battery FORD MUSTANG 2003 Workshop Manual

circuit, it will store a diagnostic trouble code (DTC) B1870 in memory.
If the RCM detects an air bag indicator failure in addition to another SRS failure, the RCM will send a
signal to the generic electronic module (GEM) to produce five sets of five tone bursts.
Possible Causes
An air bag indicator short to battery condition can be caused by:
zdamaged wiring on circuit 608 (BK/YE).
z an instrument cluster malfunction.
z an RCM internal concern.
PINPOINT TEST O: DTC B1870 — AIR BAG INDICATOR SHORTED
TO BATTERY Test Step Result / Action to
Take O1 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 B1870 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
O2 .
No
This is an
intermittent fault.
The fault condition
is not present at
this time. GO to
O4 .
O2 CHECK THE AIR BAG INDICATOR CIRCUIT
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 Yes
INSTALL a new
RCM. GO to
O5 .
No
GO to O3 . Klj . 41 ba
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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 Disconnect: RCM C2041.
z Key in ON position.
z Is the air bag indicator illuminated? O3 CHECK AIR BAG INDICATOR CIRCUIT FOR SHORT TO BATTERY
z
Key in OFF position.
z Disconnect: RCM C2041.
z Disconnect: Instrument Cluster C220a.
z Key in ON position.
z Measure the voltage between RCM C2041 pin 20, circuit 608
(BK/YE), harness side and ground.
z Is the voltage less than 0.2 volt? Yes
REPAIR the
instrument cluster.
GO to
O5 .
No
REPAIR the
circuit. GO to O5 .
O4 CHECK FOR AN INTERMITTENT FAULT
z
Refer to the continuous DTCs recorded during Step O1.
z Was the continuous DTC retrieved during Step O1 an
intermittent fault? Yes
CHECK for causes
of intermittent
short to battery on
circuit 608
(BK/YE). Attempt
to recreate the
hard fault by
flexing the wire
harness and
cycling the ignition
key frequently.
REPAIR any
intermittent
concerns found.
GO to
O5 .
No
GO to O5 .
O5 CHECK FOR ADDITIONAL DTCs
z
Refer to the continuous DTCs recorded during Step O1.
z Were any continuous DTCs retrieved during Step O1? Yes
Do not clear any
DTCs until all
DTCs have been Klj . 42 ba
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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 Disconnect: RCM C2041.
z Inspect RCM C2041, harness side and RCM C2041, component
side, pin 5 for damage.
z Are RCM C2041 and RCM C2041 pin 5 OK? REACTIVATE the
system.
P2 CHECK THE DLC CONNECTOR C251 AND CONNECTOR PIN 7
FOR DAMAGE z
Inspect DLC C251 and DLC C251 pin 7 for damage.
z Are DLC C251 and DLC C251 pin 7 OK? Yes
GO to
P3 .
No
REPAIR DLC C251
or DLC C251 pin 7
as necessary.
RETEST the
communication to
RCM.
RECONNECT the
system.
REACTIVATE the
system. PROVE
OUT the system.
REFER to Air Bag Supplemental
Restraint System
(SRS) in this
section. P3 CHECK CIRCUIT 70 (LB/WH) FOR SHORT TO BATTERY
z
Measure the voltage to ground at DLC C251 pin 7, circuit 70
(LB/WH).
z Can any voltage be measured? Yes
REPAIR the battery
short. RETEST the
communication to
RCM.
RECONNECT the
system.
REACTIVATE the
system. PROVE
OUT the system.
REFER to
Air Bag Supplemental
Restraint System
(SRS) in this
section. Klj . 44 ba
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4. Place the air bag module on a flat surface in an open outdoor area with the trim cover facing
upward.
5. Remain at least 6.1 meters (20 feet) away from the air bag module.
6. Deploy the air bag module by touching the other ends of the two wires to the terminals of a 12– volt battery.
7. To allow for cooling, wait at least ten minutes before approaching the deployed air bag.
8. Dispose of the deployed air bag module in the same manner as any other part to be scrapped. Klj . 2 ba
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4. Place the air bag module on a flat surface in an open outdoor area with the deflector can facing
downward.
5. Remain at least 6.1 meters (20 feet) away from the air bag module.
6. Deploy the air bag module by touching the other ends of the two wires to the terminals of a 12– volt battery.
7. To allow for cooling, wait at least ten minutes before approaching the deployed air bag.
8. Dispose of the deployed air bag module in the same manner as any other part to be scrapped. Klj . 2 ba
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NOTE:
If a seat equipped with a seat mounted side air bag and/or a safety belt pretensioner (if
equipped) system is being serviced, the air bag system must be deactivated.
