SRS Precautions and Procedures

SRS Precautions and Procedures

General Precautions

Please read the following precautions carefully before performing the airbag system service. Observe the instructions described in this manual, or the airbags could accidentally deploy and cause damage or injuries.

• Except when performing electrical inspections, always turn the ignition switch OFF and disconnect the negative cable from the battery, and wait at least 3 minutes before beginning work.
  NOTE: The memory is not erased even if the ignition switch is turned OFF or the battery cables are disconnected from the battery.
  
• Use replacement parts which are manufactured to the same standards and quality as the original parts. Do not install used SRS parts from another vehicle. Use only new parts when making SRS repairs.
  
• Carefully inspect any SRS part before you install it.
  Do not install any part that shows signs of being dropped or improperly handled, such as dents, cracks or deformation.
  

 

• Before removing any of the SRS parts (including the disconnection of the connectors), always disconnect the SRS connector.
  
• Use only a digital multimeter to check the system. If it is not a Honda multimeter, make sure its output is 10 mA (0.01 A) or less when switched to the lowest value in the ohmmeter range. A tester with a higher output could cause accidental deployment and possible injury.
  
• Do not put objects on the front passenger's airbag.
  
• If the battery negative cable is disconnected, do the ETCS learn procedure.
  

Steering-related Precautions

Cable Reel Alignment

• Misalignment of the cable reel could cause an open in the wiring, making the SRS system and the horns inoperative. Center the cable reel whenever the following is performed.
  
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  • Installation of the steering wheel
    
  • Installation of the cable reel
    
  • Installation of the steering column
    
  • Other steering-related adjustment or installation
    
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• Do not disassemble the cable reel.
  
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• Do not apply grease to the cable reel.
  
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• If the cable reel shows any signs of damage, replace it with a new one. For example, it does not rotate smoothly.
  

Airbag Handling and Storage

Do not disassemble an airbag. It has no serviceable parts. Once an airbag has been deployed, it cannot be repaired or reused.

For temporary storage of the airbag during service, please observe the following precautions.

• Store the removed airbag with the pad surface up. Never put anything on the removed airbag.
  

 

• Keep free from any oil, grease, detergent, or water to prevent damage to the airbag assembly.
  

 

• Store the removed airbag on a secure, flat surface away from any high heat source (exceeding 200°F/ 93°C).
  

 

• Never perform electrical inspections to the airbags, such as measuring resistance.
  

• Do not position yourself in front of the airbag assembly during removal, inspection, or replacement.
  

 

• Refer to the scrapping procedures for disposal of the damaged airbag.
  

SRS Unit, Front Sensors and Side Impact Sensors

• Be careful not to bump or impact the SRS unit, front sensors or the side impact sensors whenever the ignition switch is ON (II), or for at least 3 minutes after the ignition switch is turned OFF.
  
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• During installation or replacement, be careful not to bump (by impact wrench, hammer, etc.) the area around the SRS unit, front sensors, and the side impact sensor. The airbags could accidentally deploy and cause damage or injury.
  

 

• After a collision in which the airbags were deployed, replace the SRS unit, front sensors, and other related components. After a collision in which a side airbag was deployed, replace the side impact sensor on the deployed side and the SRS unit. After a collision in which the airbags or the side airbags did not deploy, inspect for any damage or any deformation on the SRS unit, front sensors, and the side impact sensors. If there is any damage, replace the SRS unit and/or the side impact sensors.
  

 

• Do not disassemble the SRS unit or the side impact sensors.
  
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• Turn the ignition switch OFF, disconnect the battery negative cable and wait at least 3 minutes before beginning installation or replacement of the SRS unit, or disconnecting the connectors from the SRS unit.
  
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• Be sure the SRS unit and side impact sensors are installed securely with the mounting bolts torqued to 9.8 N·m (1.0 kgf·m, 7.2 lbf·ft)
  
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• Do not spill water or oil on the SRS unit or the side impact sensors, and keep them away from dust.
  
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• Store the SRS unit and the side impact sensors in a cool (less than 104°F/40°C) and dry (less than 80 % relative humidity, no moisture) area.
  

Wiring Precautions

SRS wiring can be identified by special yellow outer covering (except the SRS indicator circuit).
Observe the instructions described in this section.

• Never attempt to modify, splice, or repair SRS wiring.
  If there is an open or damage in SRS wiring, replace the harness.
  

 

• Be sure to install the harness wires so they do not get pinched or interfere with other parts.
  

 

• Make sure all SRS ground locations are clean, and grounds are securely fastened for optimum metal-to-metal contact. Poor grounding can cause intermittent problems that are difficult to diagnose.
  

Precautions for Electrical Inspections

• When using electrical test equipment, insert the probe of the tester into the wire side of the connector. Do not insert the probe of the tester into the terminal side of the connector, and do not tamper with the connector.
  

 

• Use a U-shaped probe. Do not insert the probe forcibly.
  

