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Seat Belt System Cadillac CTS I

Restraints Control Systems 3 illustrations ~2929 words

Fastener Tightening Specifications

ApplicationSpecification
MetricEnglish
Child Seat Tether Anchor Bolts30 N.m22 lb ft
Front Seat Belt to Seat Frame Nut42 N.m31 lb in
Front Seat Retractor Bolt26 N.m19 lb ft
Left and Right Rear Shoulder Belt Retractor Bolts and Nuts30 N.m22 lb ft
Rear Seat Belt to Floor Pan Bolts30 N.m22 lb ft
Rear Seat Buckle / Seat Back Anchor Bolts41 N.m30 lb ft
Rear Seat Center Shoulder Belt Retractor Bolt30 N.m22 lb ft
Seat Belt Roller Assembly Bolt52 N.m38 lb ft
Seat Belt Roller Assembly Cover Screws5 N.m44 lb in

Fastener Tightening Specifications

Seat Belt Schematic Icons

Seat Belt Schematic Icons Icon Icon Definition CAUTION: When performing service on or near the SIR components or the SIR wiring, the SIR system must be disabled. Refer to SIR Disabling and Enabling Zones. Failure to observe the correct procedure could cause deployment of the SIR components, personal injury, or unnecessary SIR system repairs

Scheme 1

Scheme 1: Seat Belt Schematics
Scheme 1: Seat Belt Schematics

Scheme 2

Scheme 2: Seat Belt Component Views
Scheme 2: Seat Belt Component Views
CalloutComponent Name
1Inflatable Restraint Sensing and Diagnostic Module (SDM) Connector
2Inflatable Restraint Sensing and Diagnostic Module (SDM)
3G306
4Inflatable Restraint Side Impact Module - Left
5Seat Belt - Left
6Seat Belt Switch/Seat Belt Pretensioner - Left, Right Similar
7Seat-Driver - Left, Right Similar

Seat Belt Connector End Views

Seat Belt Connector End Views - Seat Belt Switch - Driver Connector Part Information 12047663 2-Way M Metri-Pack 150 Series (BK) Pin Wire Color Circuit No. Function A BK 5017 Seat Belt Switch - Driver - Low Reference B BK/WH 238 Seat Belt Switch - Driver - Signal

Diagnostic Starting Point - Seat Belts

Begin the system diagnosis by reviewing the Seat Belt System Description and Operation . Reviewing the description and operation information will help you determine the correct symptom diagnostic procedure when a malfunction exists. Reviewing the description and operation information will also help you determine if the condition described by the customer is normal operation.

Refer to Symptoms - Seat Belts in order to identify the correct procedure for diagnosing the system and where the procedure is located.

Operational and Functional Checks

IMPORTANTIf the vehicle has been in a collision, refer to Repairs and Inspections Required After a Collision for additional information.

Perform the following inspection of the driver and passenger seat

  1. Turn the ignition switch to the ON position. Verify proper operation of the seat belt reminder lamp with the belt buckled and with the belt unbuckled. Refer to «Seat Belt System Description and Operation»(/cadillac/cts/i-2002-2007/remont/restraints-control-systems/#seat-belt-system) .
  2. Inspect the shoulder belt guide in order to ensure that the following conditions are met: The seat belt webbing is seated flat in the guide slot. The seat belt webbing does not bind.
  3. Verify that the seat belt buckle faces inboard and is accessible.
  4. Verify that the seat belt retractor units are securely attached.
  5. Verify that the seat belt anchor bolts are secure.
  6. Fully extend the seat belt webbing. Verify that the seat belt webbing does not have any twists or tears.
  7. Allow the seat belt webbing to retract. Verify that the seat belt webbing returns freely and completely back into the retractor.
  8. Snap the seat belt latch plate into the buckle.
  9. Sharply tug on the seat belt latch plate and the buckle. Verify that the seat belt latch plate and the buckle remain locked when tugged.
  10. Push the button on the buckle. Verify that the seat belt latch plate releases easily from the buckle. Verify that the button returns to its original position.

Perform the following steps to inspect the left and right rear seat belts

  1. Inspect the shoulder belt guide in order to ensure that the following conditions are met: The seat belt webbing is seated flat in the guide slot. The seat belt webbing does not bind.
  2. Verify that the seat belt buckle is accessible.
  3. Verify that the seat belt retractor units are securely attached.
  4. Verify that the seat belt anchor bolts are secure.
  5. Fully extend the seat belt webbing. Verify that the seat belt webbing does not have any twists or tears.
  6. Allow the seat belt webbing to retract. Verify that the seat belt webbing returns freely and completely back into the retractor.
  7. Snap the seat belt latch plate into the buckle.
  8. Sharply tug on the seat belt latch plate and the buckle. Verify that the seat belt latch plate and the buckle remain locked when tugged.
  9. Push the button on the buckle. Verify that the seat belt latch plate releases easily from the buckle. Verify that the button returns to its original position.

Perform the following steps to inspect the center rear seat belts

  1. Verify that the center seat belts are accessible.
  2. Verify that the center seat belt retractor unit is securely attached.
  3. Verify that the seat belt anchor bolts are secure.
  4. Verify that the seat belt buckle anchor bolts are secure.
  5. Fully extend the center seat belt webbing. Verify that the seat belt webbing does not have any twists or tears.
  6. Allow the center seat belt webbing to retract. Verify that the seat belt webbing returns freely and completely back into the retractor.
  7. Snap the seat belt latch plate into the buckle.
  8. Sharply tug on the seat belt latch plate and the buckle. Verify that the seat belt latch plate and the buckle remain locked when tugged.
  9. Use a flat bladed tool and push the release button on the center right seat belt anchor buckle.
  10. Push the release button on the center left seat belt buckle. Verify that the seat belt latch plate releases easily from both buckles. Verify that the buttons return to their original positions.

For information on removal of the rear seats cushions refer to Seat Cushion Replacement - Rear in Seats.

Emergency Locking Retractors

CAUTIONPerform this test in an area clear of other vehicles or obstructions. Do not conduct this test on the open road. A large, empty parking lot is suitable. Failure to observe this precaution may result in damage to the vehicle and possible personal injury.

Scheme 3

Scheme 3
Scheme 3
  1. Fasten the seat belts, an assistant is needed when the retractor under test is not part of the driver seat belt.
  2. Accelerate the vehicle slowly to 16 km/h (10 mph) and apply the brakes firmly.
  3. Verify that the seat belt locks when braking firmly.
  4. If the belt does not lock, proceed with the following steps. IMPORTANT: When performing this check, note the position the retractor is mounted. Some retractors are not mounted at a 0 degree inclination. Remove the seat belt retractor assembly. Tilt the seat belt retractor slowly. Ensure that the seat belt webbing can be pulled from the retractor at an inclination of 15 degrees or less and cannot be pulled from the retractor at an inclination of 45 degrees or more. If the seat belt retractor does not operate as described, replace the retractor assembly. Refer to the following procedures: «Seat Belt Retractor Replacement - Center Rear»(/cadillac/cts/i-2002-2007/remont/restraints-control-systems/#seat-belt-system) «Seat Belt Retractor Replacement - Rear»(/cadillac/cts/i-2002-2007/remont/restraints-control-systems/#seat-belt-system)

Symptoms - Seat Belts

IMPORTANTReview the seat belt system description and operation in order to familiarize yourself with the system and how it functions. Refer to Seat Belt System Description and Operation .

Visual/Physical Inspection

  1. Inspect for aftermarket devices which could affect the operation of the seat belt system. Refer to «Checking Aftermarket Accessories»(/cadillac/cts/i-2002-2007/remont/body-electrical/#wiring-systems-diagnostic-information-and-procedures__checking-aftermarket-accessories) in Wiring Systems.
  2. Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Symptom List

Refer to the following symptom diagnostic procedure in order to diagnose the symptom

Seat Belt Indicator Circuit Malfunction

StepActionYesNo
Schematic Reference: Seat Belt Schematics
1Did you review the Seat Belt System Description and Operation and perform the necessary inspections?Go to Step 2Go to Symptoms - Seat Belts
2Turn ON the ignition, with the engine OFF. Monitor the fasten safety belt indicator while buckling and unbuckling the driver seat belt. Does the system operate properly?Go to Testing for Intermittent Conditions and Poor Connections in Wiring SystemsGo to Step 3
3Buckle the driver's seat belt. With a scan tool, observe the Driver Side Belt Status parameter in the SIR scan tool data list. Does the scan tool indicate that the Driver Side Belt Status parameter displays Buckled?Go to Step 4Go to Step 5
4Replace the IPC. Refer to Instrument Panel Cluster (IPC) Replacement in Instrument Panel, Gages, and Console. Did you complete the replacement?Go to Step 8
5Turn OFF the ignition. Disconnect the inflatable restraint sensing and diagnostic module (SDM) connector. Refer to Inflatable Restraint Sensing and Diagnostic Module Replacement in SIR. Disconnect the seat belt switch - LF connector. Test the seat belt switch - left signal circuit for an open or high resistance. Did you find and correct the condition?Go to Step 8Go to Step 6
6Test the seat belt switch - left ground circuit for an open or high resistance. Did you find and correct the condition?Go to Step 8Go to Step 7
7Replace the seat belt switch - LF. Refer to Seat Belt Buckle Pretensioner Replacement . Did you complete the replacement?Go to Step 8
8Operate the system in order to verify the repair. Did you find and correct the condition?System OKGo to Step 3

