Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
DTC Descriptors
DTC B0083 00: Front End Sensor 1 (Left)DTC B0083 0F: Front End Sensor 1 Erratic (Left)
DTC B0083 39: Front End Sensor 1 Internal Electronic Failure (Left)
DTC B0083 3A: Front End Sensor 1 Incorrect Component Installed (Left)
DTC B0084 00: Front End Sensor 2 (Right)
DTC B0084 0F: Front End Sensor 2 Erratic (Right)
DTC B0084 39: Front End Sensor 2 Internal Electronic Failure (Right)
DTC B0084 3A: Front End Sensor 2 Incorrect Component Installed (Right)
DTC B0085 00: LF Side Impact Sensor
DTC B0085 0F: LF Side Impact Sensor Erratic
DTC B0085 39: LF Side Impact Sensor Internal Electronic Failure
DTC B0085 3A: LF Side Impact Sensor Incorrect Component Installed
DTC B0086 00: RF Side Impact Sensor
DTC B0086 0F: RF Side Impact Sensor Erratic
DTC B0086 39: RF Side Impact Sensor Internal Electronic Failure
DTC B0086 3A: RF Side Impact Sensor Incorrect Component Installed
DTC B0087 00: LR Side Impact Sensor
DTC B0087 0F: LR Side Impact Sensor Erratic
DTC B0087 39: LR Side Impact Sensor Internal Electronic Failure
DTC B0087 3A: LR Side Impact Sensor Incorrect Component Installed
DTC B0088 00: RR Side Impact Sensor
DTC B0088 0F: RR Side Impact Sensor Erratic
DTC B0088 39: RR Side Impact Sensor Internal Electronic Failure
DTC B0088 3A: RR Side Impact Sensor Incorrect Component Installed
Diagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Left Front Sensor Signal | B0083 00 | B0083 00 | B0083 00 | B0083 0F |
Left Front Sensor Low Reference | -- | B0083 00 | -- | B0083 0F |
Right Front Sensor Signal | B0084 00 | B0084 00 | B0084 00 | B0084 0F |
Right Front Sensor Low Reference | -- | B0084 00 | -- | B0084 0F |
Left Front Side Impact Sensor Signal | B0085 00 | B0085 00 | B0085 00 | B0085 0F |
Left Front Side Impact Sensor Low Reference | -- | B0085 00 | -- | B0085 0F |
Right Front Side Impact Sensor Signal | B0086 00 | B0086 00 | B0086 00 | B0086 0F |
Right Front Side Impact Sensor Low Reference | -- | B0086 00 | -- | B0086 0F |
Left Rear Side Impact Sensor Signal | B0087 00 | B0087 00 | B0087 00 | B0087 0F |
Left Rear Side Impact Sensor Low Reference | -- | B0087 00 | -- | B0087 0F |
Right Rear Side Impact Sensor Signal | B0088 00 | B0088 00 | B0088 00 | B0088 0F |
Right Rear Side Impact Sensor Low Reference | -- | B0088 00 | -- | B0088 0F |
Circuit/System Description
The inflatable restraint discriminating sensors utilizes a bidirectional 2-wire circuit. The 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 sensors. When the ignition is turned ON and input power from the SDM is first detected, each 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 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 volts.
Conditions for Setting the DTC
All of the following conditions exist for 2.5 seconds:
B0083 00, B0084 00, B0085 00, or B0086 00
| • | The sensor signal circuit is shorted to voltage, shorted to ground, or has an open/high resistance. |
| • | The sensor low reference circuit is open. |
| • | The front end sensor current has been above 23mA for longer than 5 milliseconds. |
B0083 0F, B0084 0F, B0085 0F, or B0086 0F
The SDM has received erratic messages from the sensor.
B0083 39, B0084 39, B0085 39, or B0086 39
| • | The SDM has received a Not OK (NOK) message from the sensor. |
| • | The SDM has not received a message. |
B0083 3A, B0084 3A, B0085 3A, or B0086 3A
| • | The SDM has received an ID message from the sensor which does not match the ID stored in the SDM memory. |
| • | The SDM has reset the 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
Connector End View Reference
Description and Operation
SIR System Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Testing
Important: 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
- Ignition OFF, disconnect the harness connector at the appropriate impact sensor and the harness connector at the SDM.
- Test for infinite resistance between the signal circuit terminal B and ground.
- Ignition ON, test for less than 1 volt between the signal circuit terminal B and ground.
- Test for less then 1 ohm between the appropriate low reference circuit terminal at the sensor and the appropriate low reference circuit terminal at the SDM:
- Test for less then 1 ohm between the appropriate signal circuit terminal at the sensor and the appropriate signal circuit terminal at the SDM:
- If all circuits test normal, replace the impact sensor.
- 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 less than the specified range, test the signal circuit for a short to ground. |
| ⇒ | If greater than the specified range, test the circuit for a short to voltage. |
| • | Left Front Sensor - Low Reference circuit terminal A at the sensor and the low reference circuit terminal 38 at the SDM. |
| • | Right Front End Sensor - Low Reference circuit terminal A at the sensor and the low reference circuit terminal 39 at the SDM. |
| • | Left Front Side Sensor - Low Reference circuit terminal A at the sensor and the low reference circuit terminal 40 at the SDM. |
| • | Right Front Side Sensor - Low Reference circuit terminal A at the sensor and the low reference circuit terminal 41 at the SDM. |
| • | Left Rear Side Sensor - Low Reference circuit terminal A at the sensor and the low reference circuit terminal 46 at the SDM. |
| • | Right Rear Side Sensor - Low Reference circuit terminal A at the sensor and the low reference circuit terminal 47 at the SDM. |
| ⇒ | If greater than the specified range, test the circuit for an open/high resistance. |
| • | Left Front Sensor - Signal circuit terminal B at the sensor and the signal circuit terminal 36 at the SDM. |
| • | Right Front End Sensor - Signal circuit terminal B at the sensor and the signal circuit terminal 37 at the SDM. |
| • | Left Side Sensor - Signal circuit terminal B at the sensor and the signal circuit terminal 42 at the SDM. |
| • | Right Side Sensor - Signal circuit terminal B at the sensor and the signal circuit terminal 43 at the SDM. |
| • | Left Rear Side Sensor - Signal circuit terminal B at the sensor and the signal circuit terminal 44 at the SDM. |
| • | Right Rear Side Sensor - Signal circuit terminal B at the sensor and the signal circuit terminal 45 at the SDM. |
| ⇒ | If greater than the specified range, test the circuit for an open/high resistance. |
| ⇒ | If any of the DTCs set, replace the SDM. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for SDM replacement, setup, and programming |
