lock FORD MUSTANG 2003 Workshop Manual

DESCRIPTION AND OPERATION
Safety Belt System
WARNING: All safety belt assemblies include retractors, buckles, front seat belt buckle
support assemblies (slide bar, if so equipped), shoulder belt height adjuster (if equipped), child
safety seat tether bracket assemblies (if equipped) and attaching hardware should be inspected
after any collision. Ford recommends new safety belt assemblies be installed unless a qualified
technician finds the assemblies show no damage and operate correctly. Safety belt assemblies
not in use during a collision should also be inspected and new assemblies installed if either
damage or incorrect operation is noted.
WARNING: Each seating position in the vehicle has a specific safety belt assembly which
consists of one buckle and one tongue. The safety belt assembly is designed to be used as a
pair and is not to be used across seating positions.
A continuous- loop, single retractor active restraint system is used on this vehicle for both the front
seats and the rear seats.
Safety Belt, Lap/Shoulder— Dual Locking Mode
WARNING: Rear- facing infant seats should never be placed in the front seats. Failure to
follow these instructions may result in personal injury.
The dual locking mode retractor on the shoulder belt portion of the combination lap/shoulder safety belt
for the front seat passenger and rear seat outboard passengers operates in two ways:
1. In the vehicle- sensitive (emergency locking) mode, the shoulder belt retractor will allow the
occupant freedom of movement, locking tightly only on hard braking, hard cornering or impacts
of approximately 8 km/h (5 mph) or more. The front and rear outboard safety belt retractors can
also be made to lock by pulling/jerking on the belt.
2. In the automatic locking mode, the shoulder belt retractor locks automatically and remains locked when the combination lap/shoulder safety belt is buckled, restricting occupant
movement. This mode provides tight lap/shoulder belt fit on the occupant and on a child safety
seat or infant carrier installation restraint.
When the combination lap/shoulder belt is unbuckled and allowed to retract completely, the retractor
switches to the vehicle sensitive (emergency) locking mode.
The automatic locking mode must be used when installing a child safety seat on the front passenger
seat and rear outboard seats where dual locking retractors are provided.
Safety Belt Warning System
The safety belt warning indicator illuminates and a chime sounds to remind the occupants to fasten
their safety belts.
The conditions of operation for the safety belt warning indicator and chime are as follows:
zIf the driver safety belt is not buckled before the ignition switch is turned to ON, then the safety
belt warning indicator illuminates for one to two minutes and the warning chime sounds for four
to eight seconds.
SECTION 501-
20A: Safety Belt System 2003 Mustang Workshop Manual Klj . 1 ba
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Functional Test III (System Road Test Inspection)
1. NOTE: If the RH or the rear safety belts are to be tested, the assistance of a passenger is
required.
Fasten the safety belts and proceed to a safe area.
2. Attain a speed of 8 km/h (5 mph).
3. WARNING: The driver and passenger must be prepared to brace themselves if the
retractor does not lock.
Test the safety belts. 1. Grasp the shoulder harness and prepare to lean forward.
2. WARNING: The maximum brake application should be on dry concrete or
equivalent hard surface, NEVER on wet pavement or gravel.
WARNING: The driver and passenger must be prepared to brace themselves
in the event the retractor does not lock.
Make a maximum brake application without a skid.
3. NOTE: Do not jerk on the safety belt webbing when carrying out this test. Lean forward slightly when the brake application is made.
4. The safety belts should lock up with minimum webbing extension.
5. If there is a lockup of both shoulder straps, the safety belt assemblies are functioning correctly. Should either or both retractors fail to lock up at the 8 km/h (5 mph) speed, repeat the test at a
constant 24 km/h (15 mph) speed. (This test must be carried out with the assistance of a RH
front or rear passenger if the RH front or rear safety belts are to be tested).
6. CAUTION: Before installing a new safety belt assembly, inspect the mounting area
for damage and distortion. If the retractor of a new safety belt assembly has been bolted
into a damaged or distorted mounting area, the retractor could be warped and may not
function. If this is the case, remove the retractor and return the sheet metal to the
original configuration and install another complete safety belt assembly.
