B0084
DTC B0083-B0088
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (Diagnostic System Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Strategy Based Diagnosis) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Diagnostic Procedure Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC B0083 01
- Front Impact Sensor 1 Short to Battery (Driver)
DTC B0083 02
- Front Impact Sensor 1 Short to Ground (Driver)
DTC B0083 39
- Front Impact Sensor 1 Internal Electronic Failure (Driver)
DTC B0083 3A
- Front Impact Sensor 1 Incorrect Component Installed (Driver)
DTC B0084 01
- Front Impact Sensor 2 Short to Battery (Passenger)
DTC B0084 02
- Front Impact Sensor 2 Short to Ground (Passenger)
DTC B0084 39
- Front Impact Sensor 2 Internal Electronic Failure (Passenger)
DTC B0084 3A
- Front Impact Sensor 2 Incorrect Component Installed (Passenger)
DTC B0085 01
- Left Front Side Impact Sensor Short to Battery
DTC B0085 02
- Left Front Side Impact Sensor Short to Ground
DTC B0085 39
- Left Front Side Impact Sensor Internal Malfunction
DTC B0085 3A
- Left Front Side Impact Sensor Incorrect Component Installed
DTC B0086 01
- Right Front Side Impact Sensor Short to Battery
DTC B0086 02
- Right Front Side Impact Sensor Short to Ground
DTC B0086 39
- Right Front Side Impact Sensor Internal Malfunction
DTC B0086 3A
- Right Front Side Impact Sensor Incorrect Component Installed
DTC B0087 01
- Left Rear Side Impact Sensor Short to Battery
DTC B0087 02
- Left Rear Side Impact Sensor Short to Ground
DTC B0087 39
- Left Rear Side Impact Sensor Internal Malfunction
DTC B0087 3A
- Left Rear Side Impact Sensor Incorrect Component Installed
DTC B0088 01
- Right Rear Side Impact Sensor Short to Battery
DTC B0088 02
- Right Rear Side Impact Sensor Short to Ground
DTC B0088 39
- Right Rear Side Impact Sensor Internal Malfunction
DTC B0088 3A
- Right Rear Side Impact Sensor Incorrect Component Installed
Diagnostic Fault Information
Circuit/System Description
The impact sensors are equipped on vehicles to supplement the Supplemental Inflatable Restraint (SIR) System performance. The impact sensors are electronic and are not part of the deployment loops, but instead provide inputs to the sensing and diagnostic module (SDM). The impact sensors can assist in determining the severity of some frontal and side collisions. The SDM uses the input from the impact sensors to assist in determining the severity of a collision further supporting air bag deployment. If the SDM determines a deployment is warranted, the SDM will cause current to flow through the deployment loops deploying the frontal air bags.
Conditions for Running the DTC
Ignition voltage is between 9-16 V.
Conditions for Setting the DTC
Any of the following conditions exist for 10 seconds:
B0083 01, B0084 01, B0085 01, B0086 01, B0087 01, B0088 01
The sensor has been shorted to voltage.
B0083 02, B0084 02, B0085 02, B0086 02, B0087 02, B0088 02
* The sensor has been shorted to ground.
* The sensor current is greater than 23 mA for greater than 5 milliseconds.
B0083 39, B0084 39, B0085 39, B0086 39, B0087 39, B0088 39
* The SDM has received a Not OK message from the sensor.
* The SDM has not received a message.
B0083 3A, B0084 3A, B0085 3A, B0086 3A, B0087 3A, B0088 3A
* The SDM has received identification message from the sensor, which does not match the identification stored in the SDM memory.
* The SDM has reset the sensor twice without detecting the correct identification message.
Action Taken When the DTC Sets
The SDM requests the instrument panel cluster to illuminate the AIR BAG indicator.
Conditions for Clearing the DTC
* The condition for setting the DTC no longer exists.
* A history DTC will clear once 100 malfunction-free ignition cycles have occurred.
* An ignition cycle is required for the DTC to go from current to history.
Reference Information
Schematic Reference
SIR Schematics ([1][2]Air Bag Systems)
Connector End View Reference
Component Connector End Views (Connector Views)
Description and Operation
SIR System Description and Operation (SIR System Description and Operation)
Electrical Information Reference
* Circuit Testing (Circuit Testing)
* Testing for Intermittent Conditions and Poor Connections (Testing For Intermittent Conditions and Poor Connections)
* Connector Repairs (Connector Repairs)
* Wiring Repairs (Wiring Repairs)
Scan Tool Reference
Control Module References (Programming and Relearning) for scan tool information
Circuit/System Verification
Note: Refer to SIR Service Precautions (Technician Safety Information).
Inspect all terminals for damage or corrosion when disconnecting connectors. Damage or corrosion in the following requires repair or replacement of the affected component/connector.
* Air bag module
* Steering wheel inflatable restraint module coil
* SDM module
* Air bag wiring harness connector
* SDM wiring harness connector
Note: The connector and connector position assurance (CPA) may seat independent of each other. Both the connector and CPA should seat with an audible and/or tactile click. The CPA isolates the shorting-bars within the connector allowing the deployment circuit to operate properly. Replace any CPA that is damaged or missing.
If the condition is intermittent or cannot be duplicated, disconnect the connectors and add Nyogel lubricant 760G. This procedure will correct the high resistance condition due to terminal fretting corrosion.
1. Verify that DTC B0083-B0088 symptom byte 39 or 71 is not set as current.
• If symptom byte 39 or 71 is set as current, replace the appropriate B59 or B63 impact sensor.
2. Verify that the SDM calibrations match the VIN data, software part number, and calibration part number.
• If not the correct data or part number, program the SDM.
3. Verify the correct impact sensors have the correct part numbers, matching the label part numbers with the parts book.
• If the part numbers do not match, replace the incorrect B59 or B63 impact sensor
4. Verify that DTC B0083-B0088 symptom byte 01, 02 or 04 is not set as current.
• If symptom byte 01, 02 or 04 is set as current, refer to Circuit/System Testing.
Circuit/System Testing
1. Ignition OFF, disconnect the scan tool and disconnect the harness connector at the appropriate B59 or B63 impact sensor.
2. Wait for 120 seconds and then test for less than 10 ohm between the low reference circuit terminal 2 and ground.
• If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K36 SDM.
3. Test for greater than 50k ohm between the signal circuit terminal 1 and ground.
• If less than the specified value, test the signal circuit for a short to ground. If the circuit tests normal, replace the K36 SDM.
4. Disconnect the harness connector at the SDM.
5. Test for less than 1 ohm between the impact sensor signal circuit terminal 1 and the SDM terminal listed below.
* Left front side impact sensor terminal 19 X2
* Left front end impact sensor terminal 23 X2
* Right front side impact sensor terminal 22 X2
* Right front end impact sensor terminal 26 X2
* Left rear side impact sensor terminal 27 X2
* Right rear side impact sensor terminal 30 X2
• If greater than the specified range, test the circuit for an open/high resistance.
6. If all circuits test normal, replace the B59 or B63 sensor. The DTC should not be set as current.
• If the DTC resets as current, replace the K36 SDM.
Repair Instructions
Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.
* Front End Inflatable Restraint Discriminating Sensor Replacement (Front End Inflatable Restraint Discriminating Sensor Replacement)
* Inflatable Restraint Side Impact Sensor Replacement (Inflatable Restraint Side Impact Sensor Replacement)
* Control Module References (Programming and Relearning) for SDM replacement, setup, and programming