Air Bag Systems: Service Precautions

AIR BAG AND SAFETY BELT PRETENSIONER SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

See Mazda Truck Wiring Diagrams.

Restraint System Diagnostic Tool Warning

WARNING: Remove restraint system diagnostic tools from the vehicle prior to road testing. If tools are not removed, the supplemental restraint system (SRS) device may not deploy in a crash. Failure to follow this instruction may result in serious personal injury or death in a crash and possibly violate vehicle safety standards.

Air Bag Module Second Stage Deployment Check
Because the driver and passenger front air bags each have 2 deployment stages, it is possible that Stage 1 has deployed and Stage 2 has not. If a front air bag module has deployed, it is mandatory that the front air bag module be remotely deployed using the appropriate air bag disposal procedure.
- For additional information on driver or passenger air bag module remote deployment. See PYROTECHNIC DEVICE DISPOSAL.

Diagnosing Customer Concerns with Continuous Memory Diagnostic DTCs
If an air bag warning indicator ON is reported by the customer but is not present when the vehicle comes in for service, follow the Diagnostic Instruction procedures in this section to identify the intermittent DTC. Once the DTC is known, read the Normal Operation section of the pinpoint test for the DTC involved.
- Follow the depowering procedure as directed in this section.
- Determine the location of components involved in creating the DTC.
- Carry out a thorough visual inspection of:
- components.
- connectors.
- splices and wiring harnesses.
- insulation on conductors.

Refer to the Possible Causes section of the pinpoint test for the DTC involved, which lists the common concerns that relate to the DTC. Concerns are listed according to priority.

Diagnosing Customer Concerns with Hard DTCs
Most supplemental restraint system (SRS) diagnostic procedures will require deactivation and reactivation or depowering and repowering of the system. Deactivation and reactivation requires the disconnection of most SRS components and the installation of restraint system diagnostic tools. Depowering and repowering requires disconnecting the battery and removal of the restraints control module (RCM) fuse. This reduces the risk of inadvertent deployment of SRS components while diagnostic procedures are being carried out. Restraint system diagnostic tools are required for the diagnosis and testing of the SRS. It is not acceptable to short-circuit the air bag module connections with a jumper wire. If a jumper wire is used to short-circuit the air bag module connections, a fault code (DTC) will be displayed.

Prove Out Procedure
Turn the ignition switch from the OFF to the ON position and visually monitor the air bag warning indicator with all SRS components connected or restraint system diagnostic tools installed. The air bag warning indicator will light continuously for approximately 6 seconds and then turn off. If an SRS fault is present, the air bag indicator will:
- fail to light.
- remain lit continuously.
- flash at a 5 Hz rate (RCM not configured).

The air bag indicator may not illuminate until approximately 30 seconds after the ignition switch has been turned from the OFF to the ON position. This is the time required for the RCM to complete the testing of the SRS. If the air bag indicator is inoperative and an SRS fault exists, a chime will sound in a pattern of 5 sets of 5 beeps. If this occurs, the air bag indicator will need to be repaired before diagnosis can continue.

Glossary

Secondary Air Bag Warning
The secondary air bag warning is an audible fault format that consists of 5 sets of 5 tone bursts, with each set of 5 tone bursts separated by a 5-second quiet period. One tone burst cycle will consist of one-second ON and one-second OFF. This tone pattern will repeat periodically until the SRS problem and warning indicator concern are resolved.

Air Bag/Pretensioner Restraint System Diagnostic Tools
Air bag/pretensioner restraint system diagnostic tools are used to simulate the equivalent resistance of deploy-able/pyrotechnic devices during certain diagnostic procedures.

Disconnect the Component
Disconnect the component means to disconnect the component vehicle harness connector, not to remove the component. Do not reconnect a disconnected component unless instructed to do so.

Deactivate the Supplemental Restraint System (SRS)
Deactivate the SRS means to carry out a deactivation procedure. See SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEACTIVATION AND REACTIVATION.

Depower the Supplemental Restraint System (SRS)
Depower the SRS means to disconnect the battery and remove restraints control module (RCM) fuse. See DEPOWERING AND REPOWERING.

Prove Out the Supplemental Restraint System (SRS)
Prove out the SRS means to turn the ignition switch from the OFF to the ON position and visually monitor the air bag warning indicator with all supplemental restraint system (SRS) components connected. The air bag warning indicator will light continuously for approximately 6 seconds and then turn off. If an SRS fault is present, the air bag warning indicator will either fail to light, flash or remain lit continuously. The air bag warning indicator may not illuminate until approximately 30 seconds after the ignition switch has been turned from the OFF to the ON position. This is the time required for the restraints control module (RCM) to complete the testing of the SRS. If the air bag warning indicator is inoperative and an SRS fault exists, a chime will sound in a pattern of 5 sets of 5 beeps. If this occurs, the air bag warning indicator will need to be repaired before diagnosis can continue. Refer to Prove Out Procedure.

Reactivate the Supplemental Restraint System (SRS)
Reactivate the SRS means to carry out the reactivation procedure. See SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEACTIVATION AND REACTIVATION.

Repower the Supplemental Restraint System (SRS)
Repower the SRS means, turn the ignition ON, install the restraints control module (RCM) fuse and connect the battery ground cable. See DEPOWERING AND REPOWERING.

Reconnect the Supplemental Restraint System (SRS)
Reconnect the SRS means to reconnect all system components. Refer to Air Bag System Reconnect Checklist.

Install a New Component
Install a new component means to remove the existing component and install a new authorized part obtained from Mazda Customer Service Division.

Verify the System
Verify the system means to prove out the system with restraint system components in place.

Air Bag Reconnect Checklist
The checklist below should be completed following diagnosis or repair of any air bag system concern:
- All in-seat harness connectors connected?
- Clockspring connectors connected?
- Occupant classification sensor (OCS) system connected?
- Passenger air bag deactivation (PAD) indicator connected?
- All air bag modules connected?
- All safety belt pretensioner connectors connected?
- All sensors (front impact, driver seat position and safety belt tension) connected?
- Restraints control module (RCM) connected?
- RCM fuse installed?
- Battery connected?