Pinpoint Test J: LFC 42, 43, 44, 45 and 46/DTC B2296 Restraint System Impact Sensor Status
Normal Operation
The restraints control module (RCM) checks all of the impact sensor circuits for faults. If the RCM detects one of the following faults on any of the impact sensor circuits, it will store diagnostic trouble code (DTC) B2296 in memory and flash, depending on the fault, either lamp fault code (LFC) 42, 43, 44, 45 or 46 (or higher priority code if one exists) on the air bag indicator.
Fault Conditions
The RCM monitors for the following fault conditions:
low resistance.
high resistance or circuit open.
circuit short to voltage.
circuit short to ground.
Possible Causes
An impact sensor status fault can be caused by:
damaged wiring, terminals, or connectors.
a faulty impact sensor.
incorrect sensor mounting.
RCM is faulted.
PINPOINT TEST J : LFC 42, 43, 44, 45 AND 46/DTC B2296 RESTRAINT SYSTEM IMPACT SENSOR STATUS NOTE: Most faults are due to connector and/or wiring concerns. Carry out a thorough Inspection and Verification before proceeding with the Pinpoint Test.
J1 CHECK FOR A HARD OR INTERMITTENT DTC
WARNING: Restraint system diagnostic tools are for service only. Tools must be removed prior to operating the vehicle over the road. Failure to remove restraint system diagnostic tools could result in injury and possible violation of vehicle safety standards.
WARNING: Do not handle, move or change the original horizontal mounting position of the restraints control module (RCM) while the RCM is connected and the ignition switch is ON. Failure to follow these instructions may result in the inadvertent deployment of the safety canopy and risk of personal injury.
WARNING: Never probe the connectors on the air bag module. Doing so can result in air bag deployment, which can result in personal injury.
WARNING: The safety belt pretensioner is a pyrotechnic device. Always wear safety glasses when repairing an air bag equipped vehicle and when handling a safety belt buckle pretensioner or safety belt retractor pretensioner. Never probe a pretensioner electrical connector. Doing so could result in pretensioner or air bag deployment and could result in personal injury.
WARNING: Never probe the electrical connector on a safety canopy module. Doing so can result in safety canopy deployment.
NOTE: After diagnosing or repairing an SRS, the restraint system diagnostic tools must be removed before operating the vehicle over the road.
NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer.
Enter the following diagnostic mode on the scan tool: Retrieve/Flag/Record Continuous DTCs.
Enter the following diagnostic mode on the scan tool: On-Demand Self Test.
Enter the following diagnostic mode on the scan tool: Flag DTC B2296/Record All Flagged Faults.
Was DTC B2296 retrieved during the on-demand self test?
Yes This is a hard fault. The fault condition is still present. This fault cannot be cleared until it is corrected and the DTC is no longer retrieved during the on-demand self test.
Using the flagged faults recorded, GO to the appropriate pinpoint test step.
If a flagged fault of "?" was recorded, multiple faults exist and the entire pinpoint test must be carried out.
For first row driver side impact (F_D_SEN) sensor with a mounting/communications (COMM) fault, GO to J2 .
For first row driver side impact sensor (F_D_ SEN) with an internal (INT) fault, INSTALL a new first row driver side impact sensor. REFER to Side Impact Sensor Front Row in this section. GO to J54 .
For first row passenger side impact sensor (F_P_ SEN) with a mounting/communications (COMM) fault, GO to J12 .
For first row passenger side impact sensor (F_P_ SEN) with an internal (INT) fault, INSTALL a new passenger side impact sensor. REFER to Side Impact Sensor Front Row in this section. GO to J54 .
For second row driver side impact sensor (D_2_SEN) with a mounting/communication (COMM) fault, GO to J22 .
For second row driver side impact sensor (D_2_ SEN) with an internal (INT) fault, INSTALL a new second row driver side impact sensor. REFER toSide Impact Sensor Second Row. in this section. GO to J54 .
For second row passenger side impact sensor (P_2_ SEN) with a mounting/communications (COMM) fault, GO to J32 .
For second row passenger side impact sensor (P_2_SEN) with an internal (INT) fault, INSTALL a new second row passenger side impact sensor. REFER to Side Impact Sensor Second Row in this section. GO to J54 .
For front impact severity sensor C177 (FNT_SEN) with a mounting/communications (COMM) fault, GO to J42 .
For front impact severity sensor C177 (FNT_SEN) with an internal fault (INT) fault, INSTALL a new front impact severity sensor. REFER to Front Impact Severity Sensor in this section. GO to J54 .
No This is an intermittent fault. The fault condition is not present at this time. GO to J53 .
