B2229
Air Bag and Safety Belt Pretensioner Supplemental Restraint System (SRS)
Pinpoint Test AD: DTC B2229
Refer to Wiring Diagrams Set 46, Supplemental Restraint System for schematic and connector information. Electrical Diagrams
Normal Operation
The Restraints Control Module (RCM) continuously monitors the passenger air bag module stage 2 and circuits for the following faults:
- Resistance out of range
- Unexpected voltage
- Short to ground
- Faulted passenger air bag module
If a fault is detected, the RCM (Restraints Control Module) will store DTC B2229 in memory and send a message to the Instrument Cluster (IC) module to illuminate the air bag warning indicator.
- DTC B2229 (Air Bag Passenger Circuit Short to Ground - Loop #2)- When the RCM (Restraints Control Module) senses a short to ground on either passenger air bag stage 2 circuit, a fault will be indicated.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Passengers air bag module
- RCM (Restraints Control Module)
PINPOINT TEST AD : DTC B2229
WARNING: Never probe the electrical connectors on air bag, Safety Canopy(R) or side air curtain modules. Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.
NOTICE: Use the correct probe adapter(s) from the Flex Probe Kit when taking measurements. Failure to use the correct probe adapter(s) may damage the connector.
Most faults are due to connector and/or wiring concerns. Carry out a thorough inspection and verification before proceeding with the pinpoint test. Inspection and Verification
NOTE: Supplemental Restraint System (SRS) components should only be disconnected or reconnected when instructed to do so within a pinpoint test step. Failure to follow this instruction may result in incorrect diagnosis of the SRS (Supplemental Restraint System).
NOTE: The SRS (Supplemental Restraint System) must be fully operational and free of faults before releasing the vehicle to the customer.
AD1 RETRIEVE RCM (Restraints Control Module) DTCs
NOTE: All RCM (Restraints Control Module) diagnosis will be carried out using Continuous Memory Diagnostic Trouble Codes (CMDTCs) and status information. Refer to DTC Fault Reporting and Status Information. DTC Fault Reporting and Status Information
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: Self Test- RCM (Restraints Control Module).
- Select the DTC and view DTC Status information.
Does the status information for DTC B2229 indicate a fault was present at the time of request?
Yes
This fault cannot be cleared until it is corrected and the DTC Status information indicates the fault is no longer present.
GO to AD2.
No
This is an intermittent fault. The DTC Status information indicates the fault was not present at time of request. GO to AD6.
AD2 CHECK THE PASSENGER AIR BAG STAGE 2 FOR A FAULT STATUS CHANGE (SHORT TO GROUND INDICATED)
NOTE: This pinpoint test step will attempt to change the fault reported by the RCM (Restraints Control Module) by inducing a different fault condition. If the fault reported changes, this indicates the RCM (Restraints Control Module) is functioning correctly and is not the source of the fault.
- Ignition OFF.
- Depower the SRS (Supplemental Restraint System). Refer to Supplemental Restraint System (SRS) Depowering and Repowering Supplemental Restraint System (SRS) Depowering and Repowering.
- Disconnect passenger air bag module C256A and C256B:
- remove the passenger air bag module and disconnect. Refer to Passenger Air Bag Module .
- Repower the SRS (Supplemental Restraint System). Do not prove out the SRS (Supplemental Restraint System) at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering Supplemental Restraint System (SRS) Depowering and Repowering.
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: Self Test- RCM (Restraints Control Module).
- Select the DTC and view DTC Status information.
- DIAGNOSTIC TIP: When viewing DTCs with the passenger air bag module disconnected, open circuit faults would normally be retrieved on stage 1 and 2.
Does the status information for DTC B2229 indicate a fault was present at the time of request?
Yes
GO to AD3.
No
GO to AD4.
AD3 CHECK THE PASSENGER AIR BAG STAGE 2 CIRCUITS FOR A SHORT TO GROUND
- Ignition OFF.
- Depower the system. Refer to Supplemental Restraint System (SRS) Depowering and Repowering Supplemental Restraint System (SRS) Depowering and Repowering.
- Disconnect: RCM (Restraints Control Module) C310A and C310B.
- Measure the resistance between passenger air bag module:
- C256B-1, circuit 15S-JA32 (GN/YE), harness side and ground.
- C256B-2, circuit 91S-JA32 (BK/YE), harness side and ground.
Are the resistances greater than 10,000 ohms?
Yes
GO to AD5.
No
REPAIR circuit 15S-JA32 (GN/YE) or 91S-JA32 (BK/YE). GO to AD7.
AD4 CONFIRM THE PASSENGER AIR BAG MODULE FAULT
NOTE: Make sure all restraint system components and the RCM (Restraints Control Module) electrical connectors are connected before carrying out the self-test. If not, DTCs will be recorded.
- Ignition OFF.
- Depower the SRS (Supplemental Restraint System). Refer to Supplemental Restraint System (SRS) Depowering and Repowering Supplemental Restraint System (SRS) Depowering and Repowering.
- Connect: Passenger Air Bag Module C256A and C256B.
- Repower the SRS (Supplemental Restraint System). Do not prove out the SRS (Supplemental Restraint System) at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering Supplemental Restraint System (SRS) Depowering and Repowering.
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: Self Test- RCM (Restraints Control Module).
Does the status information for DTC B2229 indicate a fault was present at the time of request?
