Pinpoint Test V: DTC B103C - Thermoelectric Driver Open Load

WARNING: This page is about a different car, the 2006 Mercury Milan, 2006 Lincoln Zephyr, and 2006 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.

V1 CHECK THE TED CIRCUITS FOR AN OPEN

WARNING: The restraint system diagnostic tool is for restraint system service only. Remove from vehicle prior to road use. Failure to remove could result in injury and possible violation of vehicle safety standards.

NOTE: If a seat equipped with a supplemental restraint system (SRS) component is being serviced, the SRS must be depowered. Refer to SUPPLEMENTAL RESTRAINT SYSTEM .

NOTE: The air bag warning lamp illuminates when the RCM fuse is removed and the ignition switch is ON. This is normal operation and does not indicate a supplemental restraint system (SRS) fault.

NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer.

Key in OFF position.

WARNING: Be sure that nobody is in the vehicle and that there is nothing blocking or set in front of any air bag module when the battery ground cable is connected.

For vehicles with seat side air bags, carry out the following:
- Depower the SRS. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
- Disconnect the driver seat side air bag module C327.
- Connect restraint system diagnostic tool 418-133 to driver seat side air bag module C327.
- Disconnect the passenger seat side air bag module C313.
- Connect restraint system diagnostic tool 418-133 to passenger seat side air bag module C313.
- Connect the battery ground cable.
Disconnect: DCSM C3305a.
Disconnect: Cushion TED C3300.
Disconnect: Backrest TED C3310.

Measure the resistance of the following circuits.

CONNECTOR-PIN CIRCUIT CHART

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 V2.

No : REPAIR the affected circuit. REPEAT the self-test. CLEAR the DTCs.

If equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C327 and CONNECT driver seat side air bag module C327. DISCONNECT the restraint system diagnostic tool from passenger seat side air bag module C313 and CONNECT passenger seat side air bag module C313. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

V2 CHECK THE TED CIRCUITS FOR SHORT TO VOLTAGE

Key in ON position.

Measure the voltage between the following DCSM C3305a pins, harness side and ground.

CONNECTOR-PIN CIRCUIT CHART

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

Is voltage present on any circuit?

Yes : REPAIR the affected circuit. REPEAT the self-test. CLEAR the DTCs.

No : GO to V3.

V3 CHECK 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.
  
  Fig 1: Checking Resistance Of TED
  Courtesy of FORD MOTOR CO.
- Are the resistances between 0.9 and 10 ohms?
Yes : INSTALL a new DCSM and CARRY OUT programmable module installation (PMI). REFER to CLIMATE CONTROLLED SEAT MODULE . REPEAT the self-test. CLEAR the DTCs.

If equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C327 and CONNECT driver seat side air bag module C327. DISCONNECT the restraint system diagnostic tool from passenger seat side air bag module C313 and CONNECT passenger seat side air bag module C313. 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. 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. REPEAT the self-test. CLEAR the DTCs.

If equipped with seat side air bags, DISCONNECT the battery ground cable. DISCONNECT the restraint system diagnostic tool from driver seat side air bag module C327 and CONNECT driver seat side air bag module C327. DISCONNECT the restraint system diagnostic tool from passenger seat side air bag module C313 and CONNECT passenger seat side air bag module C313. REPOWER the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .