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B0083




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 00
- Left Front Impact Sensor

DTC B0083 0F
- Left Front Impact Sensor Erratic

DTC B0083 39
- Left Front Impact Sensor Internal Electronic Failure

DTC B0083 3A
- Left Front Impact Sensor Incorrect Component Installed

DTC B0084 00
- Right Front Impact Sensor

DTC B0084 0F
- Right Front Impact Sensor Erratic

DTC B0084 39
- Right Front Impact Sensor Internal Electronic Failure

DTC B0084 3A
- Right Front Impact Sensor Incorrect Component Installed

DTC B0085 00
- Left Front Side Impact Sensor

DTC B0085 0F
- Left Front Side Impact Sensor Erratic

DTC B0085 39
- Left Front Side Impact Sensor Internal Electronic Failure

DTC B0085 3A
- Left Front Side Impact Sensor Incorrect Component Installed

DTC B0086 00
- Right Front Side Impact Sensor

DTC B0086 0F
- Right Front Side Impact Sensor Erratic

DTC B0086 39
- Right Front Side Impact Sensor Internal Electronic Failure

DTC B0086 3A
- Right Front Side Impact Sensor Incorrect Component Installed

DTC B0087 00
- Left Rear Side Impact Sensor

DTC B0087 0F
- Left Rear Side Impact Sensor Erratic

DTC B0087 39
- Left Rear Side Impact Sensor Internal Electronic Failure

DTC B0087 3A
- Left Rear Side Impact Sensor Incorrect Component Installed

DTC B0088 00
- Right Rear Side Impact Sensor

DTC B0088 0F
- Right Rear Side Impact Sensor Erratic

DTC B0088 39
- Right Rear Side Impact Sensor Internal Electronic Failure

DTC B0088 3A
- Right Rear Side Impact Sensor Incorrect Component Installed

Diagnostic Fault Information






Circuit/System Description

The impact sensors utilizes a bidirectional 2-wire circuit. The impact sensor modulates current on the interface to send ID, state of health, and deployment commands to the inflatable restraint sensing and diagnostic module (SDM). The SDM serves as a power source and a ground for each of the impact sensors. When the ignition is turned ON and input power from the SDM is first detected, each impact sensor responds by performing internal diagnostics and sending an ID to the SDM. The SDM considers the ID to be valid if the response time is less than 5 seconds. The sensors continually communicates status messages to the SDM, which determines if a fault is present in the impact sensor or circuit. When a fault is detected, the SDM may reset the appropriate sensor up to 2 times by removing and reapplying power to it. If the fault is still present, the SDM will set a DTC.

Conditions for Running the DTC

Ignition voltage is between 9-16 V.

Conditions for Setting the DTC

All of the following conditions exist for 2.5 seconds:

B0083 00, B0084 00, B0085 00, B0086 00, B0087 00, or B0088 00
* The impact sensor signal circuit is shorted to voltage, shorted to ground, or has an open/high resistance.
* The impact sensor low reference circuit is open.
* The impact sensor current has been above 23 mA for longer than 5 milliseconds.

B0083 0F, B0084 0F, B0085 0F, B0086 0F, B0087 0F, or B0088 0F

The SDM has received erratic messages from the impact sensor.

B0083 39, B0084 39, B0085 39, B0086 39, B0087 39, or B0088 39
* The SDM has received a Not OK (NOK) message from the impact sensor.
* The SDM has not received a message.

B0083 3A, B0084 3A, B0085 3A, B0086 3A, B0087 3A, or B0088 3A
* The SDM has received an ID message from the impact sensor which does not match the ID stored in the SDM memory.
* The SDM has reset the impact sensor twice without detecting the correct ID message.

Action Taken When the DTC Sets

* The SDM commands the AIR BAG indicator ON.
* The SIR system is disabled and no deployments are allowed.

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.

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
Electrical Information Reference

* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs

Scan Tool Reference

Control Module References Control Module References 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.