Seat Belt Indicator Circuit Malfunction

Seat Belt Service Precautions

  1. Do not bleach or dye the seat belt webbing. Use only the following items in order to clean the seat belt webbing: A mild soap and water solution A soft brush or cloth
  2. Keep sharp edges and damaging objects away from the seat belts. Avoid bending or damaging any part of the seat belt buckle or the latch plate. Replace any seat belts which are cut or damaged in any way.
  3. Use only the correct seat belt anchor bolts/screws and tighten the anchor bolts/screws to the correct torque value. Refer to «Fastener Tightening Specifications»(/cadillac/cts/i-2002-2007/remont/restraints-control-systems/#seat-belt-system__fastener-tightening-specifications) . When installing seat belt anchor bolts, start the bolt by hand to ensure that the bolt is threaded straight.
  4. Some seat belts and retractors require service as a set, with service replacement parts only. Do not attempt to repair to individual components that require service as a set.
  5. Verify that the replacement part number is correct for the vehicle at that seating position. Do not substitute a seat belt from a different seating position.

Repairs and Inspections Required After a Collision

CAUTIONRestraint systems can be damaged in a collision. To help avoid injury and ensure that all parts in need of replacement are replaced: Replace any seat belt system that was in use during the collision serious enough to deploy any automatic restraint device such as air bags and seat belt pretensioners. This not only includes seat belt systems in use by people of adult size, but seat belt systems used to secure child restraints, infant carriers and booster seats, including LATCH system and top tether anchorages. Replace any seat belt system that has torn, worn, or damaged components. This not only includes adult seat belt systems, but built-in child restraints and LATCH system components, if any. Replace any seat belt system if you observe the words "REPLACE" or "CAUTION", or if a yellow tag is visible. Do not replace a seat belt if only the child seat caution label is visible. Replace any seat belt system if you are doubtful about its condition. This not only includes adult seat belt systems, but built-in child restraints, LATCH system components, and any restraint system used to secure infant carriers, child restraints, and booster seats. Do NOT replace single seat belt system components in vehicles that have been in a collision as described above. Always replace the entire seat belt system with the buckle, guide and retractor assembly, which includes the latch and webbing material.

After a minor collision where no automatic restraint device was deployed, seat belt system replacement may not be necessary, unless some of the parts are torn, worn, or damaged.

Removal Procedure

  1. Remove the rear seat cushion. Refer to «Seat Cushion Replacement - Rear»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) in Seats.
  2. Remove the seat belt buckle fasteners (1) and remove the seat belt buckles (2).
  3. Disconnect the wiring connection to the left and right seat belt buckles.
  4. Remove the rear seat belt buckles (2) from the floor pan.

