B1610
DTC B1610
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 B1610
- Right Frontal Restraints Sensor
Circuit/System Description
The inflatable restraint front end sensor utilizes a bidirectional 2-wire circuit. The front end sensor modulates current on the interface to send ID, state of health, and deployment commands to the inflatable restraint sensing and diagnostic module (SDM). The SDM serves as a power source and a ground for the front end sensor. When the ignition is turned ON and input power from the SDM is first detected, the front end sensor responds by performing internal diagnostics and sending an ID to the SDM. The SDM considers the ID to be valid if the response time is less than 5 seconds. The front end sensor continually communicates status messages to the SDM, which determines if a fault is present in the front end sensor circuit. When a fault is detected, the SDM may reset the front end sensor up to 2 times by removing and reapplying power to it. If the fault is still present, the SDM will set a DTC.
Conditions for Running the DTC
Ignition voltage is between 9-16 volts.
Conditions for Setting the DTC
Any of the following conditions exist for 2 seconds:
B1610
* The front end sensor circuit is shorted.
* The front end sensor circuit is open.
* Front end sensor malfunction.
* SDM malfunction.
Action Taken When the DTC Sets
* The SDM commands the AIR BAG indicator ON.
* 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.
Reference Information
Schematic Reference
SIR Schematics ([1][2]Air Bag Systems)
Connector End View Reference
Component Connector End Views (Connector Views)
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 (Programming and Relearning) for scan tool information.
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:
* The front end sensor
* The SDM module
* The front end sensor wiring harness connector
* The SDM wiring harness connector
1. Ignition OFF, disconnect the harness connector at the SDM and the appropriate sensor.
2. Ignition ON, test for less than 1 volt between the signal circuit terminal 29 and ground.
• If greater than the specified range, repair the circuit for a short to voltage.
3. Ignition ON, test for less than 1 volt between the low reference circuit terminal 27 and ground.
• If greater than the specified range, repair the circuit for a short to voltage.
4. Test for infinite resistance between the signal circuit terminal 29 and ground.
• If less than infinite resistance, repair the circuit for a short to ground.
5. Test for less than 1 ohm between right front end sensor terminal 1 and SDM harness connector terminal 27.
• If greater than the specified range, repair the circuit for an open/high resistance.
6. Test for less then 1 ohm between right front end sensor terminal 2 and SDM harness connector terminal 29.
• If greater than the specified range, repair the circuit for an open/high resistance.
7. If all circuits test normal, replace the appropriate sensor.
8. Reconnect all SIR components. Ignition ON, with a scan tool clear and check for DTCs.
• If the DTC returns and is current, replace the SDM.
Repair Instructions
Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.
* Inflatable Restraint Front End Sensor Replacement (Inflatable Restraint Front End Sensor Replacement)
* Inflatable Restraint Side Impact Sensor Replacement (Front) (Inflatable Restraint Side Impact Sensor Replacement (Front))Inflatable Restraint Side Impact Sensor Replacement (Rear) (Inflatable Restraint Side Impact Sensor Replacement (Rear))
* SIR/SRS Wiring Repairs (SIR/SRS Wiring Repairs)
* Control Module References (Programming and Relearning) for SDM replacement, setup, and programming