DTC B0083-B0088
Diagnostic Instructions
DTC Descriptors
DTC B0083 01: Centre Front Impact Sensor Short to Battery
DTC B0083 02: Centre Front Impact Sensor Short to Ground
DTC B0083 04: Centre Front Impact Sensor Open
DTC B0083 39: Centre Front Impact Sensor Internal Electronic Failure
DTC B0083A 3A: Centre Front Impact Sensor Incorrect Component Installed
DTC B0083 71: Centre Front Impact Sensor Invalid Serial Data Received
DTC B0085 01: Left Front Side Impact Sensor Short to Battery
DTC B0085 02: Left Front Side Impact Sensor Short to Ground
DTC B0085 04: Left Front Side Impact Sensor Open
DTC B0085 39: Left Front Side Impact Sensor Internal Malfunction
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 01: Right Front Side Impact Sensor Short to Battery
DTC B0086 02: Right Front Side Impact Sensor Short to Ground
DTC B0086 04: Right Front Side Impact Sensor Open
DTC B0086 39: Right Front Side Impact Sensor Internal Malfunction
DTC B0086 3A: Right Front Side Impact Sensor Incorrect Component Installed
DTC B0086 71: Right Front Side Impact Sensor Invalid Serial Data Received
Diagnostic Fault Information
Circuit
| Short to Ground
| Open/High Resistance
| Short to Voltage
| Signal Performance
|
Centre Front Impact Sensor High Signal
| B0083 02
| B0083 04
| B0083 01
| B0083 3A
|
Centre Front Impact Sensor Low Reference
| B0083 02
| B0083 04
| B0083 01
| B0083 3A
|
Left Front Side Impact Sensor High Signal
| B0085 02
| B0085 04
| B0085 01
| B0085 39
|
Left Front Side Impact Low Reference
| B0085 02
| B0085 04
| B0085 01
| B0085 39
|
Right Front Side Impact Sensor High Signal
| B0086 02
| B0086 04
| B0086 01
| B0086 39
|
Right Front Side Impact Sensor Low Reference
| B0086 02
| B0086 04
| B0086 01
| B0086 39
|
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 inflatable restraint 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, B0085 01, B0086 01
The sensor has been shorted to voltage.
B0083 02, B0085 02, B0086 02
• | The sensor has been shorted to ground. |
• | The sensor current is greater than 23 mA for greater than 5 milliseconds. |
B0083 04, B0085 04, B0086 04
• | The sensor circuit is open. |
• | The SDM has not received a message from the sensor for greater than 375 milliseconds. |
B0083 39, B0085 39, B0086 39
• | The SDM has received a Not OK message from the sensor. |
• | The SDM has not received a message. |
B0083 3A, B0085 3A, B0086 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. |
B0083 71, B0085 71, B0086 71
The SDM has received invalid serial data from the sensor.
Action Taken When the DTC Sets
The SDM requests the instrument panel cluster to illuminate the SIR system 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
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
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.
• | Impact sensor wiring harness connector |
• | SDM wiring harness connector |
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.
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.
- Verify that DTC B0083-B0088 symptom byte 39 or 71 is not set as current.
⇒ | If DTC B0083-B0088 symptom byte 39 or 71 is set as current
|
⇒ | Replace the appropriate B59 or B63 impact sensor. |
⇓ | If DTC B0083-B0088 symptom byte 39 or 71 is not set as current
|
- Verify that the SDM calibrations match the VIN data, software part number, and calibration part number.
⇒ | If the SDM calibrations do not match the VIN data
|
⇓ | If the SDM calibrations match the VIN data
|
- Verify the correct impact sensors have the correct part numbers, matching the label part numbers with the parts book.
⇒ | If the SDM part numbers do not match
|
⇒ | Replace the incorrect B59 or B63 impact sensor |
⇓ | If the SDM part numbers do match
|
- Verify that DTC B0083-B0088 symptom byte 01, 02 or 04 is not set as current.
⇒ | If DTC B0083-B0088 symptom byte 01, 02 or 04 is set as current
|
⇒ | Refer to Circuit/System Testing. |
⇓ | If DTC B0083-B0088 symptom byte 01, 02 or 04 is not set as current
|
- All OK.
Circuit/System Testing
- Ignition OFF.
- Disconnect the harness connector at the appropriate B59 or B63 impact sensor, wait 120 seconds.
- Test for less than 10 Ω between the low reference circuit terminal 2 and ground.
3.1. | Ignition OFF, disconnect the harness connector at the K36 SDM. |
3.2. | 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. |
- Test for greater than 50k Ω between the signal circuit terminal 1 and ground.
4.1. | Disconnect the harness connector at the K36 SDM. |
4.2. | 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. |
- Disconnect the harness connector at the SDM.
- Test for less than 2 Ω between the signal circuit end to end from the impact sensor terminal 1 and the SDM terminal listed below:
• | Left front side impact sensor terminal 19 X2 |
• | Centre front impact sensor terminal 23 X2 |
• | Right front side impact sensor terminal 22 X2 |
- Repair the open/high resistance in the circuit.
- Replace the B59 or B63 impact sensor.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
© Copyright Chevrolet. All rights reserved |
© Copyright Chevrolet. All rights reserved |