Installation Procedure

  1. Install the rear seat belt buckles (2) to the floor pan. Tighten: Tighten the seat belt buckle fasteners to 30 N.m (22 lb ft).
  2. Connect the left and right rear seat belt buckle electrical connectors.
  3. Install the rear seat cushion. Refer to «Seat Cushion Replacement - Rear»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) in Seats.
  1. Remove the front seat back trim cover. Refer to «Seat Replacement - Bucket»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) in Seats.
  2. Remove the front seat cover and pad. Refer to «Seat Back Cover and Pad Replacement - Front»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) in Seats.
  3. Remove the screws retaining the roller assembly cover and remove the cover.
  4. Remove the bolt retaining the seat belt retractor to the seat frame.
  5. Remove the seat belt lower retaining nut (2).
  6. Remove the seat belt retractor assembly.
  1. Ensure that the seat belt is not twisted before installing the retractor.
  2. Install the seat belt (2) to the mounting stud. Ensure that the anti-rotation tab on the seat belt is located properly in the seat frame before tightening the retaining nut.
  3. Install the retaining nut. Tighten: Tighten the nut to 42 N.m (31 lb ft).
  4. Position the seat belt over the roller assembly. Ensure that the seat belt is not twisted.
  5. Install the seat belt retractor. Ensure that the anti-rotation tab on the seat belt retractor is located properly on the seat frame before tightening the retractor fastener.
  6. Install the retaining bolt. Tighten: Tighten the bolt to 26 N.m (19 lb ft).
  7. Install the roller assembly cover.
  8. Install the roller assembly screws. Tighten: Tighten the fasteners to 5 N.m (44 lb in).
  9. Ensure proper operation of the seat belt retractor.
  10. Reinstall the seat back cover. Refer to «Seat Back Cover and Pad Replacement - Front»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) in Seats.
  11. Install the front seat. Refer to «Seat Replacement - Bucket»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) in Seats.
  12. Confirm proper operation of the seat belt retractors.
  1. Remove the seat back trim. Refer to «Seat Back Trim Replacement - Front»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) in Seats.
  2. Remove the head restraint. Refer to «Head Restraint Replacement - Front Seat»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) in Seats.
  3. Remove the head restraint retainers. Refer to «Head Restraint Retainer Replacement - Front Seat»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) in Seats.
  4. Remove the seat back cover far enough to gain access to the roller assembly. Refer to «Seat Back Cover and Pad Replacement - Front»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) in Seats.
  5. Remove the seat belt roller assembly cover screws.
  6. Remove the seat belt roller assembly cover.
  7. Lift the seat belt over the roller assembly.
  8. Remove the seat belt roller assembly bolt (1) from the lower seat frame.
  9. Remove the roller assembly.
  1. Install the seat belt roller assembly into the seat frame.
  2. Install the roller assembly bolt (1). Tighten: Tighten the retaining nuts to 52 N.m (38 lb ft).
  3. Install the seat belt roller assembly cover.
  4. Install the seat belt roller assembly screws. Tighten: Tighten the screws to 5 N.m (44 lb in).
  5. Ensure that the seat belt is not twisted.
  6. Install the seat back cover. Refer to «Seat Back Cover and Pad Replacement - Front»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) in Seats.
  7. Install the seat back trim cover. Refer to «Seat Back Trim Replacement - Front»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) in Seats.
  8. Install the head restraint retainers. Refer to «Head Restraint Retainer Replacement - Front Seat»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) in Seats.
  9. Install the head restraint. Refer to «Head Restraint Replacement - Front Seat»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) in Seats.
  10. Ensure the seat belt operates correctly.
  1. Remove the rear seat cushion. Refer to «Seat Cushion Replacement - Rear»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) in Seats.
  2. Remove the rear seat back. Refer to «Seat Back Replacement - Rear»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) in Seats.
  3. Remove the rear seat shoulder belt to the floor pan fastener.
  4. Remove the rear trim shelf panel. Refer to «Trim Panel Replacement - Rear Window Shelf»(/cadillac/cts/i-2002-2007/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
  5. Remove the sail panel. Refer to «Sail Panel Replacement»(/cadillac/cts/i-2002-2007/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
  6. Remove the seat belt retractor fastener (2).
  7. Remove the seat belt retractor (1).
  1. Install the rear shoulder belt retractor (1). Engage the tab on the retractor (1).
  2. Install the seat belt retractor fastener (2). Tighten: Tighten the rear seat retractor fastener to 30 N.m (22 lb ft).
  3. Route the shoulder belt through the sail panel and verify that it is not twisted.
  4. Install the shoulder belt fastener. Tighten: Tighten the shoulder bolt fastener to 30 N.m (22 lb ft).
  5. Install the sail panel. Refer to «Sail Panel Replacement»(/cadillac/cts/i-2002-2007/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
  6. Install the rear trim shelf panel. Refer to «Trim Panel Replacement - Rear Window Shelf»(/cadillac/cts/i-2002-2007/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
  7. Install the rear seat back. Refer to «Seat Back Replacement - Rear»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) in Seats.
  8. Install the rear seat cushion. Refer to «Seat Cushion Replacement - Rear»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) in Seats.
  1. Remove the rear seat cushion. Refer to «Seat Cushion Replacement - Rear»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) in Seats.
  2. Remove the rear seat back. Refer to «Seat Back Replacement - Rear»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) in Seats.
  3. Disengage the center belt escutcheon from the rear shelf trim panel.
  4. Remove the rear shelf trim panel. Refer to «Trim Panel Replacement - Rear Window Shelf»(/cadillac/cts/i-2002-2007/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
  5. Remove the rear seat center belt retractor fastener (1).
  6. Remove the rear seat center belt retractor (2).
  1. Install the center seat belt retractor (2) to the cross car beam. Ensure the retainer tab engages the notch in the cross car beam.
  2. Install the center seat belt retractor fastener (1). Tighten: Tighten the rear seat center shoulder belt retractor fastener to 30 N.m (22 lb ft).
  3. Install the rear shelf trim panel. Refer to «Trim Panel Replacement - Rear Window Shelf»(/cadillac/cts/i-2002-2007/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
  4. Install the rear seat center belt escutcheon to the rear shelf.
  5. Install the rear seat back. Refer to «Seat Back Replacement - Rear»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) in Seats.
  6. Install the rear seat cushion. Refer to «Seat Cushion Replacement - Rear»(/cadillac/cts/i-2002-2007/remont/seats/#seat-system) In Seats.
  1. Remove the rear shelf panel. Refer to «Trim Panel Replacement - Rear Window Shelf»(/cadillac/cts/i-2002-2007/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
  2. Remove the bolt that retains the child tether anchor that is being serviced.
  3. Remove the child tether anchor from the vehicle.
IMPORTANTDuring installation ensure that the child tether anchors are installed with the anti-rotation tabs firmly seated in the anti-rotation tab holes on the cross car beam.
  1. Install the child tether anchor to the cross car beam.
  2. Install the child tether anchor bolt. Tighten: Tighten the bolt to 30 N.m (22 lb ft).
  3. Install the rear shelf trim panel. Refer to «Trim Panel Replacement - Rear Window Shelf»(/cadillac/cts/i-2002-2007/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
IMPORTANTIf the vehicle has been in a collision, refer to Repairs and Inspections Required After a Collision for additional information.

