Mode Select Switch
Circuit Short to Ground GEM REFER to
Section 501 - 16 . Klj . 8 ba
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Symptom Chart B1446 Wiper Park Sense Circuit
Failure GEM REFER to
Section 501 - 16 .
B1448 Wiper Park Sense Circuit Short
to Battery GEM REFER to
Section 501 - 16 .
B1450 Wiper Wash/Delay Switch
Circuit Failure GEM REFER to
Section 501 - 16 .
B1453 Wiper Wash/Delay Switch
Circuit Short to Ground GEM REFER to
Section 501 - 16 .
B1458 Wiper Washer Pump Motor
Relay Circuit Failure GEM REFER to
Section 501 - 16 .
B1460 Wiper Washer Pump Motor
Relay Coil Circuit Short to Battery GEM REFER to
Section 501 - 16 .
B1462 Safety Belt Switch Circuit
Failure GEM REFER to
Section 413 - 09 .
B1466 Wiper Hi/Low Speed Not
Switching GEM REFER to
Section 501 - 16 .
B1473 Wiper Low Speed Circuit Motor
Failure GEM REFER to
Section 501 - 16 .
B1476 Wiper High Speed Circuit Motor
Failure GEM REFER to
Section 501 - 16 .
B1551 Decklid Release Circuit Failure GEM REFER to
Section 501 - 14B .
B1553 Decklid Release Circuit Short to
Battery GEM REFER to
Section 501 - 14B .
B1555 Ignition Run/Start Circuit
Failure GEM REFER to
Section 211 - 05 .
B1687 Lamp Dome Input Circuit Short
to Battery GEM REFER to
Section 417 - 02 .
B2486 Parklamp Output Relay Driver
Circuit Failure GEM REFER to
Section 419 - 01 .
B2488 Parklamp Output Relay Driver
Short to Battery GEM REFER to
C1189 Brake Fluid Level Sensor Input
Short Circuit to Ground GEM Go To Pinpoint Test O .
C1223 Lamp Brake Warning Output
Circuit Failure GEM Go To Pinpoint Test O .
C1225 Lamp Brake Warning Output
Circuit Short to Battery GEM Go To Pinpoint Test O .
Symptom Chart Condition
Possible Sources Action
z No communication with
the generic electronic
module (GEM) z
Central junction
box (CJB) fuse
(s):
„7 (15A).
„ 39 (5A).
„ 43 z
Go To Pinpoint Test W Klj . 9 ba
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indication—
Cobra only zInstrument
cluster.
z The LOW FUEL warning
indicator is never/always
on z
LOW FUEL
warning
indicator bulb.
z Standard
corporate
protocol (SCP)
network.
z Instrument
cluster. z
Go To Pinpoint Test H .
z Oil gauge reads normal
with engine off z
Instrument
cluster. z
INSTALL a new instrument
cluster. REFER to
Instrument Cluster in this
section. TEST the system
for normal operation.
z The speedometer is
inoperative z
Standard
corporate
protocol (SCP)
network.
z Powertrain
control module
(PCM).
z Instrument
cluster. z
Go To Pinpoint Test I .
z The odometer is
inoperative z
Circuitry.
z Powertrain
control module
(PCM).
z Instrument
cluster. z
Go To Pinpoint Test J .
z The safety belt warning
indicator is inoperative
(chime is
operative)/does not
operate correctly z
Circuitry.
z Generic
electronic
module (GEM).
z Instrument
cluster. z
Go To Pinpoint Test K .
z Inaccurate speedometer
reading z
Instrument
cluster.
z Powertrain
control module
(PCM). z
Go To Pinpoint Test L .
z The O/D OFF indicator
is never on z
Circuitry.
z O/D cancel
switch.
z O/D OFF
indicator bulb.
z Standard
corporate
protocol (SCP)
network.
z Powertrain
control module
(PCM).
z Instrument
cluster. z
Go To Pinpoint Test M .
z The O/D OFF indicator
is always on z
Circuitry.
z O/D cancel
switch. z
REFER to the Powertrain
Control/Emissions
Diagnosis (PC/ED) Klj . 11 ba
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PINPOINT TEST J: THE ODOMETER IS INOPERATIVE
PINPOINT TEST K: THE SAFETY BELT INDICATOR IS INOPERATIVE
(CHIME IS OPERATIVE)/DOES NOT OPERATE CORRECTLY GO to
I2 .
I2 CHECK FOR CORRECT
INSTRUMENT CLUSTER
OPERATION z
Disconnect all instrument cluster
connectors.
z Check for:
zcorrosion
z pushed- out pins
z Connect all instrument cluster
connectors and make sure they
seat correctly.
z Operate the system and verify
the concern is still present.
z Is the concern still present? Yes
INSTALL a new instrument cluster. REFER to
Instrument Cluster
in this section. TEST the system for
normal operation.
No
The system is operating correctly at this time. Concern
may have been caused by a loose or corroded
connector. CLEAR the DTCs. REPEAT the self- test. Test Step Result / Action to Take
J1 CHECK THE ODOMETER
DISPLAY z
Key in ON position.
z Is the odometer displaying all
dashes? Yes
REFER to the Powertrain Control/Emissions Diagnosis
(PC/ED) manual.
