Diagnostic Test

VERIFY THAT DTC B1B70-UP-FRONT LEFT SATELLITE ACCELERATION SENSOR INTERNAL IS ACTIVE
NOTE: Ensure the battery is fully charged.
1. Turn the ignition on.
2. With the scan tool, read ORC DTCs.
  Does the scan tool display active: B1B70-UP-FRONT LEFT SATELLITE ACCELERATION SENSOR INTERNAL?
  
  Yes
  - Go to step 2
  No
  - Go to step 9
CHECK THE (R79, R81) FRONT LEFT IMPACT SENSOR SIGNAL AND GROUND CIRCUITS FOR A SHORT TO BATTERY

Fig 1: Checking Front Left Impact Sensor Signal & Ground Circuits For A Short To Battery
Courtesy 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 Front Left Impact Sensor connector.
2. Disconnect the ORC connector.
  WARNING: Turn the ignition on, then reconnect the 12-volt battery. 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) Front Left Impact Sensor Signal circuit and (R81) Sensor Ground circuit at the Front Left Impact Sensor connector and ground.
  Is there any voltage present?
  
  Yes
  - Repair the (R79, R81) Front Left Impact Sensor circuits for a short to battery.
  - Perform the AIRBAG SYSTEM VERIFICATION TEST. See DTC-Based Diagnostics/CONTROLLER, Occupant Restraint (ORC) - Standard Procedure .
  No
  - Go to step 3
CHECK THE (R79) FRONT LEFT IMPACT SENSOR SIGNAL CIRCUIT FOR A SHORT TO GROUND

Fig 2: Checking Front Left Impact Sensor Signal Circuit For A Short To Ground
Courtesy 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 of the (R79) Front Left Impact Sensor Signal circuit between the Front Left Impact Sensor connector and ground.
  Is the resistance below 100K ohms?
  
  Yes
  - Repair the (R79) Front Left Impact Sensor Signal circuit for a short to ground.
  - Perform the AIRBAG SYSTEM VERIFICATION TEST. See DTC-Based Diagnostics/CONTROLLER, Occupant Restraint (ORC) - Standard Procedure .
  No
  - Go to step 4
CHECK THE (R79, R81) FRONT LEFT IMPACT SENSOR CIRCUITS FOR A SHORT TOGETHER

Fig 3: Checking Front Left Impact Sensor Circuits For A Short Together
Courtesy of CHRYSLER LLC
1. Measure the resistance between the (R79) Front Left Impact Sensor Signal and (R81) Sensor Ground circuits at the Front Left Impact Sensor connector.
  Is the resistance below 100K ohms?
  
  Yes
  - Repair the (R79, R81) Front Left Impact Sensor circuits shorted together.
  - Perform the AIRBAG SYSTEM VERIFICATION TEST. See DTC-Based Diagnostics/CONTROLLER, Occupant Restraint (ORC) - Standard Procedure .
  No
  - Go to step 5
CHECK THE (R81) FRONT LEFT IMPACT SENSOR GROUND CIRCUIT FOR AN OPEN OR HIGH RESISTANCE

Fig 4: Checking Front Left Impact Sensor Ground Circuit For An Open Or High Resistance
Courtesy of CHRYSLER LLC
1. Connect the 8443A Load Tool ORC Adaptor to the Occupant Restraint Control Module connector.
2. Measure the resistance of the (R81) Front Left Impact Sensor Ground circuit between the Front Left Impact Sensor connector and the 8443A Load Tool ORC Adaptor.
  Is the resistance below 1 ohm?
  
  Yes
  - Go to step 6
  No
  - Repair the (R81) Front Left Impact Sensor 1 Ground circuit for an open or high resistance.
  - Perform the AIRBAG SYSTEM VERIFICATION TEST. See DTC-Based Diagnostics/CONTROLLER, Occupant Restraint (ORC) - Standard Procedure .
CHECK THE (R79) FRONT LEFT IMPACT SENSOR SIGNAL CIRCUIT FOR AN OPEN OR HIGH RESISTANCE

Fig 5: Checking Front Left Impact Sensor Signal Circuit For An Open Or High Resistance
Courtesy of CHRYSLER LLC
1. Measure the resistance of the (R79) Front Left Impact Sensor Signal circuit between the Front Left Impact Sensor connector and the 8443A Load Tool ORC Adaptor.
  Is the resistance below 1 ohm?
  
  Yes
  - Go to step 7
  No
  - Repair the (R79) Front Left Impact Sensor Signal circuit for an open or high resistance.
  - Perform the AIRBAG SYSTEM VERIFICATION TEST. See DTC-Based Diagnostics/CONTROLLER, Occupant Restraint (ORC) - Standard Procedure .
CHECK OPERATION OF THE FRONT LEFT IMPACT SENSOR
1. Replace the Front Left Impact Sensor.
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. 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 Front Left Impact Sensor DTC return?
  
  Yes
  - Go to step 8
  No
  - Repair is complete.
  - Perform the AIRBAG SYSTEM VERIFICATION TEST. See DTC-Based Diagnostics/CONTROLLER, Occupant Restraint (ORC) - Standard Procedure .
REPLACE THE OCCUPANT RESTRAINT CONTROLLER
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 airbag control module is dropped at any time, it must be replaced. Failure to take the proper precautions could result in accidental airbag deployment and serious or fatal injury.

If there are no possible causes remaining, view repair.

Repair
- Replace the Occupant Restraint Controller in accordance with Service Information.
- Perform the ORC VERIFICATION TEST. See DTC-Based Diagnostics/CONTROLLER, Occupant Restraint (ORC) - Standard Procedure .
TEST FOR AN INTERMITTENT CONDITION
1. With the scan tool, record and erase all DTCs from all Airbag modules.
2. If any ACTIVE codes are present they must be resolved before diagnosing any stored codes.
  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.
3. Using the SYSTEM WIRING DIAGRAMS as a guide, inspect the wiring and connectors.
4. Look for chafed, pierced, pinched, or partially broken wires and broken, bent, pushed out, spread, corroded, or contaminated terminals.
5. The following additional checks may assist you in identifying a possible intermittent problem.
6. Reconnect any disconnected components and harness connector.
  WARNING: Turn the ignition on, then reconnect the 12-volt battery. Wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.
7. With the scan tool monitor active codes as you work through the following steps.
  WARNING: Maintain a safe distance from all airbags while performing the following steps. Failure to follow these instructions may result in possible serious or fatal injury.
8. Wiggle the wiring harness and connectors of the related airbag circuit or component.
9. If only stored codes return continue the test until the problem area has been isolated.
10. In the previous steps you have attempted to recreate the conditions responsible for setting active DTC in question.
  Are any ACTIVE DTCs present?
  
  Yes
  - Select the appropriate diagnostic procedure from the DIAGNOSTIC CODE INDEX . See DTC-Based Diagnostics/CONTROLLER, Occupant Restraint (ORC) - Diagnosis and Testing .
  No
  - No problem found at this time. Erase all codes before returning vehicle to customer.