Pinpoint Test Ab: DTC B103C

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.

AB1 CHECK THE TED CIRCUITS FOR AN OPEN

Ignition OFF.
Depower the SRS . Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
Disconnect: Driver Seat Side Air Bag C328.
Disconnect: Passenger Seat Side Air Bag C327.
Disconnect: DCSM C3036A.
Disconnect: Driver Cushion TED C3327.
Disconnect: Driver Backrest TED C3322.
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 .

Measure the resistance between DCSM C3036A , harness side and driver cushion TED C3327 , harness side; and between DCSM C3036A , harness side and driver backrest TED C3322 , harness side using the following chart:

DCSM Connector	Circuit	TED Connector
C3036A-G	CHS02 (YE/BU)	C3327-1
C3036A-H	RHS02 (BU/OG)	C3327-3
C3036A-J	CHS01 (GY/VT)	C3322-1
C3036A-K	RHS01 (WH/VT)	C3322-3

Fig 1: Measuring Resistance Between DCSM (C3036A) And Driver Cushion TED (C3327)

Courtesy of FORD MOTOR CO.

Are the resistances less than 5 ohms?

Yes : GO to AB2 .
No : REPAIR the affected circuit. CLEAR the DTCs. REPEAT the self-test.
DISCONNECT the battery ground cable.

CONNECT passenger seat side air bag module C327.

CONNECT driver seat side air bag module C328.

REPOWER the SRS . REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

AB2 CHECK THE TED CIRCUITS FOR A SHORT TO VOLTAGE

Ignition ON.

Measure the voltage between DCSM C3036A, harness side and ground using the following chart:

DCSM Connector	Circuit
C3036A-G	CHS02 (YE/BU)
C3036A-H	RHS02 (BU/OG)
C3036A-J	CHS01 (GY/VT)
C3036A-K	RHS01 (WH/VT)

Fig 2: Measuring Voltage Between DCSM (C3036A), Harness Side And Ground

Courtesy of FORD MOTOR CO.

Is voltage present on any circuits?

Yes : REPAIR the affected circuit. CLEAR the DTCs. REPEAT the self-test.
DISCONNECT the battery ground cable.

CONNECT passenger seat side air bag module C327.

CONNECT driver seat side air bag module C328.

REPOWER the SRS . REFER to SUPPLEMENTAL RESTRAINT SYSTEM .
No : GO to AB3 .

AB3 CHECK THE RESISTANCE OF THE TEDs
- Ignition OFF.
- Measure the resistance between driver backrest TED C3322 pin 1 and pin 3, component side and between driver cushion TED C3327 pin 1 and pin 3, component side.
  
  Fig 3: Measuring Resistance Between Driver Backrest TED (C3322) Pin 1 And Pin 3
  Courtesy of FORD MOTOR CO.
Are the resistances between 0.9 and 10 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.
  
  CONNECT driver seat side air bag module C328.
  
  REPOWER the SRS . REFER to SUPPLEMENTAL RESTRAINT SYSTEM .
- No : If the resistance of the backrest TED was not between 0.9 and 10 ohms, INSTALL a new backrest TED . REFER to SEAT BACKREST THERMO-ELECTRIC DEVICE . CLEAR the DTCs. REPEAT the self-test.
  If the resistance of the cushion TED was not between 0.9 and 10 ohms, INSTALL a new cushion TED . REFER to SEAT CUSHION THERMO-ELECTRIC DEVICE . CLEAR the DTCs. REPEAT the self-test.
  
  DISCONNECT the battery ground cable.
  
  CONNECT passenger seat side air bag module C327.
  
  CONNECT driver seat side air bag module C328.
  
  REPOWER the SRS . REFER to SUPPLEMENTAL RESTRAINT SYSTEM .