Yes
INSTALL a new passenger air bag module. REFER to Passenger Air Bag Module . GO to AD7.
No
In the process of diagnosing the fault, the fault condition has become intermittent. Do not install any new SRS (Supplemental Restraint System) components at this time. SRS (Supplemental Restraint System) components should only be installed when directed to do so in the pinpoint test.
GO to AD6.
AD5 CONFIRM THE RCM (Restraints Control Module) FAULT
NOTE: Make sure all restraint system components and the RCM (Restraints Control Module) electrical connectors are connected before carrying out the self-test. If not, DTCs will be recorded.
- Ignition OFF.
- Depower the SRS (Supplemental Restraint System). Refer to Supplemental Restraint System (SRS) Depowering and Repowering Supplemental Restraint System (SRS) Depowering and Repowering.
- Prior to reconnecting any previously disconnected SRS (Supplemental Restraint System) component:
- inspect connector(s) (including any in-line connectors) for pushed-out, loose or spread terminals and loose or frayed wire connections at terminals.
- inspect wire harness for any damage, pinched, cut or pierced wires.
- inspect RCM (Restraints Control Module) C310A and C310B Connector Position Assurance (CPA) lever/lock for correct operation. Refer to Restraints Control Module (RCM) .
- repair any concerns found.
Refer to Wiring Diagrams Set 5, Connector Repair Procedures for schematic and connector information. Electrical Diagrams
- Connect: RCM (Restraints Control Module) C310A and C310B.
- Connect: Passenger Air Bag Module C256A and C256B.
- Repower the SRS (Supplemental Restraint System). Do not prove out the SRS (Supplemental Restraint System) at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering Supplemental Restraint System (SRS) Depowering and Repowering.
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: Self Test- RCM (Restraints Control Module).
- Select the DTC and view DTC Status information.
Does the status information for DTC B2229 indicate a fault was present at the time of request?
Yes
INSTALL a new RCM (Restraints Control Module). REFER to Restraints Control Module (RCM) . GO to AD7.
No
In the process of diagnosing the fault, the fault condition has become intermittent. Do not install any new SRS (Supplemental Restraint System) components at this time. SRS (Supplemental Restraint System) components should only be installed when directed to do so in the pinpoint test. GO to AD6.
AD6 CHECK FOR AN INTERMITTENT FAULT
- Ignition OFF.
- Depower the SRS (Supplemental Restraint System). Refer to Supplemental Restraint System (SRS) Depowering and Repowering Supplemental Restraint System (SRS) Depowering and Repowering.
- Disconnect passenger air bag module C256A and C256B:
- remove the passenger air bag module and disconnect. Refer to Passenger Air Bag Module .
- Disconnect: RCM (Restraints Control Module) C310A and C310B.
- Inspect for the following:
- inspect harness and component connectors for loose or spread terminals and loose or frayed wire connections at terminals.
- inspect wire harness for any damage, pinched, cut or pierced wires.
- inspect RCM (Restraints Control Module) C310A and C310B CPA (Connector Position Assurance) lever/lock for correct operation. Refer to Restraints Control Module (RCM) .
- repair any concerns found.
Refer to Wiring Diagrams Set 5, Connector Repair Procedures for schematic and connector information. Electrical Diagrams
- Connect: All Previously Disconnected Component(s)/Connector(s).
- Repower the SRS (Supplemental Restraint System). Do not prove out the SRS (Supplemental Restraint System) at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering Supplemental Restraint System (SRS) Depowering and Repowering.
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: Self Test- RCM (Restraints Control Module).
- Select the DTC and view DTC Status information.
Does the status information for DTC B2229 indicate a fault was present at the time of request?
Yes
The fault condition is now present. Do not clear any DTCs until all DTC concerns have been resolved.
GO to AD2.
No
The fault is not present and cannot be recreated at this time. Do not install any new SRS (Supplemental Restraint System) components at this time. SRS (Supplemental Restraint System) components should only be installed when directed to do so in the pinpoint test. GO to AD7.
AD7 CHECK FOR ADDITIONAL SRS (Supplemental Restraint System) DTCs
- Ignition OFF.
WARNING: Turn the ignition OFF and wait one minute to deplete the backup power supply. Failure to follow this instruction may result in serious personal injury or death in the event of an accidental deployment.
- Reconnect all SRS (Supplemental Restraint System) components (if previously disconnected).
- If previously directed to depower the SRS (Supplemental Restraint System), repower the SRS (Supplemental Restraint System). Do not prove out the SRS (Supplemental Restraint System) at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering Supplemental Restraint System (SRS) Depowering and Repowering.
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: Self Test- Restraints.
NOTE: When selecting Restraints from the Self Test menu, DTCs will be retrieved from the RCM (Restraints Control Module) and OCSM (Occupant Classification System Module).
- Select the DTC and view DTC Status information.
Does the status information for any RCM (Restraints Control Module) DTC indicate a fault is present and/or are any OCSM (Occupant Classification System Module) on-demand DTCs retrieved?
Yes
Do not clear any DTCs until all DTC concerns have been resolved. GO to the DTC Charts for pinpoint test direction. Air Bag Systems / Seat Belt Systems
No
CLEAR all RCM (Restraints Control Module) and OCSM (Occupant Classification System Module) CMDTCs (Continuous Memory Diagnostic Trouble Codes). PROVE OUT the SRS (Supplemental Restraint System). Repair is complete. RETURN the vehicle to the customer.