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 B0086 01: Right Front/Passenger Side Impact Sensor Short to BatteryDTC B0086 02: Right Front/Passenger Side Impact Sensor Short to Ground
DTC B0086 04: Right Front/Passenger Side Impact Sensor Open Circuit
DTC B0086 39: Right Front/Passenger Side Impact Sensor Internal Electronic Failure
DTC B0086 3A: Right Front/Passenger Side Impact Sensor Invalid Serial Data Received
DTC B0086 71: Right Front/Passenger Side Impact Sensor Invalid Serial Data Received
DTC B0086 0F: Right Front/Passenger Side Impact Sensor Incorrect Component Installed
Diagnostic Fault Information
Circuit | Short to Ground | High Resistance | Open | Short to Voltage | Signal Performance |
|---|---|---|---|---|---|
Front End Sensor 1 High Signal | B0083 02 | B0083 0F | B0083 04 | B0083 01 | B0083 0F |
Front End Sensor 1 Low Reference | B0083 02 | B0083 0F | B0083 04 | B0083 01 | B0083 0F |
Front End Sensor 2 High Signal | B0084 02 | B0084 0F | B0084 04 | B0084 01 | B0084 0F |
Front End Sensor 2 Low Reference | B0084 02 | B0084 0F | B0084 04 | B0084 01 | B0084 0F |
Left Front Side Impact Sensor High Signal | B0085 02 | B0085 0F | B0085 04 | B0085 01 | B0085 0F |
Left Front Side Impact Low Reference | B0085 02 | B0085 0F | B0085 04 | B0085 01 | B0085 0F |
Right Front Side Impact Sensor High Signal | B0086 02 | B0086 0F | B0086 04 | B0086 01 | B0086 0F |
Right Front Side Impact Low Reference | B0086 02 | B0086 0F | B0086 04 | B0086 01 | B0086 0F |
Circuit/System Description
The inflatable restraint side impact sensor (SIS) utilizes a unidirectional 2-wire circuit. The SIS 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 SIS. When the ignition is turned ON and input power from the SDM is first detected, the SIS 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 SIS continually communicates status messages to the SDM, which determines if a fault is present in the SIS circuit. When a fault is detected, the SDM resets the SIS twice 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
B0086 01
| • | The SIS has been shorted to voltage. |
| • | The SDM has not received a message from the SIS for greater than 375 milliseconds. |
B0086 02
| • | The SIS has been shorted to ground. |
| • | The SIS current has been above 23 mA for greater than 5 milliseconds. |
B0086 04
The SIS circuit is open.
B0086 39
| • | The SDM has received a NOK message from the SIS. |
| • | The SDM has not received a message. |
B0086 3A
| • | The SDM has received an ID message from the SIS which does not match the ID stored in the SDM memory. |
| • | The SDM has reset the SIS twice without detecting the correct ID message. |
B0086 71
The SDM has received invalid serial data from the SIS.
B0086 0F
The SDM has received erratic messages from the SIS.
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
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: Refer to SIR Service Precautions .
When removing the connectors, inspect for damage or corrosion. Damage or corrosion to the following requires repair or replacement of the affected component/connector:| • | Front end sensor |
| • | SDM module |
| • | Front end sensor wiring harness connector |
| • | SDM wiring harness connector |
- Ignition OFF, disconnect the harness connector at the SDM and the right side impact sensor.
- Ignition ON, test for less than 1-volt between the side impact sensor voltage circuit terminal B and ground.
- Ignition ON, test for less than 1-volt between the side impact sensor signal circuit terminal A and ground.
- Test for infinite resistance between the side impact sensor voltage circuit terminal B and ground.
- Test for less than 1 ohm between the left side impact sensor terminal B and the SDM harness connector terminal 49.
- Test for less than 1 ohm between the left side impact sensor terminal A and the SDM harness connector terminal 48.
- If all circuits test normal, replace the right side impact sensor.
- Reconnect all SIR components. Ignition ON, verify the DTC does not set as current.
| ⇒ | If greater than the specified range, test the voltage circuit for a short to voltage |
| ⇒ | If greater than the specified range, test the signal circuit for a short to voltage. |
| ⇒ | If less than the specified value, test the voltage circuit for a short to ground. |
| ⇒ | If greater than the specified range, test the voltage circuit for an open/voltage resistance. |
| ⇒ | If greater than the specified range, test the signal circuit for an open/high resistance. |
| ⇒ | If the DTC resets as current, replace the SDM. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for SDM replacement, setup, and programming |
