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Home >> Jeep >> 2017 >> Wrangler Sahara, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 99 (Occupant Restraint Controller (Orc) - DTCS B2207 To U1476-00) >> DTC Troubleshooting >> U11F1-00-Lost Communication With Right Impact Pressure Sensor >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2017 Jeep Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
  1. DETERMINE ACTIVE OR STORED DTC 
    1. Turn the ignition on.
    2. With the scan tool, read ORC DTCs.
      NOTE:

      Make sure the battery is fully charged.

      Does the scan tool display an active: U11F1-00-LOST COMMUNICATION WITH RIGHT IMPACT PRESSURE SENSOR - DTC?

      Yes 

      • Go To  2

      No 

  2. CHECK THE (R140), (R160) RIGHT SIDE IMPACT PRESSURE SENSOR SIGNAL AND GROUND CIRCUITS FOR A SHORT TO VOLTAGE 
    WARNING:

    Turn the ignition off disconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.

    1. Disconnect the Right Side Impact Pressure Sensor harness connector.
    2. Disconnect the ORC harness connector.
      WARNING:

      Turn the ignition on, then reconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.

    3. Connect the (special tool #8443-57, Adapter, Supplemental Restraint System Load Tool) to the ORC C1 and C2 harness connectors.
    4. Measure the voltage of the (R140) Right Side Impact Pressure Sensor Signal circuit and (R160) Right Side Impact Pressure Sensor Ground circuit between the (special tool #8443-57, Adapter, Supplemental Restraint System Load Tool) the C1B-34 and C1B-35 terminals and ground.

      Is there any voltage present?

      Yes 

      • Repair the (R140), (R160) Right Side Impact Pressure Sensor circuits for a short to voltage.
      • Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Refer to RESTRAINTS SYSTEM VERIFICATION TEST .

      No 

      • Go To  3
  3. CHECK THE (R140) RIGHT SIDE IMPACT PRESSURE SENSOR SIGNAL CIRCUIT FOR A SHORT TO GROUND 
    WARNING:

    Turn the ignition off disconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.

    1. Measure the resistance of the (R140) Right Side Impact Pressure Sensor Signal circuit between the (special tool #8443-57, Adapter, Supplemental Restraint System Load Tool) the C1B-35 terminals and ground.

      Is the resistance below 20 Ohms?

      Yes 

      • Repair the (R140) Right Side Impact Pressure Sensor Signal circuit for a short to ground.
      • Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Refer to RESTRAINTS SYSTEM VERIFICATION TEST .

      No 

      • Go To  4
  4. CHECK THE (R140), (R160) RIGHT SIDE IMPACT PRESSURE SENSOR CIRCUITS FOR A SHORT TOGETHER 
    1. Measure the voltage of the (R140) Right Side Impact Pressure Sensor Signal circuit and (R160) Right Side Impact Pressure Sensor Ground circuits between the (special tool #8443-57, Adapter, Supplemental Restraint System Load Tool) the C1B-34 and C1B-35 terminals.

      Is the resistance below 20 Ohms?

      Yes 

      • Repair the (R140), (R160) Right Side Impact Pressure Sensor circuits shorted together.
      • Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Refer to RESTRAINTS SYSTEM VERIFICATION TEST .

      No 

      • Go To  5
  5. CHECK THE (R160) RIGHT SIDE IMPACT PRESSURE SENSOR GROUND CIRCUIT FOR AN OPEN OR HIGH RESISTANCE 
    1. Measure the resistance of the (R160) Right Side Impact Pressure Sensor Ground circuit between the (special tool #8443-57, Adapter, Supplemental Restraint System Load Tool) the C1B-34 terminals and Right Side Impact Pressure Sensor harness connector terminal 2.

      Is the resistance below 1 Ohm?

      Yes 

      • Go To  6

      No 

      • Repair the (R160) Right Side Impact Pressure Sensor Ground circuit for an open or high resistance.
      • Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Refer to RESTRAINTS SYSTEM VERIFICATION TEST .
  6. CHECK THE (R140) RIGHT SIDE IMPACT PRESSURE SENSOR SIGNAL CIRCUIT FOR AN OPEN OR HIGH RESISTANCE 
    1. Measure the resistance of the (R140) Right Side Impact Pressure Sensor Signal circuit between the (special tool #8443-57, Adapter, Supplemental Restraint System Load Tool) the C1B-35 terminals and Right Side Impact Pressure Sensor harness connector terminal 1.

      Is the resistance below 1 Ohm?

      Yes 

      • Go To  7

      No 

      • Repair the (R140) Right Side Impact Pressure Sensor Signal circuit for an open or high resistance.
      • Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Refer to RESTRAINTS SYSTEM VERIFICATION TEST .
  7. CHECK OPERATION OF THE RIGHT SIDE IMPACT PRESSURE SENSOR 
    1. Replace the Right Side Impact Pressure Sensor. Refer to SENSOR, IMPACT, REMOVAL .
    2. Reconnect the vehicle body harness to the impact sensor.
    3. Remove any special tools or jumper wires and reconnect all previously disconnected components - except the Battery.
      WARNING:

      Turn the ignition on, then reconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.

    4. Connect the scan tool to the Data Link Connector - use the most current software available.
    5. Use the scan tool and erase the stored codes in all airbag system modules.
    6. Turn the Ignition Off, and wait 15 seconds before turning the Ignition On.
    7. Wait one minute, and read active codes and if there are none present read the stored codes.

      Did the active U11F1-00-LOST COMMUNICATION WITH RIGHT IMPACT PRESSURE SENSOR return?

      Yes 

      WARNING:

      Turn the ignition off, disconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.

      WARNING:

      If the Occupant Restraint Controller (ORC) is dropped at any time, it must be replaced. Failure to take the proper precautions can result in accidental airbag deployment. Failure to follow these instructions may result in possible serious or fatal injury.

      No 

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