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B0092





DTC B0092 or B0093

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 B0092 01
- Left Center Side Impact Sensor Short to Battery

DTC B0092 02
- Left Center Side Impact Sensor Short to Ground

DTC B0092 04
- Left Center Side Impact Sensor Open

DTC B0092 39
- Left Center Side Impact Sensor Internal Malfunction

DTC B0092 3A
- Left Center Side Impact Sensor Incorrect Component Installed

DTC B0092 71
- Left Center Side Impact Sensor Invalid Data

DTC B0093 01
- Right Center Side Impact Sensor Short to Battery

DTC B0093 02
- Right Center Side Impact Sensor Short to Ground

DTC B0093 04
- Right Center Side Impact Sensor Open

DTC B0093 39
- Right Center Side Impact Sensor Internal Malfunction

DTC B0093 3A
- Right Center Side Impact Sensor Incorrect Component Installed

DTC B0093 71
- Right Center Side Impact Sensor Invalid Data

Diagnostic Fault Information






Circuit/System Description

The impact sensors are equipped on vehicles to supplement the Supplemental Inflatable Restraint (SIR) System performance. The impact sensors are electronic and are not part of the deployment loops, but instead provide inputs to the inflatable restraint sensing and diagnostic module. The impact sensors can assist in determining the severity of some frontal and side collisions. The inflatable restraint sensing and diagnostic module uses the input from the impact sensors to assist in determining the severity of a collision further supporting air bag deployment. If the inflatable restraint sensing and diagnostic module determines a deployment is warranted, the inflatable restraint sensing and diagnostic module will cause current to flow through the deployment loops deploying the air bags.

Conditions for Running the DTC

Ignition voltage is between 9-16 V.

Conditions for Setting the DTC

Any of the following conditions exist for 10 seconds:

B0092 01, B0093 01

The impact sensor has been shorted to voltage.

B0092 02, B0093 02

* The impact sensor has been shorted to ground.

* The impact sensor current is greater than 23 mA for greater than 5 milliseconds.

B0092 04, B0093 04

The impact sensor has an open or high resistance.

B0092 39, B0093 39

* The inflatable restraint sensing and diagnostic module has received a Not OK message from the impact sensor.

* The inflatable restraint sensing and diagnostic module has not received a message.

B0092 3A, B0093 3A

* The inflatable restraint sensing and diagnostic module has received identification message from the impact sensor, which does not match the identification stored in the SDM memory.

* The inflatable restraint sensing and diagnostic module has reset the impact sensor twice without detecting the correct identification message.

B0092 71, B0093 71

The SDM has received invalid data from the sensor.

Action Taken When the DTC Sets

The SDM requests the instrument panel cluster to illuminate the AIR BAG indicator.

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.

* An ignition cycle is required for the DTC to go from current to history.

Reference Information

Schematic Reference

SIR Schematics [1][2]Air Bag Systems

Connector End View Reference

Component Connector End Views Sunshade - Left

Description and Operation

Supplemental Inflatable Restraint System Description and Operation Description and Operation

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 Verification

Note:

* Refer to SIR Service Precautions Service Precautions.

* Inspect all terminals for damage or corrosion when disconnecting connectors. Damage or corrosion in the following requires repair or replacement of the affected component/connector.

- Impact sensor

- Inflatable restraint sensing and diagnostic module

- Impact sensor wiring harness connector

- Inflatable restraint sensing and diagnostic module wiring harness connector

* The connector and connector position assurance (CPA) may seat independent of each other. Both the connector and CPA should seat with an audible and/or tactile click. The CPA isolates the shorting-bars within the connector allowing the deployment circuit to operate properly. Replace any CPA that is damaged or missing.

* If the condition is intermittent or cannot be duplicated, disconnect the connectors and add dielectric grease / lubricant (Nyogel 760G or equivalent, meeting GM specification 9986087). This procedure will correct the high resistance condition due to terminal fretting corrosion.

1. Verify that DTC B0092 or B0093 symptom byte 3A, 39, or 71 is not set as current.

• If DTC B0092 or B0093 symptom byte 3A, 39 or 71 is set as current
Replace the appropriate B63 Side Impact Sensor.

• If DTC B0092 or B0093 symptom byte 3A, 39 or 71 is not set as current

2. Verify that DTC B0092 or B0093 symptom byte 01, 02, or 04 is not set as current.

• If DTC B0092 or B0093 symptom byte 01, 02, or 04 is set as current
Refer to Circuit/System Testing.

• If DTC B0092 or B0093 symptom byte 01, 02, or 04 is not set as current

3. All OK.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the appropriate B63 Side Impact Sensor. It may take up to 2 min for all vehicle systems to power down.

2. Test for less than 10 ohms between the low reference circuit terminal 2 and ground.

• If 10 ohms or greater

1. Ignition OFF, disconnect the harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module.

2. Test for less than 2 ohms in the low reference circuit end to end.

• If 2 ohms or greater, repair the open/high resistance in the circuit.

• If less than 2 ohms, replace the K36 Inflatable Restraint Sensing and Diagnostic Module.

• If less than 10 ohms

3. Test for greater than 50k ohms between the signal circuit terminal 1 and ground.

• If 50k ohms or less

1. Disconnect the harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module.

2. Test for infinite resistance between the signal circuit and ground.

• If less than infinite resistance, repair the short to ground on the circuit.

• If infinite resistance, replace the K36 Inflatable Restraint Sensing and Diagnostic Module.

• If greater than 50k ohms

4. Ignition ON.

5. Test for less than 1 V between the signal circuit terminal 1 and ground.

• If 1 V or greater

1. Ignition OFF, disconnect the harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module, ignition ON.

2. Test for less than 1 V between the signal circuit and ground.

• If greater than 1 V, repair the short to voltage on the circuit.

• If less than 1 V, replace the K36 Inflatable Restraint Sensing and Diagnostic Module.

• If less than 1 V

6. Ignition OFF, disconnect the harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module.

7. Test for less than 2 ohms between the signal circuit end to end from the impact sensor terminal 1 and the K36 Inflatable Restraint Sensing and Diagnostic Module terminal listed below:

* Left Center Side Impact Sensor terminal 31 X2

* Right Center Side Impact Sensor terminal 52 X2

• If 2 ohms or greater
Repair the open/high resistance in the circuit.

• If less than 2 ohms

8. Connect all harness connectors. Ignition ON, clear the DTC.

9. Verify the DTC does not set.

• If the DTC sets
Replace the B63 Side Impact Sensor.

• If the DTC does not set

10. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the repair.

* Airbag Side Impact Sensor Replacement Airbag Side Impact Sensor Replacement

* Control Module References Control Module References for inflatable restraint sensing and diagnostic module replacement, programming and setup

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