Pinpoint Test Ac: DTC B111D

WARNING: This page is about a different car, the 2012 Ford Pickup. 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 repaired, 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.

AC1 CHECK THE TED BLOWER CIRCUIT FOR A SHORT TO GROUND
- Ignition OFF.
- Depower the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .
- Disconnect: Passenger Seat Side Air Bag Module C339.
- Disconnect: DCSM C3265C.
- Disconnect: Cushion TED C3040.
- Disconnect: Backrest TED C3039.
- Measure the resistance between DCSM C3265C-8, circuit CHS08 (BN/YE), harness side and ground.
  
  Fig 1: Measuring Resistance Between DCSM C3265C-8, Circuit CHS08 (BN/YE), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 10, 000 ohms?
  1. Yes : GO to AC2.
  2. No : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
    DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C339. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .
AC2 CHECK FOR A SHORT BETWEEN THE TED BLOWER CIRCUITS
- Measure the resistance between DCSM C3265C-7, circuit RHS08 (VT/WH), harness side and C3265C-8, circuit CHS08 (BN/YE), harness side.
  
  Fig 2: Measuring Resistance Between DCSM C3265C-7, Circuit RHS08 (VT/WH), Harness Side And C3265C-8, Circuit CHS08 (BN/YE), Harness Side
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 10, 000 ohms?
  1. Yes : GO to AC3.
  2. No : REPAIR the circuits. CLEAR the DTCs. REPEAT the self-test.
    DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C339. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .
AC3 CHECK THE BACKREST BLOWER AND CUSHION BLOWER RESISTANCES
- Measure the resistance between:
  - cushion TED C3040 pins 2 and 4, component side.
  - backrest TED C3039 pins 2 and 4, component side.
    
    Fig 3: Measuring Resistance Between Cushion TED C3040 Pins 2 And 4, Component Side
    Courtesy of FORD MOTOR CO.
- Are the resistances between 4, 000 and 10, 000 ohms?
  1. Yes : INSTALL a new DCSM. REFER to DUAL CLIMATE CONTROLLED SEAT MODULE (DCSM) . CLEAR the DTCs. REPEAT the self-test.
    DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C339. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .
  2. 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 . CLEAR the DTCs. REPEAT the self-test. If the backrest TED resistance is not between 4, 000 and 10, 000 ohms, INSTALL a new backrest TED. REFER to SEAT BACKREST THERMO-ELECTRIC DEVICE . CLEAR the DTCs. REPEAT the self-test. DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C339. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .