PASSIVE RESTRAINT SYSTEM
The Passive Restraint System operates electrically. After entering the vehicle and closing the door, insert the key into the ignition and turn to the ON position. A motor will cause the shoulder belt to slide along a belt track starting at the front body A-pillar and moving rearward to its locked position at the B-pillar.
The shoulder belt warning indicator lamp in the instrument panel will illuminate four to eight seconds. In the unlikely event the shoulder belt should stall before it reaches the B-pillar, the indicator lamp will begin to flash after nine seconds and will continue to flash until the shoulder belt is in the proper locked position. If the belt fails to reach the B-pillar or the indicator lamp continues to flash refer to "MANUAL OVERRIDE SYSTEM" procedure.
The shoulder belt will automatically adjust itself to allow comfort and freedom of movement. It will lock tight only under heavy braking or impacts of approximately 3 mph (5km/h) or more.
MANUAL OVERRIDE SYSTEM
If the shoulder belt does not move or stops before reaching the B-pillar position, perform the following steps before driving the vehicle.
Scheme 1
- Open and close door(s). Make sure the door is completely closed.
- Using a coin or screwdriver, remove cover at lower end of the B-pillar interior trim panel. Turn override knob clockwise to move the shoulder belt manually until it stops at the B-pillar. (Scheme 1) WARNING: For Fig. (Scheme 1) if it is necessary to use the override knob to put the shoulder belt in position, have the system serviced by a qualified technician as soon as possible.
- If the belt does not mover to the B-pillar, the belt may be broken or the motor drive gear stripped. Grasp the belt and pull it towards the B-pillar while turning the knob on the motor clockwise. This should move the belt to the lowest position on the B-pillar. This will allow the occupant(s) to position the belt manually over the shoulder until the system can be serviced properly.
Scheme 2
SEAT BELT FUNCTIONALITY CHECK
| Action | Result |
|---|---|
| Door Closed, Ignition Off | No Belt Movement |
| Ignition On, Door Closed | Belt moves to B-Pillar |
| Door Open, Ignition On | Belt moves to A-Pillar |
| Door Closed, Ignition On | Belt moves to B-Pillar |
| Ignition On, Door Open | No Belt Movement |
| Door Open, Ignition Off | Belt moves to A-Pillar |
| Door Open, Ignition On, & Inertia Switch Open | No Belt Movement |
| Door Open, Ign. Off & Inertia Switch Open | Belt moves to A-Pillar |
SEAT BELT FUNCTIONALITY CHECK
WARNING INDICATORS FUNCTIONALITY CHECK
| Action | Result |
|---|---|
| Belt Doesn't Properly Reach the B-Pillar After 7.5 Seconds. | Fasten Belt Indicator on Instrument Panel Flashes |
| Release Lever in the UP Position, With Ignition On | 1 - Fasten Belt Indicator Flashes |
| " | 2 - Release Lever Warning Indicator Flashes |
| " | 3 - Chime Sounds Continuously |
WARNING INDICATORS FUNCTIONALITY CHECK
TRACK LIMIT SWITCH DIAGNOSIS
- Checking Track Limit Switch. Disconnect the switch from the harness. Using a digital Volt-Ohm meter on 200 ohm scale. Measure resistance with plunger extended. If the switch is closed, go to next step. If switch is open, replace switch.
- Verifying Switch Check. Depress switch plunger. Check ohmmeter indication. If switch is closed, replace switch. If switch is open, switch is OK. Reconnect harness to switch.
DOOR AJAR SWITCH DIAGNOSIS
- Checking Door Ajar Switch. Disconnect switch from wiring harness. Door in latched position. Using a digital Volt-Ohm meter on 200 ohm scale, measure resistance between switch terminal and ground. If switch is OPEN, go to next step. If switch is closed, replace switch.
- Checking Switch Check. Check to verify switch is open. If switch is open, replace switch. If switch is closed, switch is OK. Reconnect harness to switch.
SPOOL RELEASE SWITCH DIAGNOSIS
- Checking Spool Release Switch. Disconnect both switches connected in series, located at the retractor release mechanism. Using a digital Volt-Ohm meter on 200-ohm scale. Measure resistance across switch terminals. If switch is closed, go to next step. If switch is open, replace switch.
- Checking Release Mechanism. When one or both release mechanism levers are in the up position, switch should be open. If switch is closed, replace switch. If switch is open, switch is OK. Reconnect harness to switch.
Scheme 3
Note. As per Ford Motor Company Bulletin No. 87-15-3, if a vehicle specific wire color in a connector does not match the diagram shown, it can usually be identified by comparing the other colors shown at the wire connectors. Specific wire color deviations in the manufacturing of a wire harness are usually for a short duration. Refer to the PASSIVE RESTRAINT PIN & CIRCUIT IDENTIFICATION CHART below.