* The impact sensor
* The SDM
* The impact sensor wiring harness connector
* The 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 front impact sensor or B63 side 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 front impact sensor or B63 side impact sensor

4. Verify that DTC B0083-B0088 symptom byte 01, 02, 04, 05, or 0C is not set as current.

• If symptom byte 01, 02, 04, 05, or 0C is set as current, refer to Circuit/System Testing.

Circuit/System Testing

Note: When removing connectors, inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected component/connector:

* The impact sensor
* The SDM
* The impact sensor wiring harness connector
* The SDM wiring harness connector

1. Ignition OFF, disconnect the harness connector at the appropriate impact sensor and the harness connector at the SDM.
2. Test for infinite resistance between the signal circuit terminal 1 (front impact sensor) or 2 (rear impact sensor) and ground.

• If less than the specified range, test the signal circuit for a short to ground.

3. Ignition ON, test for less than 1 V between the signal circuit terminal 1 (front impact sensor) or 2 (rear impact sensor) and ground.

• If greater than the specified range, test the circuit for a short to voltage.

4. Test for less then 1 ohm between the appropriate low reference circuit terminal at the impact sensor and the appropriate low reference circuit terminal at the SDM:

* Left Front Impact Sensor - Low Reference circuit terminal 2 at the sensor and the low reference circuit terminal 24 X2 at the SDM.
* Right Front Impact Sensor - Low Reference circuit terminal 2 at the sensor and the low reference circuit terminal 25 X2 at the SDM.
* Left Front Side Impact Sensor - Low Reference circuit terminal 1 at the sensor and the low reference circuit terminal 19 X2 at the SDM.
* Right Front Side Impact Sensor - Low Reference circuit terminal 1 at the sensor and the low reference circuit terminal 22 X2 at the SDM.
* Left Rear Side Impact Sensor - Low Reference circuit terminal 2 at the sensor and the low reference circuit terminal 28 X2 at the SDM.
* Right Rear Side Impact Sensor - Low Reference circuit terminal 2 at the sensor and the low reference circuit terminal 29 X2 at the SDM.

• If greater than the specified range, test the circuit for an open/high resistance.

5. Test for less then 1 ohm between the appropriate signal circuit terminal at the sensor and the appropriate signal circuit terminal at the SDM:

* Left Front Impact Sensor - Signal circuit terminal 1 at the sensor and the signal circuit terminal 23 X2 at the SDM.
* Right Front Impact Sensor - Signal circuit terminal 1 at the sensor and the signal circuit terminal 26 X2 at the SDM.
* Left Front Side Impact Sensor - Signal circuit terminal 2 at the sensor and the signal circuit terminal 20 X2 at the SDM.
* Right Front Side Impact Sensor - Signal circuit terminal 2 at the sensor and the signal circuit terminal 21 X2 at the SDM.
* Left Rear Side Impact Sensor - Signal circuit terminal 1 at the sensor and the signal circuit terminal 27 X2 at the SDM.
* Right Rear Side Impact Sensor - Signal circuit terminal 1 at the sensor and the signal circuit terminal 30 X2 at the SDM.

• If greater than the specified range, test the circuit for an open/high resistance.

6. If all circuits test normal, replace the impact sensor.
7. Clear DTCs and operate the vehicle within the condition for running the DTC. Verify DTC B0083, B0084, B0085, B0086, B0087, or B0088 does not set.

• If any of the DTCs set, replace the SDM.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.

* Inflatable Restraint Front End Sensor Replacement Inflatable Restraint Front End Sensor Replacement
* Inflatable Restraint Side Impact Sensor Replacement - Front Side Door Inflatable Restraint Side Impact Sensor Replacement - Front Side Door
* Inflatable Restraint Side Impact Sensor Replacement - Rear Side Door (Sedan and Wagon) Inflatable Restraint Side Impact Sensor Replacement - Rear Side Door (Sedan and Wagon)
* Control Module References Control Module References for SDM replacement, setup, and programming

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