Question about 1999 Jeep Grand Cherokee

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AIR BAG LIGHT AND CHIME RINGS PERIODICALLY

AIR BAG LITE ON DASH ILLUMINATES AND THE CHIME RINGS. LIGHT GOES BACK OFF AFTER 10 SECONDS OR SO AND THEN REPEATS. THE DURATION BETWEEN OCCURRENCES IS RANDOM SOME WHERE BETWEEN SECONDS AND MINUTES. NO APPARENT CAUSE TO INITIATE THE INTERMITTENT LIGHT.
Not sure where the circuit or the chime is physically located. This problem was a recall by jeep on some vehicles but my 1999 Grand cherokee Laredo is not listed as one of the vehicles by VIN #, per the dealer.
help please Don Doty

Posted by drd1624222 on

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Anonymous

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I have a 2002 jeep grand cherokee Limited and Had similar problem. Found out that a wire/connection harness had gotten cut under PASSENGER seat.from seats moving back and forth. It's part of the airbag system, it tells airbag system if seatbelt is fastened and if occupant is in seat. Since the wire is broken, it can't report back to air back system and activates the light. try this, hope it helps.

Posted on Sep 18, 2009

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Prove Out Procedure
Turn the ignition switch from the OFF to the RUN position and visually monitor the air bag indicator with the air bag modules or restraint system diagnostic tools installed. The air bag indicator will light continuously for approximately six seconds and then turn off. If an air bag supplemental restraint system (SRS) fault is present, the air bag indicator will either:
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  • remain lit continuously.
  • flash.
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----------------------------------------------------------- Restraints Control Module (RCM)
The restraints control module (RCM) performs the following functions:
  • signals the inflators to deploy the air bags in the event of a deployable crash.
  • monitors the air bag supplemental restraint system (SRS) for faults.
  • illuminates the air bag indicator if a fault is detected.
  • flashes the air bag indicator to indicate the lamp fault code (LFC) detected.
  • communicates through the data link connector (DLC) the current or historical diagnostic trouble codes (DTCs).
  • signals the generic electronic module (GEM) to activate a chime if the air bag indicator is not available and another SRS fault exists.
NOTE: The safing sensor is internal to the RCM and is not repaired 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 illuminate the air bag indicator located in the instrument cluster.
When the ignition is cycled (turned off and then on), the air bag indicator will begin its prove out sequence. During prove out the air bag indicator will illuminate for six seconds, go off for two seconds and then, if a system fault exists, flash the two-digit LFC. The air bag indicator will flash the LFC five times, then it will remain illuminated for the rest of the key cycle. The RCM will also communicate the current and historical DTCs through the DLC, using a scan tool. If the air bag indicator does not function, and the system detects a fault condition, the RCM will signal the GEM to activate an audible chime. The chime is a series of five sets of five tone bursts. If the chime is heard, the SRS and 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 safing and air bag sensors determine that 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):
  • is powered from the battery through the ignition circuit.
  • provides the electrical path from the restraints control module (RCM) to the air bag modules.
  • provides the electrical path from the RCM to the air bag indicator.
  • provides the electrical path from the RCM to the data link connector (DLC).
  • provides the electrical path from the RCM to the generic electronic module (GEM).
----------------------------------------------------------
Restraints Control Module (RCM) Diagnostic Trouble Code (DTC) Priority Table DTC a LFC b LFC Priority Description Action To Take — — 1 The Air Bag Indicator is Illuminated Continuously — RCM Disconnected, Inoperative, or Lost/Low Ignition Feed Go To Pinpoint Test A . B1342 24 2 RCM Is Faulted INSTALL a new RCM. B1231 19 3 RCM Crash Data Memory Full INSTALL a new RCM. B1921 21 4 RCM Bracket Ground Resistance High Go To Pinpoint Test B . C1414 29 5 Incorrect Vehicle Identification Code Go To Pinpoint Test C . B1887 15 6 Driver Air Bag Circuit Shorted to Ground B1916 15 7 Driver Air Bag Circuit Shorted to Battery or Ignition B1888 16 8 Passenger Air Bag Circuit Shorted to Ground B1925 16 9 Passenger Air Bag Circuit Shorted to Battery or Ignition B1932 32 10 Driver Air Bag Circuit Resistance High B1933 33 11 Passenger Air Bag Circuit Resistance High B1934 34 12 Driver Air Bag Circuit Resistance Low B1935 35 13 Passenger Air Bag Circuit Resistance Low B1892 — 17 Air Bag Tone Warning Indicator Circuit Shorted to Ground or Open B1891 — 18 Air Bag Tone Warning Indicator Circuit Shorted to Battery or Ignition B1869 Tone c 19 Air Bag Indicator Inoperative B1870 Tone c 20 Air Bag Indicator Shorted to Battery — — — No Communication with the Restraints Control Module

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I have a '99 jeep and the air bag light stays on. First you hear the chime and then the light will stay on. I believe it's a connection somewhere because it used to chime and go off. Then it would...


Theres a malfunction in one of the sensors out side of the car.Vibrations may make them work and then not work..That you will need to get scanned from a tech. Because there really touch and dont take much to set them off..Hope this helps.Have a great day...

I’m happy to assist further over the phone at https://www.6ya.com/expert/joe_a3369546f8067589

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1 Answer

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------------------------------------------------------------------------------------------
Prove Out the System
Prove out the system means to turn the ignition switch from the OFF to the RUN position and visually monitor the air bag indicator with the air bag modules installed. The air bag indicator will light continuously for approximately six seconds and then turn off. If an air bag supplemental restraint system (SRS) fault is present, the air bag indicator will either:
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----------------------------------------------------------------------------------------
Active Commands
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