B0086

DTC B0086

DTC DESCRIPTORS

DTC B0086 01
Right Front/Passenger Side Impact Sensor Short to Battery

DTC 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 0F
Right Front/Passenger Side Impact Sensor Incorrect Component Installed

DTC B0086 3A
Right Front/Passenger Side Impact Sensor Invalid Serial Data Received

DIAGNOSTIC FAULT INFORMATION






IMPORTANT: Always perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Testing and Inspection

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
All of the following conditions exist for 2.5 seconds:

B0086 01
- The SIS has been shorted to voltage.
- The SDM has not received a message from the SIS for more than 375 milliseconds.

B0086 02
- The SIS has been shorted to ground.
- The SIS current has been above 23 mA for longer 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 71
The SDM has received invalid serial data from the SIS.

B0086 0F
The SDM has received erratic messages from the SIS.

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.

ACTION TAKEN WHEN THE DTC SETS
- The SDM commands the AIR BAG indicator ON via serial data communications.
- The SIR System is disabled and no deployments are allowed.

CONDITIONS FOR CLEARING THE DTC
- The condition responsible for setting the DTC no longer exists and the scan tool Clear DTCs function is used.
- A history DTC will clear once 255 malfunction-free ignition cycles have occurred.

CIRCUIT/SYSTEM TESTING
1. Ignition OFF, disconnect the right SIS connector.

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 SIS
- The SDM module
- The SIS wiring harness connector
- The SDM wiring harness connector

2. Remove the SDM connector.
3. Test the signal and voltage circuits between the SDM and SIS for a short to voltage, short to ground, or open/low resistance. Verify that a short to voltage, short to ground, or open/low resistance does not exist.
- If any of the above conditions are found make the appropriate repair.
4. Reconnect all SIR components. With the ignition ON use the scan tool to clear the DTCs then recheck for DTCs to be cleared.
- If DTC B0086 was current replace the SIS - right. After replacement
REPAIR INSTRUCTIONS

IMPORTANT: Always perform the Diagnostic Repair Verification after completing the diagnostic procedure. Verification Tests

- Inflatable Restraint Side Impact Sensor Replacement
- Control Module References for SDM replacement, setup, and programming.

REPAIR VERIFICATION
Ignition ON, use the scan tool to clear the DTCs then recheck for DTCs.
- If DTC B0086 was current replace the SDM.