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Home >> Chrysler >> 2011 >> 300 C, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 60 (Occupant Restraint Controller (Orc) - Electrical Diagnostics) >> Diagnosis and Testing >> U0170-00-Lost Communication W/ Up-Front Left Satellite Sensor >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2011 RAM Pickup and 2011 RAM Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
  1. VERIFY ACTIVE DTC 
    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.

    NOTE:

    Using the wiring diagram/schematic as a guide check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.

    NOTE:

    If after the harness inspection it appears the impact sensor connector is only seated halfway. Reseat the harness connector into the impact sensor and lock the tab. Follow the instructions below checking for active codes.

    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.

    NOTE:

    Make sure the battery is fully charged.

    1. Turn the ignition on.
    2. With the scan tool, read ORC DTCs.

      Does the scan tool display active U0170-00-LOST COMMUNICATION W/ UP-FRONT LEFT SATELLITE SENSOR - DTC?

      Yes 

      • Go To  2.

      No 

  2. CHECK THE (R79, R81) LEFT FRONT IMPACT SENSOR CIRCUITS FOR A SHORT TO VOLTAGE 
    Fig 1: Checking Left Front Impact Sensor Circuit For Short To Voltage
    GC0137208Courtesy of CHRYSLER LLC
    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 Front Impact Sensor harness connector.
    2. Disconnect the ORC harness connectors.
      NOTE:

      Check connectors - Clean and repair as necessary.

      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. Measure the voltage of the (R79) Left Front Impact Sensor Signal circuit cavity 2 and (R81) Left Front Impact Sensor Ground circuit cavity 1 at the Left Front Impact Sensor harness connector.

      Is there any voltage present?

      Yes 

      • Repair the (R79, R81) Left Front Impact Sensor circuits for a short to voltage.
      • Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Refer to Standard Procedure .

      No 

      • Go To  3.
  3. CHECK THE (R79, R81) LEFT FRONT IMPACT SENSOR CIRCUITS FOR A SHORT TO GROUND 
    Fig 2: Checking Left Front Impact Sensor Circuit
    GC0089829Courtesy of CHRYSLER LLC
    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 between ground and the (R79) Left Front Impact Sensor Signal circuit at the Left Front Impact Sensor harness connector cavity 2.
    2. Measure the resistance between ground and the (R81) Left Front Impact Sensor Ground circuit at the Left Front Impact Sensor harness connector cavity 1.

      Is the resistance below 100K Ohms?

      Yes 

      • Repair the (R79, R81) Left Front Impact Sensor circuits for a short to ground.
      • Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Refer to Standard Procedure .

      No 

      • Go To  4.
  4. CHECK THE (R79, R81) LEFT FRONT IMPACT SENSOR CIRCUITS FOR A SHORT TOGETHER 
    Fig 3: Checking Left Front Impact Sensor Circuit
    GC0089830Courtesy of CHRYSLER LLC
    1. Measure the resistance between the (R79) Left Front Impact Sensor Signal circuit and (R81) Left Front Impact Sensor Ground circuit at the Left Front Impact Sensor harness connector.

      Is the resistance below 100K Ohms?

      Yes 

      • Repair the (R79, R81) Left Front Impact Sensor circuits shorted together.
      • Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Refer to Standard Procedure .

      No 

      • Go To  5.
  5. CHECK THE (R81) LEFT FRONT IMPACT SENSOR GROUND CIRCUIT FOR AN OPEN OR HIGH RESISTANCE 
    Fig 4: Checking Left Front Impact Sensor Ground Circuit
    GC0089831Courtesy of CHRYSLER LLC
    1. Connect the SRS Load Tool Adapter (special tool #8443-24, 32-Way Adapter) to the ORC C1 harness connector.
    2. Measure the resistance of the (R81) Left Front Impact Sensor Ground circuit between the Left Front Impact Sensor harness connector cavity 1 and the SRS Load Tool Adapter (special tool #8443-24, 32-Way Adapter) cavity 22

      Is the resistance below 1 Ohm?

      Yes 

      • Go To  6.

      No 

      • Repair the (R81) Left Front Impact Sensor Ground circuit for an open or high resistance.
      • Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Refer to Standard Procedure .
  6. CHECK THE (R79) LEFT FRONT IMPACT SENSOR CIRCUIT FOR AN OPEN OR HIGH RESISTANCE 
    Fig 5: Checking Left Front Impact Sensor Circuit For Open Or High Resistance
    GC0137209Courtesy of CHRYSLER LLC
    1. Measure the resistance of the (R79) Left Front Impact Sensor Ground circuit between the Left Front Impact Sensor harness connector and the SRS Load Tool Adapter (special tool #8443-24, 32-Way Adapter) cavity C1-14.

      Is the resistance below 1 Ohm?

      Yes 

      • Go To  7.

      No 

      • Repair the (R79) Left Front Impact Sensor Signal circuit for an open or high resistance.
      • Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Refer to Standard Procedure .
  7. CHECK OPERATION OF THE LEFT FRONT IMPACT SENSOR 
    1. Replace the Left Front Impact Sensor in accordance with the Service Information.
    2. Reconnect the vehicle body harness connector 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.

      Does the scan tool display active U0170-00-LOST COMMUNICATION W/ UP-FRONT LEFT SATELLITE SENSOR - DTC?

      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 follow these instructions may result in possible serious or fatal injury.

      • Replace the ORC in accordance with Service Information.
      • Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Refer to Standard Procedure .

      No 

      • Repair is complete.
      • Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Refer to Standard Procedure .
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