very old post... choices?? i will try to help others fix ALARMS.
Jeep WK. 2005 to 2010
what id do? , is never set it. or defeat it. (ask)( the oper,guide tells this)
but if it MUST work
than it must be fixed.
the dealer would use a scan tool , see no errors and replace something exensive, then it fails again. the endless story of alarms.
in your case he'd install the TSB fix first.
He'd use a DRBIII scan tool to find the offending input.
The BCM (body puter ) gets the sensor inputs belowL
The BCM receives the ajar switch signals on the following circuits.
- Circuit G75 provides left front door ajar switch signal
- Circuit G74 provides right front door ajar switch signal
- Circuit G77 provides left rear door ajar switch signal
- Circuit G76 provides right rear door ajar switch signal
- Circuit G78 provides liftgate ajar and liftglass ajar signals.
the hardest problems are always intermittants.
Intermittent alarms and stalling engines, tops list.
finding it? , with out sleeping in the car is a big problem.
also there is TSB on this.
Swing gate open alarm.
the hard part, is finding out which inputs is (was) failing.
in my car i can find it with a scan tool .
newer cars store the failed input in the PCM memory. as a DTC.
In my shop I have a CAN-BUSS monitoring tool that allows me
to see live AJAR messages and logs them to the laptop, HDD.
for later analysis. (ok the lift gate failed at 3am, bingo)
my 2008 logs, DTCS like this.
B1820-HOOD AJAR INPUT CIRCUIT HIGH (and all others)
i have a scan tool that can see that , called a innova 3160
a $200 tool,
I have 2 ways to find intermittent in my newer jeep
FSM quotes with comments.
VTSS VERIFICATION TEST - 1A
1. Perform VTSS Verification Test
- Open the driver door and roll down the window.
- Remove the ignition key (but keep in hand).
- Lock the doors with RKE transmitter or power door lock switch.
- Ensure all doors, tailgate, and tailgate flip-up glass are closed.
- If the VTSS Indicator Lamp flashes rapidly and after approximately 16 seconds changes to a slower flash, the system is operational. However, If the indicator fails to flash as described, there is a problem with the system.
- comment: gee, attempt to rattle all doors, and see if VTSS sees a failure. all doors, lift gate and hood, (if car has hood switch)
the FSM shows the B1xx and B2xxx codes for alarms.
only a scan tool can do that. mine can,
you can also rent cheap CAN-BUS scan tools, from most good
that should cover most alarming issues.
but here is one better for older jeeps.
see matrix table for coverage by body type.