Pinpoint Test Ah: DTC B19A6

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 .

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.

AH1 CHECK THE BACKREST TED BLOWER SPEED CONTROL CIRCUIT FOR A SHORT TO GROUND
- Ignition OFF.
- Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of SUPPLEMENTAL RESTRAINT SYSTEM .
- Disconnect: Passenger Seat Side Air Bag C313.
- Disconnect: DCSM C3305C.
- Disconnect: Backrest TED C3311.
- Measure the resistance between DCSM C3305C-4, circuit VHS21 (BU/WH), harness side and ground.
  
  Fig 1: Measuring Resistance Between DCSM C3305C-4, Circuit VHS21 (BU/WH), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 10, 000 ohms?
  - Yes: GO to AH2.
  - 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 .
AH2 CHECK THE BACKREST TED BLOWER MOTOR SPEED CONTROL AND BLOWER MOTOR GROUND CIRCUITS FOR A SHORT TOGETHER
- Measure the resistance between DCSM C3305C-4, circuit VHS21 (BU/WH), harness side and C3305C-7, circuit RHS08 (VT/WH), harness side.
  
  Fig 2: Measuring Resistance Between DCSM C3305C-4, Circuit VHS21 (BU/WH) And C3305C-7, Circuit RHS08 (VT/WH)
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 10, 000 ohms?
  - Yes: INSTALL a new backrest TED. REFER to Seat Backrest Thermo-Electric Device . 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 .
  - 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 .