If the retractors do not lock up at the 24 km/h (15 mph) test, return the vehicle for service of
malfunctioning safety belts.
Functional Test IV (Automatic Locking Retractor) WARNING: After any vehicle collision, the safety belt system at all outboard seating
positions (except driver, which has no "automatic locking retractor" feature) must be checked
by a qualified technician to verify that the "automatic locking" feature for child seats is still
functioning correctly, in addition to other checks for correct safety belt system function. A new
safety belt and retractor assembly must be installed if the safety belt assembly's "automatic
locking retractor" feature or any other safety belt function is not operating correctly when
checked according to the procedures in the workshop manual. Failure to install a new safety
belt and retractor assembly could increase the risk of injury in collisions.
1. Position the seat back into the full up position. Klj . 3 ba
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2. Position the height adjuster in the full down or up position.
3. Latch the seat belt buckle and tongue assembly.
4. Pull the shoulder belt out until the automatic locking retractor (ALR) feature is activated.
5. Release the shoulder belt and allow it to retract until it stops.
6. Pull on the shoulder belt to check that the belt has remained in the ALR mode. If the belt is not
locked, install a new safety belt and retractor assembly.
7. Unlatch the safety belt tongue from the buckle and allow the safety belt to retract to its stowed position.
8. Pull the shoulder belt to verify the retractor assembly has converted automatically out of the ALR mode. If the shoulder belt remains locked in the stowed position, install a new safety belt
and retractor assembly. Klj . 4 ba
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DESCRIPTION AND OPERATION
Air Bag Supplemental Restraint System (SRS)
The air bag supplemental restraint system (SRS) is designed to provide increased collision protection
for front seat occupants in addition to that provided by the three-
point safety belt system. Safety belt
use is necessary to obtain the best occupant protection and to receive the full advantages of the SRS.
The air bag supplemental restraint system (SRS) components are shown in the following illustration.
Air Bag Supplemental Restraint System (SRS) Components SECTION 501-
20B: Supplemental Restraint System 2003 Mustang Workshop Manual Item Part Number Description
1 044A74 Passenger air bag module
2 14B321 Restraints control module (RCM)
3 043B13 Driver air bag module
4 14A664 Clockspring Klj . 1 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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An air bag indicator that is illuminated continuously can be caused by one of the following:
zworn or damaged shorting bar or camming beam.
z the ignition circuit damaged.
z the RCM disconnected from the vehicle harness.
z a loss of RCM ground circuits.
z the RCM inoperative.
z circuitry.
PINPOINT TEST A: THE AIR BAG WARNING INDICATOR IS
ILLUMINATED CONTINUOUSLY — RCM DISCONNECTED,
INOPERATIVE, OR LOST/LOW IGNITION FEED Test Step Result / Action to
Take A1 CHECK FOR CONTINUOUS OR ON-
DEMAND SELF TEST DTCs z
Key in OFF position.
z Connect the diagnostic tool. Scan Tool
z Key in ON position.
z Enter the following diagnostic mode on the diagnostic tool:
Retrieve/Clear Continuous DTCs.
z Retrieve and record any continuous DTCs for use later in this pinpoint
test.
z Enter the following diagnostic mode on the diagnostic tool: On-
Demand Self Test.
z Were any continuous or on- demand self test DTCs retrieved? Yes
If continuous
DTCs were
retrieved, GO to
A3
. If on-
demand
DTCs were
retrieved, GO to
the Restraints
Control Module
(RCM) Diagnostic
Trouble Code
(DTC) Priority
Table in this
section for
pinpoint test
direction.
No
GO to A2 .
A2 CHECK THE RCM CONNECTION
WARNING: If the supplemental restraint system (SRS) is
being serviced, the system must be deactivated and restraint
system diagnostic tools must be installed. Refer to Air Bag Supplemental Restraint System (SRS) in this section.