No
GO to
J2 .
J2 CHECK FOR CORRECT
INSTRUMENT CLUSTER
OPERATION z
Disconnect all instrument cluster
connectors.
z Check for:
zcorrosion
z pushed- out pins
z Connect all instrument cluster
connectors and make sure they
seat correctly.
z Operate the system and verify
the concern is still present.
z Is the concern still present? Yes
INSTALL a new instrument cluster. REFER to
Instrument Cluster
in this section. TEST the system for
normal operation.
No
The system is operating correctly at this time. Concern
may have been caused by a loose or corroded
connector. CLEAR the DTCs. REPEAT the self- test. Test Step Result / Action to Take
K1 CHECK IF THE GEM IS RECEIVING THE CORRECT
IGNITION SWITCH STATUS CAUTION: Use the correct probe adapter(s) when
making measurements. Failure to use the correct probe
adapter(s) may damage the connector.
z Connect the diagnostic tool. Yes
GO to
K2 .
No
REFER to Section 211 - 05 . Klj . 23 ba
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z
Key in ON position.
z Enter the following diagnostic mode on the diagnostic tool:
Generic Electronic Module (GEM) PID.
z Monitor the GEM PIDs IGN_KEY, IGN_S, IGN_R, and
IGN_A, while inserting the ignition key and cycling the
ignition switch through all the positions.
z Did the PIDs agree with the ignition switch positions? K2 CHECK IF THE GEM IS RECEIVING THE CORRECT
SAFETY BELT SWITCH STATUS z
Monitor GEM PID D_SBELT while buckling and unbuckling
the driver safety belt.
z Did the PID display IN with the safety belt buckled and
OUT with the safety belt unbuckled? Yes
GO to
K3 .
No
REFER to Section 413 - 09 .
K3 CHECK THE GEM FOR INTERNAL OPEN OR SHORT
z
Key in OFF position.
z Monitor the safety belt warning indicator when turning the
ignition from the OFF to the ON position.
z Key in ON position.
z Did the safety belt warning indicator illuminate for
approximately three seconds and turn off? Yes
GO to
K10 .
No
GO to K4 .
K4 DETERMINE IF SAFETY BELT INDICATOR CIRCUIT IS
SHORTED TO GROUND z
Buckle the driver safety belt.
z Is the safety belt indicator always on? Yes
GO to
K5 .
No
GO to K7 .
K5 CHECK IF THE GEM IS INTERNALLY GROUNDED
z
Key in OFF position.
z Disconnect: GEM C201e.
z Key in ON position.
z Observe the safety belt warning indicator.
z Is the safety belt warning indicator always on? Yes
GO to
K6 .
No
GO to K10 .
K6 CHECK CIRCUIT 450 (DG/LG) FOR A SHORT TO GROUND
z
Key in OFF position.
z Disconnect: Instrument Cluster C220a.
z Measure the resistance between the GEM C201e pin 26,
circuit 450 (DG/LG), harness side and ground.
z Is the resistance greater than 10,000 ohms? Yes
GO to
K11 .
No
REPAIR the circuit. TEST
the system for normal
operation. K7 CHECK CIRCUIT 450 (DG/LG) FOR A SHORT TO
BATTERY z
Key in OFF position.
z Disconnect: GEM C201e.
z Disconnect: Instrument Cluster C220a. Yes
REPAIR the circuit. TEST
the system for normal Klj . 24 ba
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z
Measure the voltage between the GEM C201e pin 26,
circuit 450 (DG/LG), harness side and ground.
z Is any voltage present? operation.
No
GO to
K8 .
K8 CHECK THE GEM MODULE FOR AN INTERNAL OPEN
z
Connect: Instrument Cluster C220a.
z Install a fused (10A) jumper wire between the GEM C201e
pin 26, circuit 450 (DG/LG), harness side and ground.
z Key in ON position.
z Did the safety belt indicator illuminate? Yes
GO to
K10 .
No
GO to K9 .
K9 CHECK CIRCUIT 450 (DG/LG) FOR AN OPEN
z
Key in OFF position.
z Disconnect: Instrument Cluster C220a.
z Measure the resistance between the GEM C201e pin 26,
circuit 450 (DG/LG), harness side and instrument cluster
C220a pin 4, circuit 450 (DG/LG), harness side.
z Is the resistance less than 5 ohms? Yes
GO to
K11 .
No
REPAIR the circuit. TEST
the system for normal
operation. K10 CHECK FOR CORRECT GEM OPERATION
z
Disconnect all GEM connectors.
z Check for:
zcorrosion
z pushed- out pins
z Connect all GEM connectors and make sure they seat
correctly.
z Operate the system and verify the concern is still present.
z Is the concern still present? Yes
INSTALL a new GEM.
REFER to
Section 419 - 10 .
TEST the system for normal
operation.
No
The system is operating
correctly at this time. Klj . 25 ba
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