Pinpoint Test Ah: DTC B19A2

WARNING: This page is about a different car, the 2014 Lincoln MKX and 2014 Ford Edge. 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 .

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 PASSENGER BACKREST TED BLOWER SPEED CONTROL CIRCUIT FOR A SHORT TO VOLTAGE
- Ignition OFF.
- Depower the SRS . Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
- Disconnect: Passenger Seat Side Air Bag C327.
- Disconnect: DCSM C3036C.
- 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 BATTERY, MOUNTING AND CABLES .
- Ignition ON.
- Measure the voltage between C3036C-4 , circuit VHS21 (BU/WH), harness side and ground.
  
  Fig 1: Measuring Voltage Between (C3036C-4), Circuit VHS21 (BU/WH), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
Is any voltage present?
- Yes : GO to AH2 .
- No : GO to AH3.
AH2 CHECK THE PASSENGER BACKREST TED BLOWER SPEED CONTROL CIRCUIT FOR A SHORT TO VOLTAGE
- Disconnect: Passenger Backrest TED C3326.
- Measure the voltage between DCSM C3036C-4 , circuit VHS21 (BU/WH), harness side and ground.
  
  Fig 2: Measuring Voltage Between DCSM (C3036C-4), Circuit VHS21 (BU/WH), Harness Side 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 module C327.
  
  REPOWER the SRS . REFER to SUPPLEMENTAL RESTRAINT SYSTEM .
- No : GO to AH3 .
AH3 CHECK THE PASSENGER BACKREST TED BLOWER SPEED CONTROL AND BLOWER OUTPUT CIRCUITS FOR A SHORT TOGETHER
- Ignition OFF.
- Disconnect: Passenger Backrest TED C3326.
- Measure the resistance between DCSM C3036C-4 , circuit VHS21 (BU/WH), harness side and C3036C-8 , circuit CHS08 (BN/YE), harness side.
  
  Fig 3: Measuring Resistance Between DCSM (C3036C-4), Circuit VHS21 (BU/WH) And (C3036C-8), Circuit CHS08 (BN/YE)
  Courtesy of FORD MOTOR CO.
Is the resistance greater than 10, 000 ohms?
- Yes : GO to AH4 .
- No : REPAIR the circuits. CLEAR the DTCs. REPEAT the self-test.
  DISCONNECT the battery ground cable.
  
  CONNECT passenger seat side air bag module C327.
  
  REPOWER the SRS . REFER to SUPPLEMENTAL RESTRAINT SYSTEM .
AH4 CHECK THE BACKREST TED RESISTANCE FOR AN INTERNAL SHORT
- Measure the resistance between passenger backrest TED C3326 pin 2 and pin 7, component side.
  
  Fig 4: Measuring Resistance Between Passenger Backrest TED (C3326) 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) . REPEAT the self-test. CLEAR the DTCs.
  DISCONNECT the battery ground cable.
  
  CONNECT passenger seat side air bag module C327.
  
  REPOWER the SRS . REFER to SUPPLEMENTAL RESTRAINT SYSTEM .
- No : 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 C327.
  
  REPOWER the SRS . REFER to SUPPLEMENTAL RESTRAINT SYSTEM .