Operation CHARM: Car repair manuals for everyone.
Home >> Chevrolet >> 2011 >> Corvette V8-6.2L SC >> Repair and Diagnosis >> A L L Diagnostic Trouble Codes ( DTC ) >> Testing and Inspection >> B Code Charts >> B0123

B0123




DTC B0012-B0019, B0027-B0030, B0039-B0041, B0045, B0046, B0056-B0076, B0085-B0089, B0106-B0114, B0118-B0124, or B3850-B3854

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 B0012
- Passenger Instrument Panel Air Bag Deployment Loop Stage 2 Resistance Low

DTC B0013
- Passenger Instrument Panel Air Bag Deployment Loop Stage 2 Open

DTC B0014
- Passenger Instrument Panel Air Bag Deployment Loop Stage 2 Voltage Out of Range

DTC B0016
- Passenger Instrument Panel Air Bag Deployment Loop Stage 1 Resistance Low

DTC B0017
- Passenger Instrument Panel Air Bag Deployment Loop Stage 1 Open

DTC B0018
- Passenger Instrument Panel Air Bag Deployment Loop Stage 1 Voltage Out of Range

DTC B0028
- Passenger Seat Side Air Bag Deployment Loop Resistance Low

DTC B0029
- Passenger Seat Side Air Bag Deployment Loop Open

DTC B0030
- Passenger Seat Side Air Bag Deployment Loop Voltage Out of Range

DTC B0040
- Driver Seat Side Air Bag Deployment Loop Resistance Low

DTC B0041
- Driver Seat Side Air Bag Deployment Loop Open

DTC B0045
- Driver Seat Side Air Bag Deployment Loop Voltage Out of Range

DTC B0057
- Passenger Seat Belt Buckle Pretensioner Deployment Loop Resistance Low

DTC B0058
- Passenger Seat Belt Buckle Pretensioner Deployment Loop Open

DTC B0059
- Passenger Seat Belt Buckle Pretensioner Deployment Loop Voltage Out of Range

DTC B0064
- Driver Seat Belt Buckle Pretensioner Deployment Loop Resistance Low

DTC B0065
- Driver Seat Belt Buckle Pretensioner Deployment Loop Open

DTC B0066
- Driver Seat Belt Buckle Pretensioner Deployment Loop Voltage Out of Range

Diagnostic Fault Information





Circuit/System Description

If a malfunction is detected, a DTC will be stored in non-volatile memory. During a side or frontal crash of sufficient force the inflatable restraint sensing and diagnostic module (SDM) will allow current to flow through the deployment loop in order to deploy the air bag or pretensioner. The SDM performs continuous diagnostic tests on the deployment loops to check for proper circuit continuity, shorts to ground, and shorts voltage. There are 2 shorting bars used within the module connector which will short together both high and low circuits, when the connector is disconnected. This will help to prevent unwanted deployment of the air bag or pretensioner during servicing.

Conditions for Running the DTC

Ignition voltage is between 9-16 volts.

Conditions for Setting the DTC

B0014, B0019, B0030, B0045, B0059, B0066

The air bag or pretensioner high and/or low circuit is shorted to ground for 120 milliseconds.

B0013, B0017, B0029, B0041, B0058, B0065
* The air bag or pretensioner stage 1 or stage 2 high circuit is less than 2.4 volts and the air bag or pretensioner stage 1 or stage 2 deployment loop is greater than 6 ohms for 500 milliseconds.
* The air bag or pretensioner stage 1 or stage 2 deployment loop resistance is greater than 4.8 ohms for 500 milliseconds.

B0014, B0019, B0030, B0045, B0059, B0066
* The air bag or pretensioner stage 1 or stage 2 high and/or low circuits is shorted to ground or shorted to voltage for 500 milliseconds.
* The air bag or pretensioner stage 1 or stage 2 high circuit is less than 2.4 volts and the air bag or pretensioner stage 1 or stage 2 deployment loop resistance is less than 6 ohms for 500 milliseconds.

B0014, B0019, B0030, B0045, B0059, B0066

The air bag or pretensioner high and/or low circuit is shorted to voltage for 120 milliseconds.

B0012, B0016, B0028, B0040, B0057, B0064

The air bag or pretensioner deployment loop resistance is less than 1.3 ohms for 500 milliseconds.

Action Taken When the DTC Sets

* The SDM requests the instrument panel cluster (IPC) to illuminate the AIR BAG indicator.
* The SDM will store a DTC, however if an event occurs the system will still attempt deployments.