NOTE: Restraint system diagnostic tools MUST be installed under the seats in the seat side air bag (if
equipped) and safety belt pretensioner (if equipped) to floor connectors.
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.
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 and wait at least one minute. For additional information,
refer to Section 414 - 01 .
2. Remove the steering column opening lower finish panel. 1. Remove the screws.
2. Pull out to release the retaining clips and remove the steering column opening lower finish panel.
3. Remove the steering column opening lower reinforcement. 1. Remove the bolts.
2. Remove the steering column opening lower reinforcement. Klj . 2 ba
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z
Remove the two screws retaining the duct to the A/C register.
z Separate the A/C duct at the air plenum and remove the duct.
8. Disconnect the passenger air bag module.
9. Attach the restraint system diagnostic tool to the vehicle harness side of the passenger air bag electrical connector.
10. Connect the battery ground cable. For additional information, refer to Section 414 - 01 .
11. With the restraint system diagnostic tools installed at all deployable devices, prove out the supplemental restraint system (SRS). For additional information, refer to Air Bag Supplemental Restraint System (SRS) in the Diagnosis and Testing portion of this section.
12. Disconnect the battery ground cable and wait at least one minute. For additional information, refer to Section 414 - 01 .
Reactivation WARNING: To reduce the risk of serious personal injury, read and follow all warnings,
cautions, and notes at the beginning of the deactivation procedure.
1. Disconnect the battery ground cable and wait at least one minute. For additional information, refer to Section 414 - 01 .
2. Remove the restraint system diagnostic tool from the passenger air bag module electrical connector. Klj . 4 ba
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8. Install the steering column opening lower reinforcement.
1. Position the steering column opening lower reinforcement.
2. Install the bolts.
9. Install the steering column opening lower finish panel. 1. Align the steering column opening lower finish panel and push in, seating the retaining clips.
2. Install the screws.
10. Connect the battery ground cable. For additional information, refer to Section 414 - 01 .
11. 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.
With all the restraint system diagnostic tools removed, prove out the supplemental restraint
system (SRS). For additional information, refer to Air Bag Supplemental Restraint System (SRS) in the Diagnosis and Testing portion of this section. Klj . 6 ba
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GENERAL PROCEDURES
Weld Nut Repair
—"J" Nut, Restraints Control Module
(RCM)
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.
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).
NOTE: There are two procedures to repair a vehicle having missing restraints control module attaching
weld nut(s). Read both procedures before proceeding with the repair.
NOTE: If two or more weld nuts are missing, do not install the "J" nuts as outlined in this procedure.
Weld nuts must be installed as outlined in Weld Nut Repair — Missing Weld Nut, Restraints Control
Module (RCM).
NOTE: The following procedure applies to vehicles that have a rectangular hole in the sheet metal that
is in close proximity to the missing weld nut.
1. Obtain a "J" nut (part number N623332- S301) or any of the following optional "J" nuts (part
numbers: N623342- S101, N800854-S100, N800925- S100).
2. Obtain a 6 mm (0.24 in) grounding screw (part number N806327- S190) or equivalent.
3. Install the "J" nut through the rectangular hole in the sheet metal.
4. NOTE: Be sure the threaded portion of the "J" nut is aligned with the clearance hole in the sheet
metal.
Install the crash sensor.
5. Tighten the attaching screws to specification. For additional information, refer to Torque Specifications in this section.
SECTION 501-
20B: Supplemental Restraint System 2003 Mustang Workshop Manual Klj . 1 ba
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GENERAL PROCEDURES
Weld Nut Repair —
Missing Weld Nut, Restraints Control
Module (RCM)
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.
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).
NOTE: There are two procedures to repair a vehicle having missing restraints control module attaching
weld nut(s). Read both procedures before proceeding with the repair.
NOTE: If two or more weld nuts are missing, do not install the "J" nuts as outlined in Weld Nut Repair
—" J" Nut, Restraints Control Module (RCM). Weld nuts must be installed as outlined in this
procedure.
NOTE: Radiator support repair shown, others are similar.
1. Obtain a 6 mm (0.24 in) weld nut (part number N806285- S190).
2. Obtain a 6 mm (0.24 in) grounding screw (part number N806327- S190).
3. Route a sufficient length of copper welding wire through the weld nut clearance hole and back out an adjacent access hole.
4. Feed the copper welding wire through the weld nut, then through a standard flatwasher.
SECTION 501-
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