The air bag restraint system diagnostic tools must be removed
and the air bag modules reconnected when the system is
reactivated to avoid non- deployment in a collision, resulting in
possible personal injury. NOTE: Diagnostics or repairs are not to
be performed on a seat equipped with a seat side air bag with the
seat in the vehicle. Prior to attempting to diagnose or repair a seat
concern when equipped with a seat side air bag, the seat must be
removed from the vehicle and the restraint system diagnostic tools
must be installed in the seat side air bag electrical connectors. The
restraint system diagnostic tools must be removed prior to
operating the vehicle over the road. NOTE: After diagnosing or Yes
GO to
A3 .
No
CONNECT C2041
and engage the
locking tabs. GO
to A7 . Klj . 2 ba
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repairing an SRS,
the restraint system diagnostic tools must be
removed before operating the vehicle over the road. NOTE: After
diagnosing or repairing a seat system, the restraint system
diagnostic tools must be removed before operating the vehicle
over the road. NOTE: The SRS must be fully operational and free of
faults before releasing the vehicle to the customer.
z Key in OFF position.
z Deactivate the system. Refer to Air Bag Supplemental Restraint System (SRS) in this section.
z Key in OFF position.
z Connect: RCM C2041.
z Make sure RCM C2041 is fully connected and the red locking tab is
engaged.
z Is RCM C2041 fully connected and are the red locking tabs
engaged? A3 CHECK THE RCM CONNECTOR
z
Key in OFF position.
z Disconnect: RCM C2041.
z Inspect C2041 component side for a worn, or damaged camming
beam. Inspect for foreign material.
z NOTE: The shorting bars can be accessed by prying out the blue
cover from the harness side of the connector.
z Inspect C2041 harness side for worn, damaged, or dislodged shorting
bar at pins 20 and 21. Inspect for foreign material.
z Were any connector concerns found? Yes
CORRECT
connector
concerns. GO to
A7
.
No
GO to A4 .
A4 CHECK THE IGNITION CIRCUIT 611 (WH/OG) FOR AN OPEN
z
Key in ON position.
z Measure the voltage between RCM C2041 pin 2, circuit 611
(WH/OG), harness side and ground. Yes
GO to
A5 .
No
REPAIR the
circuit. GO to A7 . Klj . 3 ba
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Pinpoint Test D: LFC 15/DTC B 1887—
Driver Air Bag Circuit Shorted to Ground
Normal Operation
The restraints control module (RCM) checks for driver air bag circuit shorts to ground by monitoring the
voltage of circuits 614 (GY/OG) and 615 (GY/WH) at pins 3 and 4. If the RCM detects a short to
ground on either of these pins, it will store a diagnostic trouble code (DTC) B1887 in memory and flash
a lamp fault code (LFC) 15 (or higher priority code if one exists) on the air bag indicator.
Possible Causes
A driver air bag circuit short to ground can be caused by:
za short to ground on circuit 614 (GY/OG).
z a short to ground on circuit 615 (GY/WH).
z a short to ground on the clockspring (14A664).
z a short to ground on the driver air bag module.
z an RCM internal concern.
PINPOINT TEST D: LFC 15/DTC B1887 — DRIVER AIR BAG CIRCUIT
SHORTED TO GROUND system. PROVE
OUT the system.
REFER to
Air Bag Supplemental
Restraint System
(SRS) in this
section. CLEAR
all DTCs. Test Step Result / Action to
Take D1 CHECK FOR A HARD OR INTERMITTENT DTC
z
Key in OFF position.
z Connect the diagnostic tool. Scan Tool
z Key in ON position.
z Enter the following diagnostic mode on the diagnostic tool:
Retrieve/Clear Continuous DTCs.
z Retrieve and record any continuous DTCs for use later in this
pinpoint test.
z Enter the following diagnostic mode on the diagnostic tool: On-
Demand Self Test.
z Was DTC B1887 retrieved during the on- demand self test? Yes
This is a hard fault.
The fault condition
is still present. This
fault cannot be
cleared until it is
corrected and the
DTC is no longer
retrieved during the
on-
demand self
test. GO to D2 .
No
This is an
intermittent fault.
The fault condition
is not present at
this time. GO to
D5 . Klj . 10 ba
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D2 CHECK THE DRIVER AIR BAG MODULE
WARNING: If the supplemental restraint system (SRS) is
being serviced, the system must be deactivated and restraint
system diagnostic tools must be installed. Refer to Air Bag Supplemental Restraint System (SRS) in this section.
