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U11B0






U11B0 - Lost Communication W/Right Side Satellite Impact Sensor 4






For a complete wiring diagram, refer to.

Theory of Operation







The impact sensors perform their own self test using power supplied by the Occupant Restraint Controller (ORC) then communicate this status back to the ORC with periodic updates. The repair of this fault condition involves verifying the integrity of the wiring between the ORC and the sensor. Refer to the enclosed graphic as a reference of specific Side Impact Satellite Acceleration, Side Impact Satellite Pressure, and Up-Front Satellite Acceleration sensor locations on the vehicle. It is important to review this graphic thoroughly to understand the specific area of diagnosis you are looking to complete.

The Up-Front Right and Up-Front Left Satellite Acceleration Sensors are located behind the Front End Module carrier in the engine area. The number 1 side sensors are located in the 1st row door area with the number 1 side sensor being on the passenger side (Right Side Satellite Pressure Sensor 1) and the number 1 side sensor also being on the driver side (Left Side Satellite Pressure Sensor 1). The number 4 side sensors are located in the "B" pillar area just past the 1st row doors (these side sensors will be new side sensors to be added for the 2011 model year). The number 4 side sensor is located on the passenger side (Right Side Satellite Acceleration Sensor 4) and the number 4 side sensor is also located on the driver side (Left Side Satellite Acceleration Sensor 4). The number 2 side sensors are located in the "C" pillar area just past the 2nd row doors. The number 2 side sensor is located on the passenger side (Right Side Satellite Acceleration Sensor 2) and the number 2 side sensor is also located on the driver side (Left Side Satellite Acceleration Sensor 2). The number 3 side sensors are located in the 3rd row area just above the rear axle. The number 3 side sensor is located on the passenger side (Right Side Satellite Acceleration Sensor 3) and the number 3 side sensor is also located on the driver side (Left Side Satellite Acceleration Sensor 3).

• When Monitored: The Occupant Restraint Controller (ORC) continuously communicates with the Right Side Impact Sensor 4 over the sensor signal circuit. The sensor communication and on board diagnostics are powered by the ORC signal.

• Set Condition: This code will set, if the ORC and the Right Side Impact Sensor 4 do not establish and maintain valid data communications. The DTC will become Active after the fault has set for 2 to 3 seconds. The DTC will go to Stored after the ORC to Right Side Impact Sensor 4 communication has recovered for 2.5 seconds.






Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.

Test Step 1 - VERIFY THAT DTC U11B0-LOST COMMUNICATION W/RIGHT SIDE SATELLITE ACCELERATION SENSOR 4 IS ACTIVE

• Make sure the battery is fully charged.

• Turn the ignition on.

• With the scan tool, read ORC DTCs.

Does the scan tool display active: U11B0-LOST COMMUNICATION W/RIGHT SIDE SATELLITE ACCELERATION SENSOR 4?

Yes

• Go to Test Step 2 => [ Test Step 2 - CHECK THE (R141), (R161) RIGHT SIDE IMPACT SENSOR 4
SIGNAL AND GROUND CIRCUITS FOR A SHORT TO VOLTAGE ]

No

• Perform the Restraints System Intermittent Test. Refer to => Non - DTC Based Diagnostics. ORC Restraints System Intermittent Test

Test Step 2 - CHECK THE (R141), (R161) RIGHT SIDE IMPACT SENSOR 4 SIGNAL AND GROUND CIRCUITS FOR A SHORT TO VOLTAGE








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.

• Disconnect the Right Side Impact Sensor 4 harness connector.

• Disconnect the ORC harness connector.


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.

• Measure the voltage of the (R141) Right Side Impact Sensor 4 Signal circuit and (R161) Sensor Ground circuit at the appropriate terminal of the Right Side Impact Sensor harness connector and ground.

Is there any voltage present?

Yes

• Repair the (R140), (R160) Right Side Impact Sensor 4 circuits for a short to voltage.

• Perform the Restraints System Verification Test. Refer to => Non - DTC Based Diagnostics. ORC Restraints System Verification Test

No

• Go to Test Step 3 => [ Test Step 3 - CHECK THE (R141) RIGHT SIDE IMPACT SENSOR 4 SIGNAL
CIRCUIT FOR A SHORT TO GROUND ]

Test Step 3 - CHECK THE (R141) RIGHT SIDE IMPACT SENSOR 4 SIGNAL CIRCUIT FOR A SHORT TO GROUND








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.

