2003 FORD MUSTANG instrument cluster

Pinpoint Tests
PINPOINT TEST A: NO COMMUNICATION WITH THE GENERIC
ELECTRONIC MODULE (GEM) inoperative —
rear,
convertible only z
Window regulator
motor.
z Driver window
regulator control
switch. Test G .
z The defrost system is
inoperative z
BJB fuse HTD BL
(30A).
z CJB fuse 23 (15A).
z Circuitry.
z Instrument cluster
module (ICM).
z Rear window
defrost switch.
z Heated rear
window grid. z
GO to Pinpoint Test H .
z The defrost system will not
shut off automatically z
Circuit.
z ICM.
z Rear window
defrost switch. z
GO to Pinpoint Test I .
Test Step Result / Action to Take
CAUTION: Use the correct probe adapter(s) when making measurements. Failure to
use the correct probe adapter(s) may damage the connector. A1 CHECK THE GENERIC ELECTRONIC MODULE (GEM)
POWER SUPPLY z
Key in OFF position.
z Disconnect: Generic Electronic Module (GEM) C201a.
z Disconnect: GEM C201b.
z Key in ON position.
z Using the following table, measure the voltage between the
GEM, harness side and ground.
z Are the voltages greater than 10 volts? Connector Pin Circuit
C201a 4 400 (LB/BK)
C201a 1 1006 (DG/WH)
C201b 2 1001 (WH/YE)
C201b 3 193 (YE/LG) Yes
GO to
A2 .
No
REPAIR the circuit(s) in
question. TEST the system
for normal operation. A2 CHECK THE GEM GROUND CIRCUIT 397 (BK/WH) FOR
OPEN z
Key in OFF position.
z Measure the resistance between the GEM C201b pin 4,
circuit 397 (BK/WH), harness side and ground. Yes
GO to
A3 .
No Klj . 6 ba
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PINPOINT TEST H: THE DEFROST SYSTEM IS INOPERATIVE G5 CHECK DRIVER WINDOW REGULATOR CONTROL SWITCH
z
Disconnect: Driver Window Regulator Control Switch C537.
z Carry out the driver window regulator control switch component test.
REFER to Wiring Diagrams Cell 149, Component Testing.
z Is the driver window regulator control switch OK? Yes
INSTALL a new
rear window
regulator motor.
REFER to
Motor —
Window Regulator,
Quarter in this
section. TEST the
system for normal
operation.
No
INSTALL a new
driver window
regulator control
switch. REFER to
Switch — Window
Regulator Control in
this section. TEST
the system for
normal operation. Test Step Result / Action to Take
H1 CHECK POWER TO INDICATOR LIGHT
z
Key in ON position.
z Depress the rear window defrost switch to ON.
z Is the rear window defrost switch indicator ON? Yes
GO to
H2 .
No
GO to H3 .
H2 CHECK CIRCUIT 186 (BR/LB) FOR AN OPEN
z
Key in OFF position.
z Disconnect: Heated Rear Window Relay.
z Disconnect: Heated Rear Window Grid Power Supply
Connector C402a.
z Measure the resistance between heated rear window relay,
circuit 186 (BN/LB), harness side and heated rear window
grid C402a, circuit 186 (BN/LB), harness side.
z Is the resistance less than 5 ohms? Yes
GO to
H7 .
No
REPAIR the circuit. TEST
the system for normal
operation. H3 CHECK THE DIAGNOSTIC TROUBLE CODES (DTCS)
z
Refer to the results from the previous instrument cluster
module (ICM) self- test.
z Was DTC B1343 retrieved? Yes
GO to
H4 . Klj . 25 ba
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PINPOINT TEST I: THE DEFROST SYSTEM WILL NOT SHUT OFF
AUTOMATICALLY caused by a loose or
corroded connector.
CLEAR the DTCs.
REPEAT the self-
test. Test Step Result / Action to Take
I1 CHECK CIRCUIT 727 (YE/BK)
z
Disconnect: Heated Rear Window Relay.
z Key in ON position.
z Depress the rear window defroster switch to OFF.
z Measure the resistance between heated rear window
relay pin 85, circuit 727 (YE/BK) , harness side and
ground.
z Is the resistance greater than 10,000 ohms? Yes
GO to
I3 .
No
GO to I2 .
