Operation CHARM: Car repair manuals for everyone.
Home >> Chevrolet >> 2012 >> Malibu V6-3.6L >> Repair and Diagnosis >> A L L Diagnostic Trouble Codes ( DTC ) >> Testing and Inspection >> B Code Charts >> B0084

B0084




DTC B0083 or B0084

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 B0083 02
- Left Front Impact Sensor Short to Ground

DTC B0083 05
- Left Front Impact Sensor High Voltage/Open

DTC B0083 39
- Left Front Impact Sensor Internal Electronic Failure

DTC B0083 3A
- Left Front Impact Sensor Incorrect Component Installed

DTC B0083 71
- Left Front Impact Sensor Invalid Serial Data Received

DTC B0084 02
- Right Front Impact Sensor Short to Ground

DTC B0084 04
- Right Front Impact Sensor Open

DTC B0084 39
- Right Front Impact Sensor Internal Electronic Failure

DTC B0084 3A
- Right Front Impact Sensor Incorrect Component Installed

DTC B0084 71
- Right Front Impact Sensor Invalid Serial Data Received

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 sensing and diagnostic module (SDM). 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:

B0083 02, B0084 02

* The sensor has been shorted to ground.

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

B0083 05, B0084 05

* The sensor circuit is open.

* The inflatable restraint sensing and diagnostic module has not received a message from the sensor for greater than 375 milliseconds.

B0083 39, B0084 39

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

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

B0083 3A, B0084 3A

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

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

B0083 71, B0084 71

The inflatable restraint sensing and diagnostic module has received invalid serial data from the sensor.

Action Taken When the DTC Sets

The inflatable restraint sensing and diagnostic module 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 (DH6)

Description and Operation

SIR 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:

* SIR Service Precautions Technician Safety Information

* 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.

- Seat belt retractor pretensioner

- Passenger instrument panel air bag

- Seat side air bag

- Roof rail air bag

- Inflatable restraint sensing and diagnostic module

- Seat belt retractor pretensioner wiring harness connector

- Passenger instrument panel air bag wiring harness connector

- Seat side air bag wiring harness connector

- Roof rail air bag 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.

1. Ignition ON. With a scan tool, verify that DTC B0083 or B0084 symptom byte 39 or 71 is not set as current.

• If DTC B0083 or B0084 symptom byte 39 or 71 is set as current
Replace the appropriate B59 impact sensor.

• If DTC B0083 or B0084 symptom byte 39 or 71 is not set as current

2. Verify that DTC B00083 or B0084 symptom byte 3A is not set as current.

• If DTC B00083 or B0084 symptom byte 3A is set as current
Replace the incorrect B59 front impact sensor

• If DTC B00083 or B0084 symptom byte 3A is not set as current

3. Verify that DTC B0083 or B0084 symptom byte 02 or 05 is not set as current.

• If DTC B0083 or B0084 symptom byte 02 or 05 is set as current
Refer to Circuit/System Testing.

• If DTC B0083 or B0084 symptom byte 02 or 05 is not set as current

4. All OK.

Circuit/System Testing

1. Ignition OFF. Disconnect the harness connector at the appropriate B59 impact sensor. It may take up to 2 minutes 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. Disconnect the X2 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. Ignition ON.

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

• If 1 V or greater

1. Ignition OFF. Disconnect the X2 harness connector at the K36 inflatable restraint sensing and diagnostic module. Ignition ON.

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

• If 1 V or greater, 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

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

• If 50k ohms or less

1. Disconnect the X2 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

6. Disconnect the X2 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 B59 front impact sensor terminal 1 and the K36 inflatable restraint sensing and diagnostic module terminal listed below:

* Right front impact sensor terminal 26 X2

* Left front impact sensor terminal 23 X2

• If 2 ohms or greater

8. Repair the short to voltage or an open/high resistance in the circuit.

• If less than 2 ohms

9. Ignition OFF, reconnect all harness connectors, press in the CPA (if equipped) until an audible and/or tactile click is heard.

10. Ignition ON, clear DTCs. Operate the vehicle within the Conditions for Running the DTC.

11. Verify DTC B00083 or B0084 does not set.

• If the DTC sets

1. Replace the B59 front impact sensor.

2. Verify the DTC does not set.

• If the DTC sets, replace the K36 inflatable restraint sensing and diagnostic module.

• If the DTC does not set.

3. All OK.

• If the DTC does not set

12. All OK.

Repair Instructions

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

* Front End Inflatable Restraint Discriminating Sensor Replacement Front End Inflatable Restraint Discriminating Sensor Replacement

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

pro multis · About Operation CHARM