Diagnostic Instructions
DTC Descriptors
DTC B0028: Right Front Side Deployment Loop Resistance Low
DTC B0029: Right Front Side Deployment Loop Open
DTC B0030: Right Front Side Deployment Loop Voltage Out of Range
Diagnostic Fault Information
Circuit
| Short to Ground
| Open/High Resistance
| Short to Voltage
| Signal Performance
|
Side Impact Module - RF High Circuit
| B0030
| B0030
| B0029
| B0028
|
Side Impact Module - RF Low Circuit
| B0030
| B0030
| B0029
| B0028
|
Circuit/System Description
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 roof rail module - right. The SDM performs continuous diagnostic
tests on the deployment loops to check for proper circuit continuity and for shorts to ground or voltage. A shorting bar used within the roof rail module - right connector which will short together both roof rail module - right high and low circuits
when the connector is disconnected, this will help to prevent unwanted deployment of the inflator module during servicing.
Conditions for Running the DTC
Ignition voltage is between 9-16 volts.
Conditions for Setting the DTC
B0028
The side impact module - RF deployment loop resistance is less than 1.3 ohms for 500 milliseconds.
B0029
| • | The side impact module - RF high circuit is less than 2.4 volts and the side impact module - RF deployment loop is greater than 6 ohms for 500 milliseconds. |
| • | The side impact module - RF deployment loop resistance is more than 4.8 ohms for 500 milliseconds. |
B0030
| • | The side impact module - RF high and/or low circuits has a short to ground or short to voltage for 500 milliseconds. |
| • | The side impact module - RF high circuit is less than 2.4 volts and side impact module - RF deployment loop resistance is less than 6 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 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. |
Diagnostic Aids
If there is more than one DTC set diagnose the open DTC first.
Reference Information
Schematic Reference
SIR Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
SIR System Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Special Tools
J 38715-A
Driver/Passenger Load tool
Circuit/System Testing
Important: When removing the connectors, inspect for damage or corrosion. Damage or corrosion to the following requires repair or replacement of the affected component/connector:
| • | Inflatable restraint module |
| • | Front side impact module wiring harness connector |
| • | SDM wiring harness connector |
Important: 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 shoring-bars within the connector
allowing the deployment circuit to operate properly.
- Verify that the RF inflatable restraint side impact module connector and CPA are engaged.
| ⇒ | If the above condition is not found, make the appropriate repair. |
- Ignition OFF, disconnect the harness connector at the RF inflatable restraint side impact module.
- With the appropriate load tool adapter, connect
J 38715-A
in place of the RF inflatable restraint side impact module.
- Ignition ON, with a scan tool, verify that DTC B0028, B0029, or B0030 is set as current.
| ⇒ | If a DTC is not set or is set as history, cycle the ignition OFF, disconnect the load tool and adapter, reconnect the harness connector at the RF inflatable restraint side impact module, and cycle the ignition ON. If the DTC resets after reconnecting
the module, replace the RF inflatable restraint side impact module. |
- Ignition OFF, disconnect the load tool and the adapter.
- Disconnect the harness connector at the SDM.
- Ignition ON, test for less than 1.0 volt between the low control circuit terminal A and ground.
| ⇒ | If greater than the specified range, test the circuit for a short to voltage. |
- Ignition ON, test for less than 1.0 volt between the high control circuit terminal B and ground.
| ⇒ | If greater than the specified range, test the circuit for a short to voltage. |
- Ignition OFF, test for infinite resistance between the low control circuit terminal A and ground.
| ⇒ | If less than the specified value, test the circuit for a short to ground. |
- Ignition OFF, test for infinite resistance between the high control circuit terminal B and ground.
| ⇒ | If less than the specified value, test the circuit for a short to ground. |
- Test for less than 1.0 ohm between the low control circuit terminal A and the SDM terminal listed below:
| • | With RPO code AJ7 terminal C3 |
| • | With RPO code AW9 terminal 19 |
| ⇒ | If greater than the specified range, test the signal circuit for an open/high resistance. |
- Test for less than 1.0 ohm between the high control circuit terminal B and the SDM terminal lister below:
| • | With RPO code AJ7 terminal C4 |
| • | With RPO code AW9 terminal 18 |
| ⇒ | If greater than the specified range, test the signal circuit for an open/high resistance. |
- If all circuits test normal, replace the SDM.
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic procedure.
