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HOMESERVICE MANUALSJEEP2007GRAND CHEROKEE OVERLAND, 5.7 2, RWDREPAIR AND DIAGNOSIS (SINGLE PAGE)BODY & FRAMEDOOR LOCKSVEHICLE THEFT SECURITY SYSTEM - ELECTRICAL DIAGNOSTICSDTC TROUBLESHOOTINGB1A41-SECURITY TRANSMITTER SENSOR CIRCUIT OPENDIAGNOSTIC TEST
2007 Jeep Grand Cherokee Overland, 5.7 2, RWD

Diagnostic Test

2007 Jeep Grand Cherokee Overland, 5.7 2, RWDSECTION Diagnostic Test
  1. 1) TEST FOR INTERMITTENT CONDITION 

    Turn the ignition on.

    With the scan tool, record and erase DTC's.

    Turn the ignition off and remove the key from the ignition.

    Close all doors and arm the VTSS and wait one minute.

    Disarm the VTSS turn the ignition on and wait one minute.

    With the scan tool, read DTC's.

    Does the scan tool display B1A41-SECURITY TRANSMITTER SENSOR CIRCUIT OPEN? 

    Yes 

    1. Go to step  2).

    No 

    1. The conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
    2. Perform BODY VERIFICATION TEST - VER 1 .
  2. 2) CHECK THE (A645) INTRUSION TRANSMITTER SENSOR SIGNAL CIRCUIT VOLTAGE 
    Fig 1: Checking Intrusion Transmitter Sensor Signal Circuit
    GC0045703Courtesy of CHRYSLER LLC

    Disconnect the Intrusion Sensor Transmitter connector.

    NOTE: Check connectors - Clean/repair as necessary.

    Turn the ignition on.

    With the scan tool actuate the Intrusion Sensor Transmitter.

    Measure the voltage between (A645) Intrusion Sensor Signal circuit and (G945) Sensor Ground circuit.

    Is the voltage above 10.0 volts 

    Yes 

    1. Go to step  3).

    No 

    1. Go to step  4).
  3. 3) CHECK THE INTRUSION SENSOR TRANSMITTER 

    Turn the ignition off.

    Install a known good Intrusion Sensor Transmitter.

    Turn the ignition on.

    With the scan tool erase DTC's.

    Turn the ignition off and remove the key from the ignition.

    Close all doors and arm the VTSS and wait one minute.

    Disarm the VTSS turn the ignition on and wait one minute.

    With the scan tool, read DTC's.

    Does the scan tool display B1A41-SECURITY TRANSMITTER SENSOR CIRCUIT OPEN? 

    Yes 

    1. Replace the Intrusion Transceiver Module in accordance with the Service Information.
    2. Perform BODY VERIFICATION TEST - VER 1 .

    No 

    1. Replace the original Intrusion Sensor Transmitter.
    2. Perform BODY VERIFICATION TEST - VER 1 .
  4. 4) CHECK THE (A645) INTRUSION TRANSMITTER SENSOR SIGNAL WIRE 
    Fig 2: Checking Intrusion Transmitter Sensor Signal Circuit
    GC0045704Courtesy of CHRYSLER LLC

    Turn the ignition off.

    Disconnect the Intrusion Transceiver Module connector.

    Measure the resistance of the (A645) Intrusion Transmitter Sensor Signal circuit between the Intrusion Sensor Transmitter connector and the Intrusion Transceiver Module connector.

    Is the resistance below 5.0 ohms? 

    Yes 

    1. Repair the (A645) Intrusion Transmitter Sensor Signal circuit for an open.
    2. Perform BODY VERIFICATION TEST - VER 1 .

    No 

    1. Go to step  5).
  5. 5) CHECK THE (G945) SENSOR GROUND WIRE FOR AN OPEN 
    Fig 3: Checking Sensor Ground Circuit
    GC0045705Courtesy of CHRYSLER LLC

    Ensure Ignition off.

    Measure the resistance of the (G945) Sensor Ground circuit from the Intrusion Sensor Transmitter connector to the Intrusion Transceiver Module connector.

    Is the resistance below 5.0 ohms? 

    Yes 

    1. Replace the Intrusion Transceiver Module in accordance with the Service Information.
    2. Perform BODY VERIFICATION TEST - VER 1 .

    No 

    1. Repair the (G945) Sensor Ground circuit for an open.
    2. Perform BODY VERIFICATION TEST - VER 1 .
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.