The front seat belt system includes a driver and\or passenger seat belt retractor and buckle.

The driver's seat belt system, includes a seat belt switch in the driver seat buckle which controls a reminder lamp and a tone alarm.

  1. When the driver seat belt is buckled, the driver's door is closed, and the ignition switch is turned ON, the following events will occur: The tone alarm will not operate. The reminder lamp will not operate.
  2. When the driver's seat belt is not buckled, the driver's door is closed, and the ignition switch is in ON position, the following events will occur: The tone alarm will operate for 4 to 8 seconds and then go OFF. The reminder lamp will operate for 20 seconds, until the driver seat belt is buckled.

The rear seat belt system includes the following components

  1. The rear seat belt retractor is located under the rear shelf trim panel and is attached to the rear shelf body panel.
  2. The center rear seat belt buckle and the outer seat belt buckle are located in the center of the seat cushion and they are attached to the rear floor pan.

Child Seat Restraint System

CAUTIONA child in a rear-facing child restraint can be seriously injured if the right-front passengers air bag inflates. This is because the back of a rear-facing child restraint would be very close to the inflating air bag. NEVER use a rear-facing child restraint in this vehicle. If a forward-facing child restraint is suitable for your child, ALWAYS move the front passenger seat as far back as it will go and then install the child restraint. Be sure the child restraint position does not conflict with any additional requirements provided by the manufacturer. For more information, refer to the vehicle owners manual and the instruction that came with the child restraint.

The child seat may only be used in a forward facing seating location. The child seat should be installed and secured according to the manufacturer's directions. If the child seat has a top strap, the seat will need to be anchored. Passengers should not be allowed to sit at locations where the seat belts are being used to secure the child seat.

All vehicles are equipped with a dual-mode type retractor with emergency and automatic locking features. The automatic locking feature is for restraint of a child seat. The child seat can be secured by pulling the seat belt all the way out to lock it. Then, tighten the seat belt around the child seat.

If a child seat is to be used in the second seat position, a special dealer-installed anchor must be used in order to anchor the child seat top strap. (This only applies to the seats designed with the top strap provision and for the vehicles sold in Canada). In order to ensure the correct top strap angle, the child seat is only to be used at the seating position for which the top strap anchor is installed.

The inflatable restraint sensing and diagnostic module (SDM) receives a discrete input from the left front seat belt switch. The left front seat belt switch is closed when the seat belt is unbuckled.

Fasten Safety Belt Indicator (ISO Symbol) (Red)

The fasten safety belt indicator may only be ON during RUN. The instrument panel cluster (IPC) illuminates the fasten safety belt indicator under the following conditions

  1. During the bulb check.
  2. The inflatable restraint sensing and diagnostic module (SDM) sends the status of the driver's seat belt switch to the IPC via a class 2 message. If the seat belt is unfastened, the IPC will illuminate the fasten safety belt indicator for 72 seconds or until the seat belt is fastened. If the seat belt is unfastened within 8 seconds following the bulb check, the IPC sends a class 2 serial message requesting 5 chimes to sound.