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 (Connector End Views By Name)
Description and Operation

SIR System Description and Operation (Description and Operation)
Electrical Information Reference

* Circuit Testing (Circuit Testing)
* Connector Repairs (Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (Wiring Repairs)
* SIR/SRS Wiring Repairs (SIR/SRS Wiring Repairs)

Scan Tool Reference

Control Module References (Programming and Relearning) for scan tool information
Special Tools

J 38715-A Driver and Passenger SIR Load Tool

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.


* Pretensioner

* Air Bag

* SDM

* Pretensioner wiring harness connector

* Air bag wiring harness connector

* SDM wiring harness connector


Important: The connector and 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 OFF, disconnect the harness connector at the appropriate air bag or pretensioner.
2. With the appropriate adaptor, connect J 38715-A in place of the appropriate air bag or pretensioner.
3. Ignition ON, with a scan tool, verify DTC is set as current.

• If DTC is not set or is set as history, replace the appropriate air bag or pretensioner.

4. Ignition OFF, disconnect J 38715-A and the appropriate adaptor.
5. Disconnect the harness connector at the SDM.
6. Ignition ON, test for less than 1 volt between the appropriate high control circuit and ground.

* Passenger instrument panel air bag Stage 1 terminal 1 X1
* Passenger instrument panel air bag Stage 2 terminal 1 X2
* Driver seat side air bag terminal 1
* Passenger Seat side air bag terminal 1
* Driver seat belt buckle pretensioner terminal A
* Passenger seat belt buckle pretensioner terminal A

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

7. Test for less than 1 volt between the appropriate low control circuit terminal and ground.

* Passenger instrument panel air bag Stage 1 terminal 2 X1
* Passenger instrument panel air bag Stage 2 terminal 2 X2
* Driver seat side air bag terminal 2
* Passenger Seat side air bag terminal 2
* Driver seat belt buckle pretensioner terminal B
* Passenger seat belt buckle pretensioner terminal B

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

8. Ignition OFF, test for infinite resistance between the appropriate high control circuit terminal and ground.

* Passenger instrument panel air bag Stage 1 terminal 1 X1
* Passenger instrument panel air bag Stage 2 terminal 1 X2
* Driver seat side air bag terminal 1
* Passenger Seat side air bag terminal 1
* Driver seat belt buckle pretensioner terminal A
* Passenger seat belt buckle pretensioner terminal A

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

9. Test for infinite resistance between the appropriate low control circuit terminal and ground.

* Passenger instrument panel air bag Stage 1 terminal 2 X1
* Passenger instrument panel air bag Stage 2 terminal 2 X2
* Driver seat side air bag terminal 2
* Passenger Seat side air bag terminal 2
* Driver seat belt buckle pretensioner terminal B
* Passenger seat belt buckle pretensioner terminal B

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

10. Test for less than 1 ohm between the following high control circuit terminals.

* Passenger instrument panel air bag Stage 1 terminal 1 X1 and SDM terminal 9
* Passenger instrument panel air bag Stage 2 terminal 1 X2 and SDM terminal 30
* Driver seat side air bag terminal 1 and SDM terminal 17
* Passenger Seat side air bag terminal 1 and SDM terminal 14
* Driver seat belt buckle pretensioner terminal A and SDM terminal 38
* Passenger seat belt buckle pretensioner terminal A and SDM terminal 35

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

11. Test for less than 1 ohm between the following low control circuit terminals.

* Passenger instrument panel air bag Stage 1 terminal 2 X1 and SDM terminal 10
* Passenger instrument panel air bag Stage 2 terminal 2 X2 and SDM terminal 31
* Driver seat side air bag terminal 2 and SDM terminal 16
* Passenger Seat side air bag terminal 2 and SDM terminal 15
* Driver seat belt buckle pretensioner terminal B and SDM terminal 37
* Passenger seat belt buckle pretensioner terminal B and SDM terminal 36

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

12. If all circuits test normal, replace the SDM.

Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

* Instrument Panel Inflatable Restraint Module Replacement (Instrument Panel Inflatable Restraint Module Replacement)
* Driver or Passenger Seat Side Inflatable Restraint Module Replacement (Driver or Passenger Seat Side Inflatable Restraint Module Replacement)
* Inflatable Restraint Side Impact Module Wiring Harness Replacement (Inflatable Restraint Side Impact Module Wiring Harness Replacement)
* Seat Belt Buckle Pretensioner Replacement (Removal and Replacement)
* Control Module References (Programming and Relearning) for SDM replacement, setup, and programming

pro multis · About Operation CHARM