PASSIVE RESTRAINT PIN & CIRCUIT I.D. CHART
| Pin No | Circuit | Description | Color |
|---|---|---|---|
| 1 | 159 | Door Jamb Switch to Buzzer (Lamps On/Key Warning Buzzer) | Black/Pink |
| 2 | 861 | Left Motor - Driver - R Relay | Black/White |
| 3 | 860 | Left Motor - Driver - F Relay | Black/Orange (Or (Purple/Yellow) |
| 4 | 860 | Left Motor - Driver - F Relay | Black/Orange (Or (Purple/Yellow) |
| 5 | 862 | Left Limit A - Driver | Brown/Yellow |
| 6 | 57 | Ground Circuit | Black |
| 7 | 38 | Power Supply to Battery | Black/Orange |
| 8 | 863 | Right Door Open - Passenger | Red |
| 9 | 865 | Right Motor - Passenger - R | Purple/White |
| 10 | 864 | Right Motor - Passenger - F | Orange |
| 11 | 864 | Right Motor - Passenger - F | Orange |
| 12 | 866 | Inertia Switch to Module | White |
| 13 | 867 | Left Door Open - Driver | Dark Blue |
| 14 | 868 | Emergency Release Levers | Red |
| 15 | 450 | Safety Belt Warning Indicator Light Feed | Dark Green/Light Green |
| 16 | 871 | Safety Belt Indicator Light To Module | Yellow |
| 17 | 861 | Left Motor - Driver - R | Black/White |
| 18 | 872 | Left Limit B - Driver | Light Green |
| 19 | 57 | Ground Circuit | Black |
| 20 | 38 | Power Supply to Battery | Black/Orange |
| 21 | 873 | Right Limit B - Passenger | Tan |
| 22 | 865 | Right Motor - Passenger - R | Purple/White |
| 23 | 874 | Right Limit A - Passenger | Gray |
| 24 | 875 | Ground Logic Module | Black/Light Blue |
| 25 | 640 | Run/Start/Door Ajar | Red/Yellow |
| 26 | 877 | Release Lever Warning Indicator Light - Console | White/Orange |
PASSIVE RESTRAINT PIN & CIRCUIT IDENTIFICATION CHART
Note. The limit switches are energized for only 7-10 seconds in order to monitor the movement of the belt. After the appropriate switch(s) signals the module, power to the limit switch(s) is cut off.
Note. For best results, use Rotunda Passive Restraint System Tester (0007-00034) with the accompanying PINPOINT TESTS tables below, that follow the DIAGNOSTIC TIPS table.
DIAGNOSTIC TIPS
Note. The limit switches are energized for only 7-10 seconds in order to monitor the movement of the belt. After the appropriate switch(s) signals the module, power to the limit switch(s) is cut off.
Note. For best results, use Rotunda Passive Restraint System Tester (0007-00034) with the accompanying PINPOINT TESTS tables below, that follow the DIAGNOSTIC TIPS table.
PINPOINT TEST J - PASSIVE RESTRAINT MODULE CHECK
| Action | Result |
|---|---|
| Belt Doesn't Properly Reach the B-Pillar After 7.5 Seconds. | Fasten Belt Indicator on Instrument Panel Flashes |
| Release Lever in the UP Position, With Ignition On | 1 - Fasten Belt Indicator Flashes |
| " | 2 - Release Lever Warning Indicator Flashes |
| " | 3 - Chime Sounds Continuously |
WARNING INDICATORS FUNCTIONALITY CHECK
Scheme 11
Scheme 12
Scheme 13
Scheme 14
Scheme 15
Scheme 16
Scheme 17
- Disconnect negative battery cable. Remove A-pillar and B-pillar trim garnish mouldings. (Scheme 11)and (Scheme 12). Remove plug button. (Scheme 13) Cycle the shoulder belt to the A-pillar. Remove two screws retaining drive belt track to motor, one screw adjacent to motor retaining drive belt vertical guide. On Escort 3-door models, remove drive belt lower guide retaining screw.
- Disconnect drive belt track from motor allowing belt to pass by gear teeth without engagement. (Scheme 16) Remove limit switch from A-pillar bracket, screw from front A-pillar switch. Remove two screws retaining front A-pillar switch bracket to track assembly. Gently slide shoulder belt retainer forward off track. NOTE: Drive belt should slide out of track with shoulder belt retainer.
- Remove shoulder belt retainer from drive belt.
Installation
Note. Prior to drive belt installation, lubricate track using Emralon 329 or equivalent.
- Insert drive belt at front of track to A-pillar Install retainer into large slot at front of tape. Slide belt in track rearward until end is located approximately 12.7mm (1/2 inch) in the upper track slot.
- Align sprocket holes in drive belt with sprocket teeth. Engage track locator on switch bracket into slot in A-pillar. Attach A-pillar track switch bracket to A-pillar and track assembly, and install limit switch.
- Return belt anchor to the B-pillar position. Pull webbing out of retractor at console, allowing belt webbing to lay flat on the seat with no twist. Align anchor notch and install retaining bolt. Install belt attaching shoulder belt. Tighten screw to 22-32 lb-ft. (30-43 N.m.)
Note. Use screw N804772-S190 following any service to shoulder harness.
Removal
- Disconnect negative battery cable. Remove plug button at shoulder belt retainer anchor cover. Disconnect shoulder belt anchor at retainer and remove emergency lever knobs. Remove console attaching screws, arm rest (if so equipped).
- Disengage shoulder harness opening bezel from console, and retractor.
Scheme 18
To install reverse removal procedure.
- Disconnect negative battery cable. Remove quarter trim panel on three-door models or B-pillar trim on 4 door or wagon. Remove drive belt track retaining screws from motor and one screw from vertical drive belt guide adjacent to motor. Slide drive belt track down and out of the way for motor removal and disconnect electrical connectors.
- Remove hex nuts from motor mounting bracket studs.
For installation, reverse removal procedure.
- disconnect negative battery cable. Remove instrument panel, steering column opening cover, and reinforcement.
- Remove module mounting bracket located on vertical brace to right of steering column. Disconnect module connector. Remove module from bracket.
Scheme 19
- disconnect negative battery cable. Remove instrument panel, steering column opening cover, and reinforcement.
- Remove module mounting bracket located on a horizontal brace to the left of the steering column. Disconnect module connector. Remove module from bracket.
Scheme 20
Scheme 21
See also:
• PASSIVE RESTRAINT PIN &