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Seat Belt System Cadillac CTS II

Restraints Control Systems 11 illustrations ~1972 words

Fastener Tightening Specifications

ApplicationSpecification
MetricEnglish
Child Tether Anchor Bolt30 N.m22 lb ft
Front Seat Belt Buckle Assembly40 N.m30 lb ft
Rear Seat Center Belt Retractor Bolt30 N.m22 lb ft
Rear Seat Center Shoulder Belt Anchor Plate Bolt36 N.m27 lb ft
Seat Belt Buckle Nut36 N.m27 lb ft
Seat Belt Retractor Bolt45 N.m33 lb ft
Seat Shoulder Belt Anchor Plate Bolt45 N.m33 lb ft
Shoulder Belt Guide Bolt47 N.m35 lb ft

Scheme 1

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

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/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__checking-aftermarket-accessories) .
  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 .

Symptom List

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

  1. «Seat Belt Does Not Retract»(/cadillac/cts/ii-2007-2014/remont/restraints-control-systems/#seat-belt-system__seat-belt-does-not-retract)
  2. «Seat Belt Indicator Circuit Malfunction - Driver»(/cadillac/cts/ii-2007-2014/remont/restraints-control-systems/#seat-belt-system)
  3. «Seat Belt Indicator Circuit Malfunction - Passenger»(/cadillac/cts/ii-2007-2014/remont/restraints-control-systems/#seat-belt-system)

Seat Belt Does Not Retract

  1. Grab the seat belt webbing and slowly and firmly extract 15-25 mm (5/8-1 in) of webbing from the seat belt.
  2. Release the seat belt and allow the webbing to slowly retract back into the retractor.
  3. Check to see if the seat belt is released. If the seat belt is not released, repeat steps 1 and 2, two times more.
  4. If the retractor does not release after repeating the steps, replace with a new retractor.

Diagnostic Instructions

  1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit/System Description

The seat belt buckle switch is located within the seat belt buckle assembly and provides an input to the inflatable restraint sensing and diagnostic module (SDM). The SDM supplies a low reference circuit and a seat belt switch signal circuit to determine a buckled or unbuckled condition.

If the SDM determines the driver seat belt has not been buckled, the SDM will send a serial data message to the instrument panel clutch (IPC) to illuminate the seat belt warning indicator. If the SDM determines that a passenger is sitting in the passenger seat and the seat belt has not been buckled, the SDM will send a serial data message to the passenger presence system (PPS) display to illuminate the passenger seat belt warning indicator.

Reference Information

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
  3. «Wiring Repairs»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)
  4. «Connector Repairs»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

  1. Ignition ON, observe the scan tool Driver Seat Belt Switch parameter while buckling and unbuckling the driver seat belt. The parameter should change between Buckled and Unbuckled. If the parameter does not cycle between the specified values, refer to Driver Seat Belt Switch Circuit Malfunction.
  2. Ignition ON, seat belt unbuckled, verify the seat belt warning indicator is illuminated on the IPC. If the indicator is not illuminated, replace the IPC.

Circuit/System Testing

IMPORTANTWhen removing connectors, inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the appropriate component/connector: The SDM The SDM wiring harness connector The seat belt buckle The seat belt buckle wiring harness connector

Driver Seat Belt Switch Circuit Malfunction.

  1. Ignition OFF, disconnect the harness connector at the driver seat belt switch.
  2. Ignition OFF, test for less than 10 ohms between the low reference circuit terminal A and ground. If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the SDM.
  3. Ignition ON, verify the scan tool Driver Seat Belt Switch parameter is Unbuckled. If not the specified value, test the signal circuit terminal B for a short to ground. If the circuit tests normal, replace the SDM.
  4. Install a 3A fused jumper wire between the signal circuit terminal B and the low reference circuit terminal A. Verify the scan tool Driver Seat Belt Switch parameter is Buckled. If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the SDM.
  5. If all circuits test normal, test or replace the seat belt buckle assembly.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Seat Belt Retractor Pretensioner Replacement - Front (W2E)»(/cadillac/cts/ii-2007-2014/remont/airbag/#supplemental-inflatable-restraint-system) or «Seat Belt Retractor Pretensioner Replacement - Front (AQ9)»(/cadillac/cts/ii-2007-2014/remont/airbag/#supplemental-inflatable-restraint-system)
  2. «Control Module References»(/cadillac/cts/ii-2007-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for SDM and IPC replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/cadillac/cts/ii-2007-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The seat belt buckle switch is located within the seat belt buckle assembly and provides an input to the inflatable restraint sensing and diagnostic module (SDM). The SDM supplies a low reference circuit and a seat belt switch signal circuit to determine a buckled or unbuckled condition.

