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B0088




DTC B0083-B0088

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 B0085 00

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Left Front Side Impact Sensor

DTC B0085 0F

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Left Front Side Impact Sensor Erratic

DTC B0085 39

-
Left Front Side Impact Sensor Internal Electronic Failure

DTC B0085 3A

-
Left Front Side Impact Sensor Incorrect Component Installed

DTC B0086 00

-
Right Front Side Impact Sensor

DTC B0086 0F

-
Right Front Side Impact Sensor Erratic

DTC B0086 39

-
Right Front Impact Sensor Internal Electronic Failure

DTC B0086 3A

-
Right Front Impact Sensor Incorrect Component Installed

DTC B0087 00

-
Left Rear Side Impact Sensor

DTC B0087 0F

-
Left Rear Side Impact Sensor Erratic

DTC B0087 39

-
Left Rear Side Impact Sensor Internal Electronic Failure

DTC B0087 3A

-
Left Rear Side Impact Sensor Incorrect Component Installed

DTC B0088 00

-
Right Rear Side Impact Sensor

DTC B0088 0F

-
Right Rear Side Impact Sensor Erratic

DTC B0088 39

-
Right Rear Side Impact Sensor Internal Electronic Failure

DTC B0088 3A

-
Right Rear Side Impact Sensor Incorrect Component Installed

Diagnostic Fault Information






Circuit/System Description

The side impact sensor utilizes a unidirectional 2-wire circuit. The side impact 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 side impact sensor. When the ignition is turned ON and input power from the SDM is first detected, the side impact 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 side impact sensor continually communicates status messages to the SDM, which determines if a fault is present in the side impact sensor circuit. When a fault is detected, the SDM may reset the side impact 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

Any of the following conditions exist:

B0085 00, B0086 00, B0087 00, B0088 00

* The side impact sensor has been shorted to voltage, open, or shorted to ground.

* The side impact sensor current has been above 23 mA for greater than 5 milliseconds.

* The SDM has not received a message from the side impact sensor for more than 375 milliseconds.

B0085 0F, B0086 0F, B0087 0F, B0088 0F

The SDM has received erratic messages from the side impact sensor.

B0085 39, B0086 39, B0087 39, B0088 39

* The SDM has received a Not Ok (NOK) message from the side impact sensor.

* The SDM has not received a message.

* The SDM has received invalid serial data from the side impact sensor.

B0085 3A, B0086 3A, B0087 3A, B0088 3A

* The SDM has received an ID message from the side impact sensor, which does not match the ID stored in the SDM memory.

* The SDM has reset the side impact sensor twice without detecting the correct ID message.

B0085 71, B0086 71, B0087 71, B0088 71

The SDM has received invalid serial data from the side impact 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 1-2 Shift Solenoid (SS) Valve (M30)

Description and Operation

SIR System Description and Operation SIR System

Electrical Information Reference

* Circuit Testing Circuit Testing

* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections

* Connector Repairs Connector Repairs

* Wiring Repairs Wiring Repairs

Scan Tool Reference

Control Module References Control Module References for scan tool information

Circuit/System Testing

Important:
Refer to SIR Service Precautions Technician Safety Information.


When removing connectors, inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected component/connector:


* Side impact sensor


* SDM


* Side impact sensor wiring harness connector


* SDM wiring harness connector


1. Ignition OFF, disconnect the harness connector at the appropriate impact sensor and the SDM.

2. Ignition ON, test for less than 1 volt between the signal circuit terminal B and ground.

• If greater than the specified range, test the signal circuit for a short to voltage.

3. Ignition ON, test for less than 1 volt between the low reference circuit terminal A and ground.

• If greater than the specified range, test the low reference circuit for a short to voltage.

4. Test for infinite resistance between the signal circuit terminal B and ground.

• If less than the specified value, test the signal circuit for a short to ground.

5. Test for less than 1 ohm between the signal circuit terminal B at the impact sensor and the appropriate SDM harness connector terminal listed below:

* Right front side impact sensor - terminal 43.

* Left front side impact sensor - terminal 42.

* Right rear side impact sensor - terminal 45.

* Left rear side impact sensor - terminal 44.

• If greater than the specified range, test the signal circuit for an open/high resistance.

6. Test for less than 1 ohm between the low reference circuit terminal A at the impact sensor and the appropriate SDM harness connector terminal listed below:

* Right front side impact sensor - terminal 41.

* Left front side impact sensor - terminal 40.

* Right rear side impact sensor - terminal 47.

* Left rear side impact sensor - terminal 46.

• If greater than the specified range, test the low reference circuit for an open/high resistance.

7. If all circuits test normal, test or replace the appropriate impact sensor.

8. Reconnect all SIR components. Ignition ON, verify the DTC is 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 Side Impact Sensor Replacement - Front Inflatable Restraint Side Impact Sensor Replacement - Front

* Inflatable Restraint Side Impact Sensor Replacement - Left Side Rear Inflatable Restraint Side Impact Sensor Replacement - Left Side Rear

* Inflatable Restraint Side Impact Sensor Replacement - Right Side Rear (with E24) Inflatable Restraint Side Impact Sensor Replacement - Right Side Rear (with E24)Inflatable Restraint Side Impact Sensor Replacement - Right Side Rear (with YA2) Inflatable Restraint Side Impact Sensor Replacement - Right Side Rear (with YA2)

* SIR/SRS Wiring Repairs SIR/SRS Wiring Repairs

* Control Module References Control Module References for SDM replacement, setup, and programming

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