I2 CHECK CIRCUIT 727 (YE/BK) FOR A SHORT TO
GROUND z
Key in OFF position.
z Measure the resistance between instrument cluster
module (ICM) C220a pin 10, circuit 727 (YE/BK) ,
harness side and ground.
z Is the resistance greater than 10,000 ohms? Yes
GO to
I4 .
No
REPAIR the circuit. TEST the
system for normal operation. I3 CHECK CIRCUIT 186 (BN/LB) FOR A SHORT TO POWER
z
Disconnect: Heated Rear Window Grid Power Supply
Connector C402a.
z Measure the voltage between heated rear window grid
C402a circuit 186 (BN/LB), harness side and ground. Yes
REPAIR the circuit. TEST the
system for normal operation.
No
INSTALL a new heated rear
window relay. TEST the
system for normal operation. Klj . 30 ba
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DESCRIPTION AND OPERATION
Instrument Panel
The instrument panel consists of the following components:
zinstrument cluster
z instrument panel finish panels
z audio unit
z A/C controls
z glove compartment door
z passenger air bag module
z glove compartment
z instrument panel steering column cover
z instrument panel reinforcement
z instrument panel defroster grille
SECTION 501-
12: Instrument Panel and Console 2003 Mustang Workshop Manual Klj . 1 ba
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z
If the driver safety belt is buckled while the warning indicator is illuminated and the reminder
chime is sounding, then the safety belt warning indicator and reminder chime turn off.
z If the driver safety belt is buckled before the ignition switch is turned to ON, then the safety belt
warning light will turn on for 3 seconds and then off. The indicator chime will remain off.
Belt Minder (if equipped)
The Belt Minder feature is a supplemental warning to the safety belt warning function. This feature
provides additional reminders to the driver that the driver's safety belt is unbuckled by intermittently
sounding a chime and illuminating the safety belt warning lamp in the instrument cluster.
Safety Belt Extension
A safety belt that is too short even when fully extended can be lengthened. The safety belt extension
(611C22) is available. This assembly will add approximately 20 cm (8 inches) to the length of the
safety belt. Use the safety belt extension only if the safety belt is too short when fully extended. Do not
use the safety belt extension to alter the fit of the shoulder belt across the torso. Safety belt extensions
are available at no cost from any authorized Ford or Lincoln- Mercury dealer.
Lower Anchors and Tethers for Children (LATCH)
The lower anchors and tethers for children (LATCH) system is a standarized and uniform attachment
system for installing child safety seats in passenger vehicles. LATCH- equipped child safety seats have
two lower attachments that connect to the vehicle portion of the LATCH system.
The vehicle portion of the system consists of two attachment points (6- mm wires) bolted to the floor
pan at both second row outboard seating positions. The attachment points protrude from the biteline
between the seat cushion and seat backrest.
If a child safety seat was in use during a collision, inspect the vehicle portion of the system for
damage. If any of the attachment points (6- mm wires) are damaged, a new one must be installed. See
the appropriate removal and installation procedure in this section for service.
Attaching Safety Seats with Tether Straps
Some manufacturers make child safety seats that include a tether strap that goes over the back of the
vehicle seat and attaches to an anchoring point. Other manufacturers offer the tether strap as an
accessory. Contact the manufacturer of the child safety seat for information about ordering a tether
strap. If... Then...
The driver's safety belt is not buckled
approximately 5 seconds after the safety
belt warning light has turned off... The Belt Minder feature is activated —
the safety belt
warning light illuminates and the warning chime sounds for
6 seconds every 30 seconds, repeating for approximately
5 minutes or until safety belt is buckled. The driver's safety belt is buckled while
the safety belt indicator light is
illuminated and the safety belt warning
chime is sounding... The Belt Minder feature will not activate.
The driver's safety belt is buckled before
the ignition switch is turned to the ON
position... The Belt Minder feature will not activate. Klj . 2 ba
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Driver Air Bag Module
The driver air bag module:
zis installed as an assembly.
z is mounted in the center of the steering wheel.
Clockspring
The clockspring: zis mounted on the steering column, behind the steering wheel.
z provides a continuous electrical path from the restraints control module (RCM) to the driver air
bag.
Passenger Air Bag Module
The passenger air bag module: zis installed as an assembly.
z is mounted in the RH side of the instrument panel.
