Pinpoint Test Ar: DTC B272F

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.

AR1 CHECK THE TED BLOWER MOTOR CIRCUITS FOR A SHORT TO VOLTAGE

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: Cushion TED C3303.
Disconnect: Backrest TED C3311.

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 C3305C, harness side and ground using the following chart.

DCSM Connector	Circuit
C3305C-8	CHS08 (BN/YE)
C3305C-7	RHS08 (VT/WH)

Fig 1: Measuring Voltage Between DCSM C3305C, Harness Side And Ground

Courtesy of FORD MOTOR CO.

Is voltage present on either circuit?
- Yes: REPAIR the circuit(s). 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: GO to AR2.

AR2 CHECK THE TED BLOWER MOTOR CIRCUITS FOR AN OPEN

Ignition OFF.

Measure the resistance between DCSM C3305C, harness side and cushion TED C3300, harness side using the following chart.

DCSM Connector	Circuit	Cushion TED Connector
C3305C-8	CHS08 (BN/YE)	C3303-2
C3305C-7	RHS08 (VT/WH)	C3303-4

Fig 2: Checking TED Blower Motor Circuits For Open

Courtesy of FORD MOTOR CO.

Are the resistances less than 5 ohms?
- Yes: GO to AR3.
- No: REPAIR the circuit(s). 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 .

AR3 CHECK THE RESISTANCE OF THE CUSHION AND BACKREST TED BLOWER MOTORS
- Measure the resistance between:
  - cushion TED C3303 pins 2 and 4, component side.
  - backrest TED C3311 pins 2 and 4, component side.
- Are the resistances between 4, 000 and 10, 000 ohms?
  - Yes: INSTALL a new DCSM. REFER to Dual Climate Controlled Seat Module (DCSM) . 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: If the cushion TED resistance is not between 4, 000 and 10, 000 ohms, INSTALL a new cushion TED. REFER to Seat Cushion Thermo-Electric Device . REPEAT the self-test. CLEAR the DTCs.
    If backrest the TED resistance is not between 4, 000 and 10, 000 ohms, 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 .