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B0083





DTC B0083 - B0088

Diagnostic Instructions

- Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure Initial Inspection and Diagnostic Overview.
- Review Strategy Based Diagnosis for an overview of the diagnostic approach Initial Inspection and Diagnostic Overview.
- Diagnostic Procedure Instructions provides an overview of each diagnostic category Initial Inspection and Diagnostic Overview.

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 B0083 71: Left Front Impact Sensor Invalid Serial Data Received
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 B0084 71: Right Front Impact Sensor Invalid Serial Data Received
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 B0085 71: Left Front Side Impact Sensor Invalid Serial Data Received
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 B0086 71: Right Front Side Impact Sensor Invalid Serial Data Received
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 B0087 71: Left Rear Side Impact Sensor Invalid Serial Data Received
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
DTC B0088 71: Right Rear Side Impact Sensor Invalid Serial Data Received

Diagnostic Fault Information










Circuit/System Description

The impact sensors utilize a unidirectional 2-wire circuit. The impact sensors modulate 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 the impact sensor. When the ignition is turned ON and input power from the SDM is first detected, the 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 impact sensor continually communicates status messages to the SDM, which determines if a fault is present in the impact sensor circuit. When a fault is detected, the SDM may reset the impact 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 volts.

Conditions for Setting the DTC

Any of the following conditions exist for 2.5 seconds:

B0083 00, B0084 00, B0085 00, B0086 00, B0087 00, B0088 00

- The impact sensor has been shorted to voltage, open, or shorted to ground.
- The impact sensor current has been above 23 mA for longer than 5 milliseconds.
- The SDM has not received a message from the impact sensor for more than 375 milliseconds.

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

The SDM has received erratic messages from the impact sensor.

B0083 39, B0084 39, B0085 39, B0086 39, B0087 39, B0088 39

- The SDM has received a Not Ok (NOK) message from the impact sensor.
- The SDM has not received a message.
- The SDM has received invalid serial data from the impact sensor.

B0083 3A, B0084 3A, B0085 3A, B0086 3A, B0087 3A, 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.

B0083 71, B0084 71, B0085 71, B0086 71, B0087 71, B0088 71

The SDM has received invalid serial data from the impact sensor.

Action Taken When the DTC Sets

- The SDM requests the instrument panel cluster (IPC) to illuminate the AIR BAG indicator.
- 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 Electrical Diagrams

Connector End View Reference

Component Connector End Views Connector Views

Description and Operation

SIR System Description and Operation Description and Operation

Electrical Information Reference

- Circuit Testing Component Tests and General Diagnostics
- Testing for Intermittent Conditions and Poor Connections Component Tests and General Diagnostics
- Connector Repairs Component Tests and General Diagnostics
- Wiring Repairs Component Tests and General Diagnostics

Scan Tool Reference

Control Module References for scan tool information Programming and Relearning.

Circuit/System Verification

Note: Refer to SIR Service Precautions 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 Technician Safety Information.

- Impact sensor
- SDM module
- Impact sensor 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 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: Refer to SIR Service Precautions . When removing connectors, inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected component/connector:

- Impact sensor
- SDM module
- Impact sensor wiring harness connector
- SDM wiring harness connector

1. Ignition OFF, disconnect the harness connector at the appropriate impact sensor.
2. Disconnect the harness connector at the SDM.
3. Ignition ON, test for less than 1 volt between the following signal circuit and ground.
- Right front impact sensor terminal 1
- Left front impact sensor terminal 1
- Right front side impact sensor terminal B
- Left front side impact sensor terminal B
- Right rear side impact sensor terminal B
- Left rear side impact sensor terminal B
-> If greater than the specified range, test the circuit for a short to voltage.
4. Ignition ON, test for less than 1 volt between the low reference circuit and ground.
- Right front impact sensor terminal 2
- Left front impact sensor terminal 2
- Right front side impact sensor terminal A
- Left front side impact sensor terminal A
- Right rear side impact sensor terminal A
- Left rear side impact sensor terminal A
-> If greater than the specified range, test the circuit for a short to voltage.
5. Test for infinite resistance between the signal circuit and ground.
- Right front impact sensor terminal 1
- Left front impact sensor terminal 1
- Right front side impact sensor terminal B
- Left front side impact sensor terminal B
- Right rear side impact sensor terminal B
- Left rear side impact sensor terminal B
-> If less than the specified value, test the circuit for a short to ground.
6. Test for less than 1 ohm between the following signal circuit terminals.
- Right front impact sensor terminal 1 and SDM terminal 26 X2.
- Left front impact sensor terminal 1 and SDM terminal 23 X2.
- Right front side impact sensor terminal B and the SDM terminal 22 X2.
- Left front side impact sensor terminal B and the SDM terminal 19 X2.
- Right rear side impact sensor terminal B and the SDM terminal 30 X2.
- Left rear side impact sensor terminal B and the SDM terminal 27 X2.
-> If greater than the specified range, test the circuit for an open/high resistance.
7. Test for less then 1 ohm between the following front end sensor low reference circuit terminals.
- Right front impact sensor terminal 2 and SDM terminal 25 X2.
- Left front impact sensor terminal 2 and SDM terminal 24 X2.
- Right front side impact sensor terminal A and the SDM terminal 21 X2.
- Left front side impact sensor terminal A and the SDM terminal 20 X2.
- Right rear side impact sensor terminal A and the SDM terminal 29 X2.
- Left rear side impact sensor terminal A and the SDM terminal 28 X2.
->If greater than the specified range, test the circuit for an open/high resistance.
8. If all circuits test normal, replace the appropriate impact sensor.
9. Reconnect all SIR components. Ignition ON, with a scan tool clear and check for DTCs.
-> If the DTC returns and is current, replace the SDM.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

- Inflatable Restraint Front End Sensor Replacement Service and Repair
- Inflatable Restraint Side Impact Sensor Replacement Service and Repair
- SIR/SRS Wiring Repairs Component Tests and General Diagnostics
- Control Module References for SDM replacement, setup, and programming Programming and Relearning
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