Restraints Control Module (RCM)
The restraints control module (RCM) performs the following functions: zsignals the inflators to deploy the air bags in the event of a deployable crash.
z monitors the air bag supplemental restraint system (SRS) for faults.
z illuminates the air bag indicator if a fault is detected.
z flashes the air bag indicator to indicate the lamp fault code (LFC) detected.
z communicates through the data link connector (DLC) the current or historical diagnostic trouble
codes (DTCs).
z signals the generic electronic module (GEM) to activate a chime if the air bag indicator is not
available and another SRS fault exists.
NOTE: The safing sensor is internal to the RCM and is not repaired separately.
The RCM monitors the SRS for possible faults. If a fault is detected while the ignition switch is in the
RUN position, the RCM will illuminate the air bag indicator located in the instrument cluster.
When the ignition is cycled (turned off and then on), the air bag indicator will begin its prove out
sequence. During prove out the air bag indicator will illuminate for six seconds, go off for two seconds
and then, if a system fault exists, flash the two- digit LFC. The air bag indicator will flash the LFC five
times, then it will remain illuminated for the rest of the key cycle. The RCM will also communicate the Klj . 2 ba
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a
DTC: Diagnostic Trouble Code, retrieved using a scan tool.
b LFC: Lamp fault code, flashed on air bag indicator.
c Tone will sound only if additional DTCs are present.
Inspection and Verification 1. Verify the customer concern by checking the air bag indicator in the instrument cluster. Refer to Prove Out the System in this section.
2. Visually inspect for obvious signs of mechanical and electrical damage using the following chart:
3. If the concern is not visually evident, use the scan tool to retrieve diagnostic trouble codes (DTCs) and perform the on- demand self test.
4. WARNING: The restraint system diagnostic tool is for restraint system service only.
Remove from vehicle prior to road use. Failure to remove could result in injury and
possible violation of vehicle safety standards.
If the on- demand self test is passed and no DTCs are retrieved, GO to Symptom Chart .
5. If DTCs are retrieved, proceed to the Restraints Control Module (RCM) Diagnostic Trouble Code (DTC) Priority Table.
Symptom Chart — — — No Communication with the Restraints Control Module Go To Pinpoint
Test P .
Visual Inspection Chart Mechanical Electrical
z
Damaged restraints control module (RCM) bracket z
Open fuse(s)
z Damaged wiring harness
z Loose or corroded connectors
z Circuitry open/shorted Symptom Chart
Condition
Possible Sources Action
z Air bag warning indicator is
illuminated continuously z
Circuitry.
z Worn or damaged
connector component.
z RCM.
z Instrument cluster. z
Go To Pinpoint Test A .
z Air bag indicator flashing zAir bag SRS system
fault. z
REFER to DTC
Priority Table.
z Audible tone — DTCs
retrieved z
Air bag SRS system
fault. z
Go To Pinpoint Test N .
z Go To Pinpoint Test O .
z No communication with the zScan Tool. zGo To Pinpoint Klj . 4 ba
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z
Is the voltage between 9 and 16 volts? A5 CHECK THE GROUND CIRCUIT 397 (BK/WH) FOR AN OPEN
z
Key in OFF position.
z Measure the resistance between RCM C2041 pin 21, circuit 397
(BK/WH), harness side and a sheet metal ground near the RCM.
z Is the resistance less than 10 ohms? Yes
GO to
A6 .
No
REPAIR the
circuit. GO to A7 .
A6 CHECK CIRCUIT 608 (BK/YE) FOR A SHORT TO GROUND
z
Connect: RCM C2041.
z Disconnect: Instrument Cluster C220a.
z Measure the resistance to ground at instrument cluster C220a pin 12,
circuit 608 (BK/YE), harness side.
z Is the resistance less than 10,000 ohms? Yes
REPAIR the
circuit. GO to
A7 .
No
INSTALL a new
RCM. GO to A7 .
A7 CHECK FOR ADDITIONAL DTCs
z
Refer to the continuous DTCs recorded during Step A1.
z Were any continuous DTCs retrieved during Step A1? Yes
Do not clear any
DTCs until all
DTCs have been
resolved. GO to
the Restraints
Control Module
(RCM) Diagnostic
Trouble Code
(DTC) Priority
Table in this Klj . 4 ba
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