FORD MUSTANG 2003 Workshop Manual

REMOVAL AND INSTALLATION
Child Safety Seat Tether Anchor —
LATCH
Removal and Installation 1. Remove the lower anchors and tethers for children (LATCH) attachment fasteners.
2. Remove the LATCH attachment.
3. To install, reverse the removal procedure.
SECTION 501-
20A: Safety Belt System 2003 Mustang Workshop Manual Klj . 1 ba
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SPECIFICATIONS
SECTION 501-
20B: Supplemental Restraint System 2003 Mustang Workshop Manual Torque Specifications
Description Nm lb-
ft lb-
in Restraints control module bracket bolts 12 9 —
Driver air bag bolts 9 — 80
Passenger air bag bolts 9 — 80
Crash sensor grounding screw (N802455-
S190) Weld nut repair screw
(8 mm) 15 11 —
Grounding screw (6 mm) (N806327-
S190) 12 9 — Klj . 1 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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current and historical DTCs through the DLC, using a scan tool. If the air bag indicator does not
function, and the system detects a fault condition, the RCM will signal the GEM to activate an audible
chime. The chime is a series of five sets of five tone bursts. If the chime is heard, the SRS and the air
bag indicator require repair.
LFCs are prioritized. If two or more faults occur at the same time, the fault having the highest priority
will be displayed. After that fault has been corrected, the next highest priority fault will be displayed.
The RCM includes a backup power supply. This feature provides sufficient backup power to deploy the
air bags in the event that the ignition circuit is damaged in a collision before the safing and air bag
sensors determine that deployment is required. The backup power supply will deplete its stored energy
approximately one minute after the battery ground cable is disconnected.
Electrical System
The electrical system that supports the air bag supplemental restraint system (SRS):
zis powered from the battery through the ignition circuit.
z provides the electrical path from the restraints control module (RCM) to the air bag modules.
z provides the electrical path from the RCM to the air bag indicator.
z provides the electrical path from the RCM to the data link connector (DLC).
z provides the electrical path from the RCM to the generic electronic module (GEM).
Sensor WARNING: The restraints control module (RCM) orientation is critical for proper system
operation. If a vehicle equipped with an air bag supplemental restraint system (SRS) has been
involved in a collision in which the center tunnel area has been damaged, inspect the mounting
and bracket for deformation. If damaged, the RCM must be replaced whether or not the air bags
have deployed. In addition, make sure the area of the RCM mounting is restored to its original
condition.
The SRS contains two sensors which are integral to the RCM. The RCM is mounted on the center
tunnel under the instrument panel. Klj . 3 ba
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DIAGNOSIS AND TESTING
Air Bag Supplemental Restraint System (SRS)
Refer to Wiring Diagrams Cell
46 , Air Bag for schematic and connector information.
Restraint System Diagnostic Tool Warning WARNING: This 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.
Diagnosing Customer Concerns Without Hard DTCs
If a lamp fault code (LFC) is reported by the customer but is not present when the vehicle comes in for
service, follow the Diagnostic Instructions procedure in this section to identify the intermittent DTC.
Once the DTC is known, read the Normal Operation section of the pinpoint test for the DTC involved.
zFollow the deactivation procedure in this section.
z Determine the location of components involved in creating that code.
z Perform a thorough visual inspection of:
„components.
„ connectors.
„ splices and wiring harnesses.
„ pinched wires.
„ worn insulation on conductors.
Refer to the Possible Causes section of the pinpoint test for the DTC involved, which lists the common
concerns that relate to the DTC. Concerns are listed according to priority.
Diagnosing Customer Concerns with Hard DTCs
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. SECTION 501-
20B: Supplemental Restraint System 2003 Mustang Workshop Manual Special Tool(s)
Diagnostic Tool, Restraint
System
418-
F088 (105- R0012) Klj . 1 ba
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Most air bag supplemental restraint system (SRS) diagnostic procedures will require the use of the
deactivation and reactivation procedures in this section.
