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Home >> Ford >> 2005 >> Escape Base, 3.0 1, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 88 (Supplemental Inflatable Restraint System -- F250-F550 Super Duty) >> Diagnosis And Testing >> Pinpoint Tests - Air Bag Supplemental Restraint System (SRS) >> Pinpoint Test B: DTC B1869 - Lamp Air Bag Warning Indicator Circuit Open >> Pinpoint Test B: DTC B1869 - Lamp Air Bag Warning Indicator Circuit Open

Pinpoint Test B: DTC B1869 - Lamp Air Bag Warning Indicator Circuit Open

WARNING: This page is about a different car, the 2005 Ford Pickup, 2005 Ford F550 Super Duty, 2005 Ford F450 Super Duty, and 2005 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
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 ON-DEMAND AND CONTINUOUS DTCs 
    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: Never probe the connectors on the air bag module. Doing so can result in air bag deployment, which can result in personal injury.
    NOTE: After diagnosing or repairing a supplemental restraint system (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 diagnostic tool: Retrieve/Record On-Demand DTCs.
    • Enter the following diagnostic mode on the diagnostic tool: Retrieve/Record Continuous DTCs.
    • Was DTC B1869 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.

      If the air bag indicator lamp does  illuminate, GO to B2.

      If the air bag indicator does not  illuminate, GO to  B4.

    • No  : This is an intermittent fault. The fault condition is not present at this time. GO to  B7.
  2. B2 CHECK THE AIR BAG INDICATOR CIRCUIT FOR A SHORT TO GROUND 
    • Key in OFF position.
    • Depower the system. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING  in this article
    • Disconnect: Instrument Cluster Module C220a.
    • Measure the resistance between the instrument cluster module C220a pin 14, circuit 608 (BK/YE), harness side and ground.
      Fig 1: Measuring Resistance Between Instrument Cluster Module C220A Pin 14, Circuit 608 And Ground
      G03926201Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
    • Yes  : GO to  B6.
    • No  : GO to B3.
  3. B3 CHECK THE RCM FOR A SHORT TO GROUND 
    • Disconnect: RCM C2041.
    • Measure the resistance between RCM C2041 pin 20, circuit 608 (BK/YE), component side and ground.
      Fig 2: Measuring Resistance Between RCM C2041 Pin 20, Circuit 608 And Ground
      G03912036Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
    • Yes  : REPAIR circuit 608 (BK/YE). GO to  B8.
    • No  : GO to  B6.
  4. B4 CHECK AIR BAG INDICATOR CIRCUIT FOR AN OPEN 
    • Yes  : GO to  B6.
    • No  : GO to B5.
  5. B5 CHECK CIRCUIT 608 (BK/YE) FOR AN OPEN 
    • Key in OFF position.
    • Depower the system. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING  in this article.
    • Disconnect: Instrument Cluster Module C220a.
    • Measure the resistance between instrument cluster module C220a pin 14, circuit 608 (BK/YE), harness side and ground.
      Fig 3: Measuring Resistance Between Instrument Cluster Module C220A Pin 14 Circuit 608 And Ground
      G03926201Courtesy of FORD MOTOR CO.
    • Is the resistance less than 0.5 ohm? 
    • Yes  : REPAIR or INSTALL a new instrument cluster module. REFER to INSTRUMENT CLUSTER . GO to  B8.
    • No  : REPAIR circuit 608 (BK/YE). GO to  B8.
  6. B6 CONFIRM THE RCM FAULT 
    NOTE: Make sure all restraint system diagnostic tools, sensor electrical connectors and the RCM electrical connector are connected before carrying out the on-demand self test. If not, erroneous DTCs will be recorded.
    • Yes  : INSTALL and CONFIGURE a new RCM. REFER to RESTRAINTS CONTROL MODULE (RCM)  in this article. GO to  B8.
    • No  : CHECK for causes of intermittent open or short to ground on circuit 608 (BK/YE). ATTEMPT to recreate the hard fault by flexing the wire harness and cycling the ignition key frequently. ACTIVATE other systems in the same wire harness. REPAIR any intermittent concerns found. GO to  B8.
  7. B7 CHECK FOR AN INTERMITTENT FAULT 
    • Key in OFF position.
    • Enter the following diagnostic mode on the diagnostic tool: On-Demand Self Test.
    • Was DTC B1869 retrieved during the on-demand self test? 
    • 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.
    • No  : CHECK for causes of intermittent open or short to ground on circuit 608 (BK/YE). ATTEMPT to recreate the hard fault by flexing the wire harness and cycling the ignition key frequently. ACTIVATE other systems in the same wire harness. REPAIR any intermittent concerns found. GO to B8.
  8. B8 CHECK FOR ADDITIONAL DTCs 
    • Refer to the continuous DTCs recorded during Step  B1.
    • Were any continuous DTCs retrieved during Step   B1 ? 
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