Pinpoint Test BM: DTC B19A3

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 switch is on.

NOTE: The Supplemental Restraint System (SRS) must be fully operational and free of faults before releasing the vehicle to the customer.

BM1 CHECK THE CUSHION TED BLOWER MOTOR SPEED CONTROL CIRCUIT 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 C367.
- Disconnect: Driver Safety Belt Buckle C3065.
- Disconnect: Passenger Seat Side Air Bag C337.
- Disconnect: Passenger Safety Belt Buckle C3066.
- Disconnect: DCSM C3265C.
- WARNING: Make sure no one is in the vehicle and there is nothing blocking or placed in front of any airbag 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 Removal and Installation .
- Ignition ON.
- Measure voltage between C3265C-11 , circuit VHS18 (BN/GN), harness side and ground.
  
  Fig 1: Measuring Voltage Between C3265C-11, Circuit VHS18 (BN/GN) And Ground
  Courtesy of FORD MOTOR CO.
Is any voltage present?
- Yes : GO to BM2 .
- No : GO to BM3.
BM2 CHECK THE CUSHION TED BLOWER MOTOR SPEED CONTROL CIRCUIT FOR A SHORT TO VOLTAGE
- Disconnect: Cushion TED C3035.
- Measure voltage between C3265C-11 , circuit VHS18 (BN/GN), harness side and ground.
  
  Fig 2: Measuring Voltage Between C3265C-11, Circuit VHS18 (BN/GN) And Ground
  Courtesy of FORD MOTOR CO.
Is any voltage present?
- Yes : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
  DISCONNECT the battery ground cable. CONNECT passenger seat side air bag C337 and passenger safety belt buckle C3066. CONNECT driver seat side air bag C367 and driver safety belt buckle C3065. REPOWER the SRS . REFER to Supplemental Restraint System (SRS) Depowering and Repowering .
- No : GO to BM3 .
BM3 CHECK THE CUSHION TED BLOWER MOTOR SPEED CONTROL AND BLOWER MOTOR FEED CIRCUITS FOR A SHORT TOGETHER
- Ignition OFF.
- Disconnect: Cushion TED C3035.
- Measure the resistance between DCSM C3265C-11 , circuit VHS18 (BN/GN), harness side and C3265C-16 , circuit CHS03 (GN/BN), harness side.
  
  Fig 3: Measuring Resistance Between DCSM C3265C-11, Circuit VHS18 (BN/GN) And C3265C-16, Circuit CHS03 (GN/BN)
  Courtesy of FORD MOTOR CO.
Is the resistance greater than 10, 000 ohms?
- Yes : GO to BM4 .
- No : REPAIR the circuits. CLEAR the DTCs. REPEAT the self-test.
  DISCONNECT the battery ground cable. CONNECT passenger seat side air bag C337 and passenger safety belt buckle C3066. CONNECT driver seat side air bag C367 and driver safety belt buckle C3065. REPOWER the SRS . REFER to Supplemental Restraint System (SRS) Depowering and Repowering .
BM4 CHECK THE CUSHION TED RESISTANCE FOR AN INTERNAL SHORT
- Measure the resistance between cushion TED C3035 pin 2 and pin 7, component side.
  
  Fig 4: Measuring Resistance Between Cushion TED C3035 Pin 2 And Pin 7
  Courtesy of FORD MOTOR CO.
Is the resistance greater than 2, 000, 000 ohms?
- Yes : INSTALL a new DCSM . REFER to DUAL CLIMATE CONTROLLED SEAT MODULE (DCSM) in this article. CLEAR the DTCs. REPEAT the self-test.
  DISCONNECT the battery ground cable. CONNECT passenger seat side air bag C337 and passenger safety belt buckle C3066. CONNECT driver seat side air bag C367 and driver safety belt buckle C3065. REPOWER the SRS . REFER to Supplemental Restraint System (SRS) Depowering and Repowering .
- No : INSTALL a new cushion TED . REFER to SEAT CUSHION THERMO-ELECTRIC DEVICE in this article. CLEAR the DTCs. REPEAT the self-test.
  DISCONNECT the battery ground cable. CONNECT passenger seat side air bag C337 and passenger safety belt buckle C3066. CONNECT driver seat side air bag C367 and driver safety belt buckle C3065. REPOWER the SRS . REFER to Supplemental Restraint System (SRS) Depowering and Repowering .