If the SDM determines the driver seat belt has not been buckled, the SDM will send a serial data message to the instrument panel cluster (IPC) to illuminate the seat belt warning indicator. If the SDM determines that a passenger is sitting in the passenger seat and the seat belt has not been buckled, the SDM will send a serial data message to the passenger presence system (PPS) display to illuminate the passenger seat belt warning indicator.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
  3. «Wiring Repairs»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)
  4. «Connector Repairs»(/cadillac/cts/ii-2007-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition ON, observe the scan tool Passenger Seat Belt Switch parameter while buckling and unbuckling the passenger seat belt. The parameter should change between Buckled and Unbuckled. If the parameter does not cycle between the specified values, refer to Passenger Seat Belt Switch Circuit Malfunction.
  2. Ignition ON, while sitting in the passenger seat with the seat belt unbuckled, verify the passenger seat belt warning indicator is illuminated on the PPS display. If the indicator is not illuminated, replace the PPS display.
IMPORTANTWhen removing connectors, inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the appropriate component/connector: The SDM The SDM wiring harness connector The seat belt buckle The seat belt buckle wiring harness connector

Passenger Seat Belt Switch Circuit Malfunction.

  1. Ignition OFF, disconnect the harness connector at the passenger seat belt switch.
  2. Ignition OFF, test for less than 10 ohms between the low reference circuit terminal A and ground. If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the SDM.
  3. Ignition ON, verify the scan tool Passenger Seat Belt Switch parameter is Unbuckled. If not the specified value, test the signal circuit terminal B for a short to ground. If the circuit tests normal, replace the SDM.
  4. Install a 3A fused jumper wire between the signal circuit terminal B and the low reference circuit terminal A. Verify the scan tool Passenger Seat Belt Switch parameter is Buckled. If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the SDM.
  5. If all circuits test normal, test or replace the seat belt buckle assembly.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Seat Belt Retractor Pretensioner Replacement - Front (W2E)»(/cadillac/cts/ii-2007-2014/remont/airbag/#supplemental-inflatable-restraint-system) or «Seat Belt Retractor Pretensioner Replacement - Front (AQ9)»(/cadillac/cts/ii-2007-2014/remont/airbag/#supplemental-inflatable-restraint-system)
  2. «Control Module References»(/cadillac/cts/ii-2007-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for SDM replacement, setup, and programming

Repairs and Inspections Required After a Collision

WARNINGRestraint 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.

Scheme 2

Scheme 2: Seat Belt Latch Stop Installation
Scheme 2: Seat Belt Latch Stop Installation
CalloutComponent Name
Preliminary Procedure Locate the hole in the seat belt webbing where the original seat belt stop button was located. If the original hole in the seat belt webbing is not visible, perform the following: If either the right or left stop button is missing use the opposing seat belt as a reference. With the opposing seat belt fully stowed, measure the distance between the seat belt lower anchor and the stop button. Using the measurement obtained above, measure and mark the location of the missing stop button on the center of the seat belt webbing. Ensure the seat belt latch plate is located above the mark or original hole.
1Seat Belt Stop Button Procedure Work the male half of the stop button through the hole in the webbing or at the marked location. Align the female half of the stop button with the male half of the stop button. Snap the two halves together. Trim off any access of the male half of the stop button flush with the female half of the stop button. Tip: Ensure the male half of the stop button is facing forward in the vehicle in order to ensure the stop button will not snag customers clothing.

Scheme 3

Scheme 3: Driver or Passenger Seat Belt Buckle Replacement
Scheme 3: Driver or Passenger Seat Belt Buckle Replacement
CalloutComponent Name
Preliminary Procedure: Remove front seat. Refer to Front Seat Replacement - Bucket (AQ9) or Front Seat Replacement - Bucket (W2E) .
1Front Seat Belt Buckle Fastener CAUTION: Refer to Fastener Caution . Tighten: 40 N.m (30 lb ft)
2Front Seat Belt Buckle Assembly Procedure: Disconnect the electrical connector.
CAUTION
Refer to Fastener Caution .

Scheme 4

Scheme 4: Rear Seat Buckle Side Belt Replacement (Sedan)
Scheme 4: Rear Seat Buckle Side Belt Replacement (Sedan)
CalloutComponent Name
Preliminary Procedure: Remove the rear seat cushion. Refer to Rear Seat Cushion Replacement (Wagon) or Rear Seat Cushion Replacement (Sedan) .
1Rear Seat Belt Buckle Nut (Qty: 2) CAUTION: Refer to Fastener Caution . Tighten: 42 N.m (31 lb ft)
2Rear Seat Belt Shoulder Belt
3Rear Seat Belt Assembly Buckle
CAUTION
Refer to Fastener Caution .

Scheme 5

Scheme 5: Rear Seat Buckle Side Belt Replacement (Wagon)
Scheme 5: Rear Seat Buckle Side Belt Replacement (Wagon)
CalloutComponent Name
Preliminary Procedure: Remove the rear seat cushion. Refer to Rear Seat Cushion Replacement (Wagon) or Rear Seat Cushion Replacement (Sedan) .
1Rear Seat Belt Buckle Nut (Qty: 2) CAUTION: Refer to Fastener Caution . Tighten: 42 N.m (31 lb ft)
2Rear Seat Belt Assembly Buckle
CAUTION
Refer to Fastener Caution .

Scheme 6

Scheme 6: Driver or Passenger Seat Shoulder Belt Guide Adjuster Replacement
Scheme 6: Driver or Passenger Seat Shoulder Belt Guide Adjuster Replacement
CalloutComponent Name
Preliminary Procedure: Remove the center pillar upper trim. Refer to Center Pillar Upper Trim Panel Replacement .
1Shoulder Belt Guide Bolt CAUTION: Refer to Fastener Caution . Tighten: 47 N.m (35 lb ft)
2Shoulder Belt Guide Adjuster
CAUTION
Refer to Fastener Caution .

Scheme 7

Scheme 7: Rear Seat Belt Retractor Replacement (Sedan)
Scheme 7: Rear Seat Belt Retractor Replacement (Sedan)
CalloutComponent Name
Preliminary Procedure Remove the rear seat cushion. Refer to Rear Seat Cushion Replacement (Wagon) or Rear Seat Cushion Replacement (Sedan) . Remove the rear seat back. Refer to Rear Seat Back Cushion Replacement (Wagon) or Rear Seat Back Cushion Replacement (Sedan) . Remove the rear window shelf trim panel. Refer to Rear Window Panel Trim Replacement (Sedan) .
1Seat Shoulder Belt Anchor Plate Bolt CAUTION: Refer to Fastener Caution . Tighten: 45 N.m (33 lb ft)
2Seat Belt Retractor Bolt Tighten: 45 N.m (33 lb ft)
3Rear Shoulder Seat Belt Retractor
CAUTION
Refer to Fastener Caution .

Scheme 8

Scheme 8: Rear Seat Belt Retractor Replacement (Wagon)
Scheme 8: Rear Seat Belt Retractor Replacement (Wagon)
CalloutComponent Name
Preliminary Procedure Remove the rear seat cushion. Refer to Rear Seat Cushion Replacement (Wagon) or Rear Seat Cushion Replacement (Sedan) . Remove the rear seat back. Refer to Rear Seat Back Cushion Replacement (Wagon) or Rear Seat Back Cushion Replacement (Sedan) . Remove the body side lower trim panel. Refer to Body Side Lower Trim Panel Replacement (Wagon) .
1Seat Shoulder Belt Anchor Plate Bolt CAUTION: Refer to Fastener Caution . Tighten: 45 N.m (33 lb ft)
2Seat Belt Retractor Bolt Tighten: 45 N.m (33 lb ft)
3Rear Shoulder Seat Belt Retractor
CAUTION
Refer to Fastener Caution .

Scheme 9

Scheme 9: Rear Seat Center Retractor Side Belt Replacement (Sedan)
Scheme 9: Rear Seat Center Retractor Side Belt Replacement (Sedan)
CalloutComponent Name
Preliminary Procedure Remove the rear seat cushion. Refer to Rear Seat Cushion Replacement (Wagon) or Rear Seat Cushion Replacement (Sedan) . Remove the rear seat back. Refer to Rear Seat Back Cushion Replacement (Wagon) or Rear Seat Back Cushion Replacement (Sedan) . Remove the rear window shelf trim panel. Refer to Rear Window Panel Trim Replacement (Sedan) .
1Seat Shoulder Belt Anchor Plate Bolt CAUTION: Refer to Fastener Caution . Tighten: 36 N.m (27 lb ft)
2Seat Belt Retractor Bolt Tighten: 30 N.m (22 lb ft)
3Rear Center Seat Belt Retractor
CAUTION
Refer to Fastener Caution .

Scheme 10

Scheme 10: Rear Seat Center Retractor Side Belt Replacement (Wagon)
Scheme 10: Rear Seat Center Retractor Side Belt Replacement (Wagon)
CAUTION
Refer to Fastener Caution .

Removal Procedure

  1. Remove the rear shelf panel. Refer to «Rear Window Panel Trim Replacement (Sedan)»(/cadillac/cts/ii-2007-2014/remont/exteriorinterior-trim/#interior-trim-system-and-paneling) .
  2. Remove the bolt that retains the child tether anchor that is being serviced.
  3. Remove the child tether anchor from the vehicle.

Installation Procedure

Note. During 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 and tighten to 30 N.m (22 lb ft).
  3. Install the rear shelf trim panel. Refer to «Rear Window Panel Trim Replacement (Sedan)»(/cadillac/cts/ii-2007-2014/remont/exteriorinterior-trim/#interior-trim-system-and-paneling) .

Scheme 11

Scheme 11: Rear Seat Shoulder Belt Guide Replacement
Scheme 11: Rear Seat Shoulder Belt Guide Replacement
CalloutComponent Name
1Rear Seat Shoulder Belt Guide Retainer Procedure: Pull back the rear seat back bolster to allow easier access to the rear shoulder belt guide retainer.
2Rear Seat Shoulder Belt Guide Assembly

Note. If 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

WARNINGA 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.