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Pinpoint Test Av: DTC B272E

WARNING: This page is about a different car, the 2010 Lincoln MKX and 2010 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: When taking measurements at Dual Climate Controlled Seat Module (DCSM) harness connectors, do not insert the electrical probes into the female connector pins. Inserting the probes into connector pins can cause intermittent or open electrical connections after reassembly resulting in Diagnostic Trouble Codes (DTCs) and system failure. Touching the tip of these connector pins is recommended instead.
NOTE: The air bag warning indicator illuminates when the correct Restraints Control Module (RCM) fuse is removed and the ignition is ON.
NOTE: The Supplemental Restraint System (SRS) must be fully operational and free of faults before releasing the vehicle to the customer.
  1. AV1 CHECK DCSM CLIMATE-CONTROLLED SEAT HEAT COMMAND (TED_HEAT_D) PID 
    • Access the cushion and backrest TEDs  and remove the filters to watch the TED  fans.
    • Connect the scan tool.
    • Enter the following diagnostic mode on the scan tool: DataLogger - DCSM  PID TED_HEAT_D.
      • NOTE: The DCSM  active command TED_HEAT_D is limited to 15 seconds in the ON state.
    • Operate the climate controlled seat using the active command while monitoring the cushion and backrest TEDs  for fan movement.
    • Did both fans turn on? 
  2. AV2 CHECK FOR AN INTERMITTENT CONNECTION AT THE DCSM 
    • Ignition OFF.
    • Disconnect: DCSM  C3036c.
    • Connect: DCSM  C3036c.
    • With the engine running and using the switches on the HVAC module, turn the driver climate controlled seat system on while monitoring the cushion and backrest fans for movement.
      • If there is fan movement, run the driver climate controlled seat system for 2 minutes.
    • Did the climate controlled seat operate correctly? 
    • Yes:  The fault is intermittent. CHECK for causes of the intermittent fault at C3036c and REPAIR the circuit. REPEAT the self-test. CLEAR the DTCs.
    • No:  GO to AV3  .
  3. AV3 CHECK FOR AN INTERMITTENT CONNECTION AT THE CUSHION TED 
    • Ignition OFF.
    • Disconnect: Cushion TED  C3327.
    • Connect: Cushion TED  C3327.
    • With the engine running and using the switches on the HVAC module, turn the driver climate controlled seat system on while monitoring the cushion and backrest fans for movement.
      • If there is fan movement, run the driver climate controlled seat system for 2 minutes.
    • Did the climate controlled seat operate correctly? 
    • Yes:  The fault is intermittent. CHECK for causes of the intermittent fault at C3327 and REPAIR the circuit. REPEAT the self-test. CLEAR the DTCs.
    • No:  GO to AV4  .
  4. AV4 CHECK FOR AN INTERMITTENT CONNECTION AT THE BACKREST TED 
    • Ignition OFF.
    • Disconnect: Backrest TED  C3322.
    • Connect: Backrest TED  C3322.
    • With the engine running and using the switches on the HVAC module, turn the driver climate controlled seat system on while monitoring the cushion and backrest fans for movement.
      • If there is fan movement, run the driver climate controlled seat system for 2 minutes.
    • Did the climate controlled seat operate correctly? 
    • Yes:  The fault is intermittent. CHECK for causes of the intermittent fault at C3322 and REPAIR the circuit. REPEAT the self-test. CLEAR the DTCs.
    • No:  GO to AV5  .
  5. AV5 CHECK BLOWER CIRCUIT CHS03 (GN/BN) FOR A SHORT TO VOLTAGE 
    • Ignition OFF.
    • Depower the SRS  . Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
    • Disconnect: Driver Seat Side Air Bag C328.
    • Disconnect: Passenger Seat Side Air Bag C327.
    • Disconnect: DCSM  C3036c.
    • Disconnect: Cushion TED  C3327.
    • Disconnect: Backrest TED  C3322.
      • WARNING: Make sure no one is in the vehicle and there is nothing blocking or placed in front of any air bag module when the battery is connected. Failure to follow these instructions may result in serious personal injury in the event of an accidental deployment.
    • Connect the battery ground cable. Refer to BATTERY, MOUNTING AND CABLES .
    • Ignition ON.
    • Measure the voltage between DCSM  C3036c-16, circuit CHS03 (GN/BN), harness side and ground.
      Fig 1: Measuring Voltage Between DCSM C3036c-16, Circuit CHS03 (GN/BN), Harness Side And Ground
      G06134519Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
    • Yes:  REPAIR the circuit. REPEAT the self-test. CLEAR the DTCs.

      DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C328. CONNECT passenger seat side air bag module C327.

      REPOWER the SRS  . REFER to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .

    • No:  GO to AV6  .
  6. AV6 CHECK CUSHION TED BLOWER CIRCUITS CHS03 (GN/BN) AND RHS03 (GY/OG) FOR AN OPEN 
    • Measure the resistance between:
      • DCSM  C3036c-16, circuit CHS03 (GN/BN), harness side and cushion TED  C3327-2, circuit CHS03 (GN/BN), harness side.
      • DCSM  C3036c-15, circuit RHS03 (GY/OG), harness side and cushion TED  C3327-4, circuit RHS03 (GY/OG), harness side.
        Fig 2: Measuring Resistance Between DCSM C3036c-16, Circuit CHS03 (GN/BN) And Cushion TED C3327-2, Circuit CHS03 (GN/BN)
        G06077025Courtesy of FORD MOTOR CO.
    • Are the resistances less than 5 ohms? 
    • Yes:  GO to AV7  .
    • No:  REPAIR the affected circuit. REPEAT the self-test. CLEAR the DTCs.

      DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C328. CONNECT passenger seat side air bag module C327.

      REPOWER the SRS  . REFER to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .

  7. AV7 CHECK BACKREST TED BLOWER CIRCUITS CHS03 (GN/BN) AND RHS03 (GY/OG) FOR AN OPEN 
    • Measure the resistance between:
      • DCSM  C3036c-16, circuit CHS03 (GN/BN), harness side and cushion TED  C3322-2, circuit CHS03 (GN/BN), harness side.
      • DCSM  C3036c-15, circuit RHS03 (GY/OG), harness side and cushion TED  C3322-4, circuit RHS03 (GY/OG), harness side.
        Fig 3: Measuring Resistance Between DCSM C3036c-16, Circuit CHS03 (GN/BN) And Cushion TED C3327-2, Circuit CHS03 (GN/BN)
        G06077025Courtesy of FORD MOTOR CO.
    • Are the resistances less than 5 ohms? 
    • Yes:  GO to AV8  .
    • No:  REPAIR the affected circuit. REPEAT the self-test. CLEAR the DTCs.

      DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C328. CONNECT passenger seat side air bag module C327.

      REPOWER the SRS  . REFER to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .

  8. AV8 CHECK THE BLOWER RESISTANCE 
      NOTE: The ohmmeter must be connected with the positive lead to pin 2 and the negative lead to pin 4 when measuring. Ohmmeter leads incorrectly connected will result in false readings and lead to incorrect identification of components that are not faulty.
    • Measure the resistance between cushion TED  C3327 pin 2 and pin 4, component side and between backrest TED  C3322 pin 2 and pin 4, component side.
      Fig 4: Measuring Resistance Between Cushion TED C3327 Pin 2 And Pin 4, Component Side
      G06077017Courtesy of FORD MOTOR CO.
    • Are the resistances between 4,000 ohms and 10,000 ohms? 
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