• Measure the resistance of the (R141) Right Side Impact Sensor 4 Signal circuit between the appropriate terminal of the Right Side Impact Sensor 4 harness connector and ground.

Is the resistance below 20 Ohms?

Yes

• Repair the (R141) Right Side Impact Sensor 4 Signal circuit for a short to ground.

• Perform the Restraints System Verification Test. Refer to => Non - DTC Based Diagnostics. ORC Restraints System Verification Test

No

• Go to Test Step 4 => [ Test Step 4 - CHECK THE (R141), (R161) RIGHT SIDE IMPACT SENSOR 4
CIRCUITS FOR A SHORT TOGETHER ]

Test Step 4 - CHECK THE (R141), (R161) RIGHT SIDE IMPACT SENSOR 4 CIRCUITS FOR A SHORT TOGETHER







• Measure the resistance between the (R141) Right Side Impact Sensor 4 Signal circuit and the (R161) Sensor Ground circuits at the Right Side Impact Sensor 4 harness connector.

Is the resistance below 20 Ohms?

Yes

• Repair the (R141), (R161) Right Side Impact Sensor 4 circuits shorted together.

• Perform the Restraints System Verification Test. Refer to => Non - DTC Based Diagnostics. ORC Restraints System Verification Test

No

• Go to Test Step 5 => [ Test Step 5 - CHECK THE (R161) RIGHT SIDE IMPACT SENSOR 4 GROUND
CIRCUIT FOR AN OPEN OR HIGH RESISTANCE ]

Test Step 5 - CHECK THE (R161) RIGHT SIDE IMPACT SENSOR 4 GROUND CIRCUIT FOR AN OPEN OR HIGH RESISTANCE







• Connect the SRS Load Tool Adapter 8443-28 to the Occupant Control Module harness connector.

• Measure the resistance of the (R161) Right Side Impact Sensor 4 Ground circuit between the Right Side Impact Sensor 4 harness connector and the appropriate terminal of the SRS Load Tool Adapter 8443-28.

Is the resistance below 1 Ohm?

Yes

• Go to Test Step 6 => [ Test Step 6 - CHECK THE (R141) RIGHT SIDE IMPACT SENSOR 4 SIGNAL
CIRCUIT FOR AN OPEN OR HIGH RESISTANCE ]

No

• Repair the (R161) Right Side Impact Sensor 4 Ground circuit for an open or high resistance.

• Perform the Restraints System Verification Test. Refer to => Non - DTC Based Diagnostics. ORC Restraints System Verification Test

Test Step 6 - CHECK THE (R141) RIGHT SIDE IMPACT SENSOR 4 SIGNAL CIRCUIT FOR AN OPEN OR HIGH RESISTANCE







• Measure the resistance of the (R141) Right Side Impact Sensor 4 Signal circuit between the a Right Side Impact Sensor 4 harness connector and the appropriate terminal of the SRS Load Tool Adapter 8443-28.

Is the resistance below 1 Ohm?

Yes

• Go to Test Step 7 => [ Test Step 7 - CHECK OPERATION OF THE RIGHT SIDE IMPACT SENSOR 4 ]

No

• Repair the (R141) Right Side Impact Sensor 4 Signal circuit for an open or high resistance.

• Perform the Restraints System Verification Test. Refer to => Non - DTC Based Diagnostics. ORC Restraints System Verification Test

Test Step 7 - CHECK OPERATION OF THE RIGHT SIDE IMPACT SENSOR 4

• Replace the Right Side Impact Sensor.

• Reconnect the vehicle body harness to the impact sensor.

• Remove any special tools or jumper wires and reconnect all previously disconnected components - except the Battery.


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.

• Connect the scan tool to the Data Link Connector - use the most current software available.

• Use the scan tool and erase the stored codes in all airbag system modules.

• Turn the Ignition Off, and wait five seconds before turning the Ignition On.

• Wait one minute, and read active codes and if there are none present read the stored codes.

Did the active: U11B0-LOST COMMUNICATION W/RIGHT SIDE SATELLITE IMPACT SENSOR 4 DTC return?

Yes

• Replace the Occupant Restrain Controller (ORC).

• Perform the Restraints System Verification Test. Refer to => Non - DTC Based Diagnostics. ORC Restraints System Verification Test


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.


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.

No

• Repair is complete.

• Perform the Restraints System Verification Test. Refer to => Non - DTC Based Diagnostics. ORC Restraints System Verification Test

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