Volt

DTC B0083 or B0084

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 air bags.

Ignition voltage is between 9-16 V.

Any of the following conditions exist for 10 seconds:

B0083 02, B0084 02

B0083 05, B0084 05

B0083 39, B0084 39

B0083 3A, B0084 3A

B0083 71, B0084 71

The SDM has received invalid serial data from the sensor.

The SDM requests the instrument panel cluster to illuminate the AIR BAG indicator.

Schematic Reference

SIR Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

SIR System Description and Operation

Electrical Information Reference

Scan Tool Reference

Control Module References for scan tool information

Note: Refer to SIR Service Precautions .

Note: The connector and connector position assurance (CPA) may seat independently 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.

1. Vehicle in Service Mode. With a scan tool, verify that DTC B0083 or B0084 symptom byte 39 or 71 is not set as current.

⇒	If DTC B0083 or B0084 symptom byte 39 or 71 is set as current

Replace the appropriate B59 impact sensor.

⇓	If DTC B0083 or B0084 symptom byte 39 or 71 is not set as current

2. Verify that DTC B00083 or B0084 symptom byte 3A is not set as current.

⇒	If DTC B00083 or B0084 symptom byte 3A is set as current

Replace the incorrect B59 front impact sensor

⇓	If DTC B00083 or B0084 symptom byte 3A is not set as current

3. Verify that DTC B0083 or B0084 symptom byte 02 or 05 is not set as current.

⇒	If DTC B0083 or B0084 symptom byte 02 or 05 is set as current

Refer to Circuit/System Testing.

⇓	If DTC B0083 or B0084 symptom byte 02 or 05 is not set as current

4. All OK.

1. Vehicle OFF. Disconnect the harness connector at the appropriate B59 impact sensor. It may take up to 2 minutes for all vehicle systems to power down.
2. Test for less than 10 Ω between the low reference circuit terminal 2 and ground.

⇒	If 10 Ω or greater

2.1.	Vehicle OFF, disconnect the X2 harness connector at the K36 SDM.

2.2.	Test for less than 2 Ω in the low reference circuit end to end.

⇒	If 2 Ω or greater, repair the open/high resistance in the circuit.

⇒	If less than 2 Ω, replace the K36 SDM.

⇓	If less than 10 Ω

3. Vehicle in Service Mode.
4. Test for less than 11 V between the signal circuit terminal 1 and ground.

⇒	If 11 V or greater

4.1.	Vehicle OFF. Disconnect the X2 harness connector at the K36 SDM. Vehicle in Service Mode.

4.2.	Test for less than 1 V between the signal circuit terminal 1 and ground.

⇒	If 1 V or greater, repair the short to voltage on the circuit.

⇒	If less than 1 V, replace the K36 SDM.

⇓	If less than 1 V

5. Vehicle OFF. Test for greater than 50k Ω between the signal circuit terminal 1 and ground.

⇒	If 50k Ω or less

5.1.	Disconnect the X2 harness connector at the K36 SDM.

5.2.	Test for infinite resistance between the signal circuit and ground.

⇒	If less than infinite resistance, repair the short to ground on the circuit.

⇒	If infinite resistance, replace the K36 SDM.

⇓	If greater than 50k Ω

6. Disconnect the X2 harness connector at the SDM.
7. Test for less than 2 Ω between the signal circuit end to end from the B59 front impact sensor terminal 1 and the K36 SDM terminal listed below:

•	Right front impact sensor terminal 26 X2

•	Left front impact sensor terminal 23 X2

⇒	If 2 Ω or greater

8. Repair the short to voltage or an open/high resistance in the circuit.

⇓	If less than 2 Ω

9. Verify that the K36 SDM calibrations match the VIN data, software part number, and calibration part number.

⇒	If the K36 SDM calibrations do not match the VIN data

Program the K36 SDM, refer to Inflatable Restraint Sensing and Diagnostic Module Programming and Setup .

⇓	If the K36 SDM calibrations match the VIN data

10. Replace the B59 front impact sensor.
11. Operate the vehicle under the conditions for setting the DTC. The DTC should not be set.

⇒	If the DTC sets

Replace the K36 SDM

⇓	If the DTC does not set

12. All OK.

Perform the Diagnostic Repair Verification after completing the repair.