B0083
DTC B0083 or B0084
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 End Sensor 1 Short to Battery (Left)
DTC B0083 02
- Front End Sensor 1 Short to Ground (Left)
DTC B0083 04
- Front End Sensor 1 Open Circuit (Left)
DTC B0083 39
- Front End Sensor 1 Internal Electronic Failure (Left)
DTC B0083 3A
- Front End Sensor 1 Invalid Serial Data Received (Left)
DTC B0083 71
- Front End Sensor 1 Invalid Serial Data Received (Left)
DTC B0083 0F
- Front End Sensor 1 Incorrect Component Installed (Left)
DTC B0084 01
- Front End Sensor 2 Short to Battery (Right)
DTC B0084 02
- Front End Sensor 2 Short to Ground (Right)
DTC B0084 04
- Front End Sensor 2 Open Circuit (Right)
DTC B0084 39
- Front End Sensor 2 Internal Electronic Failure (Right)
DTC B0084 3A
- Front End Sensor 2 Invalid Serial Data Received (Right)
DTC B0084 71
- Front End Sensor 2 Invalid Serial Data Received (Right)
DTC B0084 0F
- Front End Sensor 2 Incorrect Component Installed (Right)
Diagnostic Fault Information
Circuit/System Description
The inflatable restraint front end sensor also known as the electronic frontal sensor (EFS) utilizes a unidirectional 2-wire circuit. The front end 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 the front end sensor. When the ignition is turned ON and input power from the SDM is first detected, the front end 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 front end sensor continually communicates status messages to the SDM, which determines if a fault is present in the front end sensor circuit. When a fault is detected, the SDM may reset the front end sensor up to 2 times by removing and reapplying power to it. If the fault is still present, the SDM will set a diagnostic trouble code (DTC).
Conditions for Running the DTC
Ignition voltage is between 9-16 V.
Conditions for Setting the DTC
B0083 01 or B0084 01
* The front end sensor has been shorted to voltage.
* The SDM has not received a message from the front end sensor.
B0083 02 or B0084 02
* The front end sensor has been shorted to ground.
* The front end sensor current has been above 23 mA for greater than 5 milliseconds.
B0083 04 or B0084 04
The front end sensor circuit is open.
B0083 39 or B0084 39
* The SDM has received a NOK message from the front end sensor.
* The SDM has not received a message.
B0083 3A or B0084 3A
* The ID message received from the front end sensor does not match the ID stored in the SDM.
* The SDM has reset the front end sensor twice without detecting the correct ID message.
B0083 71 or B0084 71
The SDM has received invalid serial data from the front end sensor.
B0083 0F or B0084 0F
The SDM has received erratic messages from the front end 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 [1][2]Air Bag Systems
Connector End View Reference
Component Connector End Views Connector End Views By Name
Description and Operation
SIR System Description and Operation Description and Operation
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 Programming and Relearning for scan tool information
Circuit/System Testing
Note: Refer to SIR Service Precautions Technician Safety Information.
When removing the connectors, inspect for damage or corrosion. Damage or corrosion to the following requires repair or replacement of the affected component/connector:
Note:
* Front end sensor
* SDM
* Front end sensor wiring harness connector
* SDM wiring harness connector
1. Ignition OFF, disconnect the harness connector at the SDM and the appropriate front end sensor.
2. Ignition ON, test for less than 1 V between the front end sensor signal circuit terminal B and ground.
• If greater than the specified range, test the circuit for a short to voltage.
3. Ignition ON, test for less than 1 V between the front end sensor low reference circuit terminal A and ground.
• If greater than the specified range, test the circuit for a short to voltage.
4. Test for infinite resistance between the front end sensor signal circuit terminal B and ground.
• If less than the specified value, test the circuit for a short to ground.
5. Test for less than 1 ohm between the front end sensor signal circuit terminals listed below:
* Right front end sensor terminal B and SDM harness connector terminal 37.
* Left front end sensor terminal B and SDM harness connector terminal 38.
• If greater than the specified range, test the signal circuit for an open/high resistance.
6. Test for less than 1 ohm between the front end low reference circuit terminals listed below:
* Right front end sensor terminal A and SDM harness connector terminal 36.
* Left front end sensor terminal A and SDM harness connector terminal 39
• If greater than the specified range, test the low reference circuit for an open/high resistance.
7. If all circuits test normal, replace the appropriate front end sensor.
8. Reconnect all SIR components. Ignition ON, verify the DTC does not set as current.
• If the DTC resets as current, 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
* SIR/SRS Wiring Repairs SIR/SRS Wiring Repairs
* Control Module References Programming and Relearning for SDM replacement, setup, and programming