The deactivation and reactivation require the installation and removal of restraint system diagnostic
tools. These procedures require removal of driver air bag module, and the disconnection of the
passenger air bag module. This reduces the risk of deployment of air bag modules and safety belt
pretensioners while diagnostics are being carried out.
Restraint system diagnostic tools are required to carry out diagnosis and testing of the supplemental
restraint system (SRS). It is not acceptable to short-circuit the air bag module connections with a
jumper wire. If a jumper wire is used to short- circuit the air bag module connections, a lamp fault code
(LFC) will be displayed.
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.
The reactivation procedure requires the removal of any restraint system diagnostic tools installed and
the reconnection of any air bag modules disconnected.
Deactivation Procedure
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.
1. WARNING: To avoid accidental deployment and possible personal injury, the
backup power supply must be depleted before repairing or replacing any front or side air
bag supplemental restraint system (SRS) components and before servicing, replacing,
adjusting or striking components near the front or side air bag sensors, such as doors,
instrument panel, console, door latches, strikers, seats and hood latches.
Please refer to the appropriate vehicle shop manual to determine location of the front air
bag sensors.
The side air bag sensors are located at or near the base of the B- pillar. Klj . 2 ba
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To deplete the backup power supply energy, disconnect the battery ground cable and
wait at least one minute. Be sure to disconnect auxiliary batteries and power supplies (if
equipped).
Disconnect the battery ground cable. For additional information, refer to
Section 414 - 01 .
2. Wait at least one minute for the backup power supply in the restraints control module (RCM) to deplete its stored energy.
3. WARNING: Carry a live air bag module with the air bag and trim cover pointed away
from your body. This will reduce the risk of injury in the event of an accidental
deployment.
WARNING: Do not set an air bag module down with the trim cover face down. This
will reduce the risk of injury in the event of an accidental deployment.
Remove the driver air bag module from the vehicle. Refer to Driver Air Bag Module in this
section.
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.
Connect a restraint system diagnostic tool to the vehicle harness at the top of the steering
column.
5. Disconnect the passenger air bag module electrical connector.
6. 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.
Connect a restraint system diagnostic tool to the vehicle harness.
7. Reconnect the battery ground cable. For additional information, refer to Section 414 - 01 .
Reactivation Procedure 1. WARNING: The restraint system diagnostic tool 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.
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.
Disconnect the battery ground cable. Refer to Section 414 - 01 .
2. Wait at least one minute for the backup power supply in the restraints control module (RCM) to deplete its stored energy.
3. Remove the restraint system diagnostic tool from the vehicle harness connector at the top of the Klj . 3 ba
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steering column.
4. WARNING: Carry a live air bag module with the air bag and trim cover pointed away
from your body. This will reduce the risk of injury in the event of an accidental
deployment.
Install the driver air bag module. Refer to Driver Air Bag Module in this section.
5. 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.
Remove the restraint system diagnostic tool from the vehicle harness connector at the
passenger air bag module.
6. Connect the passenger air bag module electrical connector.
7. Reconnect the battery ground cable. For additional information, refer to Section 414 - 01 .
8. Prove out the system.
Prove Out Procedure
Turn the ignition switch from the OFF to the RUN position and visually monitor the air bag indicator
with the air bag modules or restraint system diagnostic tools installed. The air bag indicator will light
continuously for approximately six seconds and then turn off. If an air bag supplemental restraint
system (SRS) fault is present, the air bag indicator will either: zfail to light.
z remain lit continuously.
z flash.
The flashing might not occur until approximately 30 seconds after the ignition switch has been turned
from the OFF to the RUN position. This is the time required for the restraints control module (RCM) to
complete the testing of the SRS. If the air bag indicator is inoperative and an SRS fault exists, a chime
will sound in a pattern of five sets of five beeps. If this occurs, the air bag indicator will need to be
repaired before diagnosis can continue.
Glossary
Restraint System Diagnostic Tool
Restraint system diagnostic tools are used to simulate air bag module connections to the system.
Disconnect the Component
Disconnect the component means disconnect the component vehicle harness connector. It does not
mean remove the component. Do not reconnect a disconnected component unless instructed to do so. Deactivate the System Klj . 4 ba
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