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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. CHECK FOR AN ACTIVE 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: U11EB-00-LOST COMMUNICATION WITH LEFT C-PILLAR IMPACT ACCELERATION SENSOR - DTC?

      Yes 

      • Go To  2

      No 

  2. CHECK THE (R17) AND (R19) LEFT SIDE IMPACT SENSOR 2 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 Left Side Impact Sensor 2 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 (R17) Left Side Impact Sensor 2 Signal circuit and (R19) Left Side Impact Sensor 2 Ground circuit between the (special tool #8443-57, Adapter, Supplemental Restraint System Load Tool) the C1B-53 and C1B-54 terminals and ground.

      Is there any voltage present?

      Yes 

      • Repair the (R17) and (R19) Left Side Impact Sensor 2 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 (R17) LEFT SIDE IMPACT SENSOR 2 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 (R17) Left Side Impact Sensor 2 Signal circuit between the (special tool #8443-57, Adapter, Supplemental Restraint System Load Tool) the C1B-53 terminals and ground.

      Is the resistance below 20 Ohms?

      Yes 

      • Repair the (R17) Left Side Impact Sensor 2 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 (R17) AND (R19) LEFT SIDE IMPACT SENSOR 2 CIRCUITS FOR A SHORT TOGETHER 
    1. Measure the voltage of the (R17) Left Side Impact Sensor 2 Signal circuit and (R19) Left Side Impact Sensor 2 Ground circuits between the (special tool #8443-57, Adapter, Supplemental Restraint System Load Tool) the C1B-53 and C1B-54 terminals.

      Is the resistance below 20 Ohms?

      Yes 

      • Repair the (R17) and (R19) Left Side Impact Sensor 2 circuits shorted together.
      • Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Refer to RESTRAINTS SYSTEM VERIFICATION TEST .

      No 

      • Go To  5
  5. CHECK THE (R19) LEFT SIDE IMPACT SENSOR 2 GROUND CIRCUIT FOR AN OPEN OR HIGH RESISTANCE 
    1. Measure the resistance of the (R19) Left Side Impact Sensor 2 Ground circuit between the (special tool #8443-57, Adapter, Supplemental Restraint System Load Tool) the C1B-54 terminals and Left Side Impact Sensor 2 harness connector terminal 2.

      Is the resistance below 1 Ohm?

      Yes 

      • Go To  6

      No 

      • Repair the (R19) Left Side Impact Sensor 2 Ground circuit for an open or high resistance.
      • Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Refer to RESTRAINTS SYSTEM VERIFICATION TEST .
  6. CHECK THE (R17) LEFT SIDE IMPACT SENSOR 2 SIGNAL CIRCUIT FOR AN OPEN OR HIGH RESISTANCE 
    1. Measure the resistance of the (R17) Left Side Impact Sensor 2 Signal circuit between the (special tool #8443-57, Adapter, Supplemental Restraint System Load Tool) the C1B-53 terminals and Left Side Impact Sensor 2 harness connector terminal 1.

      Is the resistance below 1 Ohm?

      Yes 

      • Go To  7

      No 

      • Repair the (R17) Left Side Impact Sensor 2 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 LEFT SIDE IMPACT SENSOR 2 
    1. Replace the Left Side Impact Sensor 2. 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 U11EB-00-LOST COMMUNICATION WITH LEFT C-PILLAR IMPACT ACCELERATION SENSOR return?

      Yes 

      • Go To  8

      No 

  8. CHECK RELATED HARNESS CONNECTIONS 
    WARNING:

    Turn the ignition off, disconnect the 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 could result in accidental airbag deployment. Failure to follow these instructions may result in possible serious or fatal injury.

    1. Disconnect all Occupant Restraint Controller(ORC) harness connectors.
    2. Disconnect all related in-line harness connections (if equipped).
    3. Disconnect the related component harness connectors.
    4. Inspect harness connectors, component connectors, and all male and female terminals for the following conditions:
      • Proper connector installation.
      • Damaged connector locks.
      • Corrosion.
      • Other signs of water intrusion.
      • Weather seal damage (if equipped).
      • Bent terminals.
      • Overheating due to a poor connection (terminal may be discolored due to excessive current draw).
      • Terminals that have been pushed back into the connector cavity.
      • Check for spread terminals and verify proper terminal tension.

      Repair any conditions that are found.

    5. Connect all Occupant Restraint Controller(ORC) harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
    6. Connect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
    7. Connect all related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
    8. With the scan tool, erase DTCs.
    9. Test drive or operate the vehicle in accordance with the when monitored and set conditions.
    10. With the scan tool, read DTCs.

      Did the DTC return?

      Yes 

      No 

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