Tribute DX 4WD V6-3.0L DOHC (2002)
As part of the supplemental restraint system (SRS), the safety belt buckles are equipped with pretensioners. The safety belt buckle pretensioners remove
excess slack from the safety belt webbing. The pretensioners are activated by the restraints control module (RCM) when the module detects a crash event
force exceeding a programmed unit.
Restraints Control Module (RCM)
The restraints control module (RCM) carries out the following functions:
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signals the inflators to deploy the air bags in the event of a deployable crash
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monitors the air bag supplemental restraint system (SRS) for faults
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illuminates the air bag indicator if a fault is detected
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flashes the air bag indicator to indicate the lamp fault code (LFC) detected
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communicates through the data link connector (DLC) the current or historical Diagnostic Trouble Codes (DTCs)
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signals the instrument cluster to activate a chime if the air bag indicator is not available and another SRS fault exists
NOTE: The safety sensor is internal to the RCM and is not serviced separately.
The RCM monitors the SRS for possible faults. If a fault is detected while the ignition switch is in the RUN position, the RCM will flash the air bag
indicator located in the instrument cluster.
When the ignition is cycled (turned off and then on), the air bag indicator will prove out by lighting for six seconds and then off for two seconds. After
the prove out, the air bag indicator will then flash the two-digit LFC for any current SRS fault. If an SRS fault exists, the air bag indicator will flash the
LFC five times, and then remain illuminated for the rest of the key cycle. The RCM will also communicate the current and historical DTCs through the
DLC, to the scan tool. If the air bag indicator does not function., and the system detects a fault condition, the RCM will signal the instrument cluster to
activate an audible chime. The chime is a series of five sets of five tone bursts. If the chime is heard, the SRS arid the air bag indicator require repair.
LFCs are prioritized. If two or more faults occur at the same time, the fault having the highest priority will be displayed. After that fault has been
corrected, the next highest priority fault will be displayed.
The RCM includes a backup power supply. This feature provides sufficient backup power to deploy the air bags in the event that the ignition circuit is
damaged in a collision before the sating and air bag sensors determine that a deployment is required. The backup power supply will deplete its stored
energy approximately one minute after the battery ground cable is disconnected.
Electrical System
The electrical system that supports the air bag supplemental restraint system (SRS):
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is powered from the battery through the ignition circuit.
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provides the electrical path from the restraints control module (RGM) to the air bag modules.
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provides the electrical path from the restraints control module (RCM) to the side crash sensors (if equipped).
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provides the electrical path from the RCM to the air bag indicator.
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provides the electrical path from the RCM to the data link connector (DLC).
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provides the electrical path from the RCM to the generic electronic module (GEM).
Sensors
WARNING: The restraints control module (RCM) orientation is critical for correct system operation. If a vehicle equipped with an air bag
supplemental restraint system (SRS) has been involved in a collision in which the center tunnel area has been damaged, inspect the mounting
and bracket for deformation. If damaged, the RCM must be replaced whether or not the air bags have deployed. In addition, make sure the
area of the RCM mounting is restored to its original condition.
For this vehicle, the SRS employs three crash sensors. One of the sensors is integral to the RCM and is not serviceable separately. In addition, there are
two side crash sensors located in the LH and RH B-pillars. The RCM is mounted on the center tunnel under the instrument panel. Mounting orientation is
critical for correct operation of all crash sensors.
