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Home >> Ford >> 2009 >> Flex Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1355 (Supplemental Inflatable Restraint System) >> Diagnostic Tests >> Air Bag and Safety Belt Pretensioner Supplemental Restraint System (SRS) >> Pinpoint Tests >> Pinpoint Test B: DTC B1046, B1047, B1048, B1049, B1054, B1055, B1056, B1057, B1058, B1059, B2A3F and/or B2A40 - Cross Link to Another Firing Loop Fault(s) >> Pinpoint Test B: Cross Link To Another Firing Loop

Pinpoint Test B: Cross Link To Another Firing Loop

WARNING: This page is about a different car, the 2008 Mercury Sable, 2008 Ford Taurus X, and 2008 Ford Taurus. However, it is still accessible from the selected car via links, so may be relevant.
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 this instruction may result in the accidental deployment of the safety canopy and cause serious personal injury or death.
WARNING: Never probe the electrical connectors on air bag, safety canopy 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.
WARNING: Never probe the electrical connectors on safety belt buckle/retractor pretensioners or adaptive load limiting retractors. Failure to follow this instruction may result in the accidental deployment of the safety belt pretensioners or adaptive load limiting retractors, which increases the risk of serious personal injury or death.
NOTE: Use the correct probe adapter(s) when taking measurements. Failure to use the correct probe adapter(s) may damage the connector.
NOTE: The supplemental restraint system (SRS) must be fully operational and free of faults before releasing the vehicle to the customer.
NOTE: 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. 
NOTE: Most faults are due to connector and/or wiring concerns. Carry out a thorough inspection and verification before proceeding with the pinpoint test.
  1. B1 CHECK FOR CONTINUOUS AND ON-DEMAND DTCs 
    • Enter the following diagnostic mode on the diagnostic tool: RCM Self Test/Retrieve and Record On-Demand and Continuous Memory DTCs
      NOTE: Cross link DTCs will be retrieved in pairs, the highest priority along with the DTC of the component it is cross linked to.
    • Were any on-demand cross link DTCs retrieved? 
    1. 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. Go to  B2.
    2. NO  : This is an intermittent fault when present as a continuous memory DTC only (DTC not retrieved on-demand). The fault condition is not present at this time. Go to  B4.
  2. B2 CHECK DEPLOYABLE CIRCUITS FOR A CROSS LINK FAULT 
    • Key in OFF position.
    • Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Disconnect: RCM C310a and C310b
    • Disconnect ALL of the affected  deployable devices.
      • NOTE: Most cross link faults are due to connector and/or wiring harness damage. Carry out a thorough inspection of connector(s) and/or wiring harness for damage.
    • Using the following table, measure the resistance between the circuits of the affected deployable devices.
      Squib/Loop/(DTC) Connector - Pin Circuit
      Driver safety canopy module (B1046)
      • Taurus X,  C9018-1
      • Taurus and Sable,  C9031-1
      • Taurus X,  C9018-3
      • Taurus and Sable,  C9031-2
      • CR109 (BN/BU)
      • RR109 (BU/GN)
      Driver side air bag module (B1047)
      • C3226-1
      • C3226-2
      • CR105 (GN/BN)
      • RR105 (GY/YE)
      Passenger air bag module loop 1 (B1048)
      • C256a-1
      • C256a-2
      • CR103 (GY/BU)
      • RR103 (VT/GN)
      Passenger safety belt buckle pretensioner (B1049)
      • C3066-1
      • C3066-2
      • CR164 (BN/VT)
      • RR164 (YE/BU)
      Driver safety belt buckle pretensioner (B1054)
      • C3065-1
      • C3065-2
      • CR163 (GN/VT)
      • RR163 (WH/BN)
      Passenger side air bag module (B1055)
      • C3227-1
      • C3227-2
      • CR106 (VT/GY)
      • RR106 (YE/OG)
      Passenger safety canopy module (B1056)
      • Taurus X,  C9019-1
      • Taurus and Sable,  C9032-1
      • Taurus X,  C9019-3
      • Taurus and Sable,  C9032-2
      • CR111 (BN/WH)
      • RR111 (YE/VT)
      Driver air bag module loop 1 (B1057)
      • Driver air bag module loop 1 electrical connector
      • RR101 (YE/GN)
      • CR101 (VT/BN)
      Driver air bag module loop 2 (B1058)
      • Driver air bag module loop 2 electrical connector
      • RR102 (WH)
      • CR102 (BU)
      Passenger air bag module loop 2 (B1059)
      • C256b-1
      • C256b-2
      • CR104 (YE/GY)
      • RR104 (WH/BU)
      Driver adaptive load limiting retractor (B2A3F)
      • C354-1
      • C354-2
      • CR146 (GY/VT)
      • RR146 (BU/BN)
      Passenger adaptive load limiting retractor (B2A40)
      • C389-1
      • C389-2
      • CR147 (GN/OG)
      • RR147 (YE/VT)
    • Are the resistances greater than 10,000 ohms between the affected circuits? 
