Pinpoint Test Ag: DTC B19A5

WARNING: This page is about a different car, the 2011 Mercury Milan, 2011 Lincoln MKZ, and 2011 Ford Fusion. 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: If a seat equipped with a seat mounted side air bag is being serviced, the Supplemental Restraint System (SRS) must be depowered. Refer to SUPPLEMENTAL RESTRAINT SYSTEM -- FUSION, MILAN & MKZ article.

NOTE: The air bag warning lamp illuminates when the Restraints Control Module (RCM) fuse is removed and the ignition switch is ON. This is normal operation and does not indicate an SRS fault.

NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer.

AG1 CHECK THE CUSHION TED BLOWER MOTOR SPEED CONTROL CIRCUIT FOR A SHORT TO GROUND
- Ignition OFF.
- Depower the SRS. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING article .
- Disconnect: Passenger Seat Side Air Bag C313.
- Disconnect: DCSM C3305C.
- Disconnect: Cushion TED C3303.
- Measure the resistance between DCSM C3305C-3, circuit VHS23 (BN/BU), harness side and ground.
  
  Fig 1: Measuring Resistance Between DCSM C3305C-3, Circuit VHS23 (BN/BU), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 10,000 ohms?
1. Yes : GO to AG2 .
2. No : REPAIR the circuit. REPEAT the self-test. CLEAR the DTCs.
  CONNECT passenger seat side air bag module C313. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM -- FUSION, MILAN & MKZ article.
AG2 CHECK THE CUSHION TED BLOWER MOTOR SPEED CONTROL AND BLOWER MOTOR GROUND CIRCUITS FOR A SHORT TOGETHER
- Measure the resistance between DCSM C3305C-3, circuit VHS23 (BN/BU), harness side and C3305C-7, circuit RHS08 (VT/WH), harness side.
  
  Fig 2: Measuring Resistance Between DCSM C3305C-3, Circuit VHS23 (BN/BU) And C3305C-7, Circuit RHS08 (VT/WH)
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 10,000 ohms?
1. Yes : INSTALL a new cushion TED. REFER to SEAT CUSHION THERMO-ELECTRIC DEVICE in this service information. REPEAT the self-test. CLEAR the DTCs.
  DISCONNECT the battery ground cable.
  
  CONNECT passenger seat side air bag module C313. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM -- FUSION, MILAN & MKZ article.
2. No : REPAIR the circuits. REPEAT the self-test. CLEAR the DTCs.
  CONNECT passenger seat side air bag module C313.
  
  REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM -- FUSION, MILAN & MKZ article.