The air bag restraint system diagnostic tools must be removed
and the air bag modules reconnected when the system is
reactivated to avoid non- deployment in a collision, resulting in
possible personal injury. NOTE: Diagnostics or repairs are not to
be performed on a seat equipped with a seat side air bag with the
seat in the vehicle. Prior to attempting to diagnose or repair a seat
concern when equipped with a seat side air bag, the seat must be
removed from the vehicle and the restraint system diagnostic tools
must be installed in the seat side air bag electrical connectors. The
restraint system diagnostic tools must be removed prior to
operating the vehicle over the road. NOTE: After diagnosing or
repairing an SRS, the restraint system diagnostic tools must be
removed before operating the vehicle over the road. NOTE:
After diagnosing or repairing a seat system, the restraint system
diagnostic tools must be removed before operating the vehicle
over the road. NOTE: The SRS must be fully operational and free
of faults before releasing the vehicle to the customer.
z Key in OFF position.
z Deactivate the system. Refer to Air Bag Supplemental Restraint System (SRS) in the Diagnosis and Testing portion of this section.
z Key in OFF position.
z Key in ON position.
z Enter the following diagnostic mode on the diagnostic tool: On-
Demand Self Test.
z Was DTC B1887 retrieved? Yes
GO to
D3 .
No
INSTALL a new
driver air bag
module. GO to D6 .
D3 CHECK THE DRIVER AIR BAG MODULE CIRCUIT
z
Key in OFF position.
z Disconnect: RCM C2041.
z NOTE: Do not separate or remove shorting bars from RCM C2041.
z Measure the resistance between RCM C2041 pin 3, circuit 614
(GY/OG), harness side and RCM C2041 pin 21, circuit 397
(BK/WH), harness side.
z Is the resistance less than 10,000 ohms? Yes
GO to
D4 .
No
INSTALL a new
RCM. GO to D6 .
D4 CHECK THE DRIVER AIR BAG MODULE WIRING AND THE
CLOCKSPRING z
Disconnect: Driver Air Bag Module C216.
z Disconnect: Clockspring C218b.
z Inspect all crimps, terminals, wires and connectors in circuit 614
(GY/OG) feeding the RCM pin 3, circuit 615 (GY/WH) feeding pin 4,
the clockspring C218b. Check for pinched wires and damaged
connector pin terminals.
z Was any damage found? Yes
REPAIR as
necessary. GO to
D6
.
No
GO to D6 . Klj . 11 ba
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Pinpoint Test E: LFC 15/DTC B1916 —
Driver Air Bag Circuit Shorted to Battery or Ignition
Normal Operation
The restraints control module (RCM) checks for driver air bag circuit shorts to battery or ignition by
monitoring the voltage of circuit 614 (GY/OG) and 615 (GY/WH) at pins 3 and 4. If the RCM detects a
short to battery or ignition on either of these pins, it will store a diagnostic trouble code (DTC) B1916 in
memory and flash a lamp fault code (LFC) 15 (or higher priority code if one exists) on the air bag
indicator.
Possible Causes D5 CHECK FOR AN INTERMITTENT FAULT
z
Refer to the continuous DTCs recorded during Step D1.
z Was the continuous DTC retrieved during Step D1 an
intermittent fault? Yes
CHECK for causes
of intermittent short
to ground on circuit
614 (GY/OG),
circuit 615
(GY/WH), and the
clockspring
assembly. Attempt
to recreate the hard
fault by flexing the
wire harness and
cycling the ignition
key frequently.
REPAIR any
intermittent
concerns found.
GO to
D6 .
No
GO to D6 .
D6 CHECK FOR ADDITIONAL DTCs
z
Refer to continuous DTCs recorded during Step D1.
z Were any continuous DTCs retrieved during Step D1? 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 section
for pinpoint test
direction.
No
RECONNECT the
system.
REACTIVATE the
system. PROVE
OUT the system.
REFER to
Air Bag Supplemental
Restraint System
(SRS) in this
section. CLEAR all
DTCs. Klj . 12 ba
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