    1. YES  : Go to  B3.
    2. NO  : REPAIR the affected circuits. Go to  B5.
  3. B3 CONFIRM THE RCM FAULT 
    NOTE: Make sure all restraint system components, sensor electrical connectors and the RCM electrical connectors are connected before carrying out the on-demand self test. If not, erroneous DTCs will be recorded.
    • Connect: All Previously Disconnected Restraint System Component(s)
    • Connect: RCM C310a and C310b
    • Repower the SRS. Do not  prove out the SRS at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Enter the following diagnostic mode on the diagnostic tool: RCM Self Test/Retrieve and Record On-Demand DTCs
    • Were any on-demand cross link DTCs retrieved? 
    1. YES  : INSTALL a new RCM and CARRY OUT programmable module installation (PMI). REFER to Restraints Control Module (RCM) . Go to  B5.
    2. NO  : In the process of diagnosing the fault, the fault condition has become intermittent. CHECK for causes of the intermittent fault in the areas previously worked in, particularly the pins and terminals of electrical connectors that were disconnected. Go to  B4.
  4. B4 CHECK FOR AN INTERMITTENT FAULT 
    NOTE: Most cross link faults are due to connector and/or wiring harness damage. Carry out a thorough inspection of connector(s) and/or wiring harness for damage.
    • Key in OFF position.
    • Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Disconnect ALL of the affected  deployable devices.
    • Inspect the wiring harness(es) for any type of damage. Repair as necessary. Refer to appropriate SYSTEM WIRING DIAGRAMS article, Supplemental Restraint System for schematic and connector information.
    • Repower the SRS. Do not  prove out the SRS at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Enter the following diagnostic mode on the diagnostic tool: RCM Self Test/Retrieve and Record On-Demand DTCs
    • Were any on-demand cross link DTCs retrieved? 
    1. YES  : This is a hard fault. The fault condition is now present. This fault cannot be cleared until it is corrected and the DTC is no longer retrieved during the on-demand self test. Go to  B2.
    2. NO  : CHECK for causes of the intermittent fault. ATTEMPT to recreate the hard fault by flexing the wire harness and cycling the ignition key frequently.Do not install any new SRS components at this time. SRS components should only be installed when directed to do so in the pinpoint test.  REPAIR any intermittent wiring, terminal or connector concerns found. Go to  B5.
  5. B5 CHECK FOR ADDITIONAL SRS DTCs 
    • Key in OFF position.
      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 components (If previously disconnected).
    • Key in ON position.
    • Enter the following diagnostic mode on the diagnostic tool: RCM Self Test/Retrieve and Record On-Demand and Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: Clear all RCM and OCSM Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: Self Test/RCM
    • Are any RCM DTCs retrieved indicating a fault? 
    1. YES  : Do not clear any DTCs until all DTCs have been resolved. Go to the SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DTC TABLE  for pinpoint test direction.
    2. NO  : PROVE OUT the SRS. REPAIR is complete. RETURN the vehicle to the customer.
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