Pinpoint Test T: DTC B103C - THERMO-Electric Driver Open Load

WARNING: This page is about a different car, the 2009 Mercury Milan, 2009 Lincoln MKZ, and 2009 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.

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.

T1 CHECK THE TED CIRCUITS FOR AN OPEN

Key in OFF position.
Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of SUPPLEMENTAL RESTRAINT SYSTEM article.
Disconnect the driver seat side air bag module C327.
Disconnect the passenger seat side air bag module C313.
Disconnect: DCSM C3305a
Disconnect: Cushion TED C3300
Disconnect: Backrest TED C3310

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 article.

Measure the resistance of the following circuits.

DCSM Connector-Pin	Circuit	TED Connector-Pin
C3305a-G	CHS02 (YE/BU)	C3300-1
C3305a-H	RHS02 (BU/OG)	C3300-3
C3305a-J	CHS01 (GY/VT)	C3310-1
C3305a-K	RHS01 (WH/VT) (VT/BK)	C3310-3

Are the resistances less than 5 ohms?

YES : Go to T2.
NO : REPAIR the affected circuit. REPEAT the self-test. CLEAR the DTCs.
DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327. CONNECT passenger seat side air bag module C313. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM article.

T2 CHECK THE TED CIRCUITS FOR SHORT TO VOLTAGE

Key in ON position.

Measure the voltage between the following DCSM pins, harness side and ground.

Connector-Pin	Circuit
C3305a-G	CHS02 (YE/BU)
C3305a-H	RHS02 (BU/OG)
C3305a-J	CHS01 (GY/VT)
C3305a-K	RHS01 (WH/VT)

Is any voltage present?

YES : REPAIR the affected circuit. REPEAT the self-test. CLEAR the DTCs.
DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327. CONNECT passenger seat side air bag module C313. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM article.
NO : Go to T3.

T3 CHECK THE RESISTANCE OF THE TEDS
- Key in OFF position.
- Measure the resistance between backrest TED C3310 pin 1 and pin 3, component side and between cushion TED C3310 pin 1 and pin 3, component side.
- Are the resistances between 0.9 and 10 ohms?
1. YES : INSTALL a new DCSM and CARRY OUT programmable module installation (PMI). REFER to Dual Climate Controlled Seat Module (DCSM) . REPEAT the self-test. CLEAR the DTCs.
  DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327. CONNECT passenger seat side air bag module C313. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM article.
2. 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 . REPEAT the self-test. CLEAR the DTCs.
  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 . REPEAT the self-test. CLEAR the DTCs.
  
  DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327. CONNECT passenger seat side air bag module C313. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM article.