 

• Use specified service connectors in troubleshooting.
  Using improper tools could cause an error in inspection due to poor metal-to-metal contact.
  

Spring-loaded Lock Connector

Some SRS system connectors have a spring-loaded lock.

Front Airbag Connectors:

Disconnecting

To release the lock, pull the spring-loaded sleeve (A) toward the stop (B) while holding the opposite half of the connector. Then pull the connector halves apart. Be sure to pull on the sleeve and not on the connector half.

 

Connecting

1.	To reconnect, hold the pawl-side connector half, and press on the back of the sleeve-side connector half in the direction shown. As the two connector halves are pressed together, the sleeve (A) is pushed back by the pawl (C). Do not touch the sleeve.   CA

2.	When the connector halves are completely connected, the pawl is released, and the spring-loaded sleeve locks the connector.

Side Airbag Connector:

Disconnecting

To release the lock, pull the spring-loaded sleeve (A) and the slider (B) while holding the opposite half of the connector. Then pull the connector halves apart. Be sure to pull on the sleeve and not on the connector half.

 

Connecting

Hold both connector halves, and press them firmly together until the projection (C) of the sleeve-side connector clicks.

 

Re opening the SRS Unit circuit for diagnosis

NOTE

• To prevent damage of the connector cavity, insert the special tool straight into cavity from the terminal side.
  
• Before installing the special tool, wash it with neutral detergent, then air blow dry.
  
• Do not use special tool if damaged.
  
• Make sure to remove the special tool before re-connecting.
  

When the SRS unit connector is disconnected, a short circuit will be created in the connector by own its function to prevent an airbag deployment. The circuit needs to be open sometimes when diagnosis is performed on the system.
Insert the special tool (s) (No. 070AZ-SAA0100) in the above of specified cavities when it is necessary to re-open the circuit for diagnosis.

 

Backprobing Spring-loaded Lock Connectors

When checking voltage or resistance on this type of connector the first time, you must remove the retainer to insert the tester probe from the wire side.

NOTE: It is not necessary to reinstall the removed retainer; the terminals will stay locked in the connector housing.

 

To remove the retainer (A), insert a flat-tip screwdriver (B) between the connector body and the retainer, then carefully pry out the retainer. Take care not to break the connector.

 

Seats with Side Airbags

Seats with side airbags have a ‘‘SIDE AIRBAG'' label on the seat-back. Because the component parts (seat-back cover, cushion, etc.) of seats with and without airbags are different, make sure you install only the correct replacement parts.

 

• When cleaning, do not saturate the seat with liquid, and do not spray steam on the seat.
  
• Do not repair a torn or frayed seat-back cover. Replace the seat-back cover.
  
• After a collision in which the side airbag was deployed, replace the side airbag with new parts. If the seat-back cushion is split, it must be replaced. If the seat-back frame is deformed, it must be replaced.
  
• Never put aftermarket accessories on the seat (covers, pads, seat heaters, lights, etc.).
  

Disconnecting the Airbag Connectors, Side Airbag Connectors, and Seat Belt Tensioner Connectors

Before removing a front airbag, side airbag or other SRS related devices (the SRS unit, the cable reel, the side impact sensors, and the seat belt tensioner connector), disconnecting connectors from related devices, or removing the dashboard or the steering column, disconnect the airbag connectors or the side airbag connectors to prevent accidental deployment.
Turn the ignition switch OFF and disconnect the negative cable from the battery, and wait at least 3 minutes before beginning the following procedures.

• Before disconnecting the dashboard wire harness 18P connector (A) from the SRS unit, disconnect the driver's airbag 2P connector (C), the front passenger's airbag 2P connector (D), the left side seat belt tensioner 2P connector (F), and the right side seat belt tensioner 2P connector (G).
  
• Before disconnecting the floor wire harness 18P connector (I) from the SRS unit, disconnect both side airbag 2P connectors (J, K)
  
• Before disconnecting the cable reel 4P connector (B), disconnect the driver's airbag 2P connector (C).
  
• Before disconnecting the floor wire harness 4P connector (E), disconnect both seat belt tensioner 2P connectors (F, G).
  

 

1.	Disconnect the battery negative cable, and wait at least 3 minutes.

Driver's Airbag

2.	Remove the access panel (A) from the steering wheel, then disconnect the driver's airbag 2P connector (B) from the cable reel 2P connector (C).   ABC

Front Passenger's Airbag

3.	Remove the inner box, then disconnect the front passenger's airbag 2P connector (A) from the dashboard wire harness 2P connector (B).   BA

Side Airbag

4.	Disconnect both side airbag 2P connectors (A) from the floor wire harness 2P connectors (B).   BA

Seat Belt Tensioner

5.	Disconnect both seat belt tensioner 4P connectors (A) from the floor wire harness 4P connector (B).   AB

SRS Unit

6.	Disconnect the dashboard wire harness 28P connector (A) and floor